Small Craft Advisory 830, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTH CENTRAL AND SOUTHWEST ALASKA
200 PM ADT TUE SEP 12 2006

.DISCUSSION...
.ALOFT.  A CLOSED UPPER LOW SOUTH OF DUTCH HARBOR WILL MOVE NORTH TO
BRISTOL BAY BY SAT AND LINK WITH A STRONG UPPER TROUGH OVER EASTERN
SIBERIA THU THROUGH SAT. A LARGE AMPLITUDE UPPER RIDGE OVER THE
WESTERN MAINLAND WILL MOVE TO THE CANADIAN BORDER BY THU NIGHT.  THE
HIGH WILL CUT OFF AND MOVE TO BANKS ISLAND WITH A RIDGE EXTENDING
OVER NORTHERN ALASKA BY SAT.

.SURFACE.  A 986 MB LOW 700 NM SOUTH OF DUTCH HARBOR WILL MOVE TO 350
NM SOUTH OF DUTCH HARBOR BY WED AFTERNOON AND TO NEAR COLD BAY BY THU
AFTERNOON.  THE ASSOCIATED FRONT WILL MOVE NORTH TO THE EASTERN
ALEUTIANS AND WESTERN ALASKA PENINSULA BY WED AFTERNOON AND TO THE
YUKON DELTA TO KODIAK BY THU AFTERNOON.  A STRONG RIDGE WILL BUILD
FROM THE NORTHERN PANHANDLE TO PRINCE WILLIAM SOUND THU MORNING
THROUGH FRI.  A FRONT OVER THE WESTERN BERING WILL MOVE TO THE
CENTRAL BERING AND BECOME STATIONARY BY WED AFTERNOON.

.WEATHER.  A NARROW BAND OF RAIN WILL MOVE FROM THE WESTERN ALEUTIANS
TO THE CENTRAL ALEUTIANS TONIGHT WITH THE WESTERN BERING FRONT.  RAIN
AND GALE FORCE WINDS WILL SPREAD OVER THE EASTERN ALEUTIANS AND
ALASKA PENINSULA WED IN ADVANCE OF THE LOW APPROACHING FROM THE
SOUTH.  THE WIND AND RAIN WILL SPREAD TO KODIAK ISLAND AND THE
SOUTHWEST MAINLAND BY THU MORNING AND TO THE WESTERN NORTH GULF COAST
AND THE KUSKOKWIM VALLEY THU AFTERNOON. INCREASING PRESSURE GRADIENTS
DUE TO THE APPROACHING FRONT FROM THE WEST AND RIDGING FROM THE EAST
WILL BRING STRONG EAST WINDS TO TURNAGAIN ARM AND AREAS PRONE TO EAST
WINDS IN SOUTH CENTRAL THU AND FRI.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...FLOOD ADVISORY ZONE 141
MARINE...GALE 150 155 170 171 176 185 410 130 138 132 160 165

RHH SEP 06