Small Craft Advisory 339, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 PM ADT SUN APR 17 2005

.DISCUSSION...
BOTH MESO-ETA AND GFS HAVE VERY SIMILAR SOLUTION, THOUGH I LIKE
PREFER THE GFS.

THE UPPER LOW OVER THE CENTRAL INTERIOR WILL DRIFT INTO NORTHEAST
ALASKA AND DISSIPATE TUESDAY AFTERNOON. AN UPPER TROUGH WILL FORM
OVER SOUTHWEST ALASKA SUNDAY NIGHT AND WILL PERSIST THROUGH TUESDAY.
AN UPPER RIDGE WILL BUILD INTO THE EAST GULF OF ALASKA TONIGHT AND
INTO BRITISH COLUMBIA MONDAY.

THIS PATTERN WILL PRODUCE A SOUTHWEST FLOW OVER THE GULF OF ALASKA
AND SOUTHCENTRAL ALASKA WHICH WILL BRING MORE MOISTURE INTO THE
SOUTHEAST MAINLAND BEGINNING TONIGHT.

AT THE SURFACE...AN ARCTIC FRONT OVER THE WESTERN COPPER RIVER BASIN,
KENAI PENINSULA AND BRISTOL BAY WILL REMAIN NEAR STATIONARY THROUGH
TUESDAY.

A 991 MB LOW 360 MILES SOUTH OF ATKA WILL MOVE TO 300 MILES SOUTHWEST
OF KODIAK AND WEAKEN TO 1003 TUESDAY AFTERNOON. A 998 MB LOW WILL
DEVELOP 260 MILES SOUTHWEST OF KODIAK TONIGHT AND WILL DISSIPATE NEAR
PRINCE WILLIAM SOUND MONDAY NIGHT. A 1006 MB LOW 450 MILES SOUTH OF
THE KAMCHATKA PENINSULA WILL 240 MILES SOUTHWEST OF ADAK AND
STRENGTHEN TO 993 MB TUESDAY AFTERNOON.

MORE CLOUDS WILL BEGIN TO MOVE INTO GULF OF ALASKA AND KODIAK ISLAND
TODAY AND WILL SPREAD INTO SOUTHCENTRAL ALASKA TONIGHT AND MONDAY.
AREA OF RAIN AND SNOW WILL DEVELOP OVER KODIAK ISLAND THIS EVENING
AND WILL SPREAD INTO PRINCE WILLIAM SOUND AND THE EASTERN KENAI
PENINSULA BY MONDAY MORNING. AREAS OF LIGHT RAIN AND SNOW WILL MOVE
INTO THE SOUTHCENTRAL INTERIOR MONDAY EVENING.

RAIN OVER THE ALEUTIANS WILL BECOME SHOWERS LATE TONIGHT AND MONDAY
MORNING.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE 6B, 12AB, 13AB, 15.
FIRE WEATHER...NONE.

NM APR 05