Alert archive / Oregon / Storm Warnings in 2020
Storm Warning 4, NWS Medford, OR
NWS Medford, OR issued this storm warning at Nov 13, 2020, 2:31 PM PST. It took effect at Nov 14, 2020, 1:00 PM PST. It was in force for 15 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
- Nov 13, 2020, 2:31 PM PST (22:31 UTC)
- In effect from
- Nov 14, 2020, 1:00 PM PST
- Expired
- Nov 15, 2020, 4:00 AM PST
- In force
- 15 hr
- Issued by
- NWS Medford, OR
The text
As transmitted.
615 WHUS76 KMFR 132231 MWWMFR URGENT - MARINE WEATHER MESSAGE National Weather Service Medford OR 231 PM PST Fri Nov 13 2020 PZZ350-370-141145- /O.EXT.KMFR.SE.W.0059.000000T0000Z-201114T2100Z/ /O.UPG.KMFR.GL.A.0023.201114T1800Z-201115T0600Z/ /O.NEW.KMFR.SR.W.0004.201114T2100Z-201115T0600Z/ /O.NEW.KMFR.GL.W.0026.201114T2100Z-201115T0600Z/ /O.NEW.KMFR.SC.Y.0100.201115T0600Z-201116T1800Z/ Coastal waters from Florence to Cape Blanco OR out 10 nm- Waters from Florence to Cape Blanco OR from 10 to 60 nm- 231 PM PST Fri Nov 13 2020 ...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 1 PM PST SATURDAY... ...GALE WARNING IN EFFECT FROM 1 PM TO 10 PM PST SATURDAY... ...STORM WARNING IN EFFECT FROM 1 PM TO 10 PM PST SATURDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM SATURDAY TO 10 AM PST MONDAY... * WHAT...Very steep and hazardous seas 15 to 20 ft at 13 seconds through Saturday morning. Then, south winds 35 to 45 kt with storm force gusts up to 60 kt Saturday afternoon and evening. Saturday night through Monday, seas 12 to 16 ft at 15 seconds expected. * WHERE...Storm force wind gusts will cover areas north of Cape Blanco and 5 to 30 nm away from shore. Gale force winds will cover the other areas. Small craft conditions will cover all areas. * WHEN...For the Storm and Gale Warning, from 1 PM to 10 PM PST Saturday. For the Hazardous Seas Warning, until 1 PM PST Saturday. For the Small Craft Advisory, from 10 PM Saturday to 10 AM PST Monday. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities will be significantly reduced. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ PZZ356-376-141145- /O.EXT.KMFR.SE.W.0059.000000T0000Z-201114T2100Z/ /O.UPG.KMFR.GL.A.0023.201114T1800Z-201115T0600Z/ /O.NEW.KMFR.GL.W.0026.201114T2100Z-201115T0600Z/ /O.NEW.KMFR.SC.Y.0100.201115T0600Z-201116T1800Z/ Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm- Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm- 231 PM PST Fri Nov 13 2020 ...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 1 PM PST SATURDAY... ...GALE WARNING IN EFFECT FROM 1 PM TO 10 PM PST SATURDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM SATURDAY TO 10 AM PST MONDAY... * WHAT...Very steep and hazardous seas 14 to 16 ft at 13 seconds. For the Gale Warning, south winds 25 to 35 kt with gusts up to 45 kt and seas 16 to 18 ft at 15 seconds expected. Saturday night through Monday seas 12 to 16 ft at 15 seconds expected. * WHERE...Hazardous Seas, Gales and Small Craft Conditions will cover all the waters south of Cape Blanco and north of Pt. St. George. * WHEN...For the Gale Warning, from 1 PM to 10 PM PST Saturday. For the Hazardous Seas Warning, until 1 PM PST Saturday. For the Small Craft Advisory, from 10 PM Saturday to 10 AM PST Monday. * IMPACTS...Strong winds and very steep seas could capsize or damage vessels. Low visibility conditions are expected. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid strong winds and very steep seas. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions. && $$ Visit us at https://www.weather.gov/Medford
4 follow-up statements
002 WHUS76 KMFR 140408 MWWMFR URGENT - MARINE WEATHER MESSAGE National Weather Service Medford OR 808 PM PST Fri Nov 13 2020 PZZ356-376-141715- /O.CON.KMFR.SE.W.0059.000000T0000Z-201114T2100Z/ /O.EXB.KMFR.SR.W.0004.201114T2100Z-201115T0900Z/ /O.EXT.KMFR.GL.W.0026.201114T2100Z-201115T0900Z/ /O.EXT.KMFR.SC.Y.0100.201115T0900Z-201116T1800Z/ Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm- Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm- 808 PM PST Fri Nov 13 2020 ...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 1 PM PST SATURDAY... ...STORM WARNING IN EFFECT FROM 1 PM SATURDAY TO 1 AM PST SUNDAY... ...GALE WARNING NOW IN EFFECT FROM 1 PM SATURDAY TO 1 AM PST SUNDAY... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 1 AM SUNDAY TO 10 AM PST MONDAY... * WHAT...For the Storm warning, south winds 35 to 45 kt with storm force gusts up to 55 kt, and very steep and hazardous seas 17 to 18 ft at 8 seconds. For the Gale Warning, south winds 25 to 35 kt with gusts up to 45 kt and seas 16 to 18 ft at 8 seconds expected. Saturday night through Monday seas 12 to 16 ft at 15 seconds expected. * WHERE...For the Storm Warning, from Port Orford north, and 5 to 20 nm from shore. Hazardous Seas, Gales and Small Craft Conditions will cover all the waters south of Cape Blanco and north of Pt. St. George. * WHEN...For the Storm Warning, from 1 PM Saturday to 1 AM PST Sunday. For the Gale Warning, from 1 PM Saturday to 1 AM PST Sunday. For the Hazardous Seas Warning, until 1 PM PST Saturday. For the Small Craft Advisory, from 1 AM Sunday to 10 AM PST Monday. * IMPACTS...Strong winds and very steep seas could capsize or damage vessels. Low visibility conditions are expected. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ PZZ350-370-141715- /O.CON.KMFR.SE.W.0059.000000T0000Z-201114T2100Z/ /O.EXT.KMFR.GL.W.0026.201114T2100Z-201115T0900Z/ /O.EXT.KMFR.SR.W.0004.201114T2100Z-201115T0900Z/ /O.EXT.KMFR.SC.Y.0100.201115T0900Z-201116T1800Z/ Coastal waters from Florence to Cape Blanco OR out 10 nm- Waters from Florence to Cape Blanco OR from 10 to 60 nm- 808 PM PST Fri Nov 13 2020 ...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 1 PM PST SATURDAY... ...GALE WARNING NOW IN EFFECT FROM 1 PM SATURDAY TO 1 AM PST SUNDAY... ...STORM WARNING NOW IN EFFECT FROM 1 PM SATURDAY TO 1 AM PST SUNDAY... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 1 AM SUNDAY TO 10 AM PST MONDAY... * WHAT...Very steep and hazardous seas 15 to 20 ft at 13 seconds through Saturday morning. Then, south winds 35 to 45 kt with storm force gusts up to 60 kt Saturday afternoon and evening. Saturday night through Monday, seas 12 to 16 ft at 9 seconds expected. * WHERE...Storm force wind gusts will cover areas north of Cape Blanco and 5 to 40 nm away from shore. Gale force winds will cover the other areas. Small craft conditions will cover all areas. * WHEN...For the Storm Warning, from 1 PM Saturday to 1 AM PST Sunday. For the Hazardous Seas Warning, until 1 PM PST Saturday. For the Small Craft Advisory, from 1 AM Sunday to 10 AM PST Monday. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities will be significantly reduced. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ Visit us at https://www.weather.gov/Medford
862 WHUS76 KMFR 141129 MWWMFR URGENT - MARINE WEATHER MESSAGE National Weather Service Medford OR 329 AM PST Sat Nov 14 2020 PZZ350-356-370-376-150000- /O.CON.KMFR.SE.W.0059.000000T0000Z-201114T2100Z/ /O.EXT.KMFR.GL.W.0026.201114T2100Z-201115T1200Z/ /O.EXT.KMFR.SR.W.0004.201114T2100Z-201115T1200Z/ /O.EXT.KMFR.SC.Y.0100.201115T1200Z-201116T1800Z/ /O.NEW.KMFR.GL.A.0024.201116T1800Z-201117T1800Z/ Coastal waters from Florence to Cape Blanco OR out 10 nm- Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm- Waters from Florence to Cape Blanco OR from 10 to 60 nm- Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm- 329 AM PST Sat Nov 14 2020 ...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... ...GALE WARNING NOW IN EFFECT FROM 1 PM THIS AFTERNOON TO 4 AM PST SUNDAY... ...STORM WARNING NOW IN EFFECT FROM 1 PM THIS AFTERNOON TO 4 AM PST SUNDAY... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 4 AM SUNDAY TO 10 AM PST MONDAY... ...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH TUESDAY MORNING... * WHAT...For the Hazardous Seas Warning, very steep and hazardous seas 14 to 19 ft at 12 seconds. For the Gale Warning, south winds 35 to 45 kt with gusts 45 to 55 kt and seas 14 to 19 ft at 13 seconds expected. For the Storm Warning, south winds 45 to 50 kt with gusts up to 60 kt and seas 20 to 27 ft at 13 seconds expected. For the Small Craft Advisory, south winds 15 to 25 kt with gusts up to 30 kt and seas 11 to 18 ft at 14 seconds expected. For the Gale Watch, south winds 35 to 45 kt with gusts up to 50 kt and seas 15 to 25 ft at 12 seconds possible. * WHERE...The Hazardous Seas Warning is for all areas. The Gale Warning is for all areas except the Storm Warning area. The Storm Warning area is between 3 and 40 NM of the coast west of Port Orford northward. The Small Craft Advisory and Gale Warning are for the entire area. * WHEN...The Hazardous Seas Warning is in effect now until 1 PM PST this afternoon. The Gale and Storm warnings are in effect from 1 PM this afternoon to 4 AM PST Sunday. The Small Craft Advisory is in effect from 4 AM Sunday to 10 AM PST Monday. The Gale Watch is for Monday morning through Tuesday morning. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities will be significantly reduced. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ BTL Visit us at https://www.weather.gov/Medford
285 WHUS76 KMFR 142217 MWWMFR URGENT - MARINE WEATHER MESSAGE National Weather Service Medford OR 217 PM PST Sat Nov 14 2020 PZZ350-356-370-376-151130- /O.CON.KMFR.GL.W.0026.000000T0000Z-201115T1200Z/ /O.CON.KMFR.SR.W.0004.000000T0000Z-201115T1200Z/ /O.CON.KMFR.SC.Y.0100.201115T1200Z-201116T1800Z/ /O.CON.KMFR.GL.A.0024.201116T1800Z-201117T1800Z/ Coastal waters from Florence to Cape Blanco OR out 10 nm- Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm- Waters from Florence to Cape Blanco OR from 10 to 60 nm- Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm- 217 PM PST Sat Nov 14 2020 ...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY... ...STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM SUNDAY TO 10 AM PST MONDAY... ...GALE WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH TUESDAY MORNING... * WHAT...South gales of 35 to 45 kt with areas of storm force winds of 45 to 50 kt and gusts to 60 kt. Very steep and dangerous wind driven seas of 16 to 20 feet at 15 seconds are expected through tonight. Winds diminish to 15 to 25 kt early Sunday morning and seas ease some, but remain very steep and hazardous of 12 to 17 ft Sunday into Monday. Then, south gales of 35 to 45 kt with very steep and dangerous seas of 20 to 25 ft are possible Monday into Tuesday. * WHERE...Storm conditions are expected generally beyond 5 nm and within 30 nm of shore. Gales with very steep and dangerous wind driven seas are expected elsewhere through tonight. Then, conditions hazardous to small craft are expected across all areas Sunday into Monday. Then, gales will be possible across all areas Monday into Tuesday. * WHEN...For the Storm and Gale Warnings, until 4 AM PST Sunday. For the Small Craft Advisory, from 4 AM Sunday to 10 AM PST Monday. For the Gale Watch, from Monday morning through Tuesday morning. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities will be significantly reduced. Bar crossings will become especially hazardous. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ Visit us at https://www.weather.gov/Medford
636 WHUS76 KMFR 151220 MWWMFR URGENT - MARINE WEATHER MESSAGE National Weather Service Medford OR 420 AM PST Sun Nov 15 2020 PZZ370-376-160100- /O.EXP.KMFR.GL.W.0026.000000T0000Z-201115T1200Z/ /O.EXP.KMFR.SR.W.0004.000000T0000Z-201115T1200Z/ /O.UPG.KMFR.SC.Y.0100.000000T0000Z-201116T1800Z/ /O.NEW.KMFR.SE.W.0060.201115T1220Z-201115T1800Z/ /O.NEW.KMFR.SC.Y.0101.201115T1800Z-201116T1800Z/ /O.UPG.KMFR.GL.A.0024.201116T1800Z-201117T1800Z/ /O.NEW.KMFR.GL.W.0027.201116T1800Z-201118T0000Z/ /O.NEW.KMFR.SR.A.0001.201117T1200Z-201117T1800Z/ Waters from Florence to Cape Blanco OR from 10 to 60 nm- Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm- 420 AM PST Sun Nov 15 2020 ...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 10 AM PST THIS MORNING... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PST MONDAY... ...GALE WARNING IN EFFECT FROM 10 AM MONDAY TO 4 PM PST TUESDAY... ...STORM WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...For the Hazardous Seas Warning, very steep and hazardous seas 14 to 19 ft. For the Small Craft Advisory, southwest winds 15 to 25 kt and westerly seas 13 to 18 ft at a dominant period of 14 seconds. For the Gale Warning, south winds 30 to 40 kt with gusts 40 to as high as 55 kt and very steep southwesterly seas 12 to 22 ft expected. For the Storm Watch, south winds 40 to 50 kt with gusts to 60 kt and very steep southwesterly seas 20 to 25 ft possible. * WHERE...The Hazardous Seas Warning, the Small Craft Advisory and the Gale Warning are for all areas. The Storm Watch covers most of the area, except far southwestern and far northeastern portions. * WHEN...For the Hazardous Seas Warning, until 10 AM PST this morning. For the Small Craft Advisory, from 10 AM this morning to 10 AM PST Monday. For the Gale Warning, from 10 AM Monday to 4 PM PST Tuesday. For the Storm Watch, from late Monday night through Tuesday morning. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities may be significantly reduced. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ PZZ350-356-160100- /O.EXP.KMFR.GL.W.0026.000000T0000Z-201115T1200Z/ /O.EXP.KMFR.SR.W.0004.000000T0000Z-201115T1200Z/ /O.UPG.KMFR.SC.Y.0100.000000T0000Z-201116T1800Z/ /O.NEW.KMFR.SE.W.0060.201115T1220Z-201115T1800Z/ /O.NEW.KMFR.SC.Y.0101.201115T1800Z-201116T1800Z/ /O.EXT.KMFR.GL.A.0024.201116T1800Z-201118T0000Z/ /O.NEW.KMFR.SR.A.0001.201117T1200Z-201117T1800Z/ Coastal waters from Florence to Cape Blanco OR out 10 nm- Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm- 420 AM PST Sun Nov 15 2020 ..HAZARDOUS SEAS WARNING IN EFFECT UNTIL 10 AM PST THIS MORNING... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PST MONDAY... ...GALE WATCH NOW IN EFFECT FROM MONDAY MORNING THROUGH TUESDAY AFTERNOON... ...STORM WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...For the Hazardous Seas Warning, very steep and hazardous seas 14 to 19 ft. For the Small Craft Advisory, southwest winds 15 to 25 kt and westerly seas 12 to 18 ft at a dominant period of 14 seconds. For the Gale Watch, south winds 30 to 40 kt with gusts 40 to as high as 55 kt and very steep southwesterly seas 10 to 20 ft possible. For the Storm Watch, south winds 40 to 50 kt with gusts to 60 kt and very steep southwesterly seas 18 to 23 ft possible. * WHERE...The Hazardous Seas Warning, the Small Craft Advisory and the Gale Watch are for all areas. The Storm Watch covers portions of the area within 10 NM of the coast, particular;y areas beyond 3 NM of the coast west of Brookings northward to west of Cape Arago. * WHEN...For the Hazardous Seas Warning, until 10 AM PST this morning. For the Small Craft Advisory, from 10 AM this morning to 10 AM PST Monday. For the Gale Watch, from 10 AM Monday to 4 PM PST Tuesday. For the Storm Watch, from late Monday night through Tuesday morning. * IMPACTS...Very strong winds and very steep seas could capsize or damage vessels. Visibilities may be significantly reduced. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel for very strong winds and very steep and hazardous seas. && $$ BTL Visit us at https://www.weather.gov/Medford
What forecasters said that day
The local office's own words before this 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 storm warning went out at Nov 13, 9:51 AM PST, 4 hours 40 minutes earlier.
Area forecast discussion, Nov 13, 9:51 AM PST, 4 hours 40 minutes before
Area Forecast Discussion National Weather Service Medford OR 918 AM
PST Fri Nov 13 2020
.Updated marine discussion.
.DISCUSSION...A strong storm is pushing through the forecast
area this morning. High winds (58mph+) have been observed at the
coast and over the mountains and east of the Cascades. Winds should
diminish at the coast as the morning progresses. Pressures are
rising at the coast, indicative of the front passing through. Winds
will be gusty inland through much of the day. Snow levels have risen
some as warm air noses inland this morning ahead of the front, and
snow levels are about 5000 feet right now. Snow levels will fall
behind the front, and snow will impact the mountains and areas east
of the Cascades down to about 3000 feet late this afternoon and this
evening. A break in the steadier, heavier precipitation is expected
late into Saturday before a warm front arrives late Saturday. Snow
could impact the mountains and perhaps areas east of the Cascades
late Saturday before the warm air moves in and snow levels jump to
7000ft+.
Latest hydrological forecasts keep mainstem rivers well below flood
stage through the weekend and into next week, but we'll be examining
closely the precipitation expected during this active period. Please
see the previous forecast discussion for details on this storm and
subsequent storms.
&&
.AVIATION...For the 13/12Z TAFS...The strong frontal system
moving in from the west this morning is resulting in strong winds
over and through the terrain this morning, surfacing just inland
from the Coast Range from about Interstate 5 in Oregon westward to
the coast and over the coastal waters. Precipitation with snow
levels currently in the th 3500 to 4500 foot range is surely
resulting in icing across the area. The frontal will move onto the
coast this morning and then across inland areas today leading to
ceilings and visibilities reduced into the MVFR to IFR range,
precipitation, and terrain obscurations.
Precipitation is likely to begin as snow across much of the east
side, to include KLMT before mixing with or turning to rain before
turning back to snow late this afternoon and evening.
Wind shear is expected through the morning ahead of the front.
~BTL/DW
&&
.MARINE...Updated 905 AM PST Friday, 13 Nov 2020...
The gale force winds will lower and gradually shift out of the west
later this morning and early afternoon. Heavy northwest swell will
follow, building this afternoon, peaking this evening into tonight,
and then continuing Saturday. Another frontal system will bring
another round of gales Saturday afternoon and evening. This second
wind frontal passage will come close to producing gale force winds.
The active pattern will then continue next week with several fronts
that could be significant, including the possibility of another
episode of very high 15 to 25 foot seas on Tuesday. However, the
details of when and how high winds and seas will peak next week
remains vague due to run to run variability in the numerical models
due to the fast flow across the region.
~BTL/CZS
&&
.PREV DISCUSSION... /Issued 443 AM PST Fri Nov 13 2020/
DISCUSSION...The latest satellite image clearly shows a strong
frontal system knocking on our doorstep. Winds are cranking up along
the coast and offshore with strong winds expected this morning. last
hour North Bend was gusting to 51 mph and Gold Beach at 62 mph. The
general consensus is for winds to diminish along the coast as the
front moves onshore which is expected to occur late this morning at
which point winds will shift from the south to west. Meanwhile
moderate to strong winds are likely inland with the strongest winds
along and east of the Cascades with high winds likely in the higher
terrain this morning through this evening. Also winds west of the
Cascades, especially in the higher terrain in Josephine and Douglas
county and also the Illinois Valley will be moderate to strong
through this afternoon. Right now, southwest winds are funneling
through the Illinois Valley with gust to 22 mph. The only change to
the wind headlines was to end the high wind warning for the coast at
10 am pst because the front will already have pushed inland and
winds will shift west and diminish.
Please see NPWMFR for more details.
Rain will be heaviest along the coast, coastal mountains and
Cascades (below the rain/snow line) through this afternoon, then
rainfall rates will decrease tonight as we get into a post frontal
shower regime. 24 hour rainfall totals from 4 am pst Friday until 4
am pst Saturday) are expected to be between 1-2 inches for the
coastal mountains and Cascades, 0.50 of an inch to 1.0 inch for the
Umpqua Basin and 0.30 to 0.75 of an inch in the Rogue Valley. The
east side could also get their fair share of precipitation, but less
then the areas noted above. Even then some areas could get between
0.25 and 0.50 of an inch of rain.
Heavy snow will be a significant concern with this system due to a
very moist onshore flow and upper level dynamics. Heavy snow of 1 to
2 feet is expected along the Cascades for elevations of 5000 feet
and higher and especially near Crater Lake and Diamond Lake areas.
Highway 140 near Lake of the Woods could pick up 6-12 inches and 5
to 10 inches is expected over Mount Ashland. Snow levels may
fluctuate during the day, starting out around 4000 ft in the
morning, briefly rising above 5000 ft in the afternoon, then
lowering to 4000 ft Friday evening and night. Snow showers will
decrease in coverage and intensity late this evening into tonight.
In the Cascades, in addition to the heavy snow will be strong gusty
winds. Exposed areas in higher portions of the Southern Oregon
Cascades, such as Crater Lake, are expected to see winds gusting to
50 to 60 mph. More protected areas will still see winds gusting into
the 30 to 45 mph range. Strongest winds and heaviest snow are
expected late this morning through this evening. The combination of
strong gusty winds winds and heavy snow will bring extremely
dangerous winter storm conditions to the higher mountains in the
Cascades with the potential for extensive tree damage. White out
conditions may occur. Roads may be impassible at times.
East of the Cascades heavy snow is expected in the Chemult area and
the higher mountains in eastern Klamath and western Lake Counties
with around 6 to 10 inches in these areas. Areas of moderate snow
accumulations are expected south of Chemult into the Klamath basin.
Snow levels are expected down to valley floors, rising to around
5000 to 5500 in the late afternoon then lowering back down in the
evening. Winter storm warning and winter weather advisories remain
in effect for the areas noted above.
In Northern California, the main area of concern for heavy snow is
the in the Mount Shasta area where snow levels are expected to be
lower ahead of the frontal passage. Heavy snow is expected above
4000 feet in the Mount Shasta area with heavy snow impacting areas
of Highway 89 near Snowmans summit and over the higher terrain.
Strong gusty winds are expected in these areas as well with
strongest wind above 5000 feet. So expect periods of blowing snow
and near white out conditions for these areas. Also wet snow
combined with strong gusty winds may result in trees down. For areas
below 4000 feet, moderate snow is expected late this morning into
this afternoon. Snow levels are expected to start out low around
3000 feet then rise between 3500 and 4000 feet this afternoon. Given
the trend towards models showing lower snow levels, expect moderate
wet snow accumulations of 3 to 6 inches down to 3000 feet in the
Mount Shasta City area and along the I-5 corridor between Weed and
Dunsmuir. Please see the WSWMFR for all the details on the winter
storm warning and winter weather advisories.
We'll catch a brief break in the action tonight into Saturday
morning, then a warm front will move through late Saturday morning
bringing moderate rain to the Coast Range and Cascades. Amounts will
range from 0.5" to 0.75". Some rain shadowing is expected for the
Rogue valley and rain amounts will barely reach a tenth. Another
round of gusty winds is expected along the coast from Cape Blanco
north Saturday afternoon and evening. Gusty winds are likely along
the ridges and peaks, as well as all areas east of the Cascades
Saturday afternoon and night. Snow will be less of an impact, with
snow levels rising from around 3500 feet to 4500-5000 feet.
A cold front will move into the area Saturday night and there is
some indications the front could slow down and stall over the area
Sunday through Sunday night which would lead to a prolonged period
of precipitation. The front is then expected to lift north Monday
morning and we could actually catch a break in the weather with dry
and milder weather from late Monday morning through Monday
afternoon.
Another low will track towards the Oregon coast after Monday.
Variability in the timing remains. The operational GFS shows the
front arriving Monday night while the Operational ECMWF shows the
front arriving mid to late morning Tuesday at the coast. The
majority of the individual ECMWF ensemble members are in similar
agreement with the operational ECMWF. Meanwhile the GEFS shows a
more progressive pattern which is in line with the operational GFS.
Other than the timing of when the front moves back, a progressive
pattern is in the works for most of next week with a series of
storms moving through the region. It all comes down to the timing of
each one of these. -Petrucelli
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...High Wind Warning until 10 PM PST this evening for ORZ030-031.
Winter Weather Advisory until 1 AM PST Saturday below 5000 feet
in the for ORZ030-031. Winter Storm Warning until 1 AM PST
Saturday above 5000 feet in the for ORZ030-031. Wind
Advisory until 10 PM PST this evening for ORZ031. High Wind Warning
until 10 AM PST this morning for ORZ021-022. Wind Advisory until 2
PM PST this afternoon for ORZ023-024. Winter Storm Warning until 4
AM PST Saturday above 5000 feet in the for ORZ027-028. Winter
Weather Advisory until 1 AM PST Saturday for ORZ029.
CA...High Wind Warning until 10 PM PST this evening for CAZ085.
Wind Advisory until 10 PM PST this evening for CAZ084-085. Winter
Weather Advisory until 4 PM PST this afternoon above 3000 feet in
the for CAZ082. Winter Storm Warning until 10 PM PST this
evening above 4000 feet in the for CAZ082. Wind Advisory
until 7 PM PST this evening for CAZ081.
Pacific Coastal Waters...Gale Watch from Saturday morning through
Saturday evening for PZZ350-356-370-376. Storm Warning
until 10 AM PST this morning for PZZ350-356-370-376. Gale
Warning until 10 AM PST this morning for PZZ356-370-376.
Hazardous Seas Warning until 4 AM PST Saturday for PZZ350-356-
370-376.In the hours before
Local storm report, Nov 13, 8:32 AM PST, 5 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
832 AM PST FRI NOV 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0831 AM HEAVY RAIN 6 E GOLD BEACH 42.42N 124.31W
11/13/2020 M1.41 INCH CURRY OR TRAINED SPOTTER
RAIN STARTED AROUND 10 PM. MEASUREMENT TAKEN
AT 8:30 AM.
&&
BSThe office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 13, 3:05 AM PST | Gale Watch | MFR | 11 hr | |
| Nov 13, 3:05 AM PST | Storm Warning | MFR | 7 hr | |
| Nov 13, 1:57 PM PST | High Wind Watch | MFR | Coos, Curry, Douglas, Klamath, Lake | 9 hr |
| Nov 13, 2:31 PM PST | Gale Warning | MFR | 37 hr | |
| Nov 13, 2:31 PM PST | Small Craft Advisory | MFR | 38 hr | |
| Nov 13, 2:31 PM PST | Winter Weather Advisory | MFR | Douglas, Jackson, Klamath | 33 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.