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256
FXAK69 PAFG 231204
AFDAFG

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
404 AM AKDT WED APR 23 2014

.DISCUSSION...

ALOFT...CURRENTLY TWO CENTERS OF HIGH PRESSURE ALOFT ONE A 546
DAM HIGH STILL OVER THE CENTER OF THE STATE WEAKENING SLIGHTLY
SINCE THIS AFTERNOON AND ANOTHER 546 DAM HIGH SOUTH OF BANKS
ISLAND. A WEAK UPPER LEVEL LOW JUST SOUTH OF BARROW WILL NOT MAKE
IT OVER THE RIDGE AND SINK BACK DOWN TO THE SOUTHWEST TOWARD THE
SEWARD PENINSULA ON WEDNESDAY. ISOLATED TO SCATTERED SNOW SHOWERS
WILL BE ASSOCIATED WITH THIS FEATURE FOR NORTHWEST ALASKA AND
ALONG THE BERING STRAIT ON THURSDAY.

SURFACE...MODELS IN GOOD AGREEMENT THROUGH 60 HOURS.
A 986 MB LOW ABOUT 175 NM NORTHEAST OF ADAK WILL WEAKEN AND FILL
ON WEDNESDAY. ANOTHER LOW WILL MOVE TOWARDS THE CENTRAL ALEUTIANS
FROM THE SOUTH ON THURSDAY. A 1034 MB HIGH IS LOCATED SOUTHEAST
OF BANKS ISLAND. WEAK HIGH PRESSURE REMAINS OVER MUCH OF THE
STATE. A WEAK THERMAL TROUGH WILL SET UP OVER THE SOUTHERN
INTERIOR WEDNESDAY AFTERNOON AND LINGER INTO FRIDAY.

NORTH SLOPE...SOME LINGERING SNOW SHOWERS ASSOCIATED WITH THE
UPPER LOW FROM BARROW WEST THIS MORNING...OTHERWISE EASTERLY
FLOW WILL REMAIN OVER THE NORTH SLOPE WITH STRATUS FOG AND
FLURRIES LINGERING INTO THURSDAY.

WEST COAST...AS THE UPPER LEVEL LOW SINKS BACK DOWN ACROSS
NORTHWEST ALASKA EXPECTED ISOLATED TO SCATTERED SNOW SHOWERS
ON WEDNESDAY. THE LOW WILL CONTINUE TO MOVE SOUTHWEST OVER
THE BERING STRAIT ON THURSDAY. THIS WILL BRING ISOLATED TO
SCATTERED SHOWERS FOR THE BERING STRAIT AND SAINT LAWRENCE
ISLAND ON THURSDAY.

INTERIOR...SNOW MELT CONTINUES WITH TEMPERATURES REMAINING IN
THE LOWER TO MID 50S FOR HIGHS. ISOLATED SHOWERS ALONG THE
THERMAL TROUGH ALSO ENHANCED BY A SERIES OF EASTERLY WAVES
MOVING UP FROM THE SOUTHEAST BUT ONLY LOW TOP CONVECTION EXPECTED
AND NO LIGHTNING.

FIRE WEATHER...EXPECT RH VALUES IN THE 20S AND 30S AGAIN FOR
WEDNESDAY. A SLIGHT INCREASE IN VALUES ON THURSDAY AND FRIDAY
AS MOISTURE MOVES UP FROM THE SOUTHEAST.

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$

JK APR 14




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