Small Craft Advisory 598, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 PM ADT SUN JUL 31 2005

.DISCUSSION...
THE UPPER LOW NEAR FAIRBANKS WILL MOVE BACK INTO THE NORTHERN YUKON
TERRITORY TUESDAY AFTERNOON. THE VORTICITY MAX WHICH EXTENDS INTO THE
SUSITNA VALLEY WILL REMAIN OVER THE AREA THROUGH MONDAY AFTERNOON
THEN WEAKEN THROUGH MONDAY NIGHT. SCATTERED SHOWERS ARE WILL PERSIST
OVER SOUTHCENTRAL ALASKA THROUGH MONDAY. ISOLATED THUNDERSTORMS WILL
DEVELOP OVER THE SUSITNA VALLEY THIS EVENING AND AGAIN MONDAY
EVENING.

A RIDGE OF HIGH PRESSURE OVER SOUTHEAST WILL BUILD INTO THE CENTRAL
GULF COAST MONDAY AND TUESDAY. A 996 MB LOW SOUTH OF DUTCH HARBOR
WILL MOVE TO 500 MILES SOUTH OF SEWARD WITH LITTLE CHANGE IN
PRESSURE. THE WARM FRONT WILL MOVE INTO KODIAK ISLAND AND THE
SOUTHWEST GULF OF ALASKA MONDAY NIGHT AND SWING NORTH INTO THE
CENTRAL GULF TUESDAY AFTERNOON. LIGHT RAIN WILL MOVE INTO KODIAK
ISLAND MONDAY NIGHT AND SPREAD INTO THE KENAI PENINSULA TUESDAY
AFTERNOON.

OVER THE SOUTHWEST INTERIOR, CONDITIONS REMAIN UNSTABLE BUT THE AREA
OF GREATEST INSTABILITY HAS SHIFTED SOUTH AND WEST TO LIE MAINLY OVER
WESTERN KUSKOKWIM VALLEY, THE ISLAND SECTION OF THE KUSKOKWIM DELTA
AND BRISTOL BAY. THESE WILL BE THE PRIME AREAS OF THUNDERSTORMS THIS
AFTERNOON AND EVENING. COOLER AIR AT 850 MB OVER THE CENTRAL INTERIOR
WILL SPREAD INTO SOUTHWEST ALASKA STABILIZING CONDITION AND BIT
MONDAY AND TUESDAY. THE NUMBER OF THUNDERSTORMS IS EXPECTED TO DROP
OFF OVER THE NEXT 2 DAYS.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE AREA 170.
FIRE WEATHER...NONE.

NM JUL 05