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Home Return to list Winter Storm Warning 0010 Issued by the Seattle Forecast Office
Action: New Issued At: 2025-12-18 15:52:23 638 WWUS46 KSEW 182151 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 151 PM PST Thu Dec 18 2025 WAZ301>304-190715- /O.NEW.KSEW.WS.W.0010.251219T1200Z-251221T0000Z/ /O.EXT.KSEW.WW.Y.0024.000000T0000Z-251219T0300Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Stevens Pass, Mount Rainier, SR18 at Tiger Mountain Summit, Mount Baker, White Pass, Crystal Mountain, Paradise, Greenwater, Longmire, Ashford, and Snoqualmie Pass 151 PM PST Thu Dec 18 2025 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 7 PM PST THIS EVENING... ...WINTER STORM WARNING IN EFFECT FROM 4 AM FRIDAY TO 4 PM PST SATURDAY... * WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to 3 inches, with a brief period of freezing rain possible. Winds gusting as high as 45 mph. For the Winter Storm Warning, heavy snow expected. Total snow accumulations between 1 to 2 feet at Snoqualmie and Stevens, with locations like Paradise and Mount Baker receiving closer to 2 to 3 feet of snow. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...For the Winter Weather Advisory, until 7 PM PST this evening. For the Winter Storm Warning, from 4 AM Friday to 4 PM PST Saturday. * IMPACTS...Travel could be very difficult. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels will increase later this evening to around 6000 feet, which could bring a brief period of freezing rain. Confidence is low for freezing rain, but the potential exists for light accumulations. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. Slow down and use caution while traveling. Prepare for possible power outages. && $$ 28 Action: Continued Issued At: 2025-12-18 20:39:01 332 WWUS46 KSEW 190238 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 638 PM PST Thu Dec 18 2025 WAZ301>304-191300- /O.EXP.KSEW.WW.Y.0024.000000T0000Z-251219T0300Z/ /O.CON.KSEW.WS.W.0010.251219T1200Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Mount Baker, White Pass, Ashford, Greenwater, Paradise, Longmire, SR18 at Tiger Mountain Summit, Snoqualmie Pass, Crystal Mountain, Stevens Pass, and Mount Rainier 638 PM PST Thu Dec 18 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM FRIDAY TO 4 PM PST SATURDAY... ...WINTER WEATHER ADVISORY WILL EXPIRE AT 7 PM PST THIS EVENING... * WHAT...Heavy snow expected. Total snow accumulations between 1 to 2 feet at Snoqualmie and Stevens, with locations like Paradise and Mount Baker receiving closer to 2 to 3 feet of snow. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...From 4 AM Friday to 4 PM PST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Thursday evening and Friday morning commutes. * ADDITIONAL DETAILS...Snow levels will lower and return to below pass level late tonight, becoming as low as 1000 to 1500 ft by early Friday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ 62 Action: Continued Issued At: 2025-12-19 06:45:39 908 WWUS46 KSEW 191245 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 445 AM PST Fri Dec 19 2025 WAZ301>304-192045- /O.CON.KSEW.WS.W.0010.000000T0000Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including SR18 at Tiger Mountain Summit, Crystal Mountain, Snoqualmie Pass, Ashford, White Pass, Greenwater, Stevens Pass, Mount Rainier, Mount Baker, Longmire, and Paradise 445 AM PST Fri Dec 19 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations between 1 to 2 feet at Snoqualmie and Stevens, with locations like Paradise and Mount Baker receiving closer to 2 to 3 feet of snow. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Travel could be very difficult. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels will continue to lower between 1000 to 1500 ft this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ Action: Continued Issued At: 2025-12-19 14:24:53 774 WWUS46 KSEW 192024 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 1224 PM PST Fri Dec 19 2025 WAZ301>304-200430- /O.CON.KSEW.WS.W.0010.000000T0000Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Longmire, Paradise, Crystal Mountain, Greenwater, Stevens Pass, Mount Rainier, White Pass, SR18 at Tiger Mountain Summit, Mount Baker, Snoqualmie Pass, and Ashford 1224 PM PST Fri Dec 19 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations between 1 to 2 feet at Snoqualmie and Stevens, with locations like Paradise and Mount Baker receiving closer to 2 to 3 feet of snow. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Travel could be very difficult. Hazardous conditions could impact commuters. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ 41 Action: Continued Issued At: 2025-12-19 21:38:34 018 WWUS46 KSEW 200338 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 738 PM PST Fri Dec 19 2025 WAZ301>304-201300- /O.CON.KSEW.WS.W.0010.000000T0000Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Snoqualmie Pass, SR18 at Tiger Mountain Summit, Stevens Pass, Ashford, White Pass, Mount Baker, Crystal Mountain, Longmire, Greenwater, Mount Rainier, and Paradise 738 PM PST Fri Dec 19 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations between 1 to 2 feet at Snoqualmie and Stevens, with locations like Paradise and Mount Baker receiving closer to 2 to 3 feet of snow. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Travel could be very difficult. Hazardous conditions could impact commuters. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ 62 Action: Continued Issued At: 2025-12-20 06:46:39 641 WWUS46 KSEW 201246 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 446 AM PST Sat Dec 20 2025 WAZ301>304-202100- /O.CON.KSEW.WS.W.0010.000000T0000Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Mount Rainier, Mount Baker, Longmire, Stevens Pass, Snoqualmie Pass, Greenwater, White Pass, Ashford, Paradise, Crystal Mountain, and SR18 at Tiger Mountain Summit 446 AM PST Sat Dec 20 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * WHAT...Heavy snow expected. Additional snow accumulations of up to 1 foot expected at Snoqualmie and Stevens. Additional snow amounts between 1 to 2 feet expected for locations like Paradise and Mount Baker. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ Action: Continued Issued At: 2025-12-20 14:54:24 396 WWUS46 KSEW 202053 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 1253 PM PST Sat Dec 20 2025 WAZ301>304-210000- /O.CON.KSEW.WS.W.0010.000000T0000Z-251221T0000Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Stevens Pass, Longmire, Crystal Mountain, Greenwater, Mount Rainier, Mount Baker, Paradise, Ashford, White Pass, Snoqualmie Pass, and SR18 at Tiger Mountain Summit 1253 PM PST Sat Dec 20 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * WHAT...Heavy snow expected. Additional snow accumulations of up to 1 foot expected at Snoqualmie and Stevens. Additional snow amounts between 1 to 2 feet expected for locations like Paradise and Mount Baker. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ 41 Action: Time Extended Issued At: 2025-12-20 17:16:27 378 WWUS46 KSEW 202316 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 316 PM PST Sat Dec 20 2025 WAZ301>304-210730- /O.EXT.KSEW.WS.W.0010.000000T0000Z-251221T0800Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Stevens Pass, Longmire, Crystal Mountain, Greenwater, Mount Rainier, Mount Baker, Paradise, Ashford, White Pass, Snoqualmie Pass, and SR18 at Tiger Mountain Summit 316 PM PST Sat Dec 20 2025 ...WINTER STORM WARNING NOW IN EFFECT UNTIL MIDNIGHT PST TONIGHT... * WHAT...Heavy snow. Additional snow accumulations up to 8 to 12 inches. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until midnight PST tonight. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages. && $$ 41 Action: Expired Issued At: 2025-12-21 01:38:41 313 WWUS46 KSEW 210738 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 1138 PM PST Sat Dec 20 2025 WAZ301>304-210845- /O.EXP.KSEW.WS.W.0010.000000T0000Z-251221T0800Z/ Cascades of Whatcom and Skagit Counties-Cascades of Snohomish and Northern King Counties-Cascades of Southern King County-Cascades of Pierce and Lewis Counties- Including Crystal Mountain, Greenwater, Mount Baker, Snoqualmie Pass, Mount Rainier, Longmire, Paradise, SR18 at Tiger Mountain Summit, Ashford, White Pass, and Stevens Pass 1138 PM PST Sat Dec 20 2025 ...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT PST TONIGHT... Snow has largely tapered across the Central Cascades. 2-4 inches will still remain possible for higher elevations of the North Cascades, but expect precipitation to gradually lull for a few hours overnight. $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||