Alert archive / Washington / River Flood Warnings in 2020

River Flood Warning 23, NWS Seattle, WA

January 31, 2020King County, Washington

NWS Seattle, WA issued this river flood warning at Jan 31, 2020, 9:02 AM PST for King County, Washington. It took effect at Jan 31, 2020, 12:33 PM PST. It was in force for 46 hr.

The area

The counties it named.

The facts

Issued
Jan 31, 2020, 9:02 AM PST (17:02 UTC)
In effect from
Jan 31, 2020, 12:33 PM PST
Expired
Feb 2, 2020, 10:03 AM PST
In force
46 hr
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 17:00 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 Tolt River near Carnation (TOLW1).

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12148500, 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 Jan 31, 3:04 AM PST, 5 hours 58 minutes earlier.

Area forecast discussion, Jan 31, 3:04 AM PST, 5 hours 58 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jan 31, 2:08 AM PSTHigh Wind WarningSEWSan Juan25 hr
Jan 31, 2:08 AM PSTWind AdvisorySEWSan Juan32 hr
Jan 31, 2:42 AM PSTGale WarningSEW42 hr
Jan 31, 3:34 PM PSTRiver Flood WarningSEWSnohomish34 hr
Jan 31, 3:35 PM PSTRiver Flood WarningSEWKing38 hr
Jan 31, 3:35 PM PSTRiver Flood WarningSEWKing61 hr

Nearby

River Flood Warnings in Washington, 2020Every river flood warning in 2020

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.