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HYDROMETEOROLOGICAL DISCUSSION
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK
300 PM AKDT TUE FEB 6 2012

...FLOOD POTENTIAL...
MUCH LIKE A WEEK AGO A DEVELOPING LOW MOVING NORTH FROM THE NORTH
PACIFIC IS FORECAST TO BRING RAIN AND WARM TEMPERATURES TO KODIAK
GULF COAST.. AND SOUTHEAST ALASKA ON WEDNESDAY AND INTO THURSDAY. 
THIS COULD LEAD TO LOCAL PROBLEMS WITH PONDED WATER DUE TO BLOCKED
CULVERTS AND POOR DRAINAGE.

THE FLOOD POTENTIAL IS CURRENTLY LOW FOR THE STATE OF ALASKA.  

...HYDROMETEOROLOGICAL DISCUSSION...
EARLY IN THE PERIOD A LOW MOVED THROUGH SHELIKOF STRAIT AND UP INTO
SOUTHCENTRAL ALASKA WHILE A SECONDARY LOW MOVED NORTH OUT OF THE
EASTERN PACIFIC... JUST OFF THE COAST OF SOUTHEAST ALASKA. HEAVY
RAIN FELL AT LOWER ELEVATIONS FROM THE PANHANDLE TO THE NORTH GULF
WITH HEAVY SNOW AT HIGHER AND MORE INTERIOR LOCATIONS. LASTLY A
TROUGH/SHORT WAVE MOVED THROUGH SOUTHCENTRAL LAST FRIDAY BLANKETING
MUCH OF THE COOK INLET REGION IN ONE TO TWO FEET OF FRESH POWDER. 

MORE RECENTLY A LONG WAVE TROUGH OVER EASTERN RUSSIA/BERING SEA AND
A HIGHLY AMPLIFIED RIDGE EXTENDING INTO ALASKA FROM THE WESTERN US
BROUGHT MILDER AIR AND DRIER CONDITIONS TO MUCH OF THE STATE.
SOUTHERLY FLOW AROUND THE LOW WILL BRING A COUPLE OF SYSTEMS INTO
THE GULF OVER THE NEXT COUPLE OF DAYS. THE FRONT ASSOCIATED WITH THE
FIRST SYSTEM REACHES THE SOUTHERN WEDNESDAY MORNING WHILE THE
TRAILING EDGE SWINGS THROUGH THE PANHANDLE. 

...SNOW DEPTHS...
OVER THE LAST 7 DAYS SNOW DEPTHS CHANGED LITTLE ACROSS INTERIOR AND
NORTHERN ALASKA.  SNOW DEPTHS DECREASED AT LOWER ELEVATION SITES
ALONG THE SOUTHERN COAST AND PANHANDLE... MOST NOTABLY AT YAKUTAT
WHICH REPORTED A LOSS OF 32 INCHES. SNOW DEPTHS INCREASED
AT MOST REPORTING SITES IN SOUTHCENTRAL/COOK INLET REGION. 

...SNOW WATER EQUIVALENT...
AS OF EARLY FEBRUARY THE SNOW WATER EQUIVALENT AT SNOW COURSE SITES
WAS NORMAL TO WELL ABOVE NORMAL ACROSS THE STATE WITH AT OR BELOW
NORMAL CONDITIONS IN THE CHENA BASIN.

...ICE THICKNESS...
ICE THICKNESSES REPORTED AROUND JANUARY 1 WERE GENERALLY BETWEEN 17
AND 23 INCHES.  EAGLE ON THE YUKON RIVER REPORTED 30 INCHES..
COLVILLE VILLAGE ON THE COLVILLE RIVER REPORTED 39 INCHES.. AND
BETHEL ON THE KUSKOKWIM RIVER REPORTED 27 INCHES.   

....................................................................
THE HYDROMET DISCUSSION WILL BE ISSUED WEEKLY THROUGH THE WINTER.
A GRAPHICAL VERSION OF THE HYDROMET DISCUSSION IS AVAILABLE AT
HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/GHMD.PHP  

$$
ETH


National Weather Service
Alaska-Pacific River Forecast Center
6930 Sand Lake Road
Anchorage, Ak 99502
907-266-5160

Page Modified: 29 Dec 2005 18:00 UTC
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