Gale Warning 1051, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
300 PM AST SUN DEC 11 2005

.DISCUSSION...THE COLD AIR THAT IS IN SOUTHWEST ALASKA HAS BEEN SLOW
TO ADVECT INTO AREAS EAST OF THE ALASKA RANGE. KUSKOKWIM VALLEY AND
BRISTOL BAY HAVE SEEN THEIR TEMPERATURES SLOWLY DROPPING THROUGH THE
DAY ALONG WITH LIGHT SNOW OVER MUCH OF THESE AREAS AS THE COLD FRONT
PUSHES THROUGH. THIS FRONT WILL SPILL OVER THE ALASKA RANGE OVERNIGHT
AND INTO SOUTH CENTRAL ALASKA WHERE IT WILL MEET UP WITH MOISTURE
BEING PUMPED INTO THE AREA FROM A LOW IN PRINCE WILLIAM SOUND. RESULT
SHOULD BE SNOW OVERNIGHT INTO MONDAY MORNING FOR MUCH OF SOUTH
CENTRAL.

UPPER LEVELS...THE JET STREAM CONTINUES TO DEPART ASIA OVER JAPAN AND
HEAD DUE EAST ALONG THE 35N PARALLEL. THIS MAIN SECTION OF THE JET
STREAM WILL MAINLY REMAIN IN PLACE THROUGH MID WEEK. ONE INFLUENCE
THIS JET WILL HAVE IN SOUTHERN ALASKA IS THAT IT WILL SPLIT INTO TWO
SECTIONS MONDAY...AT THE 180 MERIDIAN. THE NORTHERN SECTION WILL HEAD
OVER THE ALASKA PENINSULA BY TUESDAY AND TIGHTEN UP THE UPPER LEVEL
WINDS OVER THE NORTHERN GULF AT THAT TIME AS WELL AS AN UPPER LEVEL
HIGH BEGINS TO BUILD INTO SOUTH CENTRAL ALASKA FROM THE SOUTHEAST.
THIS UPPER HIGH WILL BUILD INTO THE AREA IN A MORE PRONOUNCED WAY IN
THE LATTER PART OF THE WEEK.

OUT WEST...A LARGE LOW WEST OF ATTU IS SENDING A WEATHER FRONT TOWARD
THE WESTERN ALEUTIAN ISLANDS FROM THE SOUTH. A SECONDARY LOW WILL
DEVELOP ALONG THIS FRONT SOUTH OF ADAK TONIGHT AND INTENSIFY TO
AROUND 980 MB AS IT MOVE TO NEAR ADAK MONDAY AFTERNOON. THIS LOW WILL
CONTINUE TO SLOWLY INTENSIFY AT IT RETROGRADES BACK TO THE NORTHWEST
ALONG THE OLD FRONT. A NEW LOW WILL DEVELOP IN THE AFORE MENTIONED
NORTHERN BRANCH OF THE JET STREAM AND MOVE INTO BRISTOL BAY TUESDAY
NIGHT AT AROUND 975 MB. THIS SYSTEM WILL BEAR WATCHING DUE TO THE
VERY TIGHT PRESSURE GRADIENT SETTING UP BETWEEN THIS LOW AND THE HIGH
BUILDING IN FROM THE EAST.

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

DEC 05