Storm Warning 83, NWS Anchorage, AK

178 
FZAK62 PAFC 210053 CCA
OFFALU

OFFSHORE WATERS FORECAST...CORRECTED
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU JUN 20 2013

CORRECTED SYNOPSIS

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.

PKZ499-211500-
400 PM AKDT THU JUN 20 2013
.SYNOPSIS FOR CENTRAL BERING SEA...

A 965 MB LOW NEAR 48N 171E WILL DEEPEN TO 960 MB AT 51N 176E FRIDAY
MORNING.  IT WILL THEN MOVE TO 54N 168W AT 980 MB SAT AFTERNOON.

$$

PKZ411-211500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT THU JUN 20 2013

...STORM WARNING TONIGHT...

.TONIGHT...S OF 56N...E WIND 30 TO 40 KT INCREASING TO 50 KT AFTER 
MIDNIGHT. SEAS 12 FT BUILDING TO 16 FT. N OF 56N...E WIND 10 TO 20
KT. SEAS 6 FT. RAIN.
.FRI...NE WIND 30 TO 40 KT. S OF 56N...SEAS 17 FT. N OF 56N...SEAS 8
TO 12 FT. RAIN.
.FRI NIGHT...NE WIND 20 TO 30 KT. SEAS 14 FT. 
.SAT...N WIND 25 KT. SEAS 12 FT. 
.SAT NIGHT...NW WIND 20 KT. SEAS 9 FT. 
.SUN...W WIND 20 KT. SEAS 8 FT. 
.MON AND TUE...VARIABLE WIND 10 KT. SEAS 5 FT.   

$$

PKZ412-211500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT THU JUN 20 2013

...GALE WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...SE WIND 15 KT INCREASING TO 30 KT AFTER MIDNIGHT. SEAS
5 FT. 
.FRI...E WIND 25 TO 35 KT. SEAS 13 FT. RAIN.
.FRI NIGHT...E WIND 35 KT. SEAS 14 FT. RAIN.
.SAT...NE WIND 25 KT. SEAS 12 FT. 
.SAT NIGHT...N WIND 15 KT. SEAS 9 FT. 
.SUN...N WIND 15 KT. SEAS 7 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 4 FT. 
.TUE...VARIABLE WIND 10 KT. SEAS 4 FT.  

$$

PKZ413-211500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT THU JUN 20 2013

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...E WIND 25 KT INCREASING TO 40 KT AFTER MIDNIGHT. SEAS 12
FT. RAIN.
.FRI...E WIND 30 TO 40 KT. SEAS 13 FT. RAIN.
.FRI NIGHT...SE WIND 20 KT. SEAS 10 FT. RAIN.
.SAT...N WIND 20 KT. SEAS 10 FT. 
.SAT NIGHT...NW WIND 20 KT. SEAS 7 FT. 
.SUN...NW WIND 20 KT. SEAS 8 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 5 FT. 
.TUE...VARIABLE WIND 10 KT. SEAS 3 FT.  

$$

PKZ414-211500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT THU JUN 20 2013

...GALE WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...S WIND 15 KT BECOMING SE 25 KT AFTER MIDNIGHT. SEAS 4 FT.
.FRI...SE WIND 40 KT. SEAS 12 FT. RAIN.
.FRI NIGHT...SE WIND 40 KT DIMINISHING TO 25 KT AFTER MIDNIGHT. SEAS
12 FT. RAIN.
.SAT...SE WIND 25 KT. SEAS 10 FT. 
.SAT NIGHT...NE WIND 20 KT. SEAS 9 FT. 
.SUN...N WIND 20 KT. SEAS 7 FT. 
.MON...N WIND 15 KT. SEAS 4 FT. 
.TUE...NW WIND 15 KT. SEAS 5 FT.  

$$

487 
FZAK62 PAFC 211136
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT FRI JUN 21 2013

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 FRI JUN 21 2013
.SYNOPSIS FOR CENTRAL BERING SEA...
A 962 MB LOW NEAR 50N 174E WILL WEAKEN TO 970 MB AS IT MOVES 
TO 53N 175W TONIGHT. THIS LOW WILL THEN WEAKEN TO 987 MB AS 
IT TRACKS TO 55N 166W SAT NIGHT.
$$

PKZ411-220300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT FRI JUN 21 2013

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 30 TO 40 KT. SEAS 12 TO 17 FT. RAIN.
.TONIGHT...NE WIND 25 TO 35 KT. SEAS 15 FT. RAIN.
.SAT...N WIND 15 TO 25 KT. SEAS 13 FT. 
.SAT NIGHT...NW WIND 20 KT. SEAS 10 FT. 
.SUN...W WIND 20 KT. SEAS 8 FT. 
.MON...SW WIND 20 KT. SEAS 5 FT. 
.TUE...S WIND 20 KT. SEAS 6 FT.  

$$

PKZ412-220300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT FRI JUN 21 2013

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 30 TO 40 KT. SEAS 11 FT BUILDING TO 16 FT 
IN THE AFTERNOON. RAIN.
.TONIGHT...E WIND 30 TO 40 KT DIMINISHING TO 20 TO 30 KT 
AFTER MIDNIGHT. SEAS 15 FT. RAIN.
.SAT...E WIND 10 TO 20 KT. SEAS 12 FT. 
.SAT NIGHT...N WIND 15 KT. SEAS 10 FT. 
.SUN...N WIND 15 KT. SEAS 7 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 4 FT. 
.TUE...SW WIND 15 KT. SEAS 4 FT.  

$$

PKZ413-220300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT FRI JUN 21 2013

...GALE WARNING TODAY...

.TODAY...SE WIND 40 KT DIMINISHING TO 20 TO 30 KT IN THE AFTERNOON.
SEAS 12 TO 15 FT. RAIN.
.TONIGHT...SE WIND 15 TO 25 KT...BECOMING N 10 TO 20 KT W OF 176W.
SEAS 11 FT. 
.SAT...N WIND 10 TO 20 KT EXCEPT VARIABLE 10 KT E OF 174W. 
SEAS 12 FT. 
.SAT NIGHT...NW WIND 20 KT. SEAS 9 FT. 
.SUN...NW WIND 25 KT. SEAS 9 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 5 FT. 
.TUE...S WIND 15 KT. SEAS 4 FT.  

$$

PKZ414-220300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT FRI JUN 21 2013

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE WIND 30 TO 40 KT. SEAS 8 TO 13 FT. RAIN.
.TONIGHT...SE WIND 30 TO 40 KT EXCEPT S 20 TO 30 KT S OF 56N. 
SEAS 10 TO 14 FT. RAIN.
.SAT...SE WIND 15 TO 25 KT. SEAS 11 FT. 
.SAT NIGHT...E WIND 20 KT. SEAS 10 FT. 
.SUN...N WIND 20 KT. SEAS 7 FT. 
.MON AND TUE...NW WIND 15 KT. SEAS 5 FT. 

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU JUN 20 2013

.ANALYSIS AND UPPER LEVELS...THE UPPER LEVEL PATTERN HAS BECOME A
LITTLE MORE COMPLEX TODAY AS THE RIDGE HAS RECEDED INTO WESTERN
CANADA AND AN UPPER LEVEL LOW IS DIGGING JUST EAST OF THE KAMCHATKA
PENINSULA. IN BETWEEN THESE FEATURES THERE IS A HIGH AMPLITUDE RIDGE
AND THEN A WEAKENING UPPER LEVEL LOW OVER THE SOUTHWEST ALASKA COAST.
A STRONG JET STREAM IS RUNNING JUST SOUTH OF THE KAMCHATKA LOW AND IS
PERFECTLY POSITIONED TO FURTHER INTENSIFY AN EXTRA TROPICAL SURFACE
LOW THAT IS APPROACHING THE ALEUTIAN ISLANDS. THIS LOW WILL REACH THE
LOWER 960S MB RANGE AND WOULD BE CONSIDERED A STRONG LOW EVEN IN THE
WINTER.
A WEAKENING FRONT IS OVER SOUTHWEST ALASKA AND THE ALASKA PENINSULA
WHICH HAS ALSO TURNED THE FLOW SOUTHEAST OVER MOST OF THE MAINLAND
FORECAST AREA. THE SURFACE RIDGE IN THE GULF WILL REMAIN FOR THE NEXT
FEW DAYS AS WELL.

.MODEL DISCUSSION...THE MODELS ARE SETTLING DOWN AND SEEM TO HAVE
COME TOGETHER NICELY ON THE TRACK OF THE EXTRA TROPICAL LOW IN THE
ALEUTIANS. ONE TREND THEY ALL HAVE SHOWN OVER THE PAST DAY IS THAT
THE LOW WILL BE STRONGER AND FARTHER NORTH THAN THEY HAD BEEN
DEPICTING. THIS CHANGE MAKE A LOT OF SENSE DUE TO THE LOWS ORIGIN AND
THE EXTRA CHALLENGES THE MODELS ENCOUNTER WITH THESE SYSTEMS. THIS
WILL IMPACT THE FORECASTS IN THAT IT WILL SHIFT THE PRECIPITATION IN
THE ALEUTIANS AND BERING SEA FARTHER NORTH...BRINGING IN STORM FORCE
WINDS INTO THE WESTERN ALEUTIAN MARINE ZONES WHICH IS NOT VERY COMMON
IN JUNE.

.SHORT TERM FORECAST...CONVECTION STRONG ENOUGH TO PRODUCE
THUNDERSTORMS WILL BE LIMITED TO THE ALASKA RANGE IN THE NORTHERN
COPPER RIVER BASIN THE NEXT FEW DAYS. THERE ARE SOME SHOWERS THAT
WILL LINGER MAINLY OVER THE MOUNTAINS IN SOUTHWEST ALASKA UNTIL THE
WEATHER FRONT ASSOCIATED WITH THE ALEUTIAN STORM MOVES TO THE
SOUTHWEST ALASKA COAST FRIDAY NIGHT AN INCREASES THE WINDS AS WELL AS
THE CHANCES OF RAIN.
WIDESPREAD FOG WILL PERSIST IN THE GULF OF ALASKA REGION AS THE
SOUTHEAST GRADIENT KEEP CONDITIONS FAVORABLE FOR LOW CLOUDS AND FOG.

.LONG TERM FORECAST...THE EXTRA TROPICAL LOW WILL BE SHUNTED SOUTH OF
THE GULF OF ALASKA BY THE HIGH PRESSURE OVER THE STATE THIS WEEKEND.
THE FRONT ASSOCIATED WITH THIS LOW WILL RAPIDLY WEAKEN WHEN IT PUSHES
INTO THE HIGH PRESSURE AS IT MOVES EASTWARD. THIS WILL BRING SOME
PRECIPITATION TO THE GULF COAST AND REGION THIS WEEKEND BUT WILL
LIKELY ONLY INCREASE CLOUD COVER IN THE REST OF SOUTHWEST AND SOUTH
CENTRAL ALASKA. THE UPPER LEVEL HIGH PRESSURE WILL BUILD BACK OVER
THE STATE EARLY NEXT WEEK BRINGING WARMER AND DRIER CONDITIONS THAN
THE WEEKEND...BUT NOWHERE AS WARM AS EARLIER THIS WEEK.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE 155 160 165 170 172 175 179 180 185.
         STORM 176.
FIRE WEATHER...NONE.

JUN 13