Small Craft Advisory 155, NWS Anchorage, AK

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
200 PM AKST SUN FEB 17 2013

SOUTHERN AND FASTER PORTION OF UPPER TROF MOVING EAST OUT OF BRISTOL
BAY AND IS NOW ENTERING THE GULF OF ALASKA. THIS FEATURE WILL QUICKLY
MOVE SOUTHEAST OUT OF THE FORECAST AREA TONIGHT. WINDIER,DRIER AND
COLDER CONDITIONS FOLLOWING IN BEHIND. AXIS OF THE MUCH SLOWER
NORTHERN PORTION OF THE TROF NOT EXPECTED TO CROSS 150 W UNTIL MID
DAY MON, WHICH MEANS SNOW WILL BE SLOW TO END ACROSS SOUTH CENTRAL
ALASKA WITH THE HEAVIEST AMOUNTS OCCURRING LATER TONIGHT. SNOW ACROSS
THE SUSITNA VALLEY AND KENAI PENINSULA WILL END MONDAY MORNING AS
HIGH PRESSURE BUILDS IN FROM THE WEST. SNOWFALL OVER ZONE 141 MAY NOT
END UNTIL LATE MON EVE. WINDS WILL BE SLOW TO INCREASE OVER SUN NIGHT
THEN SHOULD INCREASE AND BECOME RATHER STRONG MON AND MON EVE WHEN
UPPER SUPPORT IS BEST. GALES ALREADY BEGINNING ACROSS THE KODIAK
MARINE ZONES AS THE FASTER SOUTHERN TROF MOVES OUT.

HIGH PRESSURE MOVES ACROSS SOUTHERN ALASKA MON NIGHT AHEAD OF NEXT
BERING STORM. THE ASSOCIATED FRONT SHOULD MAKE LANDFALL MON EVENING.
WAVE FORMING ALONG THE FRONT FORECAST BY THE GFS TO DEVELOP INTO A
MODERATE 978 MB STORM AND BRING MORE RAIN SNOW AND WIND TO THE ALASKA
PENINSULA, KODIAK ISLAND AND BRISTOL BAY ON LATE MON AND TUE. THIS
LOW SHOULD DROP INTO THE GULF LATE TUE AND WED AS HIGH PRESSURE ONCE
AGAIN BUILDS OVER THE EASTERN BERING SEA ALONG 165W. SEVERAL WEAKER
SYSTEMS WILL MOVE EASTWARD ALONG THE SOUTHERN BERING SEA WED THU AND
FRI AND WILL DISSIPATE AS THEY RUN INTO THE RIDGE OVER EASTERN
BRISTOL BAY AND KODIAK ISLAND. A STRONGER STORM WILL BRING GALES BACK
TO THE ALEUTIANS LATE IN THE WEEK AS A 972 MB CENTER MOVES TO NEAR
ADAK MIDDAY FRIDAY.

NO CHANGE THE NEXT 5 TO 7 DAYS AS THE PATTERN STAYS RATHER
PROGRESSIVE WITH NO SIGN OF ANY KIND OF BLOCK OCCURRING.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...BLIZZARD WATCH 131 AND 195.
MARINE...STORM AREAS 130 179 185 411 412 413 414.
GALE AREAS 120 127 132 136 137 138 140 150 160 165 170 180 171 172
175 176.
HEAVY FREEZING SPRAY AREAS 121 127 129 130 138 140 150 155 165.
FIRE WEATHER...NONE.

DP FEB 13