Gale Warning 318, NWS Anchorage, AK

139 
FZAK62 PAFC 211148
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT SAT APR 21 2012

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.

PKZ499-220300-
400 AM AKDT SAT APR 21 2012
.SYNOPSIS FOR CENTRAL BERING SEA...
A 993 MB LOW NEAR 50N 173E INTENSIFIES TO 982 MB SUN MORNING NEAR 53N
177W AND THEN WEAKENS TO 990 MB SUN NIGHT NEAR 54N 168W.
$$

PKZ411-220300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT SAT APR 21 2012

...GALE WARNING THROUGH SUNDAY...

.TODAY...NE WIND 40 KT. SEAS 11 FT. RAIN AND SNOW. 
.TONIGHT...NE WIND 40 KT. SEAS 17 FT. SNOW. FREEZING SPRAY.
.SUN...N WIND 40 KT. SEAS 18 FT. SNOW. FREEZING SPRAY. 
.SUN NIGHT...N WIND 40 KT. SEAS 16 FT. 
.MON...SW WIND 25 KT. SEAS 9 FT. 
.TUE...W WIND 20 KT. SEAS 7 FT. 
.WED...NW WIND 20 KT. SEAS 7 FT.  

$$

PKZ412-220300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT SAT APR 21 2012

.TODAY...SE WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. PATCHY FOG.
SNOW AND RAIN. 
.TONIGHT...E WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. SNOW AND RAIN
SHOWERS. 
.SUN...E WIND 30 KT. SEAS IN ICE FREE WATERS 8 FT. SNOW AND RAIN. 
.SUN NIGHT...NE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.MON...N WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. 
.TUE...S WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. 
.WED...SW WIND 20 KT. SEAS IN ICE FREE WATERS 6 FT.  

$$

PKZ413-220300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT SAT APR 21 2012

...GALE WARNING TODAY...

.TODAY...SE WIND 35 KT. SEAS 10 FT. RAIN AND SNOW. 
.TONIGHT...SE WIND 30 KT. SEAS 11 FT. RAIN.
.SUN...N WIND 30 KT. SEAS 10 FT. RAIN AND SNOW. 
.SUN NIGHT...N WIND 35 KT. SEAS 14 FT. 
.MON...NW WIND 25 KT. SEAS 11 FT. 
.TUE...S WIND 25 KT. SEAS 7 FT. 
.WED...W WIND 20 KT. SEAS 6 FT.  

$$

PKZ414-220300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT SAT APR 21 2012

...GALE WARNING TONIGHT AND SUNDAY...

.TODAY...S WIND 30 KT. PATCHY FOG. 
.TONIGHT...SE WIND 35 KT. SNOW AND RAIN. 
.SUN...SE WIND 35 KT. SNOW AND RAIN. 
.SUN NIGHT...SE WIND 30 KT. 
.MON...N WIND 20 KT. 
.TUE...SE WIND 15 KT. 
.WED...SE WIND 20 KT.  

$$

028 
FZAK62 PAFC 212253
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT SAT APR 21 2012

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.

PKZ499-221500-
400 PM AKDT SAT APR 21 2012
.SYNOPSIS FOR CENTRAL BERING SEA...

A 981 MB LOW AT 52N 177E MOVES TO AROUND 53N 174W SUNDAY AFTERNOON.
THE STORM SLOWLY WEAKENS TO 993 MB AND MOVES TO 54N 166W MONDAY. A
WEAK WEATHER FRONT WILL MOVE TO THE SOUTHWEST BERING MON AFTERNOON.

$$

PKZ411-221500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT SAT APR 21 2012

...GALE WARNING THROUGH SUNDAY NIGHT...

.TONIGHT...NE WIND 30 TO 40 KT. SEAS 18 FT. RAIN AND SNOW. 
.SUN...N WIND 30 TO 40 KT. SEAS 18 FT. SNOW AND RAIN. 
.SUN NIGHT...N WIND 35 KT. SEAS 16 FT. FREEZING SPRAY. 
.MON...W WIND 25 KT. SEAS 10 FT. 
.MON NIGHT...S WIND 20 KT. SEAS 5 FT. 
.TUE...W WIND 20 KT. SEAS 6 FT. 
.WED...NW WIND 20 KT. SEAS 7 FT. 
.THU...N WIND 20 KT. SEAS 6 FT.  

$$

PKZ412-221500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT SAT APR 21 2012

.TONIGHT...E WIND 30 KT. SEAS IN ICE FREE WATERS 10 FT. SNOW AND
RAIN. 
.SUN...NE WIND 25 KT. W OF 175W...N WIND 30 KT. SEAS IN ICE FREE
WATERS 10 FT. SNOW AND RAIN. 
.SUN NIGHT...NE WIND 25 KT. SEAS IN ICE FREE WATERS 9 FT. 
.MON...N WIND 15 KT TO 25 KT. SEAS IN ICE FREE WATERS 6 FT. 
.MON NIGHT...NW WIND 15 KT. SEAS IN ICE FREE WATERS 4 FT. 
.TUE...S WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. 
.WED...SW WIND 20 KT. SEAS IN ICE FREE WATERS 6 FT. 
.THU...N WIND 20 KT. SEAS IN ICE FREE WATERS 5 FT.  

$$

PKZ413-221500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT SAT APR 21 2012

.TONIGHT...SE WIND 20 KT TO 30 KT. SEAS 11 FT. RAIN AND SNOW. 
.SUN...NE WIND 30 KT. E OF 175W...S WIND 25 KT. SEAS 10 FT. RAIN AND
SNOW. 
.SUN NIGHT...N WIND 30 KT. E OF 175W...E WIND 25 KT. SEAS 10 FT. 
.MON...NW WIND 25 KT. SEAS 10 FT. 
.MON NIGHT...NW WIND 20 KT. SEAS 8 FT. 
.TUE...S WIND 25 KT. SEAS 7 FT. 
.WED...W WIND 20 KT. SEAS 6 FT. 
.THU...N WIND 30 KT. SEAS 9 FT.  

$$

PKZ414-221500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT SAT APR 21 2012

...GALE WARNING THROUGH SUNDAY...

.TONIGHT...SE WIND 30 TO 40 KT. SNOW AND RAIN. 
.SUN...SE WIND 30 TO 40 KT. SNOW AND RAIN. 
.SUN NIGHT...SE WIND 25 KT. 
.MON...NE WIND 20 KT. 
.MON NIGHT...N WIND 20 KT. 
.TUE...E WIND 15 KT. 
.WED...SE WIND 20 KT. 
.THU...E WIND 30 KT.  

$$

890 
FZAK62 PAFC 221147
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT SUN APR 22 2012

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.

PKZ499-230300-
400 AM AKDT SUN APR 22 2012
.SYNOPSIS FOR CENTRAL BERING SEA...

A 983 MB LOW NEAR 52N 179W MOVES TO 54N 169W SUN NIGHT AT 991 MB AND
THEN TO 54N 161W AT 997 MB MON EVENING. A WEAK WEATHER FRONT WILL
MOVE TO THE SOUTHWEST BERING MON AFTERNOON.

$$

PKZ411-230300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT SUN APR 22 2012

...GALE WARNING THROUGH TONIGHT...

.TODAY...N WIND 45 KT DIMINISHING TO 35 KT IN THE AFTERNOON. SEAS 18
FT. 
.TONIGHT...N WIND 35 KT. SEAS 16 FT. FREEZING SPRAY. 
.MON...NW WIND 25 KT. SEAS 10 FT. 
.MON NIGHT...S WIND 20 KT. SEAS 6 FT. 
.TUE...W WIND 20 KT. SEAS 6 FT. 
.WED AND THU...N WIND 25 KT. SEAS 8 FT.  

$$

PKZ412-230300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT SUN APR 22 2012

.TODAY...E WIND 25 KT. SEAS IN ICE FREE WATERS 10 FT. 
.TONIGHT...NE WIND 25 KT. SEAS IN ICE FREE WATERS 9 FT. 
.MON...N WIND 20 KT. SEAS IN ICE FREE WATERS 7 FT. 
.MON NIGHT...NW WIND 15 KT. SEAS IN ICE FREE WATERS 4 FT. 
.TUE...S WIND 25 KT. SEAS IN ICE FREE WATERS 8 FT. 
.WED...E WIND 20 KT. SEAS IN ICE FREE WATERS 6 FT. 
.THU...NE WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT.  

$$

PKZ413-230300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT SUN APR 22 2012

.TODAY...SE WIND 25 KT BECOMING N IN THE AFTERNOON. SEAS 10 FT. 
.TONIGHT...N WIND 25 KT. SEAS 11 FT. 
.MON...NW WIND 25 KT. SEAS 11 FT. 
.MON NIGHT...NW WIND 20 KT. SEAS 8 FT. 
.TUE...S WIND 20 KT. SEAS 6 FT. 
.WED...E WIND 25 KT. SEAS 8 FT. 
.THU...NE WIND 30 KT. SEAS 11 FT. 

$$

PKZ414-230300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT SUN APR 22 2012

.TODAY...SE WIND 30 KT. RAIN AND SNOW. 
.TONIGHT...SE WIND 25 KT. RAIN AND SNOW. 
.MON...NE WIND 20 KT. 
.MON NIGHT...N WIND 20 KT. 
.TUE...E WIND 15 KT. 
.WED...E WIND 25 KT. 
.THU...E WIND 30 KT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT FRI APR 20 2012

.ANALYSIS AND UPPER LEVELS...THE UPPER LEVEL FLOW OVER THE MAINLAND
PART OF THE STATE IS WEAK TODAY AS THE PATTERN IS SHIFTING. THERE IS
A CUT OFF UPPER LEVEL LOW SOUTH OF THE GULF OF ALASKA AND A HIGH
AMPLITUDE UPPER LEVEL TROUGH ENTERING THE WESTERN BERING SEA. A HIGH
AMPLITUDE RIDGE IS OVER THE EASTERN ALEUTIAN ISLANDS AND ALASKA
PENINSULA BETWEEN THESE TROUGHS. THERE IS ALSO A PRONOUNCED JET
STREAM RUNNING OVER THE NORTH SIDE OF THE RIDGE INTO THE BERING SEA
THAT TURNS SHARPLY OVER BRISTOL BAY AS IT HEADS AROUND THE SOUTH SIDE
OF THE LOW THAT IS SOUTH OF THE GULF. SO EVEN THOUGH THE MAINLAND
PORTION OF THE STATE HAS LIGHT FLOW THERE ARE MUCH STRONGER UPPER
LEVEL WINDS IN THE BERING SEA WHICH WILL BE MOVING OVER THE MAINLAND
PART OF THE STATE AS THE PATTEN PROGRESSES.
AT THE SURFACE THE IS A COMPLEX LOW IN THE GULF WHICH IS EXTENDING A
TROUGH INTO THE MAINLAND PART OF THE STATE. THIS IS BRINGING
GENERALLY EAST TO NORTHEAST WINDS OVER SOUTH CENTRAL ALASKA...WHICH
TURN MORE NORTHWEST OVER SOUTHWEST ALASKA AND THE ALASKA PENINSULA.
THE STRONG SURFACE RIDGE IS STILL OVER THE CENTRAL ALEUTIANS BUT WILL
BE MOVING EASTWARD AS A LARGE LOW SOUTHWEST OF ATTU MOVES TO NEAR
KISKA TOMORROW.

.MODEL DISCUSSION...MODELS ARE DOING QUITE WELL AND EVEN THE GFS HAS
COME IN LINE WITH THE OTHER ONES IN REGARDS TO THE LARGE LOW THAT
WILL BE MOVING INTO THE BERING SEA. STILL PREFERRED THE ECMWF OVERALL
AND THE NAM WAS ALSO USED TO FILL IN DETAIL.

.SHORT TERM FORECAST...THE MAJORITY OF THE MAINLAND WILL SEE PARTLY
CLOUDY SKIES WITH A FEW AFTERNOON AND EVENING SHOWERS OVER MOUNTAINS.
THE BIG EXCEPTION WILL BE THE KUSKOKWIM DELTA WHICH WILL REMAIN UNDER
LOW STRATUS WITH SOME SNOW FLURRIES AS NORTHWEST WINDS OFF THE ICE
PACK KEEP THAT AREA CONSIDERABLE COLDER.
THE ALASKA PENINSULA WILL CONTINUE TO SEE LOW CLOUDS ALONG THE BERING
SEA COAST WHILE THE PACIFIC SIDE WILL BE MOSTLY CLEAR INTO SATURDAY.
THE LARGE LOW MOVING TOWARD THE WESTERN ALEUTIANS WILL BRING WARMER
AIR TO THE REGION THROUGH TOMORROW...THEN WINDS WILL INCREASE FROM
THE NORTH AFTER THE LOW MOVES BY. SOME AREAS OF BLOWING SNOW ARE
POSSIBLE IN THE WESTERN ALEUTIANS SATURDAY NIGHT WITH THIS SYSTEM.

.LONG TERM FORECAST...THE LARGE LOW IN THE ALEUTIANS THIS WEEKEND
WILL MOVE SOUTH OF THE GULF EARLY NEXT WEEK AS HIGH PRESSURE BUILDS
BACK INTO WESTERN AND SOUTHWEST ALASKA BY MIDWEEK. THIS WILL BRING A
GOOD BIT OF CLEARING OVER THE MAINLAND PART OF THE STATE IN THE
MIDDLE OF THE WEEK NEXT WEEK.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE 172 175 176.
FIRE WEATHER...NONE.

APR 12