Alert archive / Washington / River Flood Warnings in 2018

River Flood Warning 84, NWS Seattle, WA

December 29, 2018Mason County, Washington

NWS Seattle, WA issued this river flood warning at Dec 29, 2018, 4:13 PM PST for Mason County, Washington. It took effect at Dec 29, 2018, 7:58 PM PST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Dec 29, 2018, 4:13 PM PST (00:13 UTC)
In effect from: Dec 29, 2018, 7:58 PM PST
Expired: Dec 30, 2018, 2:24 PM PST
In force: 18 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 00:16 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).

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 29, 2:37 PM PST, 1 hour 36 minutes earlier.

Area forecast discussion, Dec 29, 2:37 PM PST, 1 hour 36 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 29, 7:30 PM PST	Small Craft Advisory	SEW		19 hr
Dec 29, 10:52 PM PST	River Flood Warning	SEW	King	15 hr
Dec 30, 12:39 AM PST	Gale Warning	SEW		5 hr

Nearby

River Flood Warnings in Washington, 2018 Every river flood warning in 2018

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.