Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

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Last Map Update: Sat, Apr 18, 2026 at 2:52:38 am PDT

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

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Frost Advisory

Frost Conditions

Frost Advisories are in effect tonight (4/17) into Saturday morning (4/18) across the Upper Hood River Valley & Southern Willamette Valley. Temperatures as low as 34-36 degrees will result in frost formation. Sensitive outdoor plants should be brought indoors or covered up if possible.