Alert archive / Washington / River Flood Warnings in 2015

River Flood Warning 132, NWS Seattle, WA

December 20, 2015Mason County, Washington

NWS Seattle, WA issued this river flood warning at Dec 20, 2015, 6:34 AM PST for Mason County, Washington. It took effect at Dec 20, 2015, 9:19 AM PST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 20, 2015, 6:34 AM PST (14:34 UTC)
In effect from: Dec 20, 2015, 9:19 AM PST
Expired: Dec 20, 2015, 9:00 PM PST
In force: 12 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County Mason County, WA

The radar

The Langley Hill radar (KLGX), 74 km from the middle of the area, began a volume at 14:35 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 Skokomish River near Potlatch (SRPW1). The gauge peaked at 16.36 ft at Dec 20, 2015, 9:00 AM PST.

Action stage: 15 ft
Minor stage: 16.5 ft
Moderate stage: 17.5 ft
Major stage: 18 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12061500, 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 20, 5:00 AM PST, 1 hour 34 minutes earlier.

Area forecast discussion, Dec 20, 5:00 AM PST, 1 hour 34 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
Dec 20, 2:54 AM PST	Gale Watch	SEW	12 hr
Dec 20, 10:29 AM PST	Coastal Flood Advisory	SEW	4 hr
Dec 20, 2:44 PM PST	Winter Storm Warning	SEW	37 hr
Dec 20, 2:44 PM PST	Winter Weather Advisory	SEW	37 hr
Dec 20, 2:46 PM PST	Gale Warning	SEW	31 hr

Nearby

River Flood Warnings in Washington, 2015 Every river flood warning in 2015

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.