Alert archive / Oregon / Winter Weather Advisories in 2021
Winter Weather Advisory 2, NWS Medford, OR
NWS Medford, OR issued this winter weather advisory at Jan 1, 2021, 12:43 PM PST for Douglas County, Jackson County, Klamath County, Oregon. It took effect at Jan 2, 2021, 4:00 PM PST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Jan 1, 2021, 12:43 PM PST (20:43 UTC)
- In effect from
- Jan 2, 2021, 4:00 PM PST
- Expired
- Jan 3, 2021, 1:00 PM PST
- In force
- 21 hr
- Issued by
- NWS Medford, OR
Counties Douglas County, OR, Jackson County, OR, Klamath County, OR
The radar
The Medford radar (KMAX), 82 km from the middle of the area, began a volume at 20:41 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, 8.7 hours before the alert went out and 53 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
- 967 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
571 WWUS46 KMFR 012043 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1243 PM PST Fri Jan 1 2021 ...Periods of moderate wet snow to impact the higher terrain of southern Oregon and northern California this weekend... .A series of storm systems will move through the area this weekend, bringing periods of light to moderate snow to the area. The first front will arrive over the next few hours and will produce moderate snowfall for areas in western Siskiyou County. Then, the second and third systems will move through the area on Saturday and Sunday bringing additional light to moderate snowfall, focused along the Cascades. CAZ080-021200- /O.NEW.KMFR.WW.Y.0001.210102T0000Z-210102T1200Z/ Western Siskiyou County- 1243 PM PST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IN EFFECT ABOVE 4500 FROM 4 PM THIS AFTERNOON TO 4 AM PST SATURDAY... * WHAT...Moderate snow above 4500 feet expected. Total snow accumulations of 3 to 5 inches. Above 5500 feet, accumulations will reach up to 8 inches with snowfall rates of near an inch an hour. Winds will gust as high as 45 mph, especially in exposed areas of higher terrain. * WHERE...Portions of the Marble Mountains in western Siskiyou County. This includes Sawyers Bar Road from Etna to Sawyers Bar above 4500 feet. * WHEN...From 4 PM this afternoon to 4 AM PST Saturday. The heaviest snow will occur from 4 PM until Midnight Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact evening travel. 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. && $$ ORZ027-021200- /O.NEW.KMFR.WW.Y.0002.210103T0000Z-210103T1800Z/ South Central Oregon Cascades- Including the city of Crater Lake 1243 PM PST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM SATURDAY TO 10 AM PST SUNDAY ABOVE 5000 FEET... * WHAT...Wet snow above 5000 feet expected. Snow accumulations of 5 to 10 inches. Winds gusting as high as 55 mph in areas of exposed higher terrain. * WHERE...Portions of the Cascades from Crater Lake north through Diamond Lake. This includes portions of Highways 62, 230, and 138. * WHEN...From 4 PM Saturday to 10 AM PST Sunday. The heaviest snow will be between 9 PM Saturday and 5 AM Sunday * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * ADDITIONAL DETAILS...This advisory highlights the highest snowfall rates during a 3 day-long snow event. Thus, expect light snow before and after the advisory time frame. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
6 follow-up statements
173 WWUS46 KMFR 020600 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1000 PM PST Fri Jan 1 2021 .Two storms will move through the area this weekend, bringing periods of light to moderate snow to the area Saturday and Sunday. The heaviest snow will occur along the Cascades. CAZ080-020700- /O.CAN.KMFR.WW.Y.0001.000000T0000Z-210102T1200Z/ Western Siskiyou County- 1000 PM PST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The front has moved to the east of the area and snow has diminished. $$ ORZ027-022300- /O.CON.KMFR.WW.Y.0002.210103T0000Z-210103T1800Z/ South Central Oregon Cascades- Including the city of Crater Lake 1000 PM PST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM SATURDAY TO 10 AM PST SUNDAY ABOVE 5000 FEET... * WHAT...Wet snow above 5000 feet expected. Snow accumulations of 5 to 10 inches. Winds gusting as high as 55 mph in areas of exposed higher terrain. * WHERE...Portions of the Cascades from Crater Lake north through Diamond Lake. This includes portions of Highways 62, 230, and 138. * WHEN...From 4 PM Saturday to 10 AM PST Sunday. The heaviest snow will be between 9 PM Saturday and 5 AM Sunday. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * ADDITIONAL DETAILS...This advisory highlights the highest snowfall rates during a 3 day-long snow event. Thus, expect light snow before and after the advisory time frame. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ Visit us at https://www.weather.gov/Medford
135 WWUS46 KMFR 021100 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 300 AM PST Sat Jan 2 2021 ORZ027-021900- /O.CON.KMFR.WW.Y.0002.210103T0000Z-210103T1800Z/ South Central Oregon Cascades- Including the city of Crater Lake 300 AM PST Sat Jan 2 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SUNDAY ABOVE 5000 FEET... * WHAT...Wet snow above 5000 feet expected. Snow accumulations of 5 to 10 inches. Winds gusting as high as 55 mph in areas of exposed higher terrain. * WHERE...Portions of the Cascades from Crater Lake north through Diamond Lake. This includes portions of Highways 62, 230, and 138. * WHEN...From 4 PM today to 10 AM PST Sunday. The heaviest snow will be between 1 AM and 7 AM Sunday morning. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * ADDITIONAL DETAILS...This advisory highlights the highest snowfall rates during a 3 day-long snow event. Thus, expect light snow before and after the advisory time frame. * 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. && $$ CAZ080-082-083-021900- /O.NEW.KMFR.WS.A.0001.210104T1200Z-210105T1200Z/ Western Siskiyou County-South Central Siskiyou County- North Central and Southeast Siskiyou County- 300 AM PST Sat Jan 2 2021 ...WINTER STORM WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH LATE MONDAY NIGHT ABOVE 5000 FEET... * WHAT...Heavy snow possible above 5000 feet. Total snow accumulations of 8 to 16 inches possible. Winds could gust as high as 60 mph in exposed areas. * WHERE...Western Siskiyou County, South Central Siskiyou County and North Central and Southeast Siskiyou County to include Etna Summit and Sawyers Bar Road, Everitt Memorial Highway, and Mount Shasta Ski Park. * WHEN...From late Sunday night through late Monday night. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Snow levels will lower Monday night, so there is a small chance (25 percent) for snow impacts below 5000 feet to include portions of Interstate 5 and Highway 89. Confidence is medium on snow levels and will continue to evaluate latest data. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Stock emergency kit with tire chains, flashlight, batteries, blankets, food, water, and medications. * The safest place during a winter storm is indoors. * Plan now to avoid traveling during the storm. * A Winter Storm Watch means there is potential for significant snow accumulations that may create dangerous travel. && $$ Visit us at https://www.weather.gov/Medford
230 WWUS46 KMFR 021421 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 621 AM PST Sat Jan 2 2021 ORZ027-022230- /O.CON.KMFR.WW.Y.0002.210103T0000Z-210103T1800Z/ South Central Oregon Cascades- Including the city of Crater Lake 621 AM PST Sat Jan 2 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SUNDAY ABOVE 5000 FEET... * WHAT...Wet snow above 5000 feet expected. Snow accumulations of 5 to 10 inches. Winds gusting as high as 55 mph in areas of exposed higher terrain. * WHERE...Portions of the Cascades from Crater Lake north through Diamond Lake. This includes portions of Highways 62, 230, and 138. * WHEN...From 4 PM today to 10 AM PST Sunday. The heaviest snow will be between 1 AM and 7 AM Sunday morning. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * ADDITIONAL DETAILS...This advisory highlights the highest snowfall rates during a 3 day-long snow event. Thus, expect light snow before and after the advisory time frame. * 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. && $$ CAZ080-082-083-022230- /O.CON.KMFR.WS.A.0001.210104T1200Z-210105T1200Z/ Western Siskiyou County-South Central Siskiyou County- North Central and Southeast Siskiyou County- 621 AM PST Sat Jan 2 2021 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SUNDAY NIGHT THROUGH LATE MONDAY NIGHT ABOVE 5000 FEET... * WHAT...Heavy snow possible above 5000 feet. Total snow accumulations of 8 to 16 inches possible. Winds could gust as high as 60 mph in exposed areas. * WHERE...Western Siskiyou County, South Central Siskiyou County and North Central and Southeast Siskiyou County to include Etna Summit and Sawyers Bar Road, Everitt Memorial Highway, and Mount Shasta Ski Park. * WHEN...From late Sunday night through late Monday night. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Snow levels will lower Monday night, so there is a small chance (25 percent) for snow impacts below 5000 feet to include portions of Interstate 5 and Highway 89. Confidence is medium on snow levels and will continue to evaluate latest data. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Stock emergency kit with tire chains, flashlight, batteries, blankets, food, water, and medications. * The safest place during a winter storm is indoors. * Plan now to avoid traveling during the storm. * A Winter Storm Watch means there is potential for significant snow accumulations that may create dangerous travel. && $$ Visit us at https://www.weather.gov/Medford
076 WWUS46 KMFR 022149 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 149 PM PST Sat Jan 2 2021 CAZ080-082-083-031600- /O.UPG.KMFR.WS.A.0001.210104T1200Z-210105T1200Z/ /O.NEW.KMFR.WS.W.0001.210104T1200Z-210105T1200Z/ Western Siskiyou County-South Central Siskiyou County- North Central and Southeast Siskiyou County- 149 PM PST Sat Jan 2 2021 ...WINTER STORM WARNING IN EFFECT FROM 4 AM MONDAY TO 4 AM PST TUESDAY ABOVE 5000 FEET... * WHAT...Heavy snow expected above 5000 feet. Total snow accumulations of 8 to 15 inches. Winds gusting as high as 50 mph except near the highest elevations which will see gusts to 70 mph. * WHERE...Higher terrain of Siskiyou County, including portions of Sawyers Bar Road, Highway 3, Mt. Shasta Ski Park, and other rural locations. Highway 97, although included in the warning, will see amounts closer to 3 to 6 inches of snow. * WHEN...From 4 AM Monday to 4 AM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact travel. Very strong winds could cause tree damage. * 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. && $$ ORZ027-031600- /O.NEW.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ /O.EXT.KMFR.WW.Y.0002.210103T0000Z-210103T2100Z/ South Central Oregon Cascades- Including the city of Crater Lake 149 PM PST Sat Jan 2 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 1 PM PST SUNDAY ABOVE 5000 FEET... ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...For the first Winter Weather Advisory, snow expected above 5000 feet. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 60 mph in areas of exposed higher terrain. For the second Winter Weather Advisory, moderate snow expected above 4000 feet. Total snow accumulations of 5 to 10 inches. Winds gusting as high as 40 mph. * WHERE...Both advisories are for the southern Oregon Cascades from Crater Lake to areas of Willamette Pass Ski Resort, including Diamond Lake. The advisories also include portions of Highway 62, 138, and 230 * WHEN...The first Winter Weather Advisory is from 4 PM this afternoon to 1 PM PST Sunday. The second Winter Weather Advisory is from 7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. Strong winds will cause reduced visibilities and tree damage. * ADDITIONAL DETAILS...These advisories highlight the highest snowfall rates during a 3 day-long snow event. Thus, expect light snow before and after the advisory time frames. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ028-031600- /O.NEW.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ Siskiyou Mountains and Southern Oregon Cascades- 149 PM PST Sat Jan 2 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...Snow expected above 4000 feet. Total snow accumulations of 5 to 9 inches. Winds gusting as high as 50 mph except for Mt. Ashland which will see gusts as high as 65 mph. * WHERE...Portions of the Southern Oregon Cascades and Siskiyous including Highway 140 at Lake of the Woods Pass and the Mt. Ashland Ski area as well as the road to Mt. Ashland. * WHEN...From 7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...The heaviest snow should occur between 10 AM Monday through 10 PM Monday. * 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. && $$ Visit us at https://www.weather.gov/Medford
169 WWUS46 KMFR 031227 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 427 AM PST Sun Jan 3 2021 CAZ080-082-083-032230- /O.CON.KMFR.WS.W.0001.210104T1200Z-210105T1200Z/ Western Siskiyou County-South Central Siskiyou County- North Central and Southeast Siskiyou County- 427 AM PST Sun Jan 3 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM MONDAY TO 4 AM PST TUESDAY ABOVE 5000 FEET... * WHAT...Heavy snow expected above 5000 feet. Total snow accumulations of 10 to 20 inches, except 3 to 6 inches along higher elevation portions of Highway 97. Winds gusting as high as 50 mph except near the highest elevations which will see gusts to 70 mph. * WHERE...Higher terrain of Siskiyou County, including portions of Sawyers Bar Road, Highway 3, Grass Lake, Mt. Shasta Ski Park, and other rural locations. * WHEN...From 4 AM Monday to 4 AM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact travel. Very strong winds could cause tree damage. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Travel is strongly discouraged because of dangerous conditions. * If you must travel, keep tire chains, a flashlight, blankets, food, water, medications, and a fully charged phone with you. * The safest place during a winter storm is indoors. * A Winter Storm Warning means that severe winter weather is likely and poses a threat to life and property. Take protective action now. && $$ ORZ029-030-032230- /O.EXB.KMFR.WW.Y.0003.210104T2100Z-210105T0600Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 427 AM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TO 10 PM PST MONDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. Winds gusting as high as 35 mph Monday afternoon in exposed areas. * WHERE...Higher elevations of Highway 97 including near Modoc Point, Spring Creek Grade, Sand Creek, and Chemult. * WHEN...From 1 PM to 10 PM PST Monday. * IMPACTS...Plan on slippery road conditions. * 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. && $$ ORZ027-032230- /O.CON.KMFR.WW.Y.0002.000000T0000Z-210103T2100Z/ /O.CON.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ South Central Oregon Cascades- Including the cities of Crater Lake and Diamond Lake 427 AM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON ABOVE 5000 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...For the first Winter Weather Advisory, snow expected above 5000 feet. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 60 mph in areas of exposed higher terrain. For the second Winter Weather Advisory, moderate snow expected above 4000 feet. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 40 mph in exposed areas. * WHERE...Both advisories are for the southern Oregon Cascades from Crater Lake to areas of Willamette Pass Ski Resort, including Diamond Lake. The advisories also include portions of Highway 62, 138, and 230. * WHEN...The first Winter Weather Advisory is until 1 PM PST this afternoon. The second Winter Weather Advisory is from 7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Travel could become very difficult. Strong winds will cause reduced visibilities and tree damage. * ADDITIONAL DETAILS...These advisories highlight the periods of heaviest snowfall. Thus, expect light snow between the two advisories. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ028-032230- /O.CON.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ Siskiyou Mountains and Southern Oregon Cascades- 427 AM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...Snow expected above 4000 feet. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 50 mph except for Mt. Ashland which will see gusts as high as 65 mph. * WHERE...Portions of the Southern Oregon Cascades and Siskiyous including Highway 140 at Lake of the Woods Pass and the Mt. Ashland Ski area as well as the road to Mt. Ashland. A period of accumulating snowfall is possible at Siskiyou Summit on Interstate 5 between late Monday morning and Monday night. * WHEN...From 7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...The heaviest snow should occur from 10 AM Monday through 10 PM Monday. * 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. && $$ Visit us at https://www.weather.gov/Medford
214 WWUS46 KMFR 032047 WSWMFR URGENT - WINTER WEATHER MESSAGE National Weather Service Medford OR 1247 PM PST Sun Jan 3 2021 ORZ027-041430- /O.EXP.KMFR.WW.Y.0002.000000T0000Z-210103T2100Z/ /O.CON.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ South Central Oregon Cascades- Including the cities of Crater Lake and Diamond Lake 1247 PM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...Snow expected above 4000 feet. Total snow accumulations of 3 to 11 inches. Winds gusting as high as 60 mph. * WHERE...The southern Oregon Cascades from Crater Lake to areas of Willamette Pass Ski Resort, including Diamond Lake. The advisories also include portions of Highway 62, 138, and 230. * WHEN...7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * ADDITIONAL DETAILS...The ongoing winter weather advisory at 5000 feet will expire at 1 PM today. The next winter weather advisory starts at 7 AM Monday. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ CAZ080-082-083-041430- /O.CON.KMFR.WS.W.0001.210104T1200Z-210105T1200Z/ Western Siskiyou County-South Central Siskiyou County- North Central and Southeast Siskiyou County- 1247 PM PST Sun Jan 3 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM MONDAY TO 4 AM PST TUESDAY ABOVE 5000 FEET... * WHAT...Heavy snow expected above 5000 feet. Total snow accumulations of 10 to 20 inches, except 3 to 6 inches along higher elevation portions of Highway 97. Winds gusting as high as 50 mph except near the highest elevations which will see gusts to 70 mph. * WHERE...Higher terrain of Siskiyou County, including portions of Sawyers Bar Road, Highway 3, Grass Lake, Mt. Shasta Ski Park, and other rural locations. * WHEN...From 4 AM Monday to 4 AM PST Tuesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact travel. Very strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow could start along the higher elevations of Highway 97 as early as 10 AM Monday. * 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. && $$ ORZ029-030-041430- /O.CON.KMFR.WW.Y.0003.210104T2100Z-210105T0600Z/ Klamath Basin- Northern and Eastern Klamath County and Western Lake County- Including the city of Chemult 1247 PM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM TO 10 PM PST MONDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. Winds gusting as high as 35 mph Monday afternoon in exposed areas. * WHERE...Higher elevations of Highway 97 including near Modoc Point, Spring Creek Grade, Sand Creek, and Chemult. * WHEN...From 1 PM to 10 PM PST Monday. * IMPACTS...Plan on slippery road conditions. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties. && $$ ORZ028-041430- /O.CON.KMFR.WW.Y.0003.210104T1500Z-210105T0900Z/ Siskiyou Mountains and Southern Oregon Cascades- 1247 PM PST Sun Jan 3 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM MONDAY TO 1 AM PST TUESDAY ABOVE 4000 FEET... * WHAT...Snow expected above 4000 feet. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 50 mph except for Mt. Ashland which will see gusts as high as 65 mph. * WHERE...Portions of the Southern Oregon Cascades and Siskiyous including Highway 140 at Lake of the Woods Pass and the Mt. Ashland Ski area as well as the road to Mt. Ashland. A period of accumulating snowfall is possible at Siskiyou Summit on Interstate 5 between late Monday morning and Monday night. * WHEN...From 7 AM Monday to 1 AM PST Tuesday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...The heaviest snow should occur from 10 AM Monday through 10 PM Monday. * 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
What forecasters said that day
The local office's own words before this winter weather advisory 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 weather advisory went out at Jan 1, 8:27 AM PST, 4 hours 16 minutes earlier.
Area forecast discussion, Jan 1, 8:27 AM PST, 4 hours 16 minutes before
Area Forecast Discussion
National Weather Service Medford OR
827 AM PST Fri Jan 1 2021
.DISCUSSION...Satellite imagery shows cloud cover draping across
the entirety of our area ahead of a frontal system that is coming
in. Although radar is showing limited returns near Drain/Elkton,
it is likely not nothing is reaching the ground yet. This will
change as the front moves in and falls apart today. The current
forecast looks well enough on track, so am not going to make any
changes.
The main challenge today will be deciding any winter hazards
along with the other hazards ongoing for the weekend systems,
which appears to be a longer duration event. More information is
detailed nicely in the previous discussion below, and I encourage
you to read it. -Schaaf
&&
.PREV DISCUSSION... /Issued 437 AM PST Fri Jan 1 2021/
DISCUSSION...A series of storms will impact the forecast area through
the next 7+ days, bringing periods of heavy rain, windy
conditions, and mountain snowfall. Much of the rain and snowfall
will be beneficial given the ongoing drought conditions, but there
will be some hydrological hazards and impacts to mountain pass
travel. We've observed over the past few days that the collective
of model data has trended warmer and wetter for our forecast
area. This means higher snow levels, impacting primarily
elevations 4500 feet and higher, and heavier rainfall and more
runoff that will bring significant rises to area rivers and
streams.
Drilling down into some details, a front of moderate strength will
push into the forecast area this afternoon, bringing gusty winds and
moderate to heavy rainfall (heavy rainfall focused at the coast and
especially south of Cape Blanco) and mountain snowfall. Snow levels
will bump up to about 7000 feet this afternoon, and this will likely
be as high as snow levels get for the next week or so. A brief
round of impactful snowfall is expected in the mountains,
generally above 4500 feet, late this afternoon into the evening as
the cold front passes through. Additionally, enough cold air
aloft behind the front will bring Lifted Index values to near zero
late this afternoon and evening, generally sufficient for a few
thunderstorms over the waters or just inland.
Not much of a break is expected in precipitation Saturday morning,
especially in the high terrain, before the next front arrives
Saturday afternoon. This front will feature strong south to north
pressure gradients and 50kt+ southwest winds at 10000ft, and this
means a windy period Saturday afternoon through Sunday night at
least. Both the Canadian/American and European ensemble solutions
suggest Integrated Vapor Transport (good measurement of moisture
pointed at forecast area) values at 500+, and this is top 10
percent for this time of year. These high values linger over the
forecast area from late Saturday through Sunday night as multiple
low pressure centers form and move along the front. There will
likely be two periods of high winds at the coast and portions of
the East Side-- Saturday night and again Sunday night. These will
be timed with the approach of both low pressure centers. Snow
levels through these heavier periods of precipitation will
generally be 5000+ feet, so significant snow impacts should be
above Siskiyou Summit...again, different than the models looked a
few days ago. Lastly, these types of patterns, with deep and
strong southwesterly flow, generally feature breaks in
precipitation and warmer conditions in valleys like the Rogue. We
won't be surprised to see temperatures bump into the 50s in the
Medford area.
Long-term from previous discussion...Mon Jan 4 through Thu Jan 6,
2021...Models and ensembles continue to show that an active and
wet pattern is likely through at least mid next week. A strong and
wet front will move across the area on Monday with rain and
mountain snow expected. Snow levels initially near 5000 to 5500
feet are expected to lower to 4000 to 4500 feet during the day
Monday. Model and ensemble solutions show good agreement and
continue to support the potential for moderate snow accumulations
across higher passes in the Cascades on Monday. Heaviest snow
accumulations are expected above 4500 feet in the Cascades.
Strong, gusty south winds are forecast to continue over the
mountains Sunday night into Monday, gradually lowering during the
afternoon and evening as the front shifts east. Gusty winds may
also continue on Monday for the Summer Lake area and southern
Shasta Valley, lowering in the afternoon and evening.
After a brief break on Tuesday, the active pattern continues Tuesday
night and Wednesday. Models and ensembles show good agreement that
another strong front will move gradually into the area Tuesday night
followed by a surface low on Wednesday. The parent low associated
with the front is expected to move inland into British Columbia but
the GFS, ECMWF and many of the ensemble solutions show a second low
developing to the west and moving into the southern end of the
front, before moving inland into the southern Oregon and northern
California coast on Wednesday. There is low confidence on the exact
track and strength of this low which will be a significant factor
into how much precipitation the area receives and how strong winds
will be. The main concern with this system is that will bring
another round of moderate (and possibly locally heavy)
precipitation. The stronger solutions for the low would also
indicate the potential for strong gusty winds. Snow levels are
forecast to be in the 3500 to 4000 ft range, so with moderate
precipitation there is a chance for significant snow accumulations
to affect most passes in the Cascades and Siskiyous as well as the
mountains in western Siskiyou County. Areas east of the Cascades
could also see some light to moderate snow with this event. Given
the lower confidence in the track and strength of the low, the
exact details are not certain. We will continue to monitor and
evaluate the potential for impacts with this storm.
In addition to individual storm impact, the long period of moderate
to occasionally heavy precipitation from a train of storms this
weekend into next week will bring significant precipitation,
especially to coastal areas and the Umpqua Basin. This is forecast
to bring significant rises on rivers, especially in Curry and Coos
Counties, next week. We have issued a hydrologic outlook for the
potential of significant rises on mainstem rivers as well as the
potential for small stream flooding with these storms. Please see
the ESFMFR for details. -CC
HYDROLOGY...An active and wet pattern containing a strong
atmospheric river will bring widespread rainfall to the region
this weekend into early next week. Small streams and creeks will
likely rise significantly during this active weather pattern. More
rain is expected in the middle of next week, but confidence is
low in the details for where the heaviest rain will fall. This
extended period of wet weather through mid week may result in some
main stem rivers nearing bankfull, particularly the coastal
rivers, including the Chetco and Coquille Rivers, and some of our
more flashy creeks such as Deer Creek near Roseburg.
AVIATION...For the 01/12Z TAFs...A warm front will brush by
this morning, with some light rain and drizzle mainly over the
coastal waters. This warm front is likely to result in a variety of
conditions across the area due to lingering moisture, clouds from
the warm front, and breaks in the cloud cover. There is low
confidence for how much IFR clouds and fog form in the Oregon
western valleys this morning because of competing factors of lots of
low level moisture but with a VFR/MVFR ceilings above. The focus for
any IFR conditions will be between 14z and 18z.
A fairly strong and fast moving cold front is likely to reach KOTH
between 1 and 2 pm, then KRBG around 3 pm, KMFR near or just after 4
pm, and KLMT between 5 and 6 pm. Some wind shear is expected along
and near the coast late this morning into the early afternoon
followed by a mix of MVFR and IFR in moderate to heavy rain as the
front moves through. Mainly VFR conditions inland this afternoon and
evening except for brief MVFR conditions near the frontal passage.
Sandler
MARINE...Updated 420 AM PST Friday, 1 Jan 2020...A new very long
20 to 25 second period swell will build today. Light showers in
southerly flow will increase to moderate to heavy rain this
afternoon as a cold front moves through. Gale force wind gusts are
expected from about Pistol River northward. Westerly swell is likely
to follow the front, peaking around 20 feet at 19 seconds Saturday
morning.
Saturday into Saturday night another strong frontal system will move
through the waters with gales likely and even storm force winds
possible from the Cape Blanco area northward. A gale watch remains
in effect for this front.
Large, hazardous seas in the 15 to 25 foot range are likely from the
3rd into the 6th of January as two to three more strong frontal
systems move through. Model guidance has trended further north and
west with the strengthening low Sunday night into Monday. Strong
gales to low end storm force winds currently appear most likely with
that frontal system.
Sandler/BTL
BEACH HAZARDS...Updated 845 PM PST Thursday, 31 Dec 2020... High
surf is expected to continue for much of the next week as
multiple storm systems move through the region. Breaking wave
heights will subside into today to around 15 feet before a new
long period swell builds them back into the 15 to 25 foot range
this evening through Saturday morning. Breaking wave heights for
this next round of very long period swell are then likely to peak
in the 25 to 30 foot range on the morning of the 2nd.
Additional strong frontal system activity across the northeastern
Pacific from the 3rd through the 7th will bring at least 2 more
large surf events to the area with breaking wave heights peaking at
about 30 feet with each of these events. Currently, the timing of
the peak of those two large breaking wave events is the night of the
3rd and the late afternoon to evening of the 6th of January.
Use extra caution along and near the immediate coast, especially
along and near beaches, rocks, jetties, and bar entrances during
this period of significant waves, as the Pacific is both cold and
powerful. These large waves can easily sweep people and large
objects into the water. ~BTL
HYDROLOGY...An active and wet pattern containing a strong
atmospheric river will bring widespread rainfall to the region
this weekend into early next week. Small streams and creeks will
likely rise significantly during this active weather pattern. More
rain is expected in the middle of next week, but confidence is
low in the details for where the heaviest rain will fall. This
extended period of wet weather through mid week may result in some
main stem rivers nearing bankfull, particularly the coastal
rivers, including the Chetco and Coquille Rivers, and some of our
more flashy creeks such as Deer Creek near Roseburg.
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...High Surf Advisory from 4 PM this afternoon to 4 PM PST Sunday
for ORZ021-022.
High Wind Watch from Saturday afternoon through late Sunday
night for ORZ021-022.
Wind Advisory from 4 PM this afternoon to 1 AM PST Saturday for
ORZ031.
High Wind Watch from Saturday evening through late Sunday night
for ORZ031.
CA...Wind Advisory from 1 PM this afternoon to 10 PM PST this evening
for CAZ081.
Pacific Coastal Waters...Gale Watch from Saturday afternoon through late Saturday night
for PZZ350-356-370-376.
Small Craft Advisory until 4 PM PST this afternoon for
PZZ350-356-370-376.
Gale Warning until 4 PM PST this afternoon for
PZZ350-356-370-376.
Hazardous Seas Warning from 4 PM this afternoon to 1 PM PST
Saturday 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 1, 1:05 PM PST | High Wind Warning | MFR | Coos, Curry, Douglas, Klamath, Lake | 3 days |
| Jan 1, 1:05 PM PST | Wind Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine, Klamath and 1 more | 3 days |
| Jan 1, 2:28 PM PST | Gale Warning | MFR | 36 hr | |
| Jan 1, 2:28 PM PST | Storm Warning | MFR | 36 hr |
Nearby
Winter Weather Advisories in Oregon, 2021Every winter weather advisory 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.