Alert archive / Washington / River Flood Warnings in 2023

River Flood Warning 32, NWS Seattle, WA

December 5, 2023Snohomish County, Washington

NWS Seattle, WA issued this river flood warning at Dec 5, 2023, 8:39 PM PST for Snohomish County, Washington. It took effect at Dec 5, 2023, 9:26 PM PST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Dec 5, 2023, 8:39 PM PST (04:39 UTC)
In effect from
Dec 5, 2023, 9:26 PM PST
Expired
Dec 6, 2023, 4:09 AM PST
In force
7 hr
Issued by
NWS Seattle, WA
Area
Storm-based polygon
Flood severity
Minor

County Snohomish County, WA

The radar

The Seattle radar (KATX), 60 km from the middle of the area, began a volume at 04:42 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 Pilchuck River near Snohomish (PILW1). The gauge peaked at 17.79 ft at Dec 5, 2023, 7:00 PM PST.

actionminormoderate152012/0612/07
Action stage
16 ft
Minor stage
18 ft
Moderate stage
20 ft
Major stage
22 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12155300, 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 5, 3:11 PM PST, 5 hours 28 minutes earlier.

Area forecast discussion, Dec 5, 3:11 PM PST, 5 hours 28 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 6, 1:31 AM PSTRiver Flood WarningSEWPierce12 hr
Dec 6, 3:06 AM PSTRiver Flood WarningSEWPierce13 hr
Dec 6, 8:24 AM PSTAreal Flood WarningSEWSnohomish12 hr

Nearby

River Flood Warnings in Washington, 2023Every river flood warning in 2023

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.