Alert archive / Washington / River Flood Warnings in 2017

River Flood Warning 17, NWS Seattle, WA

March 15, 2017King County, Washington

NWS Seattle, WA issued this river flood warning at Mar 15, 2017, 11:27 AM PDT for King County, Washington. It took effect at Mar 15, 2017, 7:13 PM PDT. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Mar 15, 2017, 11:27 AM PDT (18:27 UTC)
In effect from: Mar 15, 2017, 7:13 PM PDT
Expired: Mar 16, 2017, 1:55 PM PDT
In force: 19 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County King County, WA

The radar

The Seattle radar (KATX), 92 km from the middle of the area, began a volume at 18:30 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 Snoqualmie River near Carnation (CRNW1).

Action stage: 50.7 ft
Minor stage: 54 ft
Moderate stage: 56 ft
Major stage: 58 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12149000, 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 Mar 15, 9:30 AM PDT, 1 hour 57 minutes earlier.

Area forecast discussion, Mar 15, 9:30 AM PDT, 1 hour 57 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
Mar 15, 5:43 AM PDT	River Flood Warning	SEW	Lewis	34 hr
Mar 15, 9:04 AM PDT	Gale Warning	SEW		20 hr
Mar 15, 9:04 AM PDT	Small Craft Advisory	SEW		54 hr
Mar 15, 11:45 AM PDT	Flood Watch	SEW	Mason	64 hr

Nearby

River Flood Warnings in Washington, 2017 Every river flood warning in 2017

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.