Gale Warning 531, NWS Anchorage, AK

195 
FZAK62 PAFC 272255
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU AUG 27 2009

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.

PKZ499-281400-
400 PM AKDT THU AUG 27 2009
.SYNOPSIS FOR CENTRAL BERING SEA...

A 980 MB LOW NEAR 51N 162W WILL WEAKEN AS IT MOVES EASTWARD 
AWAY FROM THE REGION THU NIGHT AND FRI. A RIDGE OF HIGH PRESSURE 
OVER THE WESTERN BERING WILL GRADUALLY BUILD EASTWARD OVER 
THE EASTERN BERING THROUGH SAT.

$$

PKZ411-281400-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT THU AUG 27 2009

.TONIGHT...SW WIND 20 KT. SEAS 8 FT. PATCHY FOG. 
.FRI THROUGH SAT...SW WIND 20 KT. SEAS 7 FT. PATCHY FOG. 
.SAT NIGHT...S WIND 30 KT. SEAS 9 FT. 
.SUN...SW WIND 35 KT. SEAS 14 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...W WIND 20 KT. SEAS 10 FT.  

$$

PKZ412-281400-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT THU AUG 27 2009

.TONIGHT...NW WIND 15 TO 25 KT. SEAS 6 TO 11 FT. 
.FRI THROUGH SAT...W WIND 20 KT. SEAS 6 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 25 KT. SEAS 7 FT. 
.SUN...SW WIND 35 KT. SEAS 15 FT. 
.MON...SW WIND 30 KT. SEAS 15 FT. 
.TUE...SW WIND 20 KT. SEAS 12 FT.  

$$

PKZ413-281400-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT THU AUG 27 2009

.TONIGHT...NW WIND 30 TO 40 KT DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT. SEAS 12 TO 16 FT. 
.FRI...NW WIND 20 KT. SEAS 8 FT. PATCHY FOG. 
.FRI NIGHT AND SAT...W WIND 15 KT. SEAS 5 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 25 KT. SEAS 5 FT. 
.SUN...SW WIND 35 KT. SEAS 12 FT. 
.MON...SW WIND 30 KT. SEAS 14 FT. 
.TUE...SW WIND 25 KT. SEAS 11 FT.  

$$

PKZ414-281400-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT THU AUG 27 2009

...GALE WARNING TONIGHT...

.TONIGHT...N WIND 30 TO 40 KT DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT. SEAS 13 TO 16 FT. 
.FRI...N WIND 30 KT. SEAS 11 FT. 
.FRI NIGHT...NW WIND 25 KT. SEAS 8 FT. 
.SAT...NW WIND 20 KT. SEAS 6 FT. 
.SAT NIGHT...W WIND 20 KT. SEAS 5 FT. 
.SUN...SW WIND 30 KT. SEAS 8 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...SW WIND 25 KT. SEAS 12 FT.  

$$

000 
FZAK62 PAFC 281132
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT FRI AUG 28 2009

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.

PKZ499-290200-
400 AM AKDT FRI AUG 28 2009
.SYNOPSIS FOR CENTRAL BERING SEA...

A RIDGE OF HIGH PRESSURE CENTERED OVER THE WESTERN ALEUTIANS 
MIGRATES EASTWARD THROUGH THE WEEKEND. A WEATHER FRONT ASSOCIATED
WITH A LOW OVER THE CHUKCHI PENINSULA MOVES ENTERS THE WESTERN 
BERING SAT NIGHT.

$$

PKZ411-290200-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT FRI AUG 28 2009

.TODAY...SW WIND 20 KT. SEAS 7 FT. PATCHY FOG. 
.TONIGHT...SW WIND 20 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...S WIND 25 KT. SEAS 6 FT. PATCHY FOG. 
.SAT NIGHT...S WIND 35 KT. SEAS 11 FT. 
.SUN...SW WIND 35 KT. SEAS 14 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...NW WIND 15 KT. SEAS 8 FT.  

$$

PKZ412-290200-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT FRI AUG 28 2009

.TODAY...W WIND 20 KT. SEAS 7 FT. PATCHY FOG. 
.TONIGHT...W WIND 20 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...W WIND 20 KT. SEAS 6 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 25 KT. SEAS 7 FT. 
.SUN...SW WIND 35 KT. SEAS 14 FT. 
.MON...SW WIND 30 KT. SEAS 16 FT. 
.TUE...W WIND 20 KT. SEAS 11 FT.  

$$

PKZ413-290200-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT FRI AUG 28 2009

.TODAY...W WIND 20 KT. SEAS 8 FT. PATCHY FOG. 
.TONIGHT...W WIND 15 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...W WIND 15 KT. SEAS 4 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 25 KT. SEAS 6 FT. 
.SUN...SW WIND 35 KT. SEAS 12 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...W WIND 20 KT. SEAS 9 FT.  

$$

PKZ414-290200-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT FRI AUG 28 2009

...GALE WARNING TODAY...

.TODAY...NW WIND 35 KT DIMINISHING TO 25 KT BY MIDDAY. SEAS 11 FT. 
.TONIGHT...NW WIND 25 KT. SEAS 8 FT. 
.SAT...NW WIND 20 KT. SEAS 6 FT. 
.SAT NIGHT...W WIND 20 KT. SEAS 6 FT. 
.SUN...SW WIND 30 KT. SEAS 9 FT. 
.MON...SW WIND 30 KT. SEAS 14 FT. 
.TUE...SW WIND 25 KT. SEAS 12 FT.  

$$

000 
FZAK62 PAFC 282323
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT FRI AUG 28 2009

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.

PKZ499-291400-
400 PM AKDT FRI AUG 28 2009
.SYNOPSIS FOR CENTRAL BERING SEA...
A RIDGE OF HIGH PRESSURE CENTERED OVER THE WESTERN ALEUTIANS 
WILL MOVE EAST THROUGH THE WEEKEND. A WEATHER FRONT ASSOCIATED
WITH A LOW OVER THE CHUKCHI PENINSULA ENTERS THE WESTERN BERING SAT
NIGHT.
$$

PKZ411-291400-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT FRI AUG 28 2009

...GALE WARNING SATURDAY NIGHT...

.TONIGHT...SW WIND 15 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...S WIND 25 KT. SEAS 8 FT. AREAS OF FOG. 
.SAT NIGHT...S WIND 30 KT INCREASING TO 40 KT AFTER MIDNIGHT. SEAS 10
FT BUILDING TO 15 FT. AREAS OF FOG. 
.SUN...SW WIND 40 KT. SEAS 17 FT. 
.SUN NIGHT...SW WIND 30 KT. SEAS 15 FT. 
.MON...SW WIND 25 KT. SEAS 12 FT. 
.TUE...NW WIND 15 KT. SEAS 9 FT. 
.WED...W WIND 20 KT. SEAS 7 FT.  

$$

PKZ412-291400-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT FRI AUG 28 2009

...GALE WARNING SATURDAY NIGHT...

.TONIGHT...W WIND 15 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...W WIND 20 KT. SEAS 6 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 25 KT...EXCEPT INCREASING TO 35 KT WEST OF 176 W
AFTER MIDNIGHT.  SEAS 10 TO 14 FT. AREAS OF FOG. 
.SUN...SW WIND 40 KT. SEAS 17 FT. 
.SUN NIGHT...SW WIND 35 KT. SEAS 15 FT. 
.MON...SW WIND 25 KT. SEAS 12 FT. 
.TUE AND WED...W WIND 20 KT. SEAS 9 FT. 

$$

PKZ413-291400-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT FRI AUG 28 2009

.TONIGHT...W WIND 15 KT. SEAS 6 FT. PATCHY FOG. 
.SAT...W WIND 15 KT. SEAS 4 FT. PATCHY FOG. 
.SAT NIGHT...SW WIND 20 KT. SEAS 8 FT. AREAS OF FOG. 
.SUN AND SUN NIGHT...SW WIND 35 KT. SEAS 11 TO 15 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...W WIND 20 KT. SEAS 9 FT. 
.WED...W WIND 15 KT. SEAS 6 FT.  

$$

PKZ414-291400-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT FRI AUG 28 2009

.TONIGHT...NW WIND 25 KT. SEAS 8 FT. 
.SAT...NW WIND 25 KT. SEAS 8 FT. PATCHY FOG. 
.SAT NIGHT...W WIND 20 KT. SEAS 7 FT. AREAS OF FOG. 
.SUN...SW WIND 30 KT. SEAS 10 FT. 
.SUN NIGHT...SW WIND 35 KT. SEAS 12 FT. 
.MON...SW WIND 30 KT. SEAS 13 FT. 
.TUE...SW WIND 20 KT. SEAS 11 FT. 
.WED...W WIND 15 KT. SEAS 7 FT.  

$$

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
200 PM AKDT WED AUG 26 2009

.ANALYSIS AND UPPER LEVELS...
ALOFT...A SOMEWHAT COMPLICATED PATTERN IS IN PLACE ACROSS ALASKA THIS
AFTERNOON. A VERTICALLY STACKED CLOSED LOW IS IN THE CENTRAL
BERING...WITH ANOTHER CLOSED LOW SOUTH OF THE GULF OF AK. SHORTWAVE
RIDGING IS OVER SOUTHWEST AK...WITH A DEFORMATION ZONE OVER
SOUTHCENTRAL. A NARROW AND WEAKENING TROUGH AXIS IS ALSO OVER
SOUTHCENTRAL AK THIS AFTERNOON. RIDGING IS BEGINNING TO BUILD OVER
THE WESTERN BERING AND ALEUTIANS.

AT THE SURFACE...A BROAD LOW COMPLEX IS SOUTH OF THE GULF OF AK. THE
MOST PRONOUNCED LOW IS CURRENTLY SOUTH OF 50TH PARALLEL. MOISTURE
ASSOCIATED WITH THIS COMPLEX IS KEEPING RAIN AND SHOWERS ACROSS
COASTAL PORTIONS OF SOUTHCENTRAL. THE REMNANTS OF TYPHOON VAMCO ARE
NORTH OF THE CENTRAL ALEUTIANS...BRINGING STRONG WIND AND HEAVY RAIN
TO THE BERING SEA AND ALEUTIANS. FAIR WEATHER EXISTS BETWEEN THESE
TWO SYSTEMS WITH WEAKENING HIGH PRESSURE OVER SOUTHWEST AK.

.MODEL DISCUSSION...
MODELS REMAIN IN GOOD AGREEMENT THROUGH THE START OF THE WEEKEND. THE
GENERAL PATTERN INVOLVES A LARGE LOW COMPLEX OVER THE NORTH
PACIFIC...WITH THE EMBEDDED LOW CURRENTLY SOUTH OF 50N MOVING
NORTHWESTWARD TO THE SOUTHERN TIP OF KODIAK ISLAND BY FRIDAY. THE
REMNANTS OF TYPHOON VAMCO WILL CROSS THE CENTRAL ALEUTIANS THURSDAY
AND BE ABSORBED INTO THE LOW COMPLEX ON FRIDAY. ELSEWHERE...HIGH
PRESSURE WILL BUILD OVER THE WESTERN ALEUTIANS THROUGH THE END OF THE
WEEK. THE GFS WAS USED TO CONSTRUCT THE AFTERNOON FORECAST PACKAGE.

.SHORT TERM FORECAST...
.SOUTHCENTRAL...
ACTIVE WEATHER WILL CONTINUE THROUGH THE END OF THE WEEK ACROSS
SOUTHCENTRAL AS THE LOW COMPLEX AFFECTS THE AREA. THE AFOREMENTIONED
DEFORMATION ZONE AND WEAKENING TROUGH OVER THE AREA WILL CONTINUE TO
RESULT IN LIGHT RAIN AND SHOWERS TAPERING OFF THROUGH TONIGHT. GOOD
ONSHORE FLOW AND A SURFACE LOW MOVING NORTHWESTWARD INTO THE GULF
WILL BRING UNSETTLED WEATHER AGAIN TOMORROW AND FRIDAY. PRIMARY
CONCERNS REVOLVE AROUND POTENTIALLY HEAVY RAIN ALONG EASTERN KENAI
PENINSULA AND PRINCE WILLIAM SOUND...AS WELL AS A STRENGTHENING
BARRIER JET ALONG THE COAST. WINDS UP TO STORM FORCE ARE
EXPECTED...WITH WIDESPREAD GALES ALONG COASTAL WATERS.

.SOUTHWEST...
CONDITIONS WILL REMAIN QUIET ACROSS MOST OF SOUTHWEST THROUGH THE END
OF THE WEEK AS THE MAJOR WEATHER FEATURES REMAIN TO THE SOUTH.
MOISTURE WILL GENERALLY BE ON THE INCREASE THOUGH...WITH SHOWERS
POSSIBLE ALONG AREAS OF ENHANCED TERRAIN. THE AKPEN WILL SEE RAIN AND
SHOWERS FROM FORMER TYPHOON VAMCO AS IT MOVES INTO THE NORTH
PACIFIC...AS WELL AS FROM THE LOW MOVING TO NEAR KODIAK ISLAND ON
FRIDAY.

.BERING SEA AND ALEUTIANS...
STRONG WIND AND WIDESPREAD RAIN ASSOCIATED WITH FORMER TYPHOON VAMCO
WILL IMPACT THE EASTERN HALF OF THE ALEUTIANS AND PRIBILOFS TONIGHT
THROUGH THURSDAY AS THE LOW MOVES INTO THE NORTH PACIFIC. HIGH
PRESSURE BUILDING AS THE SYSTEM DEPARTS WILL LEAVE QUIET WEATHER FOR
THE END OF THE WEEK...EXCEPT FOR THE CHARACTERISTIC LOW CLOUDS AND
PATCHY FOG.

.LONG TERM FORECAST...
THE UPCOMING WEEKEND WILL BE CHARACTERIZED BY THE LOW COMPLEX IN THE
GULF AND HIGH PRESSURE OVER THE ALEUTIANS. THIS WILL KEEP SHOWERS AND
RAIN ACROSS SOUTHCENTRAL AK. BY THE START OF NEXT WEEK A MORE ACTIVE
PATTERN LOOKS TO SET UP ACROSS THE BERING SEA AND ALEUTIANS.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...FLOOD WATCH 141
         HIGH WIND WARNING 187
MARINE...STORM 120 130 132 172
         GALE 138 140 155 165 170 171 175
FIRE WEATHER...NONE

NRH AUG 09