FLASH FLOOD WATCH FOR A PORTION OF WESTERN WASHINGTON... INCLUDING THE FOLLOWING COUNTY...SNOHOMISH (Deadly mudslide dam has blocked N. fork of Stilla

[Emily]

<blockquote class="twitter-tweet" lang="en"><p><a href="https://twitter.com/GenerationJP2">@GenerationJP2</a> there are reports of people walking in what is now a dry river bed "downstream" from the slide. This is VERY dangerous.</p>— Snohomish Sheriff (@SnoCoSheriff) <a href="https://twitter.com/SnoCoSheriff/statuses/447513249366306816">March 22, 2014</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

http://www.atmos.washington.edu/data/warning_report.WWA.html

WGUS66 KSEW 222316
FFASEW

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE SEATTLE WA
416 PM PDT SAT MAR 22 2014

WAC061-231130-
/O.NEW.KSEW.FF.A.0001.140322T2316Z-140324T0000Z/
/00000.0.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SNOHOMISH-
416 PM PDT SAT MAR 22 2014

...FLASH FLOOD WATCH IN EFFECT THROUGH SUNDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A

* FLASH FLOOD WATCH FOR A PORTION OF WESTERN WASHINGTON... INCLUDING THE FOLLOWING COUNTY...SNOHOMISH.

* THROUGH SUNDAY AFTERNOON

* A LANDSLIDE BLOCKED THE NORTH FORK OF THE STILLAGUAMISH RIVER NEAR OSO. WHEN AND IF THE LANDSLIDE-INDUCED BLOCKAGE RELEASES... FLASH FLOODING DOWNSTREAM TO ARLINGTON IS POSSIBLE.

* ROADS...SOME HOUSES...AND MANY FIELDS COULD FLOOD IF A FLASH FLOOD OCCURS. ESCAPE MAY BE DIFFICULT FROM RAPIDLY RISING WATERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS CONDITIONS ARE FAVORABLE FOR FLASH FLOODING BUT FLOODING IS NOT IMMINENT OR OCCURRING. MONITOR THE WEATHER AND BE READY TO ACT QUICKLY IF FLOODING IS OBSERVED OR A WARNING IS ISSUED. DO NOT GO NEAR THE NORTH FORK OF THE STILLAGUAMISH RIVER.

&&

$$





WGUS46 KSEW 222118
FLWSEW
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SEATTLE WA
218 PM PDT SAT MAR 22 2014

...THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A FLOOD WARNING FOR THE FOLLOWING RIVERS IN WASHINGTON...

NORTH FORK STILLAGUAMISH RIVER NEAR ARLINGTON AFFECTING SNOHOMISH COUNTY.

FLOOD BULLETIN NO. 1

A LANDSLIDE HAS BLOCKED THE NORTH FORK OF THE STILLAGUAMISH RIVER NEAR OSO. UPSTREAM OF THE LANDSLIDE...THE RIVER WILL LIKELY FLOOD LOW-LYING AREAS INCLUDING ROADS AND POSSIBLY SOME HOMES. WHEN AND IF THE LANDSLIDE-INDUCED BLOCKAGE RELEASES...SOME FLOODING DOWNSTREAM TO ARLINGTON IS POSSIBLE. A RIVER GAGE IMMEDIATELY DOWNSTREAM OF THE LANDSLIDE SHOWED THE RIVER LEVEL DROP FROM 3.1 FEET TO 0.9 FEET IN THE HOUR AFTER THE LANDSLIDE OCCURRED...ACTING AS CONFIRMATION THAT THE LANDSLIDE HAS BLOCKED THE RIVER FOR NOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE CARS...VANS...OR TRUCKS THROUGH FLOODED AREAS...THIS IS THE CAUSE OF MOST FLOOD RELATED DEATHS IN WASHINGTON. BE ALERT FOR RAPID CHANGES AND MONITOR DEVELOPMENTS BY LISTENING TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA.

&&

WAC061-230618- /O.NEW.KSEW.FL.W.0031.140322T2130Z-140323T2130Z/ /ARGW1.U.OT.000000T0000Z.000000T0000Z.000000T0000Z.OO/ 218 PM PDT SAT MAR 22 2014

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A

* FLOOD WARNING FOR THE NORTH FORK STILLAGUAMISH RIVER NEAR ARLINGTON * UNTIL SUNDAY AFTERNOON. * AT 1:15 PM SATURDAY THE STAGE WAS 4.3 FEET. * FLOOD STAGE IS 13.0 FEET. * FORECAST...THE NORTH FORK OF THE STILLAGUAMISH MAY FLOOD AS A RESULT OF AN UPSTREAM LANDSLIDE. AT THIS TIME...DETAILS ARE UNKNOWN...BUT THE LANDSLIDE HAS BLOCKED THE RIVER NEAR OSO.

&&

LAT...LON 4822 12164 4822 12191 4816 12211 4824 12214 4833 12193 4833 12164

$$

 

[Emily]

Re: FLASH FLOOD WATCH FOR A PORTION OF WESTERN WASHINGTON... INCLUDING THE FOLLOWING COUNTY...SNOHOMISH (Deadly mudslide dam has blocked N. fork of Stillaguamish river)

http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=sew&wwa=flood%20warning

FLOOD WARNING
NATIONAL WEATHER SERVICE SEATTLE WA
522 PM PDT THU MAR 27 2014

FLOOD BULLETIN NO.12

WAC061-310100-
/O.EXT.KSEW.FA.W.0002.000000T0000Z-140331T0100Z/
/00000.0.UU.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SNOHOMISH-
522 PM PDT THU MAR 27 2014

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS EXTENDED THE

* FLOOD WARNING FOR THE NORTH FORK OF THE STILLAGUAMISH RIVER EAST
OF THE LANDSLIDE NEAR OSO IN NORTH CENTRAL SNOHOMISH COUNTY...

* UNTIL 600 PM PDT SUNDAY.

* FLOODING CONTINUES FOR THE NORTH FORK OF THE STILLAGUAMISH RIVER
EAST OF OSO DUE TO THE LANDSLIDE MARCH 22 THAT BLOCKED THE RIVER...
RESULTING IN POOLING OF WATER BEHIND THE LANDSLIDE DEBRIS. WHILE THE
RIVER IS FLOWING THROUGH THE BLOCKAGE IN A NEW CHANNEL NOW...
FLOODING OF HOMES AND ROADS UPSTREAM OF THE SLIDE...INCLUDING
SR530...WILL CONTINUE UNTIL THE NEW RIVER CHANNEL IS DEEP AND WIDE
ENOUGH TO DRAIN THE LAKE FORMED BEHIND THE BLOCKAGE.

* A STORM BRINGING 0.5 TO 2.0 INCHES OF RAIN TO THE AREA BEGINNING
FRIDAY AND LASTING INTO SATURDAY WILL RAISE STREAMFLOWS SOMEWHAT IN
THE NORTH FORK STILLAGUAMISH RIVER. THE DOWNSTREAM GAGE NEAR
ARLINGTON IS EXPECTED TO RISE FROM 4.4 FT TO 5.8 FT MIDDAY SATURDAY.

* FORECAST...STREAM FLOW IS MOVING NICELY THROUGH THE NEW RIVER
CHANNEL AND THIS IS EXPECTED TO CONTINUE. THE INCREASE IN STREAMFLOW
COMING DOWN THE RIVER FRIDAY INTO SATURDAY IS IS NOT EXPECTED TO
HAVE MUCH AFFECT ON THE LEVEL OF THE POOL UPSTREAM OF THE LANDSLIDE
- LESS THAN A FOOT RISE IF AT ALL. THE FLOOD WARNING WILL CONTINUE
UNTIL THERE IS CONFIRMATION THAT THE FLOODING UPSTREAM OF THE
BLOCKAGE HAS ENDED. WE WILL BE UPDATING THE FLOOD WARNING ON A DAY
TO DAY BASIS.

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 4829 12201 4829 12168 4820 12173 4824 12201

$$

BOWER

WWW.WEATHER.GOV/SEATTLE