onsdag, 09 november 2011 22:10

Historisk stormvejr rammer Alaska

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Et lavtryk med rekordlavt centertryk (943 hPa) dannedes i Beringshavet og systemets vindfelt ramte onsdag morgen, lokal tid.

Meteorologer kalder samstemmende stormen for en af de værste nogensinde der har ramt området.

 

Der blev talt med store bogstaver :

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FAIRBANKS AK
108 PM AKST TUE NOV 8 2011

...ALASKA WEST COAST TO BE HIT BY ONE OF THE MOST SEVERE BERING SEA STORMS ON RECORD...

A POWERFUL AND EXTREMELY DANGEROUS STORM OF NEAR RECORD OR 
RECORD MAGNITUDE IS BEARING DOWN ON THE WEST COAST OF ALASKA. 
AT 9 AM THIS MORNING THE STORM CENTER WAS LOCATED ABOUT 600 
MILES SOUTHWEST OF ST LAWRENCE ISLAND. THE STORM IS FORECAST 
TO MOVE RAPIDLY NORTHEAST TODAY AND TONIGHT WITH THE CENTER 
MOVING ACROSS THE CHUKOTSK PENINSULA TONIGHT. ON WEDNESDAY 
THE STORM WILL TAKE A NORTHWESTWARD TRACK INTO THE CHUKCHI SEA.

THE STORM WILL BRING EXTREMELY STRONG WINDS TO ALL OF THE
ALASKA WEST COAST BEGINNING THIS AFTERNOON OVER ST LAWRENCE
ISLAND AND BEGINNING THIS EVENING OVER THE REMAINDER OF
THE WEST COAST...ACCOMPANIED BY WIDESPREAD MAJOR COASTAL
FLOODING AND SEVERE BEACH EROSION OVER MANY PARTS OF THE
COASTLINE. THE WIND WILL PUSH LARGE AMOUNTS OF WATER INTO NORTON 
SOUND...RAISING SEA LEVELS TO 7 TO 9 FEET ABOVE NORMAL IN NORTON 
SOUND AND ALONG THE BERING STRAIT COAST. THE EXTREMELY STRONG 
WINDS WILL PRODUCE HIGH WAVES WHICH WILL PUSH THE HIGH WATER 
FARTHER INLAND. 

OVER THE BERING STRAIT COAST AND ST LAWRENCE ISLAND...
SUSTAINED WINDS ARE EXPECTED TO REACH 75 MPH WITH MAXIMUM
GUSTS OF 90 TO 100 MPH. ALONG THE CHUKCHI COAST...WIND
SPEEDS OF 65 TO 70 MPH WITH GUSTS AS HIGH AS 90 MPH ARE 
EXPECTED. IN THE NOME AREA...SUSTAINED WINDS AS HIGH AS 
60 MPH ARE EXPECTED...WITH GUSTS TO 70 MPH. ALMOST ALL OTHER 
AREAS OF THE WEST COAST WILL EXPERIENCE MAXIMUM WIND SPEEDS 
OF AT LEAST 50 TO 60 MPH.

WIDESPREAD MAJOR COASTAL FLOODING AND SEVERE BEACH
EROSION IS EXPECTED IN THE FOLLOWING AREAS:

1. THE BERING SEA COAST FROM CAPE ROMANZOF TO POINT
   ROMANOF...ESPECIALLY THE WEST FACING SHORES.
2. ALL AREAS ALONG THE EASTERN AND NORTHERN SHORE OF NORTON
   SOUND WESTWARD TO AND INCLUDING THE BERING STRAIT COAST
   AND LITTLE DIOMEDE ISLAND.
3. SOUTH AND WEST FACING COASTLINE OF ST LAWRENCE ISLAND.
4. THE CHUKCHI SEA COAST FROM CAPE KRUSENSTERN TO POINT HOPE.

THIS INCLUDES THE VILLAGES OF NOME AND KIVALINA WHERE
MAJOR DAMAGE FROM COASTAL FLOODING AND STRONG WINDS
IS EXPECTED. THE VILLAGE OF SAVOONGA ON THE NORTH SHORE
OF ST LAWRENCE ISLAND WILL BE PROTECTED FROM COASTAL
FLOODING BUT WILL EXPERIENCE EXTREMELY STRONG AND 
DAMAGING WINDS.

ADDITIONALLY...HIGH SEA LEVELS IN NORTON SOUND WILL CAUSE
COASTAL FLOODING IN LOW LYING AREAS ALONG THE SOUTHERN SHORE.

THE STORM WILL PRODUCE BLIZZARD OR NEAR BLIZZARD CONDITIONS
OVER MOST AREAS OF THE WESTERN ALASKA MAINLAND...WITH VISIBILITY
REDUCED TO NEAR ZERO IN SNOW AND BLOWING SNOW. PEOPLE ARE URGED
TO SEEK SHELTER NOW AND POSTPONE TRAVEL INTO THE BACK COUNTRY
UNTIL THE STORM ABATES.

ALL BOAT OPERATORS SHOULD SEEK SAFETY IN PORT IMMEDIATELY
IF THEY HAVE NOT ALREADY DONE SO. IN AREAS WHERE BEACH
EROSION AND COASTAL FLOODING IS EXPECTED...SMALL BOATS
AND PERSONAL PROPERTY SHOULD BE MOVED WELL AWAY FROM THE 
SHORE AND TO HIGHER GROUND.

AGAIN...THIS WILL BE EXTREMELY DANGEROUS AND LIFE THREATENING
STORM OF AN EPIC MAGNITUDE RARELY EXPERIENCED. ALL PEOPLE
IN THE AREA SHOULD TAKE PRECAUTIONS TO SAFEGUARD THEIR LIVES
AND PROPERTY.

Denne video er fra Nome, og viser en forløber for selve stormen :

{youtube}8M2CwRBeTTg{/youtube} 

De første rapporter fra området melder om flere huse uden tage i Nome og 10 meter høje bølger. Vindstød op i nærheden af 100 mph.

Endnu et stormsystem ligger i Beringshavet og vil ramme samme områe senere i dag.

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