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East Slopes of the Central Cascades of Washington
East Slopes of the Southern Cascades of Washington
San Juan County
Western Whatcom County
Northern Cascade Foothills
Central Cascade Foothills
Northwest Interior
Everett and Vicinity
Seattle Metropolitan Area
Tacoma Area
Admiralty Inlet Area
Hood Canal, Kitsap Peninsula
Southwest Interior
Olympics
Eastern Strait of Juan de Fuca
Western Strait of Juan de Fuca
North Coast
Central Coast
West Slopes Northern Cascades and Passes
West Slopes Central Cascades and Passes
South Washington Cascades
Willapa Hills
South Washington Coast
Lower Columbia and I-5 Corridor in Cowlitz County
Western Columbia River Gorge
East Columbia River Gorge
Kittitas Valley
Yakima Valley
Lower Columbia Basin
Foothills of the Blue Mountains
Northwest Blue Mountains
Northeast Blue Mountains
Lower Garfield and Asotin Counties
Washington Palouse
Moses Lake Area
Upper Columbia Basin
Spokane Area
Northeast Mountains
Okanogan Highlands
Greater Vancouver Area
South Washington Cascade Foothills
Wenatchee Area
East Slopes Northern Cascades
Okanogan Valley
Waterville Plateau
East Slopes of the Central Cascades of Washington East Slopes of the Southern Cascades of Washington San Juan County Western Whatcom County Northern Cascade Foothills Central Cascade Foothills Northwest Interior Everett and Vicinity Seattle Metropolitan Area Tacoma Area Admiralty Inlet Area Hood Canal, Kitsap Peninsula Southwest Interior Olympics Eastern Strait of Juan de Fuca Western Strait of Juan de Fuca North Coast Central Coast West Slopes Northern Cascades and Passes West Slopes Central Cascades and Passes South Washington Cascades Willapa Hills South Washington Coast Lower Columbia and I-5 Corridor in Cowlitz County Western Columbia River Gorge East Columbia River Gorge Kittitas Valley Yakima Valley Lower Columbia Basin Foothills of the Blue Mountains Northwest Blue Mountains Northeast Blue Mountains Lower Garfield and Asotin Counties Washington Palouse Moses Lake Area Upper Columbia Basin Spokane Area Northeast Mountains Okanogan Highlands Greater Vancouver Area South Washington Cascade Foothills Wenatchee Area East Slopes Northern Cascades Okanogan Valley Waterville Plateau

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National Weather Service Warning - Flood Warning for Snohomish County

Issued: 12:45 PM Apr 17  Will Expire: 4:45 PM Apr 24


BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SEATTLE WA
1245 PM PDT THU APR 17 2014

FLOOD BULLETIN NO. 31


/O.EXT.KSEW.FA.W.0003.000000T0000Z-140424T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SNOHOMISH-
1245 PM PDT THU APR 17 2014

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS EXTENDED THE

* FLOOD WARNING FOR THE NORTH FORK STILLAGUAMISH RIVER EAST OF THE
STATE ROUTE 530 SLIDE IN NORTH CENTRAL SNOHOMISH COUNTY...

* UNTIL 445 PM PDT APRIL 24.

* FLOODING CONTINUES ON THE NORTH FORK OF THE STILLAGUAMISH RIVER
UPSTREAM OF THE SR 530 SLIDE DUE TO DEBRIS FROM THE STATE ROUTE
530 SLIDE PARTIALLY BLOCKING THE RIVER AND THE RESULTING POOLING
OF WATER BEHIND THE DEBRIS DAM. WE WILL BE UPDATING THE FLOOD
WARNING ON A DAY TO DAY BASIS.

* THE OSO AREA HAS RECEIVED 1.84 INCHES OF RAIN IN THE LAST 24
HOURS. THE RAINFALL FORECAST IS FOR ANOTHER 1.0 INCHES OF RAIN IN
THE OSO AREA AND UP TO 1.5 INCHES IN THE MOUNTAINS THROUGH FRIDAY
MORNING. THE RIVER WILL CONTINUE RISING TODAY...CRESTING TONIGHT
BEFORE MIDNIGHT WITH THE LARGEST FLOWS SINCE THE SLIDE OCCURRED.
THE PEAK FLOW FORECAST FOR THE NORTH FORK RIVER NEAR ARLINGTON
GAGE IS NEAR 9.3 FT. OR 13000 CFS AND NEAR 7900 CFS FOR THE
NORTH FORK STILLAGUAMISH RIVER AT OSO.

* AT 1200 PM PDT...THE POOL ELEVATION WAS 285.8 FT.

* THE POOL ELEVATION IS FORECAST TO RISE TO 287.7 FT. BY THURSDAY
NIGHT BEFORE MIDNIGHT. THE POOL ELEVATION WILL START DROPPING
SIGNIFICANTLY FRIDAY. THERE IS A GREAT AMOUNT OF UNCERTAINTY IN
THE FORECAST POOL ELEVATION CREST DUE IN PART TO LIMITED KNOWLEDGE
OF HOW MUCH WATER THE NEW STREAM CHANNEL THROUGH THE SLIDE DEBRIS
WILL BE ABLE TO CONVEY.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WARNING MEANS FLOODING IS OCCURRING OR IMMINENT. MOST FLOOD
RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER
COVERED BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A
FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER
MOVE UP TO HIGHER GROUND.

&&

LAT...LON 4825 12181 4829 12185 4829 12177 4829 12166
4824 12165 4826 12174

$$

BOWER

WWW.WEATHER.GOV/SEATTLE