Gale Warning 463, NWS Anchorage, AK

416 
FZAK61 PAFC 052341
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT MON AUG 5 2013

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-061500-
400 PM AKDT MON AUG 5 2013
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 988 MB LOW NEAR 52N 159W WEAKENS TO 999 MB AS IT MOVES TO 57N 156W
WED MORNING AND THEN MOVES INLAND. AN ASSOCIATED WEATHER FRONT ENTERS
THE WESTERN GULF MON NIGHT AND STALLS OVER THE CENTRAL GULF WED
AFTERNOON.

$$

PKZ351-061500-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT MON AUG 5 2013

...GALE WARNING TUESDAY AND TUESDAY NIGHT...

.TONIGHT...SE WIND 20 KT INCREASING TO 30 KT AFTER MIDNIGHT. SEAS
7 FT. PATCHY FOG. 
.TUE...SE WIND 30 TO 40 KT. SEAS 9 TO 15 FT. RAIN.
.TUE NIGHT...SE WIND 35 KT DIMINISHING TO 25 KT AFTER MIDNIGHT. SEAS
9 TO 14 FT. RAIN.
.WED...S WIND 20 KT. SEAS 10 FT. 
.WED NIGHT...S WIND 15 KT. SEAS 8 FT. 
.THU THROUGH SAT...SE WIND 20 KT. SEAS 7 FT.

$$

PKZ352-061500-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT MON AUG 5 2013

...GALE WARNING THROUGH TUESDAY NIGHT...

.TONIGHT...SE WIND 25 KT INCREASING TO 40 KT BY MIDNIGHT. SEAS 8 TO
15 FT. PATCHY FOG. RAIN.
.TUE...SE WIND 30 TO 40 KT. SEAS 11 TO 16 FT. RAIN.
.TUE NIGHT...SE WIND 35 KT BECOMING S 25 KT AFTER MIDNIGHT. SEAS
11 TO 15 FT. 
.WED...S WIND 20 KT. SEAS 10 FT. 
.WED NIGHT...S WIND 25 KT. SEAS 9 FT. 
.THU THROUGH SAT...S WIND 20 KT. SEAS 8 FT.   

$$

622 
FZAK61 PAFC 061118
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT TUE AUG 6 2013

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-070300-
400 AM AKDT TUE AUG 6 2013
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 983 MB LOW NEAR 53N 157W WILL WEAKEN TO 991 MB AS IT MOVES TO 58N
161W WED MORNING. THIS LOW WILL PUSH A WEATHER FRONT IN THE WESTERN
GULF OF ALASKA TO THE NORTHERN GULF BY WED AFTERNOON AND THEN WEAKEN
THROUGH THU MORNING.

$$

PKZ351-070300-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT TUE AUG 6 2013

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE WIND 25 TO 40 KT. SEAS 12 FT. RAIN.
.TONIGHT...SE WIND 35 KT DIMINISHING TO 25 KT AFTER MIDNIGHT. 
SEAS 14 FT. RAIN.
.WED...SE WIND 20 KT. SEAS 10 FT. RAIN.
.WED NIGHT...S WIND 15 KT. SEAS 8 FT. 
.THU AND FRI...S WIND 20 KT. SEAS 8 FT.  
.SAT...SE WIND 15 KT. SEAS 8 FT. 

$$

PKZ352-070300-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF 144W
400 AM AKDT TUE AUG 6 2013

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE WIND 30 TO 40 KT. SEAS 16 FT. RAIN.
.TONIGHT...SE WIND 35 KT DIMINISHING TO 25 KT AFTER MIDNIGHT. 
SEAS 16 FT. 
.WED...S WIND 20 KT. SEAS 11 FT. 
.WED NIGHT...S WIND 20 KT. SEAS 9 FT. 
.THU AND FRI...S WIND 25 KT. SEAS 9 FT.  
.SAT...S WIND 15 KT. SEAS 8 FT.  

$$

793 
FZAK61 PAFC 062344
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT TUE AUG 6 2013

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-071500-
400 PM AKDT TUE AUG 6 2013
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 987 MB LOW NEAR 55N 157W WEAKENS TO 994 MB WED MORNING NEAR 57N
160W AND CONTINUES MOVING INTO THE EASTERN BERING SEA. A WEATHER
FRONT MOVES INLAND ALONG THE NORTHEAST GULF COAST BY THU AFTERNOON.

$$

PKZ351-071500-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT TUE AUG 6 2013

.TONIGHT...SE WIND 30 KT. SEAS 14 FT. RAIN.
.WED...SE WIND 15 TO 25 KT. SEAS 11 FT. RAIN.
.WED NIGHT...S WIND 25 KT BECOMING SW 15 KT AFTER MIDNIGHT. SEAS
8 FT. 
.THU AND THU NIGHT...S WIND 30 KT. SEAS 10 FT. 
.FRI...S WIND 25 KT. SEAS 10 FT. 
.SAT...SE WIND 15 KT. SEAS 8 FT.
.SUN...VARIABLE WIND 10 KT. SEAS 6 FT.  

$$

PKZ352-071500-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT TUE AUG 6 2013

...GALE WARNING TONIGHT...

.TONIGHT...SE WIND 25 TO 35 KT DIMINISHING TO 15 TO 25 KT AFTER
MIDNIGHT. SEAS 12 TO 16 FT. RAIN.
.WED...S WIND 20 KT. SEAS 10 FT. 
.WED NIGHT...SW WIND 20 KT. SEAS 8 FT. 
.THU AND THU NIGHT...S WIND 30 KT. SEAS 10 FT. 
.FRI...S WIND 25 KT. SEAS 10 FT. 
.SAT...S WIND 15 KT. SEAS 8 FT. 
.SUN...VARIABLE WIND 10 KT. SEAS 6 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
500 PM AKDT SUN AUG 4 2013

.ANALYSIS AND UPPER LEVELS...

MASSIVE UPPER LEVEL TROUGH EXTENDS ACROSS EASTERN RUSSIA...THE BERING
SEA...AND ALL OF ALASKA THIS AFTERNOON...WITH AN EMBEDDED LOW OVER
THE NORTHERN BERING AND A WAVE MOVING TO THE NORTH GULF COAST. UPPER
RIDGES ARE OVER KAMCHATKA AND BRITISH COLUMBIA. AT THE SURFACE...LOWS
ARE OVER THE NORTHERN BERING AND SOUTH OF THE CENTRAL ALEUTIANS.
SURFACE HIGHS ARE OVER THE EXTREME WESTERN BERING AND THE EASTERN
GULF OF ALASKA.

.MODEL DISCUSSION...

MODELS ARE IN VERY GOOD AGREEMENT. THE LOW SOUTH OF THE ALEUTIANS
WILL ROTATE PAST KODIAK ISLAND MON NIGHT THROUGH TUE NIGHT. DURING
THIS TIME THE RIDGE OVER THE GULF WILL PINCH ALONG THE GULF
COAST...CREATING SIGNIFICANT PRESSURE GRADIENTS THROUGH CHANNELED
TERRAIN IN SOUTH CENTRAL AS WELL AS SHELIKOF STRAIT. AS THE LOW
CROSSES THE AKPEN TUE NIGHT IT WILL MERGE WITH THE BERING LOW OVER
BRISTOL BAY. THIS COMBINED LOW WILL REACH THE Y-K DELTA AREA ON
THU...WEAKENING THE PRESSURE GRADIENTS ACROSS SOUTHCENTRAL.
THROUGHOUT THESE EVENTS ABUNDANT MOISTURE WILL BE OVER SOUTHWEST
ALASKA...WITH SIMILAR AMOUNTS OVER SOUTHCENTRAL. THE FORECAST
UTILIZES THE GFS IN THE WEST FOR THE SHORT TERM. IN THE EAST THE GFS
IS USED THROUGH TUE...AND THEN THE NAM IS USED FOR DETAILS IN THE
CHANNELED TERRAIN WIND FORECASTS TUE NIGHT THROUGH WED AFTERNOON.

.SHORT TERM FORECAST...

IN THE WEST...SHOWERS WILL ACCOMPANY BOTH LOWS THROUGH
MIDWEEK...ALTHOUGH SOME DRYING WILL OCCUR OVER THE WESTERN HALF OF
THE BERING AND ALEUTIANS TONIGHT AND MON AS WEAK HIGH PRESSURE
BUILDS. A THIRD LOW DIVING OUT OF KAMCHATKA WILL RETURN SHOWERS TO
THAT REGION TUE AND WED.

FOR SOUTHWEST AK...THE EASTERN FLANK OF THE BERING LOW WILL BRING
RAIN AND SHOWERS INLAND TONIGHT AND MON. BY MON NIGHT RAIN WILL BE
ASSOCIATED WITH THE LOW MOVING ACROSS THE AKPEN AND WILL PERSIST
THROUGH TUE. THESE LOWS WILL ALSO BE ASSOCIATED WITH STRONG CHANNELED
WINDS ACROSS THE ALEUTIAN RANGE...ESPECIALLY ON TUE AND WED.

SOUTH AND EAST OF THE AK RANGE...RAIN WILL BE MAINLY ALONG THE COAST
WITH SOME SHOWERS MOVING ACROSS THE COASTAL MOUNTAINS THROUGH WED.
WIND WILL DEVELOP THROUGH CHANNELED TERRAIN LATER ON TUE INTO
WED...WITH STRONG WIND FOR TURNAGAIN ARM DURING THAT PERIOD.

.LONG TERM FORECAST...

SHOWERS WILL PERSIST IN THE WEST AND OVER SOUTHWEST AK THROUGH THE
END OF THE WEEK BEFORE BEING REPLACED BY FOG BENEATH HIGH PRESSURE.
SOUTHEAST OF THE AK RANGE WILL HAVE PRECIPITATION LIMITED TO THE
NORTH GULF COAST THROUGH THE END OF THE WEEK.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...GALES 132 150 155
FIRE WEATHER...NONE

DS AUG 13