Washington State Climate Office at the University of Washington; WA climate and weather tidbits
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ALT An image of the official WASCO BlueSky account with the handle @wastateclimate.bsky.social
ALT The Climate Prediction Center's 6-10 day precipitation outlook favors below-normal to normal precipitation chances for the West, East, and much of the Northern and Central Plains. Above-normal precipitation chances are favored for part of the Southern Plains, Upper Midwest, Hawaii, and Alaska.
ALT The Climate Prediction Center's 6-10 day temperature outlook favors above-normal temperature for the West and most of the Plains and below-normal chances for the East.
ALT Snow Telemetry (SNOTEL) snow water equivalent (SWE) values for watersheds in the western U.S. as a percentage of the 1991–2020 median recorded by the USDA Natural Resources Conservation Service. The map shows below-normal SWE for the most of the western United States.
ALT The change in SWE at SNOTEL stations from midnight on December 7th to midnight on December 8th. Green and yellow values denote no change or slight losses in SWE, respectively.
ALT SWE by basin as of midnight on the night of December 8. SWE is well below normal in the central and southern Cascades and the Olympics.
ALT Decorative banner image for the Annual PNW WY Impacts Survey.
ALT Graph of statewide September average temperatures 1895-2025. There is a general warming trend over the time period of around 0.3ºF per decade and September 2025 was the warmest September on record by a decent margin. Source: NCEI https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series
ALT Map of September 2025 Temperature rankings by WA Climate Division. Record warm temperatures occurred across eastern Washington and Puget Sound. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping
ALT Photograph of pivot irrigation underway over a dry field with virga overhead. Virga is rainfall that evaporates before it reached the surface, leaving visible streaks or rain shafts in the air.
ALT Table of longest streaks below 1.00" on record.
ALT Scatter plot of September 2025 temperature and precipitation relative to all Septembers since 1979. Source: https://climatetoolbox.org/tool/historical-climate-scatter
ALT The September 23 U.S. Drought Monitor highlights Washington state, where Abnormal Dryness (D0) to Extreme Drought (D3) covers the entire state.
ALT The 12-month departure from normal precipitation for Washington state shows much of western Washington with precipitation deficits over 10 inches with some areas over 20 inches since October 1, 2024.
ALT 24 hour rainfall totals from Saturday evening through Sunday evening. 0.75 inches to 1.25 inches in the North and Central Cascades as well as the coast. Up to a half inch in the lowlands.
ALT Climate Prediction Center October-December Temperature and Precipitation Outlook. Precipitation is most likely to be above normal for this period. Temperatures have equal chances of being below, above, or near-normal.
ALT June-August 2025 precipitation and temperature percentile maps for Washington State, created using ClimateToolbox.org. Darkest brown and red shadings reflect record dry and warm conditions over this period, respectively.