Small Craft Advisory 214, NWS Anchorage, AK

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 PM AST WED FEB 28 2007

.DISCUSSION...
MODELS ARE IN FAIRLY GOOD AGREEMENT.

UPPER AIR...
THE UPPER TROUGH OVER THE YUKON TERRITORY WILL DIG SOUTHWARD INTO THE
EASTERN GULF OF ALASKA THURSDAY AND WILL FORM AN UPPER LOW OVER THE
GULF FRIDAY. AN UPPER RIDGE WILL RIDGE WITH THE HIGH PRESSURE OVER
THE GULF OF ALASKA THURSDAY AND WILL PERSIST THROUGH FRIDAY. A
NORTHERLY JET OVER THE CENTER PART OF THE STATE WILL WILL CONTINUE
THROUGH FRIDAY. THIS PATTERN WILL CONTINUE TO KEEP MOST OF MAINLAND
ALASKA CLEAR AND CLOD THROUGH FRIDAY. GUSTY NORTH SURFACE WINDS
SUPPORTED BY THE UPPER JET WILL DEVELOP DOWN THE SUSITNA VALLEY AND
THROUGH MOUNTAIN PASSES ALONG THE ALASKA RANGE AND CHUGACH MOUNTAINS.

AT SURFACE...
EAST DOMAIN...
AN AREA OF HIGH PRESSURE WILL BUILD INTO THE CENTRAL MAINLAND TONIGHT
AND WILL PERSIST THROUGH FRIDAY. A LOW OVER THE CENTRAL GULF OF
ALASKA WILL MOVE TO KETCHIKAN FRIDAY. THE PRESSURE GRADIENT OVER
SOUTHCENTRAL ALASKA WILL TIGHTEN THROUGH THE FRIDAY WITH STRONG WINDS
DEVELOPING OVER THE SUSITNA VALLEY AND COOK INLET AND THROUGH
CHANNELED TERRAIN ALONG THE CENTRAL GULF COAST AND ALASKA RANGE. LOW
WIND CHILL TEMPERATURES WILL DEVELOP IN THE WINDIER AREAS.

LIGHT SNOW OVER KODIAK ISLAND WILL END THIS AFTERNOON THEN SKIES WILL
CLEAR THROUGH TONIGHT. OTHERWISE CLEAR AND COLD WEATHER WILL CONTINUE
THROUGH FRIDAY.

WEST DOMAIN...
THE MODERATE LOW SOUTH OF THE CENTRAL ALEUTIANS WILL START TO DRIFT
SOUTHEAST INTO THE NORTH PACIFIC THURSDAY AND WILL DISSIPATE FRIDAY.
HIGH PRESSURE WILL BUILD SOUTH FROM THE CHUKCHI SEA INTO THE NORTHERN
AND EASTERN BERING SEA FRIDAY.

AREAS OF RAIN ALONG THE ALEUTIANS WILL CONTINUE THROUGH THURSDAY THEN
DIMINISH THURSDAY NIGHT.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...HIGH WIND WARNING FOR THOMPSON PASS AND THE COPPER RIVER.
         DELTA.
         HIGH WIND WATCH FOR THE MATANUSKA VALLEY.
MARINE...GALE 120, 121, 125, 138, 140 141, 155, 170, 171, 172, 175,
         176, 179, 185
         HEAVY FREEZING SPRAY 120, 121, 125, 129, 130, 138, 140, 141,
         185
FIRE WEATHER...NONE.

NM FEB 07