Alert archive / Oregon / Winter Storm Warnings in 2021
Winter Storm Warning 5, NWS Pendleton, OR
NWS Pendleton, OR issued this winter storm warning at Dec 10, 2021, 10:03 AM PST for Columbia County, Walla Walla County, Washington; 6 counties in Oregon. It took effect at Dec 10, 2021, 6:00 PM PST. It was in force for 34 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 10, 2021, 10:03 AM PST (18:03 UTC)
- In effect from
- Dec 10, 2021, 6:00 PM PST
- Expired
- Dec 12, 2021, 4:00 AM PST
- In force
- 34 hr
- Issued by
- NWS Pendleton, OR
Counties Deschutes County, OR, Jefferson County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wasco County, OR, Columbia County, WA, Walla Walla County, WA
The radar
The Pendleton radar (KPDT), 49 km from the middle of the area, began a volume at 18:03 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
Salem/Mcnary, OR (KSLE), launched 12:00Z, 6.1 hours before the alert went out and 299 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
- 649 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
936 WWUS46 KPDT 101803 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 1003 AM PST Fri Dec 10 2021 ORZ502-WAZ030-110700- /O.EXP.KPDT.WW.Y.0025.000000T0000Z-211210T1800Z/ /O.UPG.KPDT.WS.A.0004.211211T1500Z-211213T0000Z/ /O.NEW.KPDT.WS.W.0005.211211T0600Z-211212T1200Z/ Northern Blue Mountains of Oregon-Northwest Blue Mountains- Including the cities of Meacham, Tollgate, and Ski Bluewood Resort 1003 AM PST Fri Dec 10 2021 ...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST SUNDAY ABOVE 3500 FEET... ...WINTER WEATHER ADVISORY HAS EXPIRED... * WHAT...Heavy snow expected above 3500 feet. Total snow accumulations of 9 to 16 inches. Winds gusting as high as 35 mph. * WHERE...In Washington, Northwest Blue Mountains. In Oregon, Northern Blue Mountains of Oregon. * WHEN...From 10 PM this evening to 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WAZ520-110700- /O.UPG.KPDT.WS.A.0004.211211T0000Z-211213T0000Z/ /O.NEW.KPDT.WS.W.0005.211211T0200Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 1003 AM PST Fri Dec 10 2021 ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 4 AM PST SUNDAY ABOVE 2500 FEET... * WHAT...Heavy snow expected above 2500 feet. Total snow accumulations of 12 to 24 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Washington Cascades. * WHEN...From 6 PM this evening to 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ509-110700- /O.UPG.KPDT.WS.A.0004.211211T1500Z-211213T0000Z/ /O.NEW.KPDT.WS.W.0005.211211T0600Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 1003 AM PST Fri Dec 10 2021 ...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST SUNDAY ABOVE 4000 FEET... * WHAT...Heavy snow expected above 4000 feet. Total snow accumulations of 10 to 21 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...From 10 PM this evening to 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
5 follow-up statements
625 WWUS46 KPDT 110646 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 1046 PM PST Fri Dec 10 2021 WAZ520-111500- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 1046 PM PST Fri Dec 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Total snow accumulations of 12 to 24 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Washington Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ502-WAZ030-111500- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ Northern Blue Mountains of Oregon-Northwest Blue Mountains- Including the cities of Meacham, Tollgate, and Ski Bluewood Resort 1046 PM PST Fri Dec 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 3500 FEET... * WHAT...Heavy snow above 3500 feet. Total snow accumulations of 9 to 16 inches. Winds gusting as high as 45 mph. * WHERE...In Washington, Northwest Blue Mountains. In Oregon, Northern Blue Mountains of Oregon. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ509-111500- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 1046 PM PST Fri Dec 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 4000 FEET... * WHAT...Heavy snow above 4000 feet. Total snow accumulations of 10 to 20 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
207 WWUS46 KPDT 111146 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 346 AM PST Sat Dec 11 2021 WAZ520-112300- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 346 AM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Total snow accumulations of 12 to 24 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Washington Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ502-WAZ030-112300- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ Northern Blue Mountains of Oregon-Northwest Blue Mountains- Including the cities of Meacham, Tollgate, and Ski Bluewood Resort 346 AM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 3500 FEET... * WHAT...Heavy snow above 3500 feet. Total snow accumulations of 9 to 16 inches. Winds gusting as high as 45 mph. * WHERE...In Washington, Northwest Blue Mountains. In Oregon, Northern Blue Mountains of Oregon. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ509-112300- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 346 AM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 4000 FEET... * WHAT...Heavy snow above 4000 feet. Total snow accumulations of 10 to 20 inches. Winds gusting as high as 45 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
440 WWUS46 KPDT 112246 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 246 PM PST Sat Dec 11 2021 WAZ520-120800- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 246 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of 8 to 14 inches. Winds gusting as high as 35 mph. * WHERE...East Slopes of the Washington Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ502-WAZ030-120800- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ Northern Blue Mountains of Oregon-Northwest Blue Mountains- Including the cities of Meacham, Tollgate, and Ski Bluewood Resort 246 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 3500 FEET... * WHAT...Heavy snow above 3500 feet. Additional snow accumulations of 8 to 14 inches. Winds gusting as high as 25 mph. * WHERE...In Washington, Northwest Blue Mountains. In Oregon, Northern Blue Mountains of Oregon. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ509-120800- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 246 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 4000 FEET... * WHAT...Heavy snow above 4000 feet. Additional snow accumulations of 8 to 16 inches. Winds gusting as high as 30 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
995 WWUS46 KPDT 120338 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 738 PM PST Sat Dec 11 2021 ORZ502-WAZ030-120445- /O.CAN.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ Northern Blue Mountains of Oregon-Northwest Blue Mountains- 738 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING IS CANCELLED... There could be some additional snowfall overnight of around 2 to 4 inches but heavy snowfall is no longer expected. $$ WAZ520-121200- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 738 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 2500 FEET... * WHAT...Heavy snow above 2500 feet. Additional snow accumulations of up to 5 inches mainly along the Cascade crest with lighter amounts along the east slopes. * WHERE...East Slopes of the Washington Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ ORZ509-121200- /O.CON.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 738 PM PST Sat Dec 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SUNDAY ABOVE 4000 FEET... * WHAT...Heavy snow above 4000 feet. Additional snow accumulations of 4 to 8 inches mainly along the Cascade crest with lighter amounts along the east slopes. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 4 AM PST Sunday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
605 WWUS46 KPDT 121145 WSWPDT URGENT - WINTER WEATHER MESSAGE National Weather Service Pendleton OR 345 AM PST Sun Dec 12 2021 WAZ520-121245- /O.EXP.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Washington Cascades- Including the city of Cliffdell 345 AM PST Sun Dec 12 2021 ...WINTER STORM WARNING WILL EXPIRE AT 4 AM PST EARLY THIS MORNING ABOVE 2500 FEET... The heaviest snowfall has moved out of the area this morning, however another few inches of snowfall are possible along the crests today as several lighter bands move across. $$ ORZ509-121245- /O.EXP.KPDT.WS.W.0005.000000T0000Z-211212T1200Z/ East Slopes of the Oregon Cascades- Including the cities of La Pine and Sunriver 345 AM PST Sun Dec 12 2021 ...WINTER STORM WARNING WILL EXPIRE AT 4 AM PST EARLY THIS MORNING ABOVE 4000 FEET... The heaviest snowfall has moved out of the area this morning, however another few inches of snowfall are possible along the crests today as several lighter bands move across. $$
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 2:08 PM PST | Wind Advisory | PDT | Benton, Columbia, Franklin, Klickitat, Walla Walla, Yakima | 26 hr |
Nearby
Winter Storm Warnings in Oregon, 2021Winter Storm Warnings in Washington, 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.