Tracking Washington state’s snowpack through maps and charts

Washington’s rivers, lakes and reservoirs rely on mountain snow to supply water into the summer months. The state’s agriculture and outdoor recreation industries also depend on the snowpack for irrigation and water for salmon and other fish habitat. The annual snow season lasts from October to May.

From mid-February to Mid-April, this season’s snowpack has been well above the 30-year norm (1981-2010) for most of Washington. Warmer temperatures in late April caused the snowpack in some basins east of the Cascade Mountains to melt early. The first week of May is seeing the The Lower Yakima Basin under 60% for the 30-year norm. The Spokane and Lower Snake are both dropping to 70% of norm for the month of May.

Track the current snowpack season though maps and charts below, which will be updated as the season progresses.

DECEMBER SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

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JANUARY SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

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FEBRUARY SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

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MARCH SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

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APRIL SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

MAY SNOWPACK

Comparing 2021’s snowpack to the past season’s for select basins on the first reading of the day. The annual snow season last from October to May.

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SNOWPACK AT SNOQUALMIE AND STEVENS PASSES

Figures are for the amount of snow on the ground in inches, measured at 6 a.m. each day. The number increases or decreases as the seasonal snowpack changes. The snow season is from October to May.