Heavy Snow, East Slopes Southern Cascades
- When
- December 27, 7:00 AM PST to 7:00 PM PST
- Where
- East Slopes Southern Cascades forecast zone
- Reported by
- TRAINED SPOTTER
Nearly 18 inches of snow fell along Interstate 90 at Snoqualmie Pass before changing to sleet and freezing rain. Up to ten inches of snow fell in the East Slopes of the southern Washington Cascades and up to three inches of snow fell in the Kittitas valley before it changed to rain during the afternoon.
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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 PDT wrote it up.
Nearly 18 inches of snow fell along Interstate 90 at Snoqualmie Pass before changing to sleet and freezing rain. Up to ten inches of snow fell in the East Slopes of the southern Washington Cascades and up to three inches of snow fell in the Kittitas valley before it changed to rain during the afternoon. Washington Department of Transportation closed Interstate 90 through Snoqualmie Pass and Highway 2 through Stevens Pass by early afternoon because of avalanche danger. Both roads are major traffic routes to Seattle. As many as 3,000 holiday travellers spent the night in Cle Elum and 6,000 in Ellensburg. Central Washington University in Ellensburg opened 800 dorm rooms for stranded travellers. By early evening, hotels were full and the American Red Cross set up shelters. Up to 800 people stayed in Red Cross shelters while others spent the night in their vehicles. The roads through the passes were opened around noon on the 28th after the snow was removed and avalanche control measures were taken.
The national radar mosaic for the moment the first event began.
2 heavy snow. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 1998Every state in 1998This day in weather historyWarnings in Washington, December 1998
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 2026-09-24. Each event’s entry at NCEI: 5675527, 5675528.