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Thunder Basin SNOTEL

No snow sat on the pillow at Thunder Basin at the start of October 4, 2026. The NRCS median first snow is November 5, and the median peak is 30.4 in around April 6.

as of

All values are from the start of the day, midnight Pacific Standard Time

Last 8 days

Start-of-day readings for Thunder Basin, last 8 days.
DateSWEMedianPercentDepthPrecip since Oct 1
Oct 40.0 inches0.0 inches0 inches
Oct 30.0 inches0.0 inches0 inches
Oct 20.0 inches0.0 inches0 inches0.0 inches
Oct 10.0 inches0.0 inches0 inches0.0 inches
Sep 300.0 inches0.0 inches0 inches84.6 inches
Sep 290.0 inches0.0 inches0 inches83.3 inches
Sep 280.0 inches0.0 inches0 inches83.3 inches
Sep 270.0 inches0.0 inches0 inches83.3 inches

The Natural Resources Conservation Service (USDA) created the figures on this page, which are works of the US government and therefore have no copyright under 17 U.S.C. 105. The notice that 17 U.S.C. 403 requires appears in this sentence. Neither NRCS nor USDA endorses or is affiliated with WeatherTotals. See: Data sources and attribution.

Records at Thunder Basin

Record values for Thunder Basin, from daily snowpack history.
Highest SWE on record48.4 inches, April 11, 1999
Deepest snow on record122 inches, March 21, 2012
Biggest season peak48.4 in, 1998-99 season, on April 11, 1999
Smallest season peak16.1 in, 2014-15 season, on March 22, 2015
Last season's peak25.3 in, 2025-26 season, on March 16, 2026

37 complete water years in the record, daily SWE since October 1, 1988

Station details

Elevation4,310 ft
CountySkagit
Position48.5275, -120.9895
Record startsSeptember 30, 1987
Median peak SWE30.4 in around April 6
Median first snowNovember 5
Median melt-outJune 8
NRCS station ID817:WA:SNTL

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