Alert archive / California / Winter Storm Warnings in 2020
Winter Storm Warning 4, NWS Medford, OR
NWS Medford, OR issued this winter storm warning at Jan 20, 2020, 2:29 AM PST for Siskiyou County, California. It took effect at Jan 21, 2020, 1:00 AM 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
- Jan 20, 2020, 2:29 AM PST (10:29 UTC)
- In effect from
- Jan 21, 2020, 1:00 AM PST
- Expired
- Jan 21, 2020, 2:00 PM PST
- In force
- 13 hr
- Issued by
- NWS Medford, OR
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 10:29 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, 10.5 hours before the alert went out and 89 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
- 1904 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
988 WWUS46 KMFR 201029 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 229 AM PST Mon Jan 20 2020 CAZ082-201830- /O.UPG.KMFR.WS.A.0003.200121T0600Z-200122T0000Z/ /O.NEW.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ /O.NEW.KMFR.WS.W.0004.200121T1200Z-200121T2200Z/ South Central Siskiyou County- Including the city of Mount Shasta 229 AM PST Mon Jan 20 2020 ...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 3500 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph. For the Winter Weather Advisory above 3500 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3500 feet, including Mount Shasta City, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Heaviest snowfall is expected Tuesday morning. Snow levels may lower to 3000 ft elevation at times Tuesday morning. * 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. * A Winter Storm Warning means that severe winter weather is |likely and poses a threat to life and property. Take protective action now. && $$ CAZ080-201830- /O.UPG.KMFR.WS.A.0003.200121T0600Z-200122T0000Z/ /O.NEW.KMFR.WS.W.0004.200121T0900Z-200121T2200Z/ Western Siskiyou County- 229 AM PST Mon Jan 20 2020 ...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * ADDITIONAL DETAILS... Heaviest snow is expected late Monday night through Tuesday morning. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Travel is strongly discouraged because of dangerous conditions. * If you must travel, keep tire chains, a flashlight, blankets, food, water, medications, and a fully charged phone with you. * The safest place during a winter storm is indoors. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ083-201830- /O.NEW.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 229 AM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * 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
6 follow-up statements
297 WWUS46 KMFR 201823 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1023 AM PST Mon Jan 20 2020 CAZ082-210230- /O.CON.KMFR.WS.W.0004.200121T1200Z-200121T2200Z/ /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ South Central Siskiyou County- Including the city of Mount Shasta 1023 AM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 3500 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph. For the Winter Weather Advisory above 3500 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3500 feet, including Mount Shasta City, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Heaviest snowfall is expected Tuesday morning. Snow levels may lower to 3000 ft elevation at times Tuesday morning. * 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. * A Winter Storm Warning means that severe winter weather is |likely and poses a threat to life and property. Take protective action now. && $$ CAZ080-210230- /O.CON.KMFR.WS.W.0004.200121T0900Z-200121T2200Z/ Western Siskiyou County- 1023 AM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * ADDITIONAL DETAILS... Heaviest snow is expected late Monday night through Tuesday morning. * 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. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ083-210230- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 1023 AM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
319 WWUS46 KMFR 202010 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1210 PM PST Mon Jan 20 2020 CAZ082-211300- /O.CON.KMFR.WS.W.0004.200121T1200Z-200121T2200Z/ /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ South Central Siskiyou County- Including the cities of McCloud and Mount Shasta 1210 PM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 3000 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph. For the Winter Weather Advisory above 3000 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3000 feet, including Mount Shasta City, McCloud, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...One inch per hour snow fall rates are possible between 4 AM and 10 AM. * 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. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ080-211300- /O.CON.KMFR.WS.W.0004.200121T0900Z-200121T2200Z/ Western Siskiyou County- 1210 PM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Travel is strongly discouraged because of dangerous conditions. * If you must travel, keep tire chains, a flashlight, blankets, food, water, medications, and a fully charged phone with you. * The safest place during a winter storm is indoors. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ ORZ029-030-211300- /O.EXB.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 1210 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 10 AM PST TUESDAY... * WHAT...Wet snow expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 45 mph. * WHERE...Klamath Basin and Northern and Eastern Klamath County and Western Lake County. Including, Modoc Point and Chemult. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Expecting snow levels to hover near 4000 feet, with the heaviest snow fall between 7 AM and 10 AM. * 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. && $$ ORZ027-028-211300- /O.EXB.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Diamond Lake, and Union Creek 1210 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 10 AM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of up to 6 inches. Winds gusting as high as 40 mph. * WHERE...South Central Oregon Cascades, Southern Oregon Cascades and Siskiyou Mountains including Union Creak and Diamond Lake. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels may rise at the onset, but should fall rapidly to near 3500 feet when the heavier snow fall occurs, between 7 AM and 10 AM. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ CAZ083-211300- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 1210 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * 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
968 WWUS46 KMFR 210142 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 542 PM PST Mon Jan 20 2020 CAZ082-211400- /O.CON.KMFR.WS.W.0004.200121T1200Z-200121T2200Z/ /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ South Central Siskiyou County- Including the cities of McCloud and Mount Shasta 542 PM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY ABOVE 3000 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph. For the Winter Weather Advisory above 3000 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3000 feet, including Mount Shasta City, McCloud, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...One inch per hour snow fall rates are possible between 4 AM and 10 AM. * 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. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ080-211400- /O.CON.KMFR.WS.W.0004.200121T0900Z-200121T2200Z/ Western Siskiyou County- 542 PM PST Mon Jan 20 2020 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TO 2 PM PST TUESDAY ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * 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. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ083-211400- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 542 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 2 PM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant and the City of Pondosa. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ029-030-211400- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 542 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 10 AM PST TUESDAY... * WHAT...Wet snow expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 45 mph. * WHERE...Klamath Basin and Northern and Eastern Klamath County and Western Lake County. Including, Modoc Point and Chemult. This also includes US Highway 97, Oregon Highways 58 and 138 and portions of Highway 140 above 4000 feet. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Expecting snow levels to hover near 4000 feet, with the heaviest snow fall between 7 AM and 10 AM. * 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. && $$ ORZ027-028-211400- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Diamond Lake, and Union Creek 542 PM PST Mon Jan 20 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 10 AM PST TUESDAY... * WHAT...Snow expected. Total snow accumulations of up to 6 inches. Winds gusting as high as 40 mph. * WHERE...South Central Oregon Cascades, Southern Oregon Cascades and Siskiyou Mountains including Union Creak and Diamond Lake. This includes Highways 62, 138, 230, portions of Highway 140 near Lake of the Woods Pass, and portions of Highway 66. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels may rise at the onset, but should fall rapidly to near 3500 feet when the heavier snow fall occurs, between 7 AM and 10 AM. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
113 WWUS46 KMFR 211148 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 348 AM PST Tue Jan 21 2020 CAZ082-212200- /O.CON.KMFR.WS.W.0004.200121T1200Z-200121T2200Z/ /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ South Central Siskiyou County- Including the cities of McCloud and Mount Shasta 348 AM PST Tue Jan 21 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 3000 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph. For the Winter Weather Advisory above 3000 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3000 feet, including Mount Shasta City, McCloud, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...One inch per hour snow fall rates are possible between 4 AM and 10 AM. * 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. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ080-212200- /O.CON.KMFR.WS.W.0004.000000T0000Z-200121T2200Z/ Western Siskiyou County- 348 AM PST Tue Jan 21 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Travel is strongly discouraged because of dangerous conditions. * If you must travel, keep tire chains, a flashlight, blankets, food, water, medications, and a fully charged phone with you. * The safest place during a winter storm is indoors. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ CAZ083-212200- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 348 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant and the City of Pondosa. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * 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. && $$ ORZ029-030-211800- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 348 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Wet snow expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 45 mph. * WHERE...Klamath Basin and Northern and Eastern Klamath County and Western Lake County. Including, Modoc Point and Chemult. This also includes US Highway 97, Oregon Highways 58 and 138 and portions of Highway 140 above 4000 feet. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Expecting snow levels to hover near 4000 feet, with the heaviest snow fall between 7 AM and 10 AM. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ027-028-211800- /O.CON.KMFR.WW.Y.0007.200121T1200Z-200121T1800Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Diamond Lake, and Union Creek 348 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Snow expected. Total snow accumulations of up to 9 inches. Winds gusting as high as 40 mph. * WHERE...South Central Oregon Cascades, Southern Oregon Cascades and Siskiyou Mountains including Union Creak and Diamond Lake. This includes Highways 62, 138, 230, portions of Highway 140 near Lake of the Woods Pass, and portions of Highway 66. * WHEN...From 4 AM to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow levels may rise at the onset, but should fall rapidly to near 3500 feet when the heavier snow fall occurs, between 7 AM and 10 AM. * 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. && $$ Visit us at https://www.weather.gov/Medford
147 WWUS46 KMFR 211742 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 942 AM PST Tue Jan 21 2020 ORZ029-030-211845- /O.EXP.KMFR.WW.Y.0007.000000T0000Z-200121T1800Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 942 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... The intense snow showers have let up. Some lighter snow showers are still possible this afternoon and this evening. $$ ORZ027-028-211845- /O.EXP.KMFR.WW.Y.0007.000000T0000Z-200121T1800Z/ South Central Oregon Cascades- Siskiyou Mountains and Southern Oregon Cascades- Including the cities of Crater Lake, Diamond Lake, and Union Creek 942 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... The intense snow showers have let up. Some lighter snow showers are still possible this afternoon and this evening. $$ CAZ082-212200- /O.CON.KMFR.WS.W.0004.000000T0000Z-200121T2200Z/ /O.CON.KMFR.WW.Y.0007.000000T0000Z-200121T2200Z/ South Central Siskiyou County- Including the cities of McCloud and Mount Shasta 942 AM PST Tue Jan 21 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 3000 FEET... * WHAT...For the Winter Storm Warning above 4500 feet, heavy snow expected. Total snow accumulations of 6 to 10 inches with locally higher amounts above 6000 feet. Winds gusting to 40 to 50 mph over exposed terrain. For the Winter Weather Advisory above 3000 feet, moderate snow expected. Total snow accumulations of 3 to 6 inches. Winds gusting to 20 to 30 mph over exposed terrain. * WHERE...South Central Siskiyou County. The winter storm warning includes elevations above 4500 feet, including Snowmans Summit and Dead Horse Summit on Highway 89. The winter weather advisory is for elevations above 3000 feet, including Mount Shasta City, McCloud, portions of Interstate 5 from Mount Shasta City to near Weed and Highway 89 east of Mount Shasta City. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the morning commute. Heavy snow with gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Travel is strongly discouraged because of dangerous conditions. * If you must travel, keep tire chains, a flashlight, blankets, food, water, medications, and a fully charged phone with you. * The safest place during a winter storm is indoors. * A Winter Storm Warning means that severe winter weather is occurring and poses a threat to life and property. Take protective action now. && $$ CAZ080-212200- /O.CON.KMFR.WS.W.0004.000000T0000Z-200121T2200Z/ Western Siskiyou County- 942 AM PST Tue Jan 21 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... * WHAT...Heavy snow expected above 4500 feet. Total snow accumulations of 5 to 10 inches. Winds gusting to around 35 to 50 mph over exposed terrain. * WHERE...Western Siskiyou County. This includes elevations above 4500 feet, including high portions of Sawyers Bar Road near Etna Summit and Highway 3 near Scott Mountain. * WHEN...From 1 AM to 2 PM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Heavy snow and gusty winds could bring down tree branches. * 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. * A Winter Storm Warning means that severe winter weather is occurring and poses a threat to life and property. Take protective action now. && $$ CAZ083-212200- /O.CON.KMFR.WW.Y.0007.000000T0000Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 942 AM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches, with locally higher amounts up to 10 inches above 6000 feet. Winds gusting to around 35 to 50 mph over exposed terrain. * WHERE...North Central and Southeast Siskiyou County. This includes areas south of Tennant and the City of Pondosa. * WHEN...From 4 AM to 2 PM PST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Snow combined with gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com or http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
360 WWUS46 KMFR 212131 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 131 PM PST Tue Jan 21 2020 CAZ082-212245- /O.EXP.KMFR.WS.W.0004.000000T0000Z-200121T2200Z/ /O.EXP.KMFR.WW.Y.0007.000000T0000Z-200121T2200Z/ South Central Siskiyou County- Including the cities of McCloud and Mount Shasta 131 PM PST Tue Jan 21 2020 ...WINTER STORM WARNING WILL EXPIRE AT 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY WILL EXPIRE AT 2 PM PST THIS AFTERNOON ABOVE 3000 FEET... The intense snow showers have let up. Some lighter snow showers are still possible this afternoon and this evening. $$ CAZ080-212245- /O.EXP.KMFR.WS.W.0004.000000T0000Z-200121T2200Z/ Western Siskiyou County- 131 PM PST Tue Jan 21 2020 ...WINTER STORM WARNING WILL EXPIRE AT 2 PM PST THIS AFTERNOON ABOVE 4500 FEET... The intense snow showers have let up. Some lighter snow showers are still possible this afternoon and this evening. $$ CAZ083-212245- /O.EXP.KMFR.WW.Y.0007.000000T0000Z-200121T2200Z/ North Central and Southeast Siskiyou County- Including the city of Pondosa 131 PM PST Tue Jan 21 2020 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 2 PM PST THIS AFTERNOON... The intense snow showers have let up. Some lighter snow showers are still possible this afternoon and this evening. $$ Visit us at https://www.weather.gov/Medford
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 Jan 19, 8:45 PM PST, 5 hours 44 minutes earlier.
Area forecast discussion, Jan 19, 8:45 PM PST, 5 hours 44 minutes before
Area Forecast Discussion
National Weather Service Medford OR
845 PM PST Sun Jan 19 2020
.DISCUSSION...Water Vapor channels on the GOES West satellite are
showing increased moisture and the IR channel is showing
increasing clouds ahead of a warm front coming through the area.
Radar is showing some extremely light returns, but nothing appears
to be reaching the ground. This will continue overnight, and could
preclude some fog. Overall, still think the forecast is correct in
having the fog return tonight. No changes are needed.
The next front arriving Monday night will bring some rain and snow
with it. My goal for the rest of this shift is to get a better
determination of the snow level to either upgrade the Winter
Storm Watch and also issue any needed advisories. Please see the
WSWMFR for more information. -Schaaf
&&
.MARINE...Updated 830 PM PST Sunday 19 Jan 2020...A weak front
will move in tonight, starting a trend of increasing south winds and
building seas. Conditions will be hazardous to small craft through
Monday with south winds of 15 to 25 kt and gusts to 30 kt and seas
of 10 to 15 feet at 15 seconds. A stronger front will likely produce
gales and very steep wind-driven seas Monday night followed by very
high and very steep long-period swell through Tuesday evening. Seas
will likely peak near 20 feet at 15 seconds during this time frame
with bar conditions becoming very hazardous. The pattern will remain
active for the rest of the week with several fronts moving through.
These fronts will likely generate winds and seas at least at small
craft advisory levels. -Spilde/DW
&&
.PREV DISCUSSION... /Issued 246 PM PST Sun Jan 19 2020/
DISCUSSION...Low clouds and fog have cleared from the majority
of the forecast area this afternoon, and temperatures have risen
close to the values forecast for most West Side valleys.
Afternoon readings should peak at near to slightly above normal
for this time of year. Warmest conditions right now are in the
Umpqua Valley, the southern end of the Rogue Valley (where
downsloping winds are helping to mix and warm), and at the coast
near North Bend. One area that is stubbornly refusing to clear out
of the low clouds is the Illinois Valley.
Satellite imagery is showing a disorganized frontal boundary off the
coast. This feature will weaken further as the main energy pushes
north of the area and the trailing boundary brushes the area
Monday. No precipitation is expected with this.
A more significant front will approach Monday night and will bring
increasing southerly winds to much of the area. Gusts to 60 mph are
likely at the headlands of the coast while most areas at the coast
will experience gusts to 50 mph Monday night or early Tuesday
morning. We've issued a Wind Advisory (I-5 near Weed) for the Shasta
Valley and portions of the East Side (Hwy 31 near Summer Lake) from
Monday night into Tuesday. 700mb (10,000ft) winds with this front
aren't expected to be in the top 10 percent for this time of year
(peaking at 50-60 kt), so it's not a huge event. However, the
consensus of model guidance supports an Advisory.
Overall precipitation with the front is also not expected to be
major for mid-winter, but there are some areas of concern. The
front will move through rather quickly, but precipitation rates
along it will be moderate to heavy. The health southerly flow will
enhance precipitation over portions of Northern California,
including the Mt Shasta City area in particular. This could bring
a period of heavy snow to areas above 4000 feet, including Highway
89 at Snowmans Summit. We've issued a Winter Storm Watch for
Monday night into Tuesday for Western Siskiyou County and the Mt
Shasta City area above 4000 feet. We're interesting in viewing
some high- resolution data for snow levels over the next 1-2
shifts before issuing a Warning. We'll also be considering issuing
Winter Weather Advisory for the Cascades and Siskiyous and
Highway 97 near Chemult pending the next few model runs.
Snow levels lower to 3500 feet Tuesday afternoon behind the front,
and rain/snow showers can be expected.
Long term discussion...Wed 22 Jan through Sun 26 Jan 2020.
An upper ridge building in from the southwest will force a warm
front north through the area Wednesday. This will bring light
precipitation to most of the Medford CWA Wednesday into Wednesday
night. Snow levels will start off in the 3000-4000 foot range rising
to 500-6500 feet.
The ridge will break to the east of the area Wednesday night, and a
short wave ejecting from the upstream trough will push a cold front
onshore Thursday. This front will weaken and stall over the area
Thursday night as the upper level support moves east.
Yet another ejecting short wave will push another front onshore
Friday night. This one will be stronger as the short wave will be
stronger and the long wave trough will be closer to the coast.
The EC and GFS model solutions diverge from Saturday on. They both
depict an offshore trough, but they differ on the strength and
timing of ejecting short waves, and thus differ on the timing and
strength of incoming fronts. There is high confidence that the
overall pattern will be stormy, but confidence is low on the timing
and strength of individual fronts. Snow levels will vary between
4500 and 7000 feet, remaining above the major passes.
AVIATION...For the 19/18Z TAF Cycle...Areas of IFR cigs/vsbys in
low clouds and fog over some of the valleys, including KMFR and
KLMT, will clear to VFR early Sunday afternoon. VFR conditions will
then prevail through Sunday evening, then the IFR conditions will
return to the same areas late Sunday night through Monday morning.
Conditions will improve to VFR again by Monday afternoon, but areas
of MVFR cigs will develop over the coastal waters late Monday
afternoon, moving onshore Monday evening with higher terrain
becoming obscured.
MARINE...Updated 230 PM PST Sunday 19 Jan 2020...A weak front
will move in tonight, starting a trend of increasing south winds and
building seas. Conditions will be hazardous to small craft through
Monday with south winds of 15 to 25 kt and gusts to 30 kt and seas
of 10 to 15 feet at 15 seconds. A stronger front will likely produce
gales and very steep wind-driven seas Monday night followed by very
high and very steep long-period swell through Tuesday evening. Seas
will likely peak near 20 feet at 15 seconds during this time frame
with bar conditions becoming very hazardous. The pattern will remain
active for the rest of the week with several weaker fronts moving
through. These fronts will likely generate small craft advisory
winds and seas. -Spilde
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Wind Advisory from 1 AM to 4 PM PST Tuesday for ORZ030-031.
CA...Winter Storm Watch from Monday evening through Tuesday afternoon
above 4000 feet in the for CAZ080.
Winter Storm Watch from Monday evening through Tuesday afternoon
above 4000 feet in the for CAZ082.
Wind Advisory from 4 PM Monday to 10 AM PST Tuesday for CAZ081.
Pacific Coastal Waters...Small Craft Advisory until 4 PM PST Monday for
PZZ350-356-370-376.
Gale Warning from 4 PM Monday to 4 AM PST Tuesday for
PZZ350-356-370-376.
Hazardous Seas Warning from 4 AM to 10 PM PST Tuesday for
PZZ350-356-370-376.The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 20, 2:29 AM PST | Winter Weather Advisory | MFR | Siskiyou | 36 hr |
Nearby
Winter Storm Warnings in California, 2020Every winter storm warning in 2020
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.