Alert archive / Washington / River Flood Warnings in 2025

River Flood Warning 49, NWS Seattle, WA

December 9, 2025King County, Washington

NWS Seattle, WA issued this river flood warning at Dec 9, 2025, 11:35 PM PST for King County, Washington. It took effect at Dec 10, 2025, 9:24 AM PST. It was in force for 9 days.

The area

The counties it named.

The facts

Issued: Dec 9, 2025, 11:35 PM PST (07:35 UTC)
In effect from: Dec 10, 2025, 9:24 AM PST
Expired: Dec 19, 2025, 6:52 AM PST
In force: 9 days
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Major

County King County, WA

The radar

The Seattle radar (KATX), 92 km from the middle of the area, began a volume at 07:36 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.

The river

Written for the forecast point Cedar River (WA) near Landsburg (LNDW1). The gauge peaked at 10.07 ft at Dec 11, 2025, 12:00 PM PST.

Action stage: 3.5 ft
Minor stage: 5.7 ft
Moderate stage: 6.5 ft
Major stage: 7.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12117500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood 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 river flood warning went out at Dec 9, 1:33 AM PST, 22 hours 2 minutes earlier.

Area forecast discussion, Dec 9, 1:33 AM PST, 22 hours 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 9, 10:17 PM PST	River Flood Warning	SEW	Whatcom	45 hr
Dec 9, 10:23 PM PST	River Flood Warning	SEW	Whatcom	36 hr
Dec 9, 11:35 PM PST	River Flood Warning	SEW	Clallam	24 hr
Dec 10, 7:31 AM PST	River Flood Warning	SEW	Skagit	43 hr
Dec 10, 7:31 AM PST	River Flood Warning	SEW	Snohomish	35 hr
Dec 10, 7:48 AM PST	River Flood Warning	SEW	Clallam	22 hr
Dec 10, 8:10 AM PST	River Flood Warning	SEW	King	9 days
Dec 10, 9:42 AM PST	River Flood Warning	SEW	Whatcom	62 hr
Dec 10, 10:26 AM PST	Areal Flood Warning	SEW	Whatcom	55 hr
Dec 10, 12:10 PM PST	Areal Flood Warning	SEW	King, Snohomish	28 hr
Dec 10, 12:40 PM PST	Areal Flood Warning	SEW	King, Skagit, Snohomish, Whatcom	43 hr

Nearby

River Flood Warnings in Washington, 2025 Every river flood warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.