Alert archive / Washington / River Flood Warnings in 2015

River Flood Warning 124, NWS Seattle, WA

December 9, 2015King County, Washington

NWS Seattle, WA issued this river flood warning at Dec 9, 2015, 4:31 AM PST for King County, Washington. It took effect at Dec 9, 2015, 11:40 AM PST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2015, 4:31 AM PST (12:31 UTC)
In effect from: Dec 9, 2015, 11:40 AM PST
Expired: Dec 10, 2015, 6:07 PM PST
In force: 30 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 12:34 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 Cedar River (WA) at Renton (RNTW1).

Action stage: 10.4 ft
Minor stage: 13 ft
Moderate stage: 14.5 ft
Major stage: 16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12119000, 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 9, 4:07 AM PST, 24 minutes earlier.

Area forecast discussion, Dec 9, 4:07 AM PST, 24 minutes before

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In the hours before

Local storm report, Dec 8, 11:37 PM PST, 4 hours 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1137 PM PST TUE DEC 08 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1137 PM     HEAVY RAIN       1 ENE ABERDEEN          46.98N 123.83W
12/08/2015  M2.94 INCH       GRAYS HARBOR       WA   TRAINED SPOTTER

            24 HOUR TOTAL

&&

Local storm report, Dec 9, 1:32 AM PST, 2 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
132 AM PST WED DEC 09 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0131 AM     HEAVY RAIN       NE NAPAVINE             46.58N 122.90W
12/09/2015  M2.00 INCH       LEWIS              WA   TRAINED SPOTTER

            2.00 INCHES IN 24 HOURS ENDING 130 AM PST.

&&

ALBRECHT

Special weather statement, Dec 9, 2:52 AM PST, 1 hour 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
252 AM PST WED DEC 9 2015

WAZ503-504-506-507-509-511>517-555-556-558-559-567>569-100230-
WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-WESTERN SKAGIT COUNTY-
EVERETT AND VICINITY-TACOMA AREA-HOOD CANAL AREA-
LOWER CHEHALIS VALLEY AREA-OLYMPICS-EASTERN STRAIT OF JUAN DE FUCA-
WESTERN STRAIT OF JUAN DE FUCA-NORTH COAST-CENTRAL COAST-
EAST PUGET SOUND LOWLANDS-BELLEVUE AND VICINITY-SEATTLE AND VICINITY-
BREMERTON AND VICINITY-CASCADES OF WHATCOM AND SKAGIT COUNTIES-
CASCADES OF SNOHOMISH AND KING COUNTIES-
CASCADES OF PIERCE AND LEWIS COUNTIES-
252 AM PST WED DEC 9 2015

...HEAVY RAINFALL THAT HAS OCCURRED OVER THE PAST 4 DAYS WILL LEAD
TO AN INCREASED THREAT OF LANDSLIDES IN WESTERN WASHINGTON...

HEAVY RAINFALL THAT HAS OCCURRED OVER THE PAST 4 DAYS WILL LEAD
TO AN INCREASED THREAT OF LANDSLIDES IN WESTERN WASHINGTON.
RAINFALL AMOUNTS HAVE GENERALLY RANGED FROM 4 TO 10 INCHES ON THE
COAST AND 2 TO 7 INCHES IN THE INTERIOR LOWLANDS SINCE SATURDAY.
THIS HEAVY RAINFALL HAS INCREASED SOIL MOISTURE TO HIGH LEVELS
ACROSS WESTERN WASHINGTON. WHILE RAINFALL RATES WILL DECREASE AS
THE AIR MASS COOLS OVER THE NEXT SEVERAL DAYS...ADDITIONAL
RAINFALL ON TOP OF ALREADY SATURATED SOILS WILL PUT EXTRA PRESSURE
ON UNSTABLE SLOPES...LEADING TO AN INCREASED THREAT OF LANDSLIDES.

A FEW LANDSLIDES HAVE ALREADY BEEN REPORTED IN VARIOUS LOCATIONS
IN WESTERN WASHINGTON. A LANDSLIDE ON THE RAILROAD TRACKS IN
EDMONDS ON MONDAY FORCED THE CANCELLATION OF SOUNDER AND AMTRAK
SERVICE BETWEEN EVERETT AND SEATTLE. A MUDSLIDE WEST OF STEVENS
PASS REDUCED U.S. HIGHWAY 2 DOWN TO ONE LANE IN BOTH DIRECTIONS
TUESDAY AFTERNOON. THERE WAS ALSO A MUDSLIDE IN WOODINVILLE. MORE
LANDSLIDES ARE LIKELY.

FOR MORE INFORMATION ABOUT CURRENT CONDITIONS...VISIT
WWW.WEATHER.GOV/SEATTLE...SELECT HYDROLOGY...AND THEN SCROLL DOWN
FOR THE LINKS TO THE LANDSLIDE INFORMATION PAGES.

TO REPORT LANDSLIDES TO THE STATE FOR TABULATION...GO TO THE
WASHINGTON STATE LANDSLIDE RISK WEB PAGE AND THE LINK FOR
REPORTING.

ALBRECHT
WWW.WEATHER.GOV/SEATTLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 8, 5:40 PM PST	River Flood Warning	SEW	Grays Harbor	6 days
Dec 8, 8:56 PM PST	Gale Warning	SEW		54 hr
Dec 8, 10:58 PM PST	River Flood Warning	SEW	Skagit	54 hr
Dec 8, 10:58 PM PST	River Flood Warning	SEW	Pierce	26 hr
Dec 9, 2:51 AM PST	High Wind Watch	SEW		12 hr
Dec 9, 2:51 AM PST	Winter Weather Advisory	SEW		12 hr
Dec 9, 2:53 AM PST	Gale Watch	SEW		12 hr
Dec 9, 5:02 AM PST	River Flood Warning	SEW	King	18 hr
Dec 9, 5:07 AM PST	River Flood Warning	SEW	Pierce, Thurston	57 hr
Dec 9, 6:23 AM PST	River Flood Warning	SEW	Clallam	13 hr
Dec 9, 8:57 AM PST	River Flood Warning	SEW	Snohomish	17 hr
Dec 9, 2:06 PM PST	River Flood Warning	SEW	Lewis	31 hr
Dec 9, 2:20 PM PST	Coastal Flood Warning	SEW		38 hr
Dec 9, 2:20 PM PST	Coastal Flood Advisory	SEW	San Juan	28 hr
Dec 9, 2:34 PM PST	Wind Advisory	SEW	San Juan	28 hr
Dec 9, 2:40 PM PST	Gale Watch	SEW		7 hr
Dec 9, 2:40 PM PST	Small Craft Advisory	SEW		7 hr
Dec 9, 2:51 PM PST	Winter Weather Advisory	SEW		33 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.