Alert archive / Oregon / Winter Storm Warnings in 2021
Winter Storm Warning 6, NWS Medford, OR
NWS Medford, OR issued this winter storm warning at Feb 12, 2021, 8:59 PM PST for 4 counties in Oregon. It took effect at Feb 12, 2021, 10:00 PM PST. It was in force for 13 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
- Feb 12, 2021, 8:59 PM PST (04:59 UTC)
- In effect from
- Feb 12, 2021, 10:00 PM PST
- Expired
- Feb 13, 2021, 10:33 AM PST
- In force
- 13 hr
- Issued by
- NWS Medford, OR
Counties Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR
The radar
The Medford radar (KMAX), 68 km from the middle of the area, began a volume at 05:02 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 00:00Z, 5.0 hours before the alert went out and 36 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
- 861 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 326 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
991 WWUS46 KMFR 130459 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 859 PM PST Fri Feb 12 2021 ORZ027-028-131800- /O.NEW.KMFR.WS.W.0006.210213T0600Z-210214T0000Z/ /O.EXT.KMFR.WW.Y.0016.210213T0600Z-210214T0000Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Crescent Lake, Diamond Lake, and Howard Prairie 859 PM PST Fri Feb 12 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 4 PM PST SATURDAY ABOVE 5500 FEET... ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST SATURDAY ABOVE 4500 FEET... * WHAT...For the Winter Storm Warning above 5500 feet, heavy snow expected. Total snow accumulations of 12 to 18 inches. Winds gusting as high as 40 mph. For the Winter Weather Advisory above 4500 feet, snow expected. Total snow accumulations of 5 to 12 inches. Winds gusting as high as 40 mph. * WHERE...South Central Oregon Cascades and Siskiyou Mountains and Southern Oregon Cascades. The warning area includes the Cascade Crest above 5500 feet from near Lake of the Woods north through Crater Lake to around the Diamond Lake area. This includes the highest portions of highways 62, 138, and 230. The advisory area includes areas above 4500 feet, including Howard Prairie. This includes portions of highways 62, 230, 138, 140, 66 and the Mount Ashland Ski road. In Klamath County and Western Lake County this includes Modoc Point, Chiloquin, Chemult and Crescent and higher terrain above 4500 feet. This includes portions of highway 97, 140, 58, and 31. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow levels will start around 4500 feet and drop to around 3500 feet during the advisory. Interstate 5 at Siskiyou Summit is not included in this advisory, but they will see up to 2 inches of snow during this period. Snow will be heaviest from midnight until 10 am pst Saturday, but lighter snow is expected before and after the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD 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. * See https://www.tripcheck.comfor latest road conditions. * A Winter Storm Warning means that severe winter weather is imminent and poses a threat to life and property. Take protective action now. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ029-030-131800- /O.EXT.KMFR.WW.Y.0016.210213T0600Z-210214T0000Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the cities of Chemult, Crescent, and Gilchrist 859 PM PST Fri Feb 12 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST SATURDAY ABOVE 4500 FEET... * WHAT...Wet snow expected above 4500 feet. Total snow accumulations of 2 to 5 inches along highway 97 north of Chiloquin and highway 31 north of Silver Lake. 6 to 9 inches on highway 62 towards Crater Lake and highways 232 and 138 near Diamond Lake. 4 to 8 inches on highway 140 near Lake of the Woods and near Mount Ashland Ski Area. Winds gusting as high as 35 mph. * WHERE...This includes Modoc Point, Chiloquin, Chemult and Crescent and higher terrain above 4500 feet in Klamath and western Lake Counties. This also includes portions of highway 97, 140, 58, and 31. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Plan on slippery conditions and snow-covered roadways. Visibilities may be reduced with blowing snow after 4 AM. * ADDITIONAL DETAILS...Snow levels will start around 4500 feet and drop to around 3500 feet during the advisory. Snow will be heaviest from midnight until 10 am pst Saturday, but lighter snow is expected before and after the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ CAZ082-083-085-ORZ031-131800- /O.CON.KMFR.WW.Y.0016.210213T0600Z-210213T1800Z/ South Central Siskiyou County- North Central and Southeast Siskiyou County-Modoc County- Central and Eastern Lake County- Including the city of Valley Falls 859 PM PST Fri Feb 12 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SATURDAY ABOVE 4500 FEET... * WHAT...Wet snow above 4500 feet expected. Snow accumulations of 2 to 5 inches. Winds could gust as high as 35 mph bringing periods of reduced visibility. * WHERE...The Warner Mountains in Oregon and California, including portions of Highway 299 at Cedar Pass, Highway 140 near Lakeview, and the higher elevations of highway 97 south of Macdoel. In addition, rural areas of southern and eastern Siskiyou County and the Mt. Shasta Ski Park. * WHEN...From 10 PM Friday to 10 AM PST Saturday. * IMPACTS...Plan on slippery conditions and snow-covered roadways. Visibilities could decrease due to winds blowing snow. * ADDITIONAL DETAILS...Snow levels will start around 5000 feet and drop to 4000 feet through Saturday morning. Snow will be heaviest from midnight until 10 am pst Saturday, but lighter snow is expected before and after the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD 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 and http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ CAZ080-131800- /O.CON.KMFR.WW.Y.0016.210213T0600Z-210213T1800Z/ Western Siskiyou County- 859 PM PST Fri Feb 12 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SATURDAY ABOVE 4500 FEET... * WHAT...Wet snow above 4500 feet expected. Snow accumulations of 3 to 6 inches. West winds gusting as high as 45 mph. * WHERE...Portions of the Marble Mountains in western Siskiyou County. This includes Sawyers Bar Road at Etna Mountain Summit and portions of Highway 3 south of Callahan near Scott Mountain. * WHEN...From 10 PM Friday to 10 AM PST Saturday. * IMPACTS...Plan on slippery conditions and snow-covered roadways. Visibilities could decrease due to winds blowing snow. * ADDITIONAL DETAILS...Snow levels will start around 5000 feet and drop to 4000 feet through Saturday morning. Snow will be heaviest from midnight until 10 am pst Saturday, but lighter snow is expected before and after the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
1 follow-up statement
874 WWUS46 KMFR 131833 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1033 AM PST Sat Feb 13 2021 ORZ027-028-140000- /O.CAN.KMFR.WS.W.0006.000000T0000Z-210214T0000Z/ /O.CON.KMFR.WW.Y.0016.000000T0000Z-210214T0000Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Crescent Lake, Diamond Lake, and Howard Prairie. 1033 AM PST Sat Feb 13 2021 ...WINTER STORM WARNING HAS BEEN CANCELLED... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET... * WHAT...For the Winter Weather Advisory above 4500 feet, additional snow accumulations of 2 to 6 inches. Winds gusting as high as 40 mph. * WHERE...South Central Oregon Cascades and Siskiyou Mountains and Southern Oregon Cascades. The warning area includes the Cascade Crest above 4500 feet from near Lake of the Woods north through Crater Lake to around the Diamond Lake area and Howard Prairie. This includes the portions of highways 62, 138, 230, 138, 140, 66 and the Mount Ashland Ski road. In Klamath County and Western Lake County this includes Modoc Point, Chiloquin, Chemult and Crescent and higher terrain above 4500 feet. This includes portions of highway 97, 140, 58, and 31. * WHEN...For the Winter Weather Advisory, until 4 PM PST this afternoon. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow levels of around 4500 feet will drop to around 3500 feet during the advisory. Interstate 5 at Siskiyou Summit is not included in this advisory, but they will see around an inch of additional snow during this period. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD 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. * See https://www.tripcheck.comfor latest road conditions. * A Winter Storm Warning means that severe winter weather is imminent and poses a threat to life and property. Take protective action now. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ CAZ082-083-085-ORZ031-140000- /O.NEW.KMFR.WW.Y.0017.210213T1833Z-210214T0000Z/ South Central Siskiyou County- North Central and Southeast Siskiyou County-Modoc County- Central and Eastern Lake County- Including the city of Valley Falls 1033 AM PST Sat Feb 13 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET... * WHAT...Wet snow above 4500 feet expected. Additional Snow accumulations of up to 2 inches. Winds could gust as high as 35 mph bringing periods of reduced visibility. * WHERE...The Warner Mountains in Oregon and California, including portions of Highway 299 at Cedar Pass, Highway 140 near Lakeview, and the higher elevations of highway 97 south of Macdoel. In addition, rural areas of southern and eastern Siskiyou County and the Mt. Shasta Ski Park. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Plan on slippery conditions and snow-covered roadways. Visibilities could decrease due to winds blowing snow. * ADDITIONAL DETAILS...Snow levels will start around 5000 feet and drop to 4000 feet through Saturday morning. Snow will be heaviest from midnight until 10 am pst Saturday, but lighter snow is expected before and after the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com and http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ029-030-140000- /O.CON.KMFR.WW.Y.0016.000000T0000Z-210214T0000Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the cities of Chemult, Crescent, and Gilchrist 1033 AM PST Sat Feb 13 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 4500 FEET... * WHAT...Snow expected above 4500 feet. Additional snow accumulations of up to 2 inches. Winds gusting as high as 35 mph. * WHERE...This includes Modoc Point, Chiloquin, Chemult and Crescent and higher terrain above 4500 feet in Klamath and western Lake Counties. This also includes portions of highway 97, 140, 58, and 31. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Plan on slippery conditions and snow-covered roadways. Visibilities may be reduced with blowing snow after 4 AM. * ADDITIONAL DETAILS...Snow levels will start around 4500 feet and drop to around 3500 feet during the advisory. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD 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. && $$ Visit us at https://www.weather.gov/Medford
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 2:11 AM PST | Small Craft Advisory | MFR | 18 hr | |
| Feb 13, 10:33 AM PST | Winter Weather Advisory | MFR | Lake | 4 hr |
Nearby
Winter Storm Warnings in Oregon, 2021Every winter storm warning in 2021
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.