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Widespread rainfall overnight and major coastal flooding require caution from Western Washingtonians during the end of this workweek, the National Weather Service warns.
Wednesday was the wettest day of the year so far in Seattle. Over 1.1 inches of rain was measured at the NWS field office.
High tides are expected Thursday afternoon and evening along the coast and interior, as another dramatic weather system makes its way through the area. Accompanying mountain snow and gusty winds are likely, according to NWS Seattle.
A slight chance of thunderstorms remains in the forecast on Thursday for all of Western Washington, bringing periods of heavy rainfall and high wind speeds. In the Seattle metro area, impacts will primarily include rain. Farther west, however, there's an increased chance of thunderstorms, coastal flooding and high surf.
For Puget Sound, water levels will be high but aren't expected to meet or exceed flood levels, according to NWS. Wind gusts between 25 and 30 mph are expected through Thursday in Seattle.
A winter storm warning is in place until Friday morning for the Cascades of Skagit and Whatcom counties. Between 8 and 12 inches of snow is possible along Highway 20, the weather service estimates. Heavy rain in the Olympics will likely cause sharp rises on the Skokomish River in Mason County with minor flooding possible on Thursday.
Overnight Wednesday into Thursday morning, the Seattle Department of Transportation reported standing water on several city roads. About 12 inches of fast-moving standing water can carry away a small car, and 6 inches can knock over an adult. When in doubt: Turn around, don't drown.
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There isn't expected to be a break in the action until Saturday, when Western Washington may get a temporary reprieve from the rain.
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