River Flood Warning 33, NWS Seattle, WA

Issued

Dec 8, 2025, 8:10 PM PST (04:10 UTC)

In effect from

Dec 8, 2025, 8:52 PM PST

Expired

Dec 12, 2025, 12:12 AM PST

In force

3 days

Issued by

NWS Seattle, WA

Area

Storm-based polygon

Flood severity

Moderate

County Snohomish County, WA

The Seattle radar (KATX), 60 km from the middle of the area, began a volume at 04:11 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.

Written for the forecast point Stillaguamish River at Arlington (ARLW1).

Action stage

12.5 ft

Minor stage

14 ft

Moderate stage

17.5 ft

Major stage

19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12167400, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

NWS Seattle, WA wrote its last area forecast discussion before this river flood warning went out at Dec 8, 3:13 PM PST, 4 hours 57 minutes earlier.

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

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.