Gale Warning 313, NWS Anchorage, AK

912 
FZAK62 PAFC 131146
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
346 AM AKDT MON APR 13 2015

OFFSHORE WATERS FORECAST FOR THE BERING SEA

WIND FORECASTS REFLECT THE PREDOMINANT SPEED AND DIRECTION
EXPECTED. SEA FORECASTS REPRESENT AN AVERAGE OF THE HIGHEST
ONE-THIRD OF THE COMBINED WIND WAVE AND SWELL HEIGHT.

PKZ499-140115-
346 AM AKDT MON APR 13 2015
.SYNOPSIS FOR CENTRAL BERING SEA...A 972 MB LOW NEAR 48N 178W
MOVES TO 52N 161W AT 974 MB MON NIGHT BEFORE MOVING INTO THE GULF
OF ALASKA TUE NIGHT.

$$

PKZ411-140115-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
346 AM AKDT MON APR 13 2015

.TODAY...N WIND 10 TO 25 KT. SEAS 3 TO 7 FT.
.TONIGHT...NW WIND 10 TO 20 KT. SEAS 3 TO 7 FT.
.TUE...W WIND 10 TO 20 KT. SEAS 6 FT.
.TUE NIGHT...SW WIND UP TO 15 KT. SEAS 4 TO 7 FT.
.WED...E WIND UP TO 20 KT. SEAS 4 TO 9 FT.
.THU THROUGH FRI...N WIND 20 TO 35 KT. SEAS 6 TO 10 FT.

$$

PKZ412-140115-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
346 AM AKDT MON APR 13 2015

...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY...

.TODAY...NE WIND 10 TO 25 KT. SEAS 3 TO 6 FT. HEAVY FREEZING
SPRAY ALONG THE ICE EDGE.
.TONIGHT...NE WIND 10 TO 25 KT. SEAS 3 TO 7 FT. HEAVY FREEZING
SPRAY.
.TUE...N TO W WIND 10 TO 25 KT. SEAS 3 TO 7 FT. HEAVY FREEZING
SPRAY.
.TUE NIGHT...W WIND UP TO 20 KT. SEAS 3 TO 6 FT.
.WED...S WIND UP TO 20 KT. SEAS 3 TO 5 FT.
.THU...E WIND 20 TO 35 KT. SEAS 5 TO 10 FT.
.FRI...N WIND 30 TO 40 KT. SEAS 7 TO 12 FT.

$$

PKZ413-140115-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
346 AM AKDT MON APR 13 2015

...GALE WARNING TODAY...

.TODAY...NE WIND 25 TO 40 KT. SEAS 6 TO 11 FT. SNOW.
.TONIGHT...N WIND 15 TO 30 KT. SEAS 7 TO 12 FT. SNOW SHOWERS.
FREEZING SPRAY.
.TUE...N WIND 15 TO 30 KT. SEAS 6 TO 11 FT. FREEZING SPRAY.
.TUE NIGHT...NW WIND 10 TO 25 KT. SEAS 5 TO 8 FT.
.WED...S WIND 10 TO 25 KT. SEAS 6 FT.
.THU...NE WIND 20 TO 30 KT. SEAS 7 TO 10 FT.
.FRI...N WIND 25 TO 40 KT. SEAS 8 TO 12 FT.

$$

PKZ414-140115-
BERING SEA OFFSHORE EAST OF 171W-
346 AM AKDT MON APR 13 2015

...GALE WARNING TODAY...
...HEAVY FREEZING SPRAY WARNING TONIGHT AND TUESDAY...

.TODAY...NE WIND INCREASING TO 20 TO 35 KT. SEAS 3 TO 7 FT.
FREEZING SPRAY.
.TONIGHT...NE WIND 20 TO 30 KT. SEAS 5 TO 10 FT. SNOW. HEAVY
FREEZING SPRAY N OF 56N.
.TUE...N WIND 30 KT. SEAS 6 TO 11 FT. HEAVY FREEZING SPRAY ALONG
THE ICE EDGE.
.TUE NIGHT...N WIND 15 TO 30 KT. SEAS 5 TO 10 FT.
.WED...W WIND 10 TO 25 KT. SEAS 3 TO 7 FT.
.THU THROUGH FRI...E WIND 20 TO 35 KT. SEAS 3 TO 8 FT.

$$

481 
FZAK62 PAFC 132304
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
304 PM AKDT MON APR 13 2015

OFFSHORE WATERS FORECAST FOR THE BERING SEA

WIND FORECASTS REFLECT THE PREDOMINANT SPEED AND DIRECTION
EXPECTED. SEA FORECASTS REPRESENT AN AVERAGE OF THE HIGHEST
ONE-THIRD OF THE COMBINED WIND WAVE AND SWELL HEIGHT.

PKZ499-141400-
304 PM AKDT MON APR 13 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 972 MB LOW NEAR 50N 169W WILL MOVE TO 54N 155W TUE AFTERNOON AT
980 MB BEFORE MOVING INTO THE GULF OF ALASKA TUE NIGHT. A
KAMCHATKA LOW WILL MOVE TO 49N 175E AT 988 MB WED AFTERNOON.

$$

PKZ411-141400-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
304 PM AKDT MON APR 13 2015

.TONIGHT...NW WIND 10 TO 20 KT. SEAS 3 TO 7 FT.
.TUE...W WIND 10 TO 20 KT. SEAS 4 TO 6 FT.
.TUE NIGHT...SW WIND 10 TO 15 KT. SEAS 4 TO 7 FT.
.WED...S WIND UP TO 15 KT. SEAS 4 TO 7 FT.
.WED NIGHT...NE WIND UP TO 20 KT. SEAS 4 TO 9 FT.
.THU THROUGH SAT...NW WIND 20 TO 35 KT. SEAS 6 TO 10 FT.

$$

PKZ412-141400-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
304 PM AKDT MON APR 13 2015

...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY...

.TONIGHT...NE WIND 10 TO 25 KT. SEAS 3 TO 7 FT. HEAVY FREEZING
SPRAY E OF 176W.
.TUE...NW WIND 10 TO 25 KT. SEAS 3 TO 7 FT. HEAVY FREEZING
SPRAY E OF 176W.
.TUE NIGHT...W WIND 10 TO 20 KT. SEAS 3 TO 6 FT.
.WED...SW WIND UP TO 15 KT. SEAS 3 TO 5 FT.
.WED NIGHT...SE WIND UP TO 20 KT. SEAS 3 TO 5 FT.
.THU...E WIND 20 TO 35 KT. SEAS 5 TO 10 FT.
.FRI...N WIND 30 TO 40 KT. SEAS 7 TO 12 FT.
.SAT...NW WIND 30 TO 40 KT. SEAS 6 TO 11 FT.

$$

PKZ413-141400-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
304 PM AKDT MON APR 13 2015

...GALE WARNING TONIGHT...

.TONIGHT...N WIND 15 TO 35 KT. SEAS 7 TO 12 FT. SNOW SHOWERS.
FREEZING SPRAY.
.TUE...N WIND 15 TO 30 KT. SEAS 6 TO 11 FT. FREEZING SPRAY.
.TUE NIGHT...NW WIND 10 TO 25 KT BECOMING W AFTER MIDNIGHT. SEAS
5 TO 8 FT.
.WED...SW WIND 15 KT. SEAS 6 FT.
.WED NIGHT...SE WIND 15 TO 25 KT. SEAS 7 FT.
.THU...NE WIND 20 TO 30 KT. SEAS 7 TO 10 FT.
.FRI...N WIND 25 TO 40 KT. SEAS 8 TO 12 FT.
.SAT...NW WIND 25 TO 40 KT. SEAS 10 TO 13 FT.

$$

PKZ414-141400-
BERING SEA OFFSHORE EAST OF 171W-
304 PM AKDT MON APR 13 2015

...GALE WARNING TONIGHT AND TUESDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY NIGHT...

.TONIGHT...NE WIND 20 TO 35 KT. SEAS 7 TO 12 FT. SNOW. HEAVY
FREEZING SPRAY ALONG THE ICE EDGE.
.TUE...N WIND 30 KT. SEAS 7 TO 12 FT. HEAVY FREEZING SPRAY ALONG
THE ICE EDGE.
.TUE NIGHT...N WIND 15 TO 35 KT. SEAS 8 TO 12 FT. HEAVY FREEZING
SPRAY ALONG THE ICE EDGE.
.WED...NW WIND 10 TO 25 KT. SEAS 3 TO 7 FT.
.WED NIGHT...S WIND UP TO 20 KT. SEAS 3 TO 6 FT.
.THU THROUGH FRI...E WIND 20 TO 35 KT. SEAS 3 TO 8 FT.
.SAT...W WIND 20 TO 35 KT. SEAS 5 TO 10 FT.

$$

783 
FZAK62 PAFC 141106
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
306 AM AKDT TUE APR 14 2015

OFFSHORE WATERS FORECAST FOR THE BERING SEA

WIND FORECASTS REFLECT THE PREDOMINANT SPEED AND DIRECTION
EXPECTED. SEA FORECASTS REPRESENT AN AVERAGE OF THE HIGHEST
ONE-THIRD OF THE COMBINED WIND WAVE AND SWELL HEIGHT.

PKZ499-150115-
306 AM AKDT TUE APR 14 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 976 MB LOW NEAR 51N 162W WILL MOVE INTO THE GULF OF ALASKA TUE
NIGHT. A 988 MB LOW NEAR 48N 175E WED AFTERNOON WILL MOVE TO 48N
176W AT 987 MB LATE WED NIGHT.

$$

PKZ411-150115-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
306 AM AKDT TUE APR 14 2015

.TODAY...NW WIND UP TO 20 KT BECOMING W IN THE AFTERNOON. SEAS 4
TO 7 FT. FREEZING SPRAY IN THE MORNING N OF 56N.
.TONIGHT...SW WIND 10 TO 15 KT. SEAS 5 FT.
.WED...S WIND 10 TO 15 KT. SEAS 3 TO 6 FT.
.WED NIGHT...NE WIND UP TO 20 KT. SEAS 3 TO 8 FT.
.THU THROUGH FRI...N WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.SAT...NW WIND 25 KT. SEAS 7 TO 11 FT.

$$

PKZ412-150115-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
306 AM AKDT TUE APR 14 2015

...HEAVY FREEZING SPRAY WARNING TODAY...

.TODAY...N WIND 10 TO 25 KT. SEAS 3 TO 7 FT. HEAVY FREEZING
SPRAY NEAR THE ICE EDGE.
.TONIGHT...W WIND 10 TO 20 KT. SEAS 4 FT. FREEZING SPRAY EAST OF
175W.
.WED...SW WIND 10 TO 15 KT. SEAS 4 FT. FREEZING SPRAY EAST OF
175W .
.WED NIGHT...SE WIND UP TO 20 KT. SEAS 3 TO 5 FT.
.THU...E WIND 15 TO 30 KT. SEAS 3 TO 8 FT.
.FRI...NE WIND 20 TO 35 KT. SEAS 7 TO 12 FT.
.SAT...NW WIND 30 KT. SEAS 6 TO 11 FT.

$$

PKZ413-150115-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
306 AM AKDT TUE APR 14 2015

.TODAY...N WIND 15 TO 30 KT. SEAS 5 TO 10 FT. FREEZING SPRAY.
.TONIGHT...N TO W WIND 10 TO 20 KT. SEAS 5 TO 8 FT. FREEZING
SPRAY.
.WED...S WIND 10 TO 15 KT. SEAS 6 FT.
.WED NIGHT...SE WIND 10 TO 25 KT. SEAS 5 FT.
.THU...E WIND 20 TO 35 KT. SEAS 6 TO 11 FT.
.FRI...N WIND 25 TO 35 KT. SEAS 11 TO 16 FT.
.SAT...NW WIND 25 TO 35 KT. SEAS 11 TO 15 FT.

$$

PKZ414-150115-
BERING SEA OFFSHORE EAST OF 171W-
306 AM AKDT TUE APR 14 2015

...GALE WARNING TONIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH WEDNESDAY...

.TODAY...N WIND 30 KT. SEAS 5 TO 10 FT. SNOW SHOWERS. HEAVY
FREEZING SPRAY N OF 56N.
.TONIGHT...N WIND 20 TO 35 KT. SEAS 5 TO 10 FT. HEAVY FREEZING
SPRAY N OF 57N.
.WED...NW WIND 15 TO 30 KT. SEAS 3 TO 7 FT. HEAVY FREEZING SPRAY
NEAR THE ICE EDGE.
.WED NIGHT...SW WIND UP TO 20 KT. SEAS 3 TO 6 FT.
.THU THROUGH FRI...NE WIND 20 TO 35 KT. SEAS 4 TO 9 FT.
.SAT...N WIND 15 TO 30 KT. SEAS 5 TO 10 FT.

$$

234 
FZAK62 PAFC 142300
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
300 PM AKDT TUE APR 14 2015

OFFSHORE WATERS FORECAST FOR THE BERING SEA

WIND FORECASTS REFLECT THE PREDOMINANT SPEED AND DIRECTION
EXPECTED. SEA FORECASTS REPRESENT AN AVERAGE OF THE HIGHEST
ONE-THIRD OF THE COMBINED WIND WAVE AND SWELL HEIGHT.

PKZ499-151415-
300 PM AKDT TUE APR 14 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 982 MB LOW NEAR 55N 155W WILL WEAKEN TO 991 MB WED AFTERNOON IN
THE WESTERN GULF OF ALASKA. A 1004 MB LOW SOUTH OF THE KAMCHATKA
PENINSULA WILL STRENGTHEN TO 987 MB NEAR 49N 175E WED AFTERNOON.
THE LOW WILL THEN MOVE TO 50N 172W THU AFTERNOON AT 982 MB.


$$

PKZ411-151415-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
300 PM AKDT TUE APR 14 2015

.TONIGHT...SW WIND 10 TO 15 KT. SEAS 4 TO 7 FT.
.WED...S WIND 10 TO 15 KT. SEAS 3 TO 6 FT.
.WED NIGHT...VARIABLE WIND 10 KT BECOMING NE 10 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 8 FT. FREEZING SPRAY W OF 175E AFTER MIDNIGHT.
.THU...NE WIND 10 TO 25 KT. SEAS 3 TO 8 FT.
.THU NIGHT...NE WIND 15 TO 30 KT. SEAS 4 TO 9 FT.
.FRI...N WIND 15 TO 30 KT. SEAS 8 TO 13 FT.
.SAT THROUGH SUN...W WIND 10 TO 25 KT. SEAS 7 TO 12 FT.

$$

PKZ412-151415-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
300 PM AKDT TUE APR 14 2015

.TONIGHT...W WIND 10 TO 20 KT. SEAS 3 TO 6 FT. FREEZING SPRAY
E OF 176W.
.WED...SW WIND 10 TO 15 KT. SEAS 3 TO 5 FT. FREEZING SPRAY
E OF 176W.
.WED NIGHT...SE WIND 10 TO 20 KT. SEAS 4 FT. FREEZING SPRAY
E OF 176W.
.THU...E WIND 10 TO 25 KT. SEAS 3 TO 6 FT.
.THU NIGHT...E WIND 20 TO 30 KT. SEAS 5 TO 10 FT.
.FRI...NE WIND 25 TO 40 KT. SEAS 8 TO 13 FT.
.SAT THROUGH SUN...NW WIND 25 TO 40 KT. SEAS 9 TO 17 FT.

$$

PKZ413-151415-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
300 PM AKDT TUE APR 14 2015

.TONIGHT...NW WIND 10 TO 20 KT. SEAS 5 TO 8 FT. FREEZING SPRAY
E OF 176W. 
.WED...SW WIND 10 TO 15 KT. SEAS 5 FT.
.WED NIGHT...SE WIND 10 TO 20 KT. SEAS 4 TO 6 FT. PATCHY FOG.
.THU...E WIND 15 TO 30 KT. SEAS 5 TO 10 FT.
.THU NIGHT...NE WIND 20 TO 35 KT. SEAS 9 TO 14 FT.
.FRI THROUGH SAT...N WIND 25 TO 40 KT. SEAS 13 TO 21 FT.
.SUN...W WIND 20 TO 35 KT. SEAS 10 TO 18 FT.

$$

PKZ414-151415-
BERING SEA OFFSHORE EAST OF 171W-
300 PM AKDT TUE APR 14 2015

...GALE WARNING THROUGH WEDNESDAY...
...HEAVY FREEZING SPRAY WARNING THROUGH WEDNESDAY...

.TONIGHT...N WIND 20 TO 35 KT. SEAS 7 TO 11 FT. HEAVY FREEZING
SPRAY NEAR THE ICE EDGE.
.WED...NW WIND 20 TO 35 KT DIMINISHING TO 10 TO 20 KT IN THE
AFTERNOON. SEAS 5 TO 10 FT. HEAVY FREEZING SPRAY NEAR THE ICE EDGE
IN THE MORNING.
.WED NIGHT...W WIND UP TO 15 KT BECOMING SE AFTER MIDNIGHT. SEAS
4 TO 7 FT. PATCHY FOG. FREEZING SPRAY IN THE EVENING.
.THU...E WIND 15 TO 30 KT. SEAS 4 TO 8 FT.
.THU NIGHT...E WIND 25 TO 40 KT. SEAS 5 TO 10 FT.
.FRI...NE WIND 25 TO 40 KT. SEAS 6 TO 11 FT.
.SAT...N WIND 30 TO 45 KT. SEAS 8 TO 13 FT.
.SUN...NW WIND 30 TO 45 KT. SEAS 8 TO 13 FT.

$$

469 
FZAK62 PAFC 151116
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
316 AM AKDT WED APR 15 2015

OFFSHORE WATERS FORECAST FOR THE BERING SEA

WIND FORECASTS REFLECT THE PREDOMINANT SPEED AND DIRECTION
EXPECTED. SEA FORECASTS REPRESENT AN AVERAGE OF THE HIGHEST
ONE-THIRD OF THE COMBINED WIND WAVE AND SWELL HEIGHT.

PKZ499-160115-
316 AM AKDT WED APR 15 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 992 MB LOW NEAR 48N 169E WILL MOVE TO 49N 174W AT 988 MB LATE
WED NIGHT...THEN MOVE TO 49N 171W AT 980 MB LATE THU NIGHT.

$$

PKZ411-160115-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
316 AM AKDT WED APR 15 2015

.TODAY...VARIABLE WIND 10 TO 15 KT. SEAS 4 FT.
.TONIGHT...VARIABLE WIND 10 TO 20 KT. SEAS 3 TO 6 FT. SNOW.
.THU...N WIND 10 TO 25 KT. SEAS 3 TO 8 FT. SNOW.
.THU NIGHT...N WIND 15 TO 30 KT. SEAS 6 TO 10 FT.
.FRI...N WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.SAT THROUGH SUN...W WIND 10 TO 25 KT. SEAS 7 TO 12 FT.

$$

PKZ412-160115-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
316 AM AKDT WED APR 15 2015

.TODAY...SW WIND 10 TO 15 KT. SEAS 3 TO 5 FT.
.TONIGHT...SE WIND 10 TO 20 KT. SEAS 4 FT. 
.THU...SE WIND 10 TO 25 KT. SEAS 3 TO 5 FT. FREEZING SPRAY NEAR
THE ICE EDGE.
.THU NIGHT...E WIND 15 TO 30 KT. SEAS 3 TO 8 FT.
.FRI...NE WIND 25 TO 40 KT. SEAS 5 TO 10 FT.
.SAT THROUGH SUN...NW WIND 25 TO 40 KT. SEAS 7 TO 12 FT.

$$

PKZ413-160115-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
316 AM AKDT WED APR 15 2015

.TODAY...SW WIND 10 TO 15 KT. SEAS 5 FT.
.TONIGHT...SE WIND 10 TO 25 KT. SEAS 5 FT.
.THU...E WIND 15 TO 30 KT. SEAS 4 TO 9 FT.
.THU NIGHT...NE WIND 20 TO 35 KT. SEAS 8 TO 13 FT.
.FRI...NE WIND 25 TO 40 KT. SEAS 10 TO 18 FT.
.SAT...N WIND 25 TO 40 KT. SEAS 14 TO 22 FT.
.SUN...W WIND 20 TO 35 KT. SEAS 10 TO 18 FT.

$$

PKZ414-160115-
BERING SEA OFFSHORE EAST OF 171W-
316 AM AKDT WED APR 15 2015

.TODAY...NW WIND 15 TO 30 KT. SEAS 3 TO 7 FT. FREEZING SPRAY.
.TONIGHT...NW WIND UP TO 20 KT BECOMING SW UP TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 6 FT. FREEZING SPRAY E OF 166W.
.THU...E WIND 15 TO 30 KT. SEAS 3 TO 6 FT. FREEZING SPRAY.
.THU NIGHT...NE WIND 20 TO 35 KT. SEAS 6 TO 12 FT.
.FRI...NE WIND 25 TO 40 KT. SEAS 7 TO 12 FT.
.SAT...N WIND 30 TO 45 KT. SEAS 9 TO 14 FT.
.SUN...NW WIND 30 TO 45 KT. SEAS 8 TO 13 FT.

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
523 AM AKDT SUN APR 12 2015

.ANALYSIS AND UPPER LEVELS...
BROAD CYCLONIC UPPER LOW FLOW CENTERED OVER THE EASTERN BERING
SEA AND THE NORTHERN GULF CONTINUE SHOWER ACTIVITY OVER MUCH OF
THE AOR. COLD AIR ASSOCIATED WITH THE UPPER TROUGH ARE REFLECTED
IN UPPER AIR SOUNDINGS THIS MORNING. 850 MB TEMPS ACROSS THE
ANCHORAGE BOWL AND NORTH GULF WERE -5C TO -6C AND -11C TO -13C
OVER SOUTHWEST ALASKA/EASTERN BERING SEA. AS A RESULT MOST SHOWER
ACTIVITY HAS BEEN IN THE FORM OF SNOW WITH SOME MIXED TYPES OVER
THE GULF AND COASTS. COLD ADVECTION ACROSS THE EASTERN BERING SEA
PRODUCED STRONG NORTHERLY WIND FROM THE CENTRAL ALEUTIANS TO OVER
BRISTOL BAY. COLD AIR SQUEEZING THROUGH THE ALEUTIAN RANGE
PRODUCED GALE FORCE WESTERLY GAP FLOWS OVER THE WESTERN GULF.

&&

.MODEL DISCUSSION (THROUGH MONDAY)...
MODELS ARE ALL PAINTING THE SAME BASIC PICTURE OVER THE NEXT
COUPLE OF DAYS. ALL HAVE SIMILAR TIMING OF THE UPPER WAVE MOVING
SOUTH ACROSS THE EASTERN BERING TONIGHT...THE UPPER WAVE MOVING
NORTH ACROSS SOUTHCENTRAL SUN NIGHT...AND THE DEVELOPING SURFACE
LOW MOVING SOUTH OF THE CHAIN SUN/MON.

&&
.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (DAYS 1 AND 2)...

THE MAIN FORECAST CHALLENGE TODAY WILL REVOLVE AROUND A SLOW
MOVING TROUGH AXIS TRACKING FROM THE GULF INTO SOUTHCENTRAL TODAY
AND TONIGHT. CONVECTIVE SHOWERS IN THE NORTHERN GULF WILL ORGANIZE
ALONG A FRONT AS THE TROUGH AXIS LIFTS NORTH...WITH SNOW SHOWERS
IMPACTING COASTAL LOCATIONS. THE BEST CHANCES FOR HEAVIER SNOW
SHOWERS INLAND WILL BE ALONG THE KENAI PENINSULA AND TURNAGAIN
ARM...ALTHOUGH SHOWERS WILL BE POSSIBLE ACROSS ALL INLAND
LOCATIONS BY AFTERNOON...AIDED BY DIURNAL HEATING. A ROGUE
LIGHTNING STRIKE CAN NOT BE RULED OUT OVER THE KENAI PENINSULA
THIS AFTERNOON. OTHERWISE...PRESSURE RISES BEHIND THE UPPER TROUGH
WILL SUPPORT THE DEVELOPMENT OF SOUTHEAST WINDS THROUGH FAVORED
GAPS...INCLUDING TURNAGAIN ARM AND INTO PORTIONS OF ANCHORAGE BY
THE EVENING.

MONDAY WILL BE DRIER AND LESS ACTIVE AS A WEAK OFFSHORE PRESSURE
GRADIENT COMBINES WITH WEAK UPPER RIDGING ALOFT...KEEPING MOST
SHOWER ACTIVITY OVER THE MOUNTAINS. IN OTHER WORDS...MOST INLAND
LOCATIONS WILL EXPERIENCE A RATHER PLEASANT SPRING DAY.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (DAYS 1 AND 2...SUN AND
MON)...AS SNOW SHOWERS DIE DOWN ACROSS THE LOWER KUSKOKWIM VALLEY
AND THE DELTA TODAY...AN UPPER LEVEL DISTURBANCE WILL BRING SOME
MORE STEADY SNOWFALL TO LOCATIONS FROM ILIAMNA TO KING SALMON. THE
UPPER LEVEL LOW CURRENTLY CROSSING THE ALASKA PENINSULA WILL LINK
UP WITH THE FRONT OVER THE NORTHERN GULF. THE UPPER LEVELS WILL
THEN START TO TAKE ON A NEGATIVE TILT AND CREATE SOME LOWER LEVEL
CONVERGENCE ON THE LEEWARD SIDE OF THE RANGES. MODELS ARE SHOWING
A WEAK SURFACE LOW DEVELOPING JUST AFTER MIDNIGHT TONIGHT INTO
SUNDAY MORNING. THIS SHOULD MAKE FOR A RELATIVELY NARROW CORRIDOR
OF ACCUMULATION SNOW...WITH THE HIGHEST AMOUNTS NEAR THE ALEUTIAN
RANGE NEAR ILIAMNA. WEAK MID LEVEL RIDGING WILL MOVE QUICKLY INTO
THE AREA ON MONDAY AND BRING AN END TO ANY LINGERING
PRECIPITATION. IT WILL ALSO LIKELY BRING SOME PARTIALLY CLEARING
SKIES AND SOME OF THE WARMEST TEMPERATURES WE HAVE SEEN OVER THE
PAST FEW DAYS.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (DAYS 1 AND 2...SUN AND
MON)...NORTHWEST FLOW CONTINUES TO PLAGUE AREAS ACROSS THE
BERING...ESPECIALLY ON THE BERING SIDE OF THE CHAIN. THIS IS
MAKING FOR RELENTLESS SNOW SHOWERS WHICH ARE OCCASIONALLY HEAVY
ENOUGH TO BRING VISIBILITY DOWN BELOW A MILE. AS WE GO THROUGH
SUNDAY...WE SHOULD SEE THE PATTERN FINALLY BEGIN TO SHIFT AS A
FAIRLY POTENT LOW APPROACHES ATKA AND ADAK FROM THE WEST
SOUTHWEST. IN FRONT OF THIS LOW...WEAK RIDGING SHOULD CAUSE WINDS
TO SHIFT AROUND TO THE SOUTHEAST AND BRING CALMER CONDITIONS THAN
WE HAVE SEEN THE PAST FEW DAYS. BUT THEN THE FOCUS SHIFTS TO THAT
LOW AS IT SKIRTS BY JUST SOUTH OF THE CHAIN. WITH COLD AIR IN
PLACE AND ABUNDANT MOISTURE COMING UP WITH THE FRONT...SNOW WILL
START OVER THE CENTRAL ALEUTIANS LATE THIS EVENING AND SPREAD
EAST REACHING DUTCH HARBOR BY MONDAY AFTERNOON. ACCOMPANYING THE
SNOW WILL BE STRONG NORTHEAST TO EAST WINDS. THE COMBINATION WILL
LEAD TO DRIVING SNOW REDUCING VISIBILITIES TO ONE HALF MILE AT
TIMES. RIGHT NOW IT LOOKS AS IF THE LOW WILL STAY JUST FAR ENOUGH
SOUTH TO KEEP THE WORST CONDITIONS SOUTH OF THE CHAIN.

&&

.LONG TERM FORECAST (MONDAY NIGHT THROUGH SATURDAY)...

THE MEAN UPPER LEVEL TROUGH/LOW POSITION WILL BE SITUATED ACROSS
THE NORTHERN AND EASTERN BERING INCLUDING THE SOUTHWESTERN
MAINLAND AND WESTERN GULF AND EXTENDING SOUTH INTO THE NORTH
PACIFIC THROUGH MID-WEEK. AS NUMEROUS WEAK DISTURBANCES ROTATE
THROUGH...A STRONGER LOW WILL MOVE ACROSS THE NORTH PACIFIC
GRAZING THE ALEUTIANS AND ALASKA PENINSULA INTO TUESDAY...AND
THEN HELP FEED THE BASE OF THE TROUGH OVER THE WESTERN GULF
WEDNESDAY INTO THURSDAY. THE SURFACE LOW WILL WEAKEN SIGNIFICANTLY
BEFORE MOVING INLAND LATE WEDNESDAY THROUGH LATE THURSDAY.

A FOLLOWING LOW WILL MOVE ACROSS THE WESTERN AND CENTRAL ALEUTIANS
WEDNESDAY AND THURSDAY AND THEN REACH MATURATION OVER THE EASTERN
BERING BY FRIDAY. AS THE LOW MEANDERS INLAND OVER SOUTHWEST ALASKA
NEXT WEEKEND SEVERAL DISTURBANCES WILL ROTATE INTO SOUTHERN
ALASKA AND KEEP THE WEATHER QUITE ACTIVE FOR APRIL.

THERE ARE SOME IMPORTANT ASPECTS TO NOTE WITH THIS PATTERN. THE
FIRST IS THAT THE TRACK OF LOW PRESSURE SYSTEMS WILL CONTINUE TO
KEEP COLD AIR CLOSE TO SOUTHERN ALASKA. THE NEXT IS THAT MODELS
SEEM TO BE IN AGREEMENT THAT THE INDIVIDUAL DISTURBANCES ROTATING
AROUND THE UPPER LOW(S) WILL BE FAIRLY STRONG AND BE ACCOMPANIED
BY ACTIVE JET STREAKS. WHAT THIS ALL MEANS IS THAT WE CAN NOT RULE
OUT THE POTENTIAL FOR A SIGNIFICANT SNOW/RAIN EVENT FOR SOUTHERN
ALASKA IN THE LATE-WEEK TO EARLY WEEKEND PERIOD.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...GALES 155 170 172-178
         HEAVY FREEZING SPRAY 180
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...JA
SOUTHCENTRAL ALASKA...JA
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...MO
LONG TERM...CC