A strong low pressure system dropped south out of British Columbia bringing cold air and heavy snow to the south Washington Cascades and foothills.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PQR wrote it up.
A strong low pressure system dropped south out of British Columbia bringing cold air and heavy snow to the south Washington Cascades and foothills.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Portland, OR wrote its last area forecast discussion before the first event at Nov 22, 3:07 AM PST, 3 hours 53 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PORTLAND OR 555 AM PST MON NOV 22 2010 ORZ001-002-007-008-WAZ021-231500- NORTH OREGON COAST-CENTRAL OREGON COAST-CENTRAL WILLAMETTE VALLEY- SOUTH WILLAMETTE VALLEY-SOUTH WASHINGTON COAST- 555 AM PST MON NOV 22 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OREGON AND SOUTHWEST WASHINGTON. .DAY ONE...TODAY AND TONIGHT A COLD SYSTEM FROM BRITISH COLUMBIA WILL BRING THE POTENTIAL FOR LIGHT SNOW ACCUMULATIONS UP TO 2 INCHES LATER THIS AFTERNOON AND EVENING WHEN SNOW LEVELS FALL TO SEA LEVEL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MODIFIED ARCTIC AIR WILL BRING COLD TEMPERATURES TUESDAY THROUGH WEDNESDAY WITH LOW TEMPERATURES BELOW FREEZING AT THE COAST... AND IN THE 20S AND LOCALLY UPPER TEENS INLAND VALLEYS. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF SNOW ARE ENCOURAGED TODAY. ORZ003>006-010>014-WAZ019-020-022-039-040-231500- COAST RANGE OF NORTHWEST OREGON- CENTRAL COAST RANGE OF WESTERN OREGON-LOWER COLUMBIA- GREATER PORTLAND METRO AREA-NORTHERN OREGON CASCADE FOOTHILLS- NORTHERN OREGON CASCADES-CASCADE FOOTHILLS IN LANE COUNTY- CASCADES IN LANE COUNTY-UPPER HOOD RIVER VALLEY- SOUTH WASHINGTON CASCADES-WILLAPA HILLS-I- 5 CORRIDOR IN COWLITZ COUNTY-GREATER VANCOUVER AREA- SOUTH WASHINGTON CASCADE FOOTHILLS- 555 AM PST MON NOV 22 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OREGON AND SOUTHWEST WASHINGTON. .DAY ONE...TODAY AND TONIGHT WINTER WEATHER ADVISORY FOR SNOW IN EFFECT UNTIL 10 PM THIS EVENING AS ANOTHER COLD SYSTEM DROPS SOUTH OUT OF BRITISH COLUMBIA. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MODIFIED ARCTIC AIR WILL BRING COLD TEMPERATURES TUESDAY THROUGH WEDNESDAY...WITH VALLEY LOW TEMPERATURES IN THE 20S AND LOCALLY UPPER TEENS. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF SNOW ARE ENCOURAGED TODAY. ORZ009-WAZ023-231500- WESTERN COLUMBIA RIVER GORGE- 555 AM PST MON NOV 22 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OREGON AND SOUTHWEST WASHINGTON. .DAY ONE...TODAY AND TONIGHT WINTER STORM WARNING FOR SNOW IN EFFECT UNTIL 10 PM THIS EVENING AS ANOTHER COLD SYSTEM DROPS SOUTH OUT OF BRITISH COLUMBIA. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MODIFIED ARCTIC AIR WILL BRING COLD TEMPERATURES TUESDAY THROUGH WEDNESDAY...WITH LOW TEMPERATURES BETWEEN 15 AND 25 DEGREES. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF SNOW ARE ENCOURAGED TODAY.
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</html>2 heavy snow. Local standard time, as filed.
The Sheep Canyon SNOTEL site measured 15 inches of new snow between 07:00 PST and 16:00 PST on November 22nd. Other reports of heavy snow were 13 inches at the Spirit Lake SNOTEL, the Surprise Lakes SNOTEL and the Swift Creek SNOTEL between 08:00 PST and 22:00 PST on November 22nd.
The Calamity SNOTEL site measured 13 inches of new snow between 07:00 PST and 18:00 PST on November 22nd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2010Every state in 2010This day in weather historyWarnings in Washington, November 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 268505, 268506.