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Washington Snow Survey Program

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Washington Water Supply Outlook –
April 1, 2013

Washington received normal mountain snowfall for much of March however come the final week of the month above normal temperatures dominated the region. Snow pack appears to have reached its’ apex in most areas and has begun to melt and fill rivers and streams. The general rule is that April 1 usually marks the peak of snow accumulation however as with all averages we once again broke the rules with heavy mountain snowfall on April 7-8. Accumulations of up to 21 inches were reported in the south-central Cascade Range. Weather forecasts are calling for slightly below normal temperatures but equal chances of below, normal or above average precipitation over the next few months. The Climate Prediction Center has announced the continuation of Enso neutral conditions for the foreseeable future. Cooler temperatures will be good news for a slow sustainable melt cycle. The April 1 statewide SNOTEL readings were 112%, down slightly from last month. During the month of March, the National Weather Service and Natural Resources Conservation Service climate stations reported below normal precipitation in all river basins with the exception of the northwest corner and the western Olympics which reported slightly above normal.

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Snow Survey Data, Products, and Reports

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Snow & Precipitation

 

Photo of typical SNOTEL site SNOTEL Data & Products

Updated information specific to SNOTEL sites. i.e. SWE, snow depth, temperature, precipitation, soil moisture, etc.

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Water Supply

Streamflow forecasts, reservoir storage, surface water supply index, etc...

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Site Information

Data site locations, descriptions, maps, index

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Climate

Soil moisture/temperature data, Fire weather data, Climate summaries by county

 

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Recreation

Weekly snow depth reports


Additional Snow Survey Information & Quick Links