Alert archive / Washington / Winter Storm Warnings in 2026

Winter Storm Warning 3, NWS Seattle, WA

March 11, 202610 counties in Washington

NWS Seattle, WA issued this winter storm warning at Mar 11, 2026, 2:23 AM PDT for 10 counties in Washington. It took effect at Mar 12, 2026, 5:00 AM PDT. It was in force for 54 hr. 60 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Mar 11, 2026, 2:23 AM PDT (09:23 UTC)
In effect from: Mar 12, 2026, 5:00 AM PDT
Expired: Mar 14, 2026, 11:00 AM PDT
In force: 54 hr
Issued by: NWS Seattle, WA

Counties Clallam County, WA, Grays Harbor County, WA, Jefferson County, WA, King County, WA, Lewis County, WA, Mason County, WA, Pierce County, WA, Skagit County, WA, Snohomish County, WA, Whatcom County, WA

The radar

The Seattle radar (KATX), 58 km from the middle of the area, began a volume at 09:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Mar 13, 4:00 AM PDT	SNOW 10	Hurricane Ridge, WA	From NWAC observing station.
Mar 13, 5:29 AM PDT	SNOW 0	2 E Stimson Crossing, WA	Cocorahs station WA-SN-43 North Marysville 1.3 WNW.
Mar 13, 6:00 AM PDT	SNOW 0	4 N Capitol Hill, WA	Cocorahs station WA-KG-325 Seattle 4.4 NNE.
Mar 13, 6:00 AM PDT	SNOW 1.8	Newhalem, WA	CO-OP Observer station NWMW1 Newhalem.
Mar 13, 6:00 AM PDT	SNOW 2.5	2 Ene Federal Way, WA	Cocorahs station WA-KG-76 Lakeland North 0.5 ENE.
Mar 13, 6:00 AM PDT	SNOW 2.5	3 Ene Diablo, WA	CO-OP Observer station ROSW1 3.3 E Diablo.
Mar 13, 6:00 AM PDT	SNOW 7	Mount Baker, WA	From NWAC observation station.
Mar 13, 6:00 AM PDT	SNOW 23	Stevens Pass, WA	From NWAC station Stevens Pass Schmidt Haus.
Mar 13, 6:50 AM PDT	SNOW 0	4 N Seattle, WA	Cocorahs station WA-KG-239 Seattle 3.9 N.
Mar 13, 6:52 AM PDT	SNOW 1.3	Redmond, WA
Mar 13, 7:00 AM PDT	SNOW 0	1 Ne Artondale, WA	Cocorahs station WA-PR-54 Gig Harbor 1.6 W.
Mar 13, 7:00 AM PDT	SNOW 0	1 S Tacoma, WA	Cocorahs station WA-PR-102 Tacoma 0.8 S.
Mar 13, 7:00 AM PDT	SNOW 0	1 Wnw Bellingham, WA	Cocorahs station WA-WC-99 Bellingham 2.4 NW.
Mar 13, 7:00 AM PDT	SNOW 0	2 Sw Dupont, WA	Cocorahs station WA-PR-109 Dupont 1.7 SW.
Mar 13, 7:00 AM PDT	SNOW 0	2 W Snee Oosh, WA	Cocorahs station WA-SG-58 Anacortes 4.6 SSE.
Mar 13, 7:00 AM PDT	SNOW 0	3 Sse Bellingham, WA	Cocorahs station WA-WC-64 Bellingham 3.0 SSE.
Mar 13, 7:00 AM PDT	SNOW 0	3 Sse Sequim, WA	Cocorahs station WA-CM-73 Sequim 2.8 SSE.
Mar 13, 7:00 AM PDT	SNOW 0	4 E Blanchard, WA	Cocorahs station WA-SG-48 Burlington 8.1 N.
Mar 13, 7:00 AM PDT	SNOW 0	4 Ssw Sheridan Beach, WA	Cocorahs station WA-KG-299 Seattle 4.9 NNE.
Mar 13, 7:00 AM PDT	SNOW 0.2	2 Ne Marysville, WA	Cocorahs station WA-SN-115 Marysville 1.5 NE.
Mar 13, 7:00 AM PDT	SNOW 0.2	2 Se Martha Lake, WA	Cocorahs station WA-SN-12 Bothell 4.9 NNW.
Mar 13, 7:00 AM PDT	SNOW 0.2	Sudden Valley, WA	Cocorahs station WA-WC-73 Bellingham 5.4 ESE.
Mar 13, 7:00 AM PDT	SNOW 0.3	Concrete, WA	CO-OP Observer station CNCW1 Concrete.
Mar 13, 7:00 AM PDT	SNOW 0.4	2 Ne Mill Creek, WA	Cocorahs station WA-SN-58 Mill Creek 1.8 NE.
Mar 13, 7:00 AM PDT	SNOW 0.5	1 Se Arlington, WA	Cocorahs station WA-SN-120 Arlington 1.2 SE.
Mar 13, 7:00 AM PDT	SNOW 0.5	1 Se Harbour Pointe, WA	Cocorahs station WA-SN-138 Lynnwood 3.3 N.
Mar 13, 7:00 AM PDT	SNOW 0.5	2 Ene Mill Creek, WA	Cocorahs station WA-SN-109 Everett 6.6 SSE.
Mar 13, 7:00 AM PDT	SNOW 0.8	1 Nw North Hill, WA	Cocorahs station WA-KG-318 Des Moines 2.3 NNW.
Mar 13, 7:00 AM PDT	SNOW 0.8	1 Wsw Brier, WA	Cocorahs station WA-SN-21 Brier 0.7 WSW.
Mar 13, 7:00 AM PDT	SNOW 0.8	4 Wnw Hoodsport, WA	Cocorahs station WA-MS-28 Hoodsport 3.7 WNW.
Mar 13, 7:00 AM PDT	SNOW 0.8	Sammamish, WA
Mar 13, 7:00 AM PDT	SNOW 1	1 S Sahalee, WA	Cocorahs station WA-KG-322 1 SSW Sahalee.
Mar 13, 7:00 AM PDT	SNOW 1.3	1 W Federal Way, WA	Cocorahs station WA-KG-237 Federal Way 0.9 W.
Mar 13, 7:00 AM PDT	SNOW 1.3	2 Se Monroe, WA	Cocorahs station WA-SN-108 Monroe 2.4 SE.
Mar 13, 7:00 AM PDT	SNOW 2.1	Glacier, WA	Cocorahs station WA-WC-70 Glacier 0.1 SW.
Mar 13, 7:00 AM PDT	SNOW 5.5	5 Ene Cedar Falls, WA	Cocorahs station WA-KG-143 North Bend 5.4 ESE.
Mar 13, 7:04 AM PDT	SNOW 1	4 Wnw Hoodsport, WA
Mar 13, 7:15 AM PDT	SNOW 3	1 Sse Woodinville, WA	Cocorahs station WA-KG-61 Redmond 3.7 N.
Mar 13, 7:30 AM PDT	SNOW 0	4 N Seattle, WA	Cocorahs station WA-KG-199 Seattle 4.5 N.
Mar 13, 7:33 AM PDT	SNOW 0	7 Ese Lake Stevens, WA	Cocorahs station WA-SN-143 Snohomish 8.8 ENE.
Mar 13, 7:34 AM PDT	SNOW 0.2	8 Ene Shelton, WA	Cocorahs station WA-MS-30 Shelton 8.3 ENE.
Mar 13, 7:40 AM PDT	SNOW 1	2 Ene Burlington, WA	Amateur Radio Report.
Mar 13, 7:45 AM PDT	SNOW 0	2 N Maple Falls, WA	Cocorahs station WA-WC-96 Maple Falls 1.8 NNE.
Mar 13, 7:45 AM PDT	SNOW 1	2 Sse University Place, WA	Cocorahs station WA-PR-98 Lakewood 2.4 N.
Mar 13, 7:48 AM PDT	SNOW 1	3 Ssw Everett, WA
Mar 13, 7:50 AM PDT	SNOW 0	1 Sw Kirkland, WA	Puget Sound Boaters Net (HAM).
Mar 13, 7:50 AM PDT	SNOW 0.5	1 S Everett, WA	Cocorahs station WA-SN-20 Everett 1.0 S.
Mar 13, 7:50 AM PDT	SNOW 1	Everett, WA	NW Regional International Net (HAM).
Mar 13, 7:51 AM PDT	SNOW 1.5	1 Nnw Martha Lake, WA
Mar 13, 7:53 AM PDT	SNOW 1.5	3 Se Sheridan Beach, WA	Puget Sound Boaters Net (HAM).
Mar 13, 7:55 AM PDT	SNOW 1	1 Sse Lake Serene-North, WA	Puget Sound Boaters Net (HAM).
Mar 13, 7:57 AM PDT	SNOW 0.3	1 Ene Yarrow Point, WA	Puget Sound Boaters Net (HAM).
Mar 13, 7:58 AM PDT	SNOW 1.3	Sammamish, WA
Mar 13, 7:59 AM PDT	SNOW 0.5	Shoreline, WA
Mar 13, 8:00 AM PDT	SNOW 0.4	6 Nw Maple Falls, WA	Cocorahs station WA-WC-81 Sumas 3.6 ESE.
Mar 13, 8:00 AM PDT	SNOW 0.5	2 W Mercer Island, WA	Cocorahs station WA-KG-333 Seattle 5.4 SE.
Mar 13, 8:00 AM PDT	SNOW 0.6	4 S Shoreline, WA	Cocorahs station WA-KG-192 Seattle 5.6 N.
Mar 13, 8:00 AM PDT	SNOW 0.8	3 Nw Hunts Point, WA	Cocorahs station WA-KG-238 Seattle 5.0 NE.
Mar 13, 8:00 AM PDT	SNOW 1	10 Sw Vaughn, WA	Cocorahs station WA-MS-32 Lakebay 5.7 WNW.
Mar 13, 8:00 AM PDT	SNOW 1	1 Ssw Concrete, WA	Cocorahs station WA-SG-53 Concrete 1.4 SSW.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Quillayute State, WA (KUIL), launched 00:00Z, 9.4 hours before the alert went out and 143 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 452 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Seattle, WA wrote its last area forecast discussion before this winter storm warning went out at Mar 10, 8:05 PM PDT, 6 hours 18 minutes earlier.

Area forecast discussion, Mar 10, 8:05 PM PDT, 6 hours 18 minutes before

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The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

Issued	Product	Office	Lasted
Mar 11, 2:13 AM PDT	Small Craft Advisory	SEW	43 hr
Mar 11, 8:08 AM PDT	Storm Warning	SEW	18 hr
Mar 11, 12:26 PM PDT	Small Craft Advisory	SEW	29 hr

Nearby

Winter Storm Warnings in Washington, 2026 Every winter storm warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.