Alert archive / Oregon / Winter Storm Warnings in 2017

Winter Storm Warning 18, NWS Medford, OR

December 18, 20176 counties in Oregon; Siskiyou County, California

NWS Medford, OR issued this winter storm warning at Dec 18, 2017, 3:58 PM PST for 6 counties in Oregon; Siskiyou County, California. It took effect at Dec 19, 2017, 1:00 PM PST. It was in force for 20 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 18, 2017, 3:58 PM PST (23:58 UTC)
In effect from
Dec 19, 2017, 1:00 PM PST
Expired
Dec 20, 2017, 9:12 AM PST
In force
20 hr
Issued by
NWS Medford, OR

Counties Siskiyou County, CA, Coos County, OR, Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR, Lake County, OR

The radar

The Medford radar (KMAX), 61 km from the middle of the area, began a volume at 00:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 12.0 hours before the alert went out and 33 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 2017-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2017-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
939 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

147 
WWUS46 KMFR 182358
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
358 PM PST Mon Dec 18 2017

ORZ029-030-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.NEW.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Chemult, 
Crescent, and Gilchrist
358 PM PST Mon Dec 18 2017

...WINTER STORM WARNING ABOVE 2500 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow ABOVE 2500 feet expected. Light to moderate 
  snow above 2000 feet expected. Warning level accumulations of 4 
  to 8 inches, with localized amounts up to 10 inches expected. 
  Total snow accumulations of 2 to 4 inches, with localized 
  amounts up to 6 inches expected.

* WHERE: The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAIL: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ027-028-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.NEW.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
358 PM PST Mon Dec 18 2017

...WINTER STORM WARNING ABOVE 2500 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow above 2500 feet expected. Light to moderate snow
  above 2000 feet expected. Winter storm warning accumulations in
  the Cascades of 12 to 18 inches with localized amounts up to 20
  inches expected. Winter weather advisory accumulations of 3 to 
  6 inches with localized amounts up to 9 inches expected.

* WHERE: Winter Storm Warning for most of the Cascade Crests,
  Highways 62 and 138 near Crater Lake and Diamond Lake.
  Additionally, highway 140 between White City and Klamath Falls.
  Winter Weather Advisory for Interstate 5 at Siskiyou Summit and
  Highway 66.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ023-025-026-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.NEW.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
358 PM PST Mon Dec 18 2017

...WINTER STORM WARNING IN EFFECT ABOVE 2500 FEET FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow above 2500 feet expected. Light to moderate
  snow above 2000 feet expected. Total snow accumulations above
  2500 feet 3 to 6 inches inches with localized amounts up to 10 
  inches are expected. Snow accumulations above 2000 feet of 1 to 
  3 inches with localized amounts of 5 inches possible.

* WHERE: Winter storm warning for eastern Douglas County Foothills
  including Tiller Trail Highway. Winter Weather Advisory for
  Interstate 5 between Grants Pass and Roseburg. Interstate 5 from
  Ashland to Siskiyou Summit is also included in this advisory. 

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

  PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

CAZ080-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.NEW.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Western Siskiyou County-
Including the city of Fort Jones
358 PM PST Mon Dec 18 2017

...WINTER STORM WARNING ABOVE 2500 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow above 2500 feet expected. Snow above 2000 feet
  expected. Total snow accumulations above 2500 feet 6 to 8 inches 
  with localized amounts up to 10 inches are expected. Snow 
  accumulations above 2000 feet of 1 to 3 inches with localized 
  amounts of 5 inches possible.

* WHERE: Winter storm warning for Sawyers Bar Road between Etna 
  and Somes Bar. Winter Weather Advisory for other areas of 
  western Siskiyou County.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ024-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Eastern Curry County and Josephine County-
358 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Snow above 2000 feet expected. Total snow accumulations 
  of up to 7 inches, with localized amounts up to 16 inches, are 
  expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  not include Highway 199, but Highway 199 at Hayes Hill and the 
  state line may see some snow.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 10 PM Tuesday and 4 AM Wednesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions. Look 
  for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ081>083-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka and Tennant
358 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Snow above 2000 feet expected. Total snow accumulations 
  of 2 to 6 inches, with localized amounts up to 8 inches, are 
  expected.

* WINDS: Southwest 20 to 30 with gusts to 50 mph.

* WHERE: Interstate 5 from Siskiyou Summit to Weed. Portions of 
  highway 89 at Snowmans Summit as well as the Klamath River 
  Valley.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute on Tuesday. Blowing snow
  could really limit visibilities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ084-085-ORZ031-191400-
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
358 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Snow above 2000 feet expected. Total snow accumulations 
  of 2 to 4 inches, with localized amounts up to 8 inches, are 
  expected.

* WHERE: In California, Northeast Siskiyou and Modoc Counties. 
  This includes portions of Highways 90 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140. 

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 10 PM Tuesday and 4 AM Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$
6 follow-up statements
581 
WWUS46 KMFR 190128 CCA
WSWMFR

URGENT - WINTER WEATHER MESSAGE...CORRECTED
National Weather Service Medford OR
528 PM PST Mon Dec 18 2017

ORZ029-030-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.COR.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.COR.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Chemult, 
Crescent, and Gilchrist
528 PM PST Mon Dec 18 2017

...WINTER STORM WARNING IN EFFECT FROM 1 PM TUESDAY TO 7 AM PST 
WEDNESDAY... 
...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY...

* WHAT: Warning level accumulations of 4 to 8 inches, with
  localized amounts up to 10 inches expected. Advisory snow 
  accumulations of 2 to 4 inches, with localized amounts up to 6 
  inches expected.

* WHERE: The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAIL: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ027-028-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.COR.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.COR.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
528 PM PST Mon Dec 18 2017

...WINTER STORM WARNING IN EFFECT FROM 1 PM TUESDAY TO 7 AM PST 
WEDNESDAY... 
...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY...

* WHAT: Winter storm warning accumulations in the Cascades of 12 
  to 18 inches with localized amounts up to 20 inches expected. 
  Winter weather advisory accumulations of 3 to 6 inches with 
  localized amounts up to 9 inches expected.

* WHERE: Winter Storm Warning for most of the Cascades, Highways 
  62 and 138 from Union Creek to near Crater Lake and Diamond 
  Lake. Additionally, highway 140 between White City and Klamath 
  Falls. Winter Weather Advisory for Interstate 5 at Siskiyou 
  Summit and Highway 66.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ023-025-026-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.NEW.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
528 PM PST Mon Dec 18 2017

...WINTER STORM WARNING IN EFFECT ABOVE 2500 FEET FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow above 2500 feet expected. Light to moderate
  snow above 2000 feet expected. Total snow accumulations above
  2500 feet 3 to 6 inches inches with localized amounts up to 10 
  inches are expected. Snow accumulations above 2000 feet of 1 to 
  3 inches with localized amounts of 5 inches possible.

* WHERE: Winter storm warning for eastern Douglas County Foothills
  including Tiller Trail Highway. Winter Weather Advisory for
  Interstate 5 between Grants Pass and Roseburg. Interstate 5 from
  Ashland to Siskiyou Summit is also included in this advisory. 

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

  PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

CAZ080-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.COR.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
/O.COR.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
Western Siskiyou County-
Including the city of Fort Jones
528 PM PST Mon Dec 18 2017

...WINTER STORM WARNING FEET IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY... 
...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY...

* WHAT: Warning amounts 6 to 10 inches with local amounts up to 14
  inches are expected. Advisory amounts 1 to 3 inches with 
  localized amounts of 5 inches possible.

* WHERE: Winter storm warning for Sawyers Bar Road between Etna
  and Somes Bar to include Etna Summit. Winter Weather Advisory
  for lower elevations of western Siskiyou County to include Etna
  and Fort Jones.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions, 
  including during the evening commute on Tuesday. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ024-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.COR.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Eastern Curry County and Josephine County-
528 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Snow expected generally above 2000 feet. Total snow
  accumulations of up to 7 inches, with localized amounts up to 16
  inches, are expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  not include Highway 199, but Highway 199 at Hayes Hill and the
  state line will see 1 to 3 inches.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 10 PM Tuesday and 4 AM Wednesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions. Look 
  for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ081>083-191400-
/O.UPG.KMFR.WS.A.0016.171220T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka and Tennant
528 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY ABOVE 2000 FEET IN EFFECT FROM 1 PM 
TUESDAY TO 7 AM PST WEDNESDAY...

* WHAT: Snow above 2000 feet expected. Total snow accumulations 
  of 2 to 6 inches, with localized amounts up to 8 inches, are 
  expected.

* WINDS: Southwest 20 to 30 with gusts to 50 mph.

* WHERE: Interstate 5 from Siskiyou Summit to Weed. Portions of 
  highway 89 at Snowmans Summit as well as the Klamath River 
  Valley.

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 4 PM and 10 PM Tuesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute on Tuesday. Blowing snow
  could really limit visibilities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ084-085-ORZ031-191400-
/O.COR.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
528 PM PST Mon Dec 18 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY...

* WHAT: Total snow accumulations of 2 to 4 inches, with localized
  amounts up to 8 inches, are expected.

* WHERE: In California, Northeast Siskiyou and Modoc Counties. 
  This includes portions of Highways 90 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140. 

* WHEN: 1 PM Tuesday to 7 AM Wednesday. The heaviest snowfall 
  rates will occur between 10 PM Tuesday and 4 AM Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$
065 
WWUS46 KMFR 191103
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
303 AM PST Tue Dec 19 2017

ORZ029-030-200030-
/O.CON.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Chemult, 
Crescent, and Gilchrist
303 AM PST Tue Dec 19 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 AM PST WEDNESDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Warning level accumulations of 4 to 8 inches, with
  localized amounts up to 10 inches expected. Advisory snow 
  accumulations of 2 to 4 inches, with localized amounts up to 6 
  inches expected.

* WHERE: The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 4 PM this afternoon and 10 PM
  this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute today. Look for significant
  reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ027-028-200030-
/O.CON.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
303 AM PST Tue Dec 19 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 AM PST WEDNESDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Winter storm warning accumulations in the Cascades of 12 
  to 18 inches with localized amounts up to 20 inches expected. 
  Winter weather advisory accumulations of 3 to 6 inches with 
  localized amounts up to 9 inches expected.

* WHERE: Winter Storm Warning for most of the Cascades, Highways 
  62 and 138 from Union Creek to near Crater Lake and Diamond 
  Lake. Additionally, highway 140 between White City and Klamath 
  Falls. Winter Weather Advisory for Interstate 5 at Siskiyou 
  Summit and Highway 66.

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 4 PM this afternoon and 10 PM
  this evening.

* ADDITIONAL DETAILS: Plan on difficult travel conditions,
  including during the evening commute today. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

ORZ023-025-026-200030-
/O.CON.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
303 AM PST Tue Dec 19 2017

...WINTER STORM WARNING REMAINS IN EFFECT ABOVE 2500 FEET FROM 1 
PM THIS AFTERNOON TO 7 AM PST WEDNESDAY... 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT ABOVE 2000 FEET FROM
1 PM THIS AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Heavy snow above 2500 feet expected. Light to moderate
  snow above 2000 feet expected. Total snow accumulations above
  2500 feet 3 to 6 inches inches with localized amounts up to 10 
  inches are expected. Snow accumulations above 2000 feet of 1 to 
  3 inches with localized amounts of 5 inches possible.

* WHERE: Winter storm warning for eastern Douglas County Foothills
  including Tiller Trail Highway. Winter Weather Advisory for
  Interstate 5 between Grants Pass and Roseburg. Interstate 5 from
  Ashland to Siskiyou Summit is also included in this advisory. 

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 4 PM this afternoon and 10 PM
  this evening.

* ADDITIONAL DETAILS: Plan on difficult travel conditions,
  including during the evening commute on today. Look for 
  significant reductions in visibility at times.

  PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

CAZ080-200030-
/O.CON.KMFR.WS.W.0018.171219T2100Z-171220T1500Z/
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Western Siskiyou County-
Including the city of Fort Jones
303 AM PST Tue Dec 19 2017

...WINTER STORM WARNING FEET IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY... 
...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 7 AM 
PST WEDNESDAY...

* WHAT: Warning amounts 6 to 10 inches with local amounts up to 14
  inches are expected. Advisory amounts 1 to 3 inches with 
  localized amounts of 5 inches possible.

* WHERE: Winter storm warning for Sawyers Bar Road between Etna
  and Somes Bar to include Etna Summit. Winter Weather Advisory
  for lower elevations of western Siskiyou County to include Etna
  and Fort Jones.

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 4 PM this afternoon and 10 PM
  this evening.

* ADDITIONAL DETAILS: Plan on difficult travel conditions,
  including during the evening commute on today. Look for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  likely and poses a threat to life and property. Take protective
  action now.

&&

$$

CAZ084-085-ORZ031-200030-
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
303 AM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Total snow accumulations of 2 to 4 inches, with localized
  amounts up to 8 inches, are expected.

* WHERE: In California, Northeast Siskiyou and Modoc Counties.
  This includes portions of Highways 299 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140. 

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 10 PM this evening and 4 AM 
  Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

ORZ024-200030-
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Eastern Curry County and Josephine County-
Including the city of Cave Junction
303 AM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY ABOVE 200O FEET REMAINS IN EFFECT FROM
1 PM THIS AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Snow expected generally above 2000 feet. Total snow
  accumulations of up to 7 inches, with localized amounts up to 16
  inches, are expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  include Highway 199 between Hayes Hill and the California state
  line for 1 to 3 inches.

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 10 PM this evening and 4 AM 
  Wednesday.

* ADDITIONAL DETAILS: Plan on difficult travel conditions. Look 
  for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.


&&

$$

CAZ081>083-200030-
/O.CON.KMFR.WW.Y.0040.171219T2100Z-171220T1500Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka and Tennant
303 AM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT ABOVE 2000 FEET FROM
1 PM THIS AFTERNOON TO 7 AM PST WEDNESDAY...

* WHAT: Snow above 2000 feet expected. Total snow accumulations 
  of 2 to 6 inches, with localized amounts up to 8 inches, are 
  expected.

* WINDS: Southwest 20 to 30 with gusts to 50 mph.

* WHERE: Interstate 5 from Siskiyou Summit to Weed. Portions of 
  highway 89 at Snowmans Summit as well as the Klamath River 
  Valley.

* WHEN: 1 PM this afternoon to 7 AM Wednesday. The heaviest
  snowfall rates will occur between 4 PM this afternoon and 10 PM
  this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute on Tuesday. Blowing snow
  could really limit visibilities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$
152 
WWUS46 KMFR 192354
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
354 PM PST Tue Dec 19 2017


ORZ029-030-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0000Z-171220T1800Z/
/O.EXT.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Beatty, Bly, 
Chemult, Crescent, Gilchrist, and Sprague River
354 PM PST Tue Dec 19 2017

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST WEDNESDAY...
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST WEDNESDAY...

* WHAT...Warning level accumulations of 4 to 8 inches with
  localized amounts up to 10 inches expected in the warning area.
  Advisory snow accumulations of 2 to 4 inches, with localized
  amounts up to 6 inches expected in the advisory area.

* WHERE...The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN...Until 10 AM Wednesday. The heaviest snowfall rates will
  occur between 4 PM this afternoon and 10 PM this evening.

* ADDITIONAL DETAILS...Snow levels are expected to fall from near
  4300 feet this afternoon to 3900 feet early this evening, and
  then to all elevations overnight. Therefore, the evening commute
  is expected to be affected in many areas, including Klamath
  Falls. Look for significant reductions in visibility at times
  and beware of snow accumulations on area roadways. See the
  detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged in the warning area overnight 
  into Wednesday morning because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  expected and will pose a threat to life and property. Take 
  protective action now.

&&

$$

ORZ023-025-026-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0300Z-171220T1800Z/
/O.EXT.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
Including the cities of Glendale, Steamboat, Toketee Falls,
Phoenix, Talent, and Ashland
354 PM PST Tue Dec 19 2017

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST WEDNESDAY...
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
10 AM PST WEDNESDAY...

* WHAT...Heavy snow is expected above 2500 feet, and light to
  moderate snow is expected above 1500 feet tonight through
  Wednesday morning. Total snow accumulations above 2500 feet of 3
  to 6 inches are expected, with localized amounts up to 10
  inches. Snow accumulations of 1 to 3 inches with localized
  amounts of 5 inches expected above 1500 feet, especially along 
  the hillsides of the valleys.

* WHERE...Central Douglas County, Eastern Douglas County 
  Foothills and Jackson County.

* WHEN...Until 10 AM Wednesday for the Winter Storm Warning. The
  Winter Weather Advisory will go into effect at 7 PM PST this
  evening and is in effect until 10 AM PST Wednesday morning. The
  heaviest snowfall rates will occur between 10 PM this evening 
  and 4 AM Wednesday. A secondary round of potentially intense 
  snow showers are expected between 4 AM and 8 am PST Wednesday 
  morning. 

* ADDITIONAL DETAILS...Plan on difficult travel conditions
  developing this evening above 2500 feet, including during the
  evening commute. Travel is expected to become slippery below
  2500 feet overnight into Wednesday morning. Also, beware of
  significant reductions in visibility during periods of snowfall.
  See the detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions
  in the warning area.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  expected and will pose a threat to life and property. Take 
  protective action now.

&&

$$

CAZ080-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0300Z-171220T1800Z/
/O.EXT.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
Western Siskiyou County-
Including the city of Fort Jones
354 PM PST Tue Dec 19 2017

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST WEDNESDAY
above 4000 feet... 
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 10
AM PST WEDNESDAY...

* WHAT...6 to 12 inches with localized amounts up to 20 inches are
  above 4000 feet in the Marble and Siskiyou Mountains. 2 to 5
  inches are expected in the advisory area.

* WHERE...Most of Western Siskiyou County, except elevations below
  1500 feet.

* WHEN...For the Winter Storm Warning, until 10 AM Wednesday. 
  The heaviest snowfall rates will occur between 4 PM and 10 PM 
  this afternoon. For the Winter Weather Advisory, 7 PM to 10 AM 
  Wednesday. The heaviest snowfall rates will occur between 7 PM 
  and 10 PM this evening.

* ADDITIONAL DETAILS...Travel is expected to become slippery
  overnight into Wednesday morning. Also, beware of significant
  reductions in visibility during periods of snowfall. See the
  detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  expected and poses a threat to life and property. Take 
  protective action now.

&&

$$

CAZ084-085-ORZ031-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0000Z-171220T1800Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
354 PM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY IN EFFECT 4 PM PST THIS AFTERNOON UNTIL
10 AM PST WEDNESDAY...

* WHAT: Total snow accumulations of 2 to 4 inches, with localized
  amounts up to 8 inches, are expected.

* WHERE...n California, Northeast Siskiyou and Modoc Counties.
  This includes portions of Highways 299 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140.

* WHEN...4 PM to 10 AM Wednesday. The heaviest snowfall rates 
  will occur between 10 PM this evening and 4 AM Wednesday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times. See the detailed hazard graphic 
  at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

ORZ024-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0300Z-171220T1800Z/
Eastern Curry County and Josephine County-
354 PM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
10 AM PST WEDNESDAY...

* WHAT: Snow expected generally above 2000 feet. Total snow
  accumulations of up to 7 inches, with localized amounts up to 16
  inches, are expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  include Highway 199 between Hayes Hill and the California state
  line for 1 to 3 inches.

* WHEN...7 PM to 10 AM Wednesday. The heaviest snowfall rates 
  will occur between 10 PM this evening and 4 AM Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Look
  for reduced visibilities at times. See the detailed hazard 
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ081>083-201800-
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
/O.NEW.KMFR.WW.Y.0041.171220T0300Z-171220T1800Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka, Mccloud, and Tennant
354 PM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
10 AM PST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 7 inches
  are expected.

* WHERE...Central Siskiyou County, South Central Siskiyou County
  and North Central and Southeast Siskiyou County including most
  of the Shasta Valley. Much of Interstate 5 from Siskiyou Summit
  to Weed. Portions of highway 89 at Snowmans Summit as well as 
  the Klamath River Valley.

* WHEN...7 PM to 10 AM Wednesday. The heaviest snowfall rates 
  will occur between 7 PM and 10 PM this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.  See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

ORZ027-028-201800-
/O.EXT.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.EXT.KMFR.WW.Y.0040.000000T0000Z-171220T1800Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
354 PM PST Tue Dec 19 2017

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST WEDNESDAY...
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 10 AM PST
WEDNESDAY...

* WHAT: Winter storm warning accumulations in the Cascades of 12 
  to 18 inches with localized amounts up to 20 inches expected. 
  Winter weather advisory accumulations of 3 to 6 inches with 
  localized amounts up to 9 inches expected.

* WHERE: Winter Storm Warning for most of the Cascades, Highways 
  62 and 138 from Union Creek to near Crater Lake and Diamond 
  Lake. Additionally, highway 140 between White City and Klamath 
  Falls. Winter Weather Advisory for Interstate 5 at Siskiyou 
  Summit and Highway 66.

* WHEN...Until 10 AM Wednesday. The heaviest snowfall rates will
  occur between 4 PM and 10 PM this afternoon into this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute today. Look for significant
  reductions in visibility at times. See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring and poses a threat to life and property. Take 
  protective action now.

&&

$$

ORZ021-022-201500-
/O.EXB.KMFR.WW.Y.0040.171220T0300Z-171220T1500Z/
South Central Oregon Coast-Curry County Coast-
354 PM PST Tue Dec 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FOR ELEVATIONS ABOVE 1500
FEET FROM 7 PM THIS EVENING TO 7 AM PST WEDNESDAY...

* WHAT...Wet snow expected. Plan on slippery road conditions.
  Total wet snow accumulations of 1 to 4 inches are expected.

* WHERE...The Coastal Mountains of South Central Oregon Coast and
  Curry County Coast.

* WHEN...7 PM to 7 AM Wednesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute today. Look for significant
  reductions in visibility at times. See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

BTL
945 
WWUS46 KMFR 201214
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
414 AM PST Wed Dec 20 2017

ORZ029-030-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Beatty, Bly, 
Chemult, Crescent, Gilchrist, and Sprague River
414 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Warning level accumulations of 4 to 8 inches with 
  localized amounts up to 10 inches expected in the warning area. 
  Advisory snow accumulations of 2 to 4 inches, with localized 
  amounts up to 6 inches expected in the advisory area.

* WHERE...The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Snow levels are expected to fall from near
  4300 feet this afternoon to 3900 feet early this evening, and
  then to all elevations overnight. Therefore, the evening commute
  is expected to be affected in many areas, including Klamath
  Falls. Look for significant reductions in visibility at times
  and beware of snow accumulations on area roadways. See the
  detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring, and poses a threat to life and property. Take 
  protective action now.

&&

$$

ORZ027-028-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0040.000000T0000Z-171220T1800Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
414 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Winter storm warning accumulations in the Cascades of 12
  to 18 inches with localized amounts up to 20 inches expected.
  Winter weather advisory accumulations of 3 to 6 inches with
  localized amounts up to 9 inches expected.

* WHERE...Winter Storm Warning for most of the Cascades, Highways
  62 and 138 from Union Creek to near Crater Lake and Diamond
  Lake. Additionally, highway 140 between White City and Klamath
  Falls. Winter Weather Advisory for Interstate 5 at Siskiyou
  Summit and Highway 66.

* WHEN...Until 10 AM this morning.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the evening commute today. Look for significant
  reductions in visibility at times. See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is occurring,
  and poses a threat to life and property. Take protective action
  now.

&&

$$

ORZ023-025-026-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
Including the cities of Glendale, Steamboat, Toketee Falls, 
and Ashland
414 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 1500 FEET...

* WHAT...Heavy snow is expected above 2500 feet, and light to
  moderate snow is expected above 1500 feet through this morning.
  Total snow accumulations above 2500 feet of 3 to 6 inches are 
  expected, with localized amounts up to 10 inches. Snow 
  accumulations of 1 to 3 inches with localized amounts of 5 
  inches expected above 1500 feet, especially along the hillsides 
  of the valleys.

* WHERE...Central Douglas County, Eastern Douglas County 
  Foothills and Jackson County.

* WHEN...Until 10 AM today. A secondary round of potentially
  intense snow showers are expected until 8 am this morning. 

* ADDITIONAL DETAILS...Plan on difficult travel conditions above
  2500 feet during the morning commute. Also, beware of 
  significant reductions in visibility during periods of snowfall.
  See the detailed hazard graphic at 
  www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions
  in the warning area.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring and will pose a threat to life and property. Take 
  protective action now.

&&

$$

CAZ080-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Western Siskiyou County-
Including the city of Fort Jones
414 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...6 to 12 inches with localized amounts up to 20 inches are
  above 4000 feet in the Marble and Siskiyou Mountains. 2 to 5
  inches are expected in the advisory area.

* WHERE...Most of Western Siskiyou County, except elevations below
  1500 feet.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Travel is expected to become slippery
  overnight into this morning. Also, beware of significant 
  reductions in visibility during periods of snowfall. See the 
  detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring and poses a threat to life and property. Take 
  protective action now.

&&

$$

ORZ021-022-201500-
/O.CON.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
South Central Oregon Coast-Curry County Coast-
414 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR ELEVATIONS ABOVE
1500 FEET UNTIL 7 AM PST THIS MORNING...

* WHAT...Wet snow expected. Plan on slippery road conditions.
  Total wet snow accumulations of 1 to 4 inches are expected.

* WHERE...The Coastal Mountains of South Central Oregon Coast and
  Curry County Coast.

* WHEN...Until 7 AM this morning.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning travel today. Look for significant
  reductions in visibility at times. See the detailed hazard 
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ084-085-ORZ031-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
414 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Total snow accumulations of 2 to 4 inches, with localized
  amounts up to 8 inches, are expected.

* WHERE...In California, Northeast Siskiyou and Modoc Counties.
  This includes portions of Highways 299 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times. See the detailed hazard graphic 
  at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow
  will cause travel difficulties.

&&

$$

ORZ024-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Eastern Curry County and Josephine County-
414 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Snow expected generally above 2000 feet. Total snow
  accumulations of up to 7 inches, with localized amounts up to 10
  inches, are expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  include Highway 199 between Hayes Hill and the California state
  line for 1 to 3 inches.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Look
  for reduced visibilities at times. See the detailed hazard 
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ081>083-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka, Mccloud, and Tennant
414 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Total snow accumulations of 2 to 7 inches are expected.

* WHERE...Central Siskiyou County, South Central Siskiyou County
  and North Central and Southeast Siskiyou County including most
  of the Shasta Valley. Much of Interstate 5 from Siskiyou Summit
  to Weed. Portions of highway 89 at Snowmans Summit as well as 
  the Klamath River Valley.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.  See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$
268 
WWUS46 KMFR 201456
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
656 AM PST Wed Dec 20 2017


ORZ021-022-201600-
/O.EXP.KMFR.WW.Y.0040.000000T0000Z-171220T1500Z/
South Central Oregon Coast-Curry County Coast-
656 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY WILL EXPIRE AT 7 AM PST THIS MORNING...

* WHAT....Isolated snow showers will continue this morning above
  2000 feet. Additional accumulation will be less than an inch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

ORZ029-030-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Including the cities of Altamont, Klamath Falls, Beatty, Bly, 
Chemult, Crescent, Gilchrist, and Sprague River
656 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Warning level accumulations of 4 to 8 inches with 
  localized amounts up to 10 inches expected in the warning area. 
  Advisory snow accumulations of 2 to 4 inches, with localized 
  amounts up to 6 inches expected in the advisory area.

* WHERE...The Winter Storm Warning is for the Highway 97 between 
  Chiloquin and Crescent. The Winter Weather Advisory is for most 
  other areas of Klamath County including Highway 97 from 
  Chiloquin south to Klamath Falls, Highways 140 and 66, and 
  Klamath Falls.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...The morning commute is expected to be 
  affected in many areas, including Klamath Falls. Look for 
  significant reductions in visibility at times and beware of snow
  accumulations on area roadways. See the detailed hazard graphic
  at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring, and poses a threat to life and property. Take
  protective action now.

&&

$$

ORZ027-028-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0040.000000T0000Z-171220T1800Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
Including the cities of Crater Lake, Crescent Lake, Diamond Lake,
Union Creek, Howard Prairie, and Siskiyou Summit
656 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Winter storm warning accumulations in the Cascades of 12
  to 18 inches with localized amounts up to 20 inches expected.
  Winter weather advisory accumulations of 3 to 6 inches with
  localized amounts up to 9 inches expected.

* WHERE...Winter Storm Warning for most of the Cascades, Highways
  62 and 138 from Union Creek to near Crater Lake and Diamond
  Lake. Additionally, highway 140 between White City and Klamath
  Falls. Winter Weather Advisory for Interstate 5 at Siskiyou
  Summit and Highway 66.

* WHEN...Until 10 AM this morning.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Look 
  for significant reductions in visibility at times. See the 
  detailed hazard graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is occurring,
  and poses a threat to life and property. Take protective action
  now.

&&

$$

ORZ023-025-026-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Central Douglas County-Eastern Douglas County Foothills-
Jackson County-
Including the cities of Glendale, Steamboat, Toketee Falls, 
and Ashland
656 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2000 FEET...

* WHAT...Heavy snow is expected above 2500 feet, and light to
  moderate snow is expected above 1500 feet through this morning.
  Total snow accumulations above 2500 feet of 3 to 6 inches are 
  expected, with localized amounts up to 10 inches. Snow 
  accumulations of 1 to 3 inches with localized amounts of 5 
  inches expected above 1500 feet, especially along the hillsides 
  of the valleys.

* WHERE...Central Douglas County, Eastern Douglas County 
  Foothills and Jackson County.

* WHEN...Until 10 AM today. A secondary round of potentially
  intense snow showers are expected until 8 am this morning. 

* ADDITIONAL DETAILS...Plan on difficult travel conditions above
  2500 feet during the morning commute. Also, beware of
  significant reductions in visibility during periods of snowfall.
  See the detailed hazard graphic at  
  www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions
  in the warning area.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring and will pose a threat to life and property. Take 
  protective action now.

&&

$$

CAZ080-201800-
/O.CON.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Western Siskiyou County-
Including the city of Fort Jones
656 AM PST Wed Dec 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...6 to 12 inches with localized amounts up to 20 inches are
  above 4000 feet in the Marble and Siskiyou Mountains. 2 to 5
  inches are expected in the advisory area.

* WHERE...Most of Western Siskiyou County, except elevations below
  1500 feet.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Travel is expected to become slippery this
  morning. Also, beware of significant reductions in visibility 
  during periods of snowfall. See the detailed hazard graphic at 
  www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Travel is strongly discouraged because of dangerous conditions.

* If you must travel, keep tire chains, a flashlight, blankets, 
  food, water, medications, and a fully charged phone with you.

* The safest place during a winter storm is indoors.

* A Winter Storm Warning means that severe winter weather is
  occurring and poses a threat to life and property. Take
  protective action now.

&&

$$

CAZ084-085-ORZ031-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Central and Eastern Lake County-
Including the cities of Dorris, Alturas, Canby, Likely, Lakeview,
and Valley Falls
656 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Total snow accumulations of 2 to 4 inches, with localized
  amounts up to 8 inches, are expected.

* WHERE...In California, Northeast Siskiyou and Modoc Counties.
  This includes portions of Highways 299 and 139. In Oregon, 
  Central and Eastern Lake County. This includes Lakeview, Highway
  139, and Highway 140.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times. See the detailed hazard graphic 
  at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow
  will cause travel difficulties.

&&

$$

ORZ024-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Eastern Curry County and Josephine County-
656 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Snow expected generally above 2000 feet. Total snow
  accumulations of up to 7 inches, with localized amounts up to 10
  inches, are expected.

* WHERE: Portions of Josephine and eastern Curry County. This does
  include Highway 199 between Hayes Hill and the California state
  line for 1 to 3 inches.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Look
  for reduced visibilities at times. See the detailed hazard 
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$

CAZ081>083-201800-
/O.CON.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Including the cities of Yreka, Mccloud, and Tennant
656 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Total snow accumulations of 2 to 7 inches are expected.

* WHERE...Central Siskiyou County, South Central Siskiyou County
  and North Central and Southeast Siskiyou County including most
  of the Shasta Valley. Much of Interstate 5 from Siskiyou Summit
  to Weed. Portions of highway 89 at Snowmans Summit as well as 
  the Klamath River Valley.

* WHEN...Until 10 AM this morning. 

* ADDITIONAL DETAILS...Plan on slippery road conditions. Look for
  reduced visibilities at times.  See the detailed hazard
  graphic at www.wrh.noaa.gov/map/?wfo=mfr

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* Slow down and allow extra time to reach your destination.

* Carry tire chains and be prepared for snow covered roads and 
  limited visibilities.

* See https://www.tripcheck.com for latest road conditions.

* A Winter Weather Advisory for snow means that periods of snow 
  will cause travel difficulties.

&&

$$
453 
WWUS46 KMFR 201712
WSWMFR

URGENT - WINTER WEATHER MESSAGE
National Weather Service Medford OR
912 AM PST Wed Dec 20 2017


CAZ080-ORZ023-025-026-029-030-201815-
/O.CAN.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CAN.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Western Siskiyou County-Central Douglas County-
Eastern Douglas County Foothills-Jackson County-Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
912 AM PST Wed Dec 20 2017

...WINTER STORM WARNING IS CANCELLED...
...WINTER WEATHER ADVISORY IS CANCELLED...

* REASONING...Light snow showers are expected today as the snow
  levels fluctuates between 1500 and 2500 feet. Little or no snow
  accumulation is expected, though localized amounts up to one
  inch are possible.

&&

$$

ORZ027-028-201815-
/O.CAN.KMFR.WS.W.0018.000000T0000Z-171220T1800Z/
/O.CAN.KMFR.WW.Y.0040.000000T0000Z-171220T1800Z/
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-
912 AM PST Wed Dec 20 2017

...WINTER STORM WARNING IS CANCELLED...
...WINTER WEATHER ADVISORY IS CANCELLED...

* REASONING...Light to moderate snow showers are expected today.
  Additional accumulations are expected to be 2 inches or less.

&&

$$

CAZ081>085-ORZ024-031-201815-
/O.CAN.KMFR.WW.Y.0041.000000T0000Z-171220T1800Z/
Central Siskiyou County-South Central Siskiyou County-
North Central and Southeast Siskiyou County-
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Eastern Curry County and Josephine County-
Central and Eastern Lake County-
912 AM PST Wed Dec 20 2017

...WINTER WEATHER ADVISORY IS CANCELLED...

* REASONING...Light snow showers are expected today. Little or no
  snow accumulation is expected, though localized amounts up to 
  one inch are possible.

&&

$$

BTL

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Medford, OR wrote its last area forecast discussion before this winter storm warning went out at Dec 18, 9:08 AM PST, 6 hours 50 minutes earlier.

Area forecast discussion, Dec 18, 9:08 AM PST, 6 hours 50 minutes before
Area Forecast Discussion
National Weather Service Medford OR
908 AM PST Mon Dec 18 2017

.UPDATE...Current observations are indicating the current forecast
is on track. This will be the last day of high pressure before the
change in pattern occurs with rain and snow coming into the
Pacific Northwest. Today's forecast challenge will be determining
the timing and amounts as models still show some slight
differences. Have attached the previous discussion which details
the current thinking. -Schaaf

&&

.PREV DISCUSSION... /Issued 405 AM PST Mon Dec 18 2017/

DISCUSSION...

Fog and freezing fog has developed over the usual places this
morning in the Umpqua valley and near the Illinois valley in
Grants Pass. Clouds are making it really difficult for
visibilities to come crashing down in Medford, but we're currently
looking at 6SM here at the airport. Thinking that will continue
through the morning as the the clouds passing through should
mess with the inversion meeting complete saturation.

The other topic for this morning is the winter storm system for
Tuesday evening into Wednesday. The biggest concerns are...

* Low level snow with snow levels roughly around 2000 feet ahead
  and behind of frontal passage.

* Travel issues over the higher passes, specifically the Cascade
  passes.

* Possibly some minor travel issues over I-5. With snow levels
  around 2000 feet, some snow should fall over the lower passes.

The bulk of the snow fall should occur along the front around 3z
Wednesday to about 12 Z Wednesday. The sustained west flow up onto
the Cascades later in the morning will keep the snow falling in
moderate amounts along the Cascades post frontal passage. Storm
total snow accumulations will be approaching up to 16 inches near
Crater Lake over a 24 hour time period ending at 0Z Thursday.
With a negatively tilted trough, this system will remain very
efficient at pulling in moisture ahead of the front. This will
result in higher than normal snow fall east of the Cascades. Snow
totals east of the Cascades will be roughly 4 to 8 inches with
localized areas reaching 10 inches near Chemult and Crescent along
Highway 97.

After that front passes, snow levels fall down close to the valley
floor in the Rogue Valley. With temperatures forecasted near
freezing in Medford, it seems reasonable that we'll see some post
frontal snow fall during the morning hours after 12z. With ground
temperatures above freezing, it's hard to see anything really
sticking to the roadways. However, accumulating snow on grassy
surfaces seems probable.

Wind is the other issue with this system moving through. 700 mb
wind flow increases ahead of the system around 00z Wednesday with
the models showing 65 to 80 knot winds on the east side. The
pressure gradient ahead of the front is suggesting a 9mb pressure
gradient between Redding and Medford. Therefore, we'll probably
see advisory level winds in the Shasta valley with gusts up to 40
mph there. East of the Cascades near Summer Lake, we're expecting
gusts up to 50 mph.  -Smith

AVIATION...18/12Z TAF CYCLE...Along the coast and over the coastal
waters...Areas of MVFR cigs will clear to VFR by this afternoon.
Areas of MVFR will return and rain will develop late this evening as
a strong cold front approaches the coast. West of the
Cascades...areas of MVFR/IFR cigs/vsbys in low clouds and fog in
valleys will clear to VFR by late morning. Low clouds and fog are
likely to form again during the evening and continue into early
Tuesday morning. The remainder of the area will remain VFR through
tonight. From the Cascades east...VFR conditions will prevail
through tonight. -DW

MARINE...Updated 300 AM PST Monday 18 Dec 2017...Weak high
pressure today will be followed by increasing southerly winds
tonight ahead of a strong cold front. The front will move through
the waters Tuesday with gales and high and very steep seas. High and
steep swell with gusty westerly winds will follow Tuesday night into
Wednesday night. Winds will turn north Wednesday night and persist
into the weekend with gradually diminishing seas. -DW

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Air Stagnation Advisory until 8 AM PST Tuesday for ORZ029>031.
     High Wind Watch from Tuesday morning through late Tuesday night
     for ORZ030-031.
     Winter Storm Watch from Tuesday afternoon through Wednesday
     morning for ORZ029-030.
     Air Stagnation Advisory until 8 AM PST Tuesday for
     ORZ023-024-026.
     Winter Storm Watch from Tuesday afternoon through Wednesday
     morning for ORZ023>026.
     Winter Storm Watch from Tuesday afternoon through Wednesday
     morning for ORZ027-028.

CA...High Wind Watch from Tuesday morning through late Tuesday night
     for CAZ085.
     Winter Storm Watch from Tuesday afternoon through Wednesday
     morning for CAZ080>083.

Pacific Coastal Waters...Small Craft Advisory from 4 AM to 4 PM PST Tuesday for
     PZZ350-356-376.
     Gale Warning from 7 AM to 4 PM PST Tuesday for
     PZZ350-356-370-376.
     Small Craft Advisory from 1 AM to 7 AM PST Tuesday for PZZ370.

BMS/CZS/DW

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 17, 9:36 PM PSTHigh Wind WatchMFRKlamath, Lake18 hr
Dec 18, 4:12 AM PSTGale WarningMFR36 hr
Dec 18, 4:12 AM PSTSmall Craft AdvisoryMFR36 hr
Dec 18, 3:11 PM PSTHigh Wind WarningMFRCoos, Curry, Douglas, Lake37 hr
Dec 18, 3:11 PM PSTWind AdvisoryMFRKlamath, Lake37 hr
Dec 18, 3:13 PM PSTHazardous Seas WarningMFR49 hr
Dec 18, 3:58 PM PSTWinter Weather AdvisoryMFRCoos, Curry, Douglas, Jackson, Josephine, Klamath and 1 more41 hr

Nearby

Winter Storm Warnings in Oregon, 2017Winter Storm Warnings in California, 2017Every winter storm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.