Small Craft Advisory 480, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
1200 PM ADT FRI JUN 10 2005

.DISCUSSION...

.500MB...WEAK OMEGA BLOCK SETS UP AS HIGH PRESSURE BUILDS OVER
MAINLAND ALASKA AND LOW CENTERS CUT-OFF OVER THE GULF AND WESTERN
BERING SEAS SUN AND MON. EXPECT PATTERN MAY SHIFT A LITTLE BUT
SHOULD HOLD THROUGH TUE NIGHT.

.SURFACE...
LOW COMPLEX OVER THE GULF OF ALASKA CONTINUES TO WEAKEN AND DRIFTS
SLOWLY SOUTH. WEAK RIDGE BUILDS ALONG THE NORTH GULF COAST OVER THE
NEXT COUPLE OF DAYS. THERMAL TROUGH OVER THE INTERIOR INTENSIFIES
SATURDAY WITH WARMING 850 MB TEMPS ALSO A WEAK 700 MB SHORT WAVE
MOVES THROUGH THE REGION. STABILITY INDICES INDICATE THAT THE
NORTHERN COPPER RIVER BASIN...WEST ALONG THE SPINE OF ALASKA
RANGE...TO OVER THE KUSKOKWIM VALLEY/DELTA ARE LIKELY TO EXPERIENCE
AFTERNOON AND EVENING THUNDERSTORMS SAT. INTERIOR BRISTOL BAY
APPEARS TO BE ON THE EASTERN EDGE OF GREATER INSTABILITY...BUT WILL
PROB BE CLOSE ENOUGH TO SEE SOME THUNDERSTORM ACTIVITY. THERMAL
THROUGH SHIFTS NORTH SOME ON SUN AND STABILITY INDICES BECOME LESS
FAVORABLE FOR WIDESPREAD THUNDERSTORM ACTIVITY OVER AOR. HIGH
PRESSURE RIDGE OVER THE WESTERN ALEUTIANS SHIFTS TO THE EASTERN
BERING SEA SUN AFTERNOON. LOW MOVING TO SOUTHWEST OF SHEMYA SUN
AFTERNOON BRINGS GALES TO THE WESTERN ALEUTIANS.

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

RMC JUN 05