Small Craft Advisory 161, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 AM AST WED FEB 14 2007

.DISCUSSION...
GENERALLY WEAK FLOW ALOFT OVER ALASKA. THE UPPER STEERING LOW IS
CENTERED OVER THE WESTERN BERING SEA. THERE IS AN UPPER RIDGE
NORTHWEST OF ALASKA...A PINCHED OFF REMNANT OF WHAT A COUPLE OF
WEEKS AGO WAS A FULL LATITUDE RIDGE AT AROUND 130 WEST. THERE ARE
WEAK HINTS OF THIS RIDGE ALONG THE EASTERN BORDER OF THE STATE. THE
MAIN JET STREAM IS WELL SOUTH...RUNNING AT AROUND 30 NORTH FROM ASIA
TO ABOUT THE DATE LINE THEN PUSHING NORTHEAST TOWARD WASHINGTON
STATE. A WEAK LOW IN THE NORTHERN GULF IS PROVIDING SOME WINDS AND
PRECIPITATION TO COASTAL AREAS...BUT MAINLY CLOUDS INLAND. ANOTHER
WEAK LOW IS SOUTH OF THE COLD BAY. THESE TWO LOWS WILL MOVE ONLY
VERY SLOWLY AND CONTINUE TO WEAKEN FOR THE NEXT SEVERAL DAYS.

A LOW THAT IS CURRENTLY OVER THE SEA OF JAPAN WILL MOVE EAST AND
BE NEAR THE DATELINE ON FRIDAY. AS IT MOVES INTO THE BERING SEA
FRIDAY NIGHT A PATTERN SHIFT WILL BEGIN...FROM ITS CURRENT ZONAL
NATURE TO A MORE AMPLIFIED PATTERN. THIS WILL RESULT IN THE MEAN
LOW POSITION SHIFTING EASTWARD...AND PROGRESSIVELY MORE CYCLONIC
FLOW OVER ALASKA.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...NONE.
FIRE WEATHER...NONE.

LUDWIG FEB 07