Alert archive / Oregon / Freeze Warnings in 2011
Freeze Warning 35, NWS Medford, OR
NWS Medford, OR issued this freeze warning at Dec 13, 2011, 2:08 PM PST for Coos County, Curry County, Douglas County, Oregon. It took effect at Dec 14, 2011, 12:00 AM PST. It was in force for 8 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 13, 2011, 2:08 PM PST (22:08 UTC)
- In effect from
- Dec 14, 2011, 12:00 AM PST
- Expired
- Dec 14, 2011, 8:00 AM PST
- In force
- 8 hr
- Issued by
- NWS Medford, OR
Counties Coos County, OR, Curry County, OR, Douglas County, OR
The radar
The Medford radar (KMAX), 135 km from the middle of the area, began a volume at 22:14 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, 10.1 hours before the alert went out and 108 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
312 WWUS76 KMFR 132208 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 208 PM PST TUE DEC 13 2011 ORZ021-141600- /O.UPG.KMFR.FZ.A.0027.111214T0800Z-111214T1600Z/ /O.NEW.KMFR.FR.Y.0045.111214T0800Z-111214T1600Z/ /O.NEW.KMFR.FZ.W.0035.111214T0800Z-111214T1600Z/ SOUTH CENTRAL OREGON COAST- INCLUDING THE CITIES OF...COOS BAY...NORTH BEND...REEDSPORT... COQUILLE 208 PM PST TUE DEC 13 2011 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY... ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY. A FROST ADVISORY HAS ALSO BEEN ISSUED. THIS FROST ADVISORY IS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY. THE FREEZE WATCH IS NO LONGER IN EFFECT. * TEMPERATURES: BELOW FREEZING TEMPERATURES ARE EXPECTED WITH LOW TEMPERATURES BETWEEN 28 AND 32 DEGREES. SOME LOCATIONS...MAINLY NEAR THE BEACHES...WILL BE A LITTLE WARMER WITH LOW TEMPERATURES BETWEEN 33 AND 36 DEGREES. FROST IS EXPECTED IN THESE LOCATIONS. * LOCATIONS IN THE FREEZE WARNING INCLUDE: COOS BAY...NORTH BEND...COQUILLE...MYRTLE POINT AND POWERS. * LOCATIONS IN THE FROST ADVISORY INCLUDE: ALONG THE IMMEDIATE COAST AND AREAS FROM BANDON AND POWERS SOUTHWARD. * IMPACTS...SENSITIVE VEGETATION MAY BE DAMAGED OR KILLED IF NOT PROTECTED. PIPES COULD FREEZE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ ORZ022-141600- /O.NEW.KMFR.FR.Y.0045.111214T0800Z-111214T1600Z/ CURRY COUNTY COAST- INCLUDING THE CITY OF...GOLD BEACH 208 PM PST TUE DEC 13 2011 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PST WEDNESDAY. * TEMPERATURES: LOWS TEMPERATURES BETWEEN 33 AND 36 DEGREES ARE EXPECTED. * LOCATIONS INCLUDE: GOLD BEACH. * IMPACTS...SENSITIVE VEGETATION MAY BE DAMAGED OR KILLED IF NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ ORZ023>026-141600- /O.CON.KMFR.AS.Y.0004.000000T0000Z-111214T2000Z/ CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY- EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY- INCLUDING THE CITIES OF...ROSEBURG...SUTHERLIN...GREEN... GRANTS PASS...MEDFORD...ASHLAND 208 PM PST TUE DEC 13 2011 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST WEDNESDAY... AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST WEDNESDAY. * IMPACTS...AIR QUALITY WILL REMAIN DEGRADED THROUGH WEDNESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE. && $$ SPILDE
2 follow-up statements
497 WWUS76 KMFR 141111 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 311 AM PST WED DEC 14 2011 ORZ021-141600- /O.CON.KMFR.FZ.W.0035.000000T0000Z-111214T1600Z/ /O.CON.KMFR.FR.Y.0045.000000T0000Z-111214T1600Z/ SOUTH CENTRAL OREGON COAST- INCLUDING THE CITIES OF...COOS BAY...NORTH BEND...REEDSPORT... COQUILLE 311 AM PST WED DEC 14 2011 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... A FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING. A FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING. * TEMPERATURES: BELOW FREEZING TEMPERATURES ARE EXPECTED WITH LOW TEMPERATURES BETWEEN 28 AND 32 DEGREES. SOME LOCATIONS... MAINLY NEAR THE BEACHES...WILL BE A LITTLE WARMER WITH LOW TEMPERATURES BETWEEN 33 AND 36 DEGREES. FROST IS EXPECTED IN THESE LOCATIONS. * LOCATIONS IN THE FREEZE WARNING INCLUDE: COOS BAY...NORTH BEND...COQUILLE...MYRTLE POINT AND POWERS. * LOCATIONS IN THE FROST ADVISORY INCLUDE: ALONG THE IMMEDIATE COAST AND AREAS FROM BANDON AND POWERS SOUTHWARD. * IMPACTS...SENSITIVE VEGETATION MAY BE DAMAGED OR KILLED IF NOT PROTECTED. PIPES COULD FREEZE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ ORZ022-141600- /O.CON.KMFR.FR.Y.0045.000000T0000Z-111214T1600Z/ CURRY COUNTY COAST- 311 AM PST WED DEC 14 2011 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... A FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING. * TEMPERATURES: LOWS TEMPERATURES BETWEEN 33 AND 36 DEGREES ARE EXPECTED. * LOCATIONS INCLUDE: GOLD BEACH. * IMPACTS...SENSITIVE VEGETATION MAY BE DAMAGED OR KILLED IF NOT PROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ ORZ023>026-141915- /O.CON.KMFR.AS.Y.0004.000000T0000Z-111214T2000Z/ CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY- EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY- INCLUDING THE CITIES OF...ROSEBURG...SUTHERLIN...GREEN... GRANTS PASS...MEDFORD...ASHLAND 311 AM PST WED DEC 14 2011 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY... AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY. * IMPACTS...AIR QUALITY WILL REMAIN DEGRADED THROUGH WEDNESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE. && $$
451 WWUS76 KMFR 141557 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 757 AM PST WED DEC 14 2011 ORZ021-141700- /O.EXP.KMFR.FZ.W.0035.000000T0000Z-111214T1600Z/ /O.EXP.KMFR.FR.Y.0045.000000T0000Z-111214T1600Z/ SOUTH CENTRAL OREGON COAST- INCLUDING THE CITIES OF...COOS BAY...NORTH BEND...REEDSPORT... COQUILLE 757 AM PST WED DEC 14 2011 ...FREEZE WARNING WILL EXPIRE AT 8 AM PST THIS MORNING... ...FROST ADVISORY WILL EXPIRE AT 8 AM PST THIS MORNING... THE FREEZE WARNING WILL EXPIRE AT 8 AM PST THIS MORNING. THE FROST ADVISORY WILL EXPIRE AT 8 AM PST THIS MORNING. $$ ORZ022-141700- /O.EXP.KMFR.FR.Y.0045.000000T0000Z-111214T1600Z/ CURRY COUNTY COAST- 757 AM PST WED DEC 14 2011 ...FROST ADVISORY WILL EXPIRE AT 8 AM PST THIS MORNING... THE FROST ADVISORY WILL EXPIRE AT 8 AM PST THIS MORNING. $$ ORZ023>026-142000- /O.CON.KMFR.AS.Y.0004.000000T0000Z-111214T2000Z/ CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY- EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY- INCLUDING THE CITIES OF...ROSEBURG...SUTHERLIN...GREEN... GRANTS PASS...MEDFORD...ASHLAND 757 AM PST WED DEC 14 2011 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY... AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY. * IMPACTS...AIR QUALITY WILL REMAIN DEGRADED THROUGH WEDNESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE. && $$ SPILDE
What forecasters said that day
The local office's own words before this freeze 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 freeze warning went out at Dec 13, 9:03 AM PST, 5 hours 5 minutes earlier.
Area forecast discussion, Dec 13, 9:03 AM PST, 5 hours 5 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
903 AM PST TUE DEC 13 2011
.DISCUSSION...SATELLITE IMAGERY SHOWING PATCHY FOG INTO THE UMPQUA
BASIN AROUND ROSEBURG AND IN GRANTS PASS THIS MORNING...BUT NOT IN
THE ROGUE VALLEY. THE FORECAST WAS UPDATED EARLIER THIS MORNING TO
DECREASE THE COVERAGE OF FOG AND LOW CLOUDS OVER THE WEST SIDE
VALLEYS AND INCREASE TEMPERATURES A BIT WHERE MORE SUNSHINE IS
EXPECTED. A LARGER PERSISTENT AREA OF LOW CLOUDINESS HAS BEEN
TRAPPED BENEATH THE INVERSION OVER PORTIONS OF KLAMATH AND LAKE
COUNTIES...AND MAINTAINED THIS AREA INTO THE AFTERNOON. THERE
SHOULD BE SOME EROSION OF THIS CLOUD DECK THIS AFTERNOON BUT SOME
AREAS MAY STAY CLOUDY ALL DAY. LOWERED MAX TEMPERATURES A BIT IN
THESE AREAS TO ACCOUNT FOR THIS.
&&
.AVIATION...IFR CIGS AROUND KLMT THIS MORNING SHOULD ERODE AND
BECOME VFR BY THIS AFTERNOON...BUT MAY PERSIST MOST OF THE DAY IN
SOME LOCATIONS OF NORTHERN KLAMATH AND LAKE COUNTIES. IFR CIGS/VIS
WILL CONTINUE FOR THE NEXT COUPLE OF HOURS IN PORTIONS OF THE
UMPQUA BASIN AND AROUND GRANTS PASS...BUT THESE WILL CLEAR TO VFR
THIS AFTERNOON. KMFR AND KOTH WILL HAVE VFR ALL DAY.
&&
.PREV DISCUSSION... /ISSUED 407 AM PST TUE DEC 13 2011/
DISCUSSION...SATELLITE IMAGERY SHOWS EXTENSIVE LOW CLOUDS IN
KLAMATH AND LAKE COUNTIES AND PATCHY FOG IN THE UMPQUA BASIN. THE
AIR MASS IS DRIER THIS MORNING THAN ON MONDAY MORNING. HAVE PARED
DOWN FREEZING FOG COVERAGE THIS MORNING FOR THE WEST SIDE. AT THE
COAST TEMPERATURES ARE EXPECTED TO COME BELOW FREEZING IN COOS
COUNTY AGAIN TUESDAY NIGHT AND HAVE CONTINUED THE FREEZE WATCH
THERE.
WITH THE RIDGE STILL IN PLACE FOR TUESDAY NIGHT AND WEDNESDAY
EXPECT LITTLE CHANGE IN AIR MASS. HOWEVER LATEST MODEL RUNS ARE
STILL CONSISTENT WITH THE NEXT TROUGH MOVING ACROSS THE AREA
WEDNESDAY NIGHT. FORECAST SOUNDING ALSO SHOWS SLIGHTLY STRONGER
WINDS WEDNESDAY AFTERNOON. THE CURRENT THINKING IS THAT THIS AND
THE MORE UNSTABLE AIR MASS WITH THE TROUGH WILL PRODUCE ENOUGH
MIXING WEDNESDAY AFTERNOON AND THURSDAY.
FOR WEDNESDAY NIGHT THE TROUGH AND COLD FRONT APPROACHED THE COAST
WITH BOTH NAM AND GFS SHOWING PRECIPITATION INTO COOS COUNTY
AROUND MIDNIGHT WEDNESDAY. BOTH MODELS THEN DIVERGE WITH HOW THEY
BRING THE UPPER LEVEL SUPPORT ACROSS. THE 00Z GFS SHOWS MORE
SPLITTING AND TAKING MOST OF THE ENERGY INTO NORTHERN CALIFORNIA.
HOWEVER THE 06Z GFS WAS CLOSER TO THE NAM12 WHICH BROUGHT THE
UPPER LEVEL TROUGH ACROSS SOUTHWEST OREGON BEFORE DIGGING INTO
NORTHEAST CALIFORNIA. TIMING OF THE PRECIPITATION WILL BE
CRITICAL. SNOW LEVEL IS EXPECTED TO BE ABOVE THE MAJOR PASSES IN
THE EVENING. HOWEVER AS THE COLD AIR FILTERS INTO THE AREA EXPECT
GRADUAL DECREASE AND WE COULD SEE SNOW LEVEL LOWERING TO NEAR 2000
FEET TOWARD THURSDAY MORNING. MIXED RAIN AND SNOW IS POSSIBLE IN
THE ROGUE VALLEY AROUND DAY BREAK THURSDAY. WILL NEED TO MONITOR
THE TIMING WITH LATER MODEL RUN AND CHANGES IN PRECIPITATION
AMOUNT.
MEDIUM RANGE GUIDANCE SHOWS A BIG SPREAD BETWEEN THE GFS AND THE
ECMWF. DID NOT MAKE MAJOR ADJUSTMENTS TO THE EXTENDED GRIDS.
AVIATION...WITH DRIER AIR MASS THIS MORNING EXPECT LESS IFR
COVERAGE AND MOST TERMINALS WILL SEE MAINLY MVFR AROUND SUNRISE.
TO THE EAST IN KLAMATH AND LAKE COUNTIES TERRAIN WILL BE MOSTLY
OBSCURED DUE TO LOWER CLOUDS AND WIDESPREAD MVFR CIGS/VIS CAN BE
EXPECTED. MOUNTAINS WILL ALSO BE OBSCURED WITH LCL IFR CIGS. DOES
NOT LOOK LIKE CONDITIONS ON THE EAST SIDE WILL IMPROVE TO VFR
UNTIL MID AFTERNOON. VFR IS EXPECTED IN NORTHERN CALIFORNIA
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...FREEZE WATCH FROM LATE TONIGHT THROUGH WEDNESDAY MORNING FOR
ORZ021.
AIR STAGNATION ADVISORY UNTIL NOON PST WEDNESDAY FOR
ORZ023-024-026.
CA...NONE.
PZ...NONE.
SPILDEHazardous weather outlook, Dec 13, 9:58 AM PST, 4 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MEDFORD OR 958 AM PST TUE DEC 13 2011 ORZ021-022-131900- SOUTH CENTRAL OREGON COAST-CURRY COUNTY COAST- 958 AM PST TUE DEC 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST OREGON. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 13, 2:08 PM PST | Frost Advisory | MFR | Coos, Curry, Douglas | 18 hr |
Nearby
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.