Avalanche Warning

WAZ519-019-ORZ011-250100-

 ...AVALANCHE WARNING FOR THE WEST SLOPES OF THE WASHINGTON CASCADES
MT RAINIER SOUTH AND THE MT HOOD AREA WEDNESDAY NIGHT AND THURSDAY
MORNING...

FURTHER HEAVY SNOW AND THEN POTENTIAL RAIN SHOULD BE SEEN IN THE MT
RAINIER TO MT HOOD AREA WEDNESDAY NIGHT AND THURSDAY MORNING. THIS
IS VERY LIKELY TO CAUSE WET LOOSE...STORM SLAB AND WIND SLAB
AVALANCHE CONDITIONS IN THIS AREA. AN AVALANCHE WARNING IS ISSUED
FOR THE MT RAINIER TO MT HOOD AREA FOR WEDNESDAY NIGHT AND THURSDAY
MORNING. BACK COUNTRY TRAVEL IN AVALANCHE TERRAIN IS THIS AREA IS
NOT RECOMMENDED WEDNESDAY NIGHT AND THURSDAY MORNING.

SIGNIFICANT SNOW AND AVALANCHE CONDITIONS ARE ALSO EXPECTED IN OTHER
AREAS BUT THAT ARE SLIGHTLY LESS THAN WARNING CRITERIA. AVALANCHES
ARE ALSO LIKELY IN THESE OTHER AREAS AS WELL.

THIS STATEMENT WILL BE UPDATED AS WARRANTED. FOR HOURLY MOUNTAIN
WEATHER DATA AND COMPLETE FORECAST DETAILS PLEASE VISIT WWW.NWAC.US

BACKCOUNTRY TRAVELERS SHOULD BE AWARE THAT ELEVATION AND GEOGRAPHIC
DISTINCTIONS ARE APPROXIMATE AND THAT A TRANSITION ZONE BETWEEN
DANGERS EXISTS. THERE ARE ALSO AVALANCHE SAFE AREAS IN THE MOUNTAINS
DURING ALL LEVELS OF AVALANCHE DANGER.

&&

FERBER/NORTHWEST AVALANCHE CENTER


$$







































Flood Warning

FLOOD STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
343 PM PDT WED APR 23 2014

FLOOD BULLETIN NO. 37

WAC061-242345-
/O.CON.KSEW.FA.W.0003.000000T0000Z-140424T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SNOHOMISH-
343 PM PDT WED APR 23 2014

...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT THURSDAY FOR
NORTH CENTRAL SNOHOMISH COUNTY...

* 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.

* A WARM FRONT WILL SPREAD RAIN TO THE OSO AREA TONIGHT FOLLOWED BY
  SHOWERS ON THURSDAY AS A COLD FRONT PASSES THROUGH. UP TO 1 INCH
  OF RAIN MAY FALL OVER THIS PERIOD WHICH MAY RESULT IN 0.5 FOOT
  RISE ON THE NORTH FORK OF THE STILLAGUAMISH RIVER FROM NEAR
  ARLINGTON EASTWARD TO THE SLIDE.

* AT 330 PM PDT WEDNESDAY...THE NORTH FORK OF THE STILLAGUAMISH
  RIVER NEAR ARLINGTON WAS AT 4.61 FEET OR 2825 CFS. THE NORTH FORK
  OF THE STILLAGUAMISH NEAR OSO WAS AT 216.4 FEET...OR 1830 CFS.

* AT 315 PM PDT WEDNESDAY...THE ELEVATION OF THE SLIDE POOL TO THE
  EAST OF THE SR 530 LANDSLIDE WAS 282.33 FEET. THERE CONTINUES TO
  BE A GREAT AMOUNT OF UNCERTAINTY IN THE FORECAST POOL ELEVATION
  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

$$


WWW.WEATHER.GOV/SEATTLE