Gale Warning 637, NWS Anchorage, AK

540 
FZAK62 PAFC 232315
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT TUE OCT 23 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.

PKZ499-241500-
400 PM AKDT TUE OCT 23 2012
.SYNOPSIS FOR CENTRAL BERING SEA...
A 989 MB LOW NEAR 49N 178W WILL DRIFT SOUTH AND DISSIPATE BY
WEDNESDAY AFTERNOON. HIGH PRESSURE WILL BUILD ACROSS THE BERING SEA
THROUGH THURSDAY.
$$

PKZ411-241500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT TUE OCT 23 2012

...GALE WARNING TONIGHT...

.TONIGHT...N OF 56N...SE WIND 35 KT. SEAS 20 FT. S OF 56N...E WIND 
25 KT. SEAS 15 FT. PATCHY FOG. 
.WED...SE WIND 25 KT. SEAS 15 FT. PATCHY FOG. 
.WED NIGHT...SE WIND 30 KT. SEAS 12 FT. 
.THU...SE WIND 25 KT. SEAS 11 FT. 
.THU NIGHT...SE WIND 15 KT. SEAS 10 FT. 
.FRI AND SAT...E WIND 15 KT. SEAS 8 FT. 
.SUN...NE WIND 20 KT. SEAS 6 FT.  

$$

PKZ412-241500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT TUE OCT 23 2012

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 40 KT DIMINISHING TO 30 KT TOWARDS MORNING. SEAS 21
FT SUBSIDING TO 17 FT. PATCHY FOG. RAIN.
.WED...E WIND 25 KT. SEAS 15 FT. PATCHY FOG. 
.WED NIGHT...E WIND 20 KT. SEAS 10 FT. 
.THU...E WIND 15 KT. SEAS 7 FT. 
.THU NIGHT...SE WIND 15 KT. SEAS 7 FT. 
.FRI...E WIND 20 KT. SEAS 7 FT. 
.SAT...NE WIND 15 KT. SEAS 7 FT.
.SUN...N WIND 20 KT. SEAS 6 FT.  

$$

PKZ413-241500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT TUE OCT 23 2012

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 40 KT. SEAS 20 FT. AREAS OF FOG. RAIN.
.WED...E WIND 30 KT. SEAS 15 FT. PATCHY FOG. 
.WED NIGHT...E WIND 20 KT. SEAS 10 FT. 
.THU...E WIND 20 KT. SEAS 8 FT. 
.THU NIGHT...E WIND 15 KT. SEAS 7 FT. 
.FRI...E WIND 20 KT. SEAS 7 FT. 
.SAT...NE WIND 20 KT. SEAS 9 FT.
.SUN...N WIND 20 KT. SEAS 7 FT.  

$$

PKZ414-241500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT TUE OCT 23 2012

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 40 KT DIMINISHING TO 30 KT TOWARDS MORNING. SEAS
13 FT. 
.WED...E WIND 25 KT. SEAS 9 FT. 
.WED NIGHT...NE WIND 20 KT. SEAS 6 FT. 
.THU...NE WIND 20 KT. SEAS 5 FT. 
.THU NIGHT...E WIND 20 KT. SEAS 5 FT. 
.FRI AND SAT...NE WIND 25 KT. SEAS 8 FT. 
.SUN...N WIND 25 KT. SEAS 7 FT.  

$$

JM

105 
FZAK62 PAFC 241123
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT WED OCT 24 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.

PKZ499-250300-
400 AM AKDT WED OCT 24 2012
.SYNOPSIS FOR CENTRAL BERING SEA...

A 990 MB LOW NEAR 47N 164W WILL REMAIN NEARLY STATIONARY AND
INTENSIFY TO 981 MB BY LATE THU NIGHT WITH HIGH PRESSURE BUILDING
ACROSS THE BERING SEA.

$$

PKZ411-250300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT WED OCT 24 2012

.TODAY...SE WIND 25 KT. SEAS 15 FT. PATCHY FOG. 
.TONIGHT...SE WIND 25 KT. SEAS 12 FT. PATCHY FOG. 
.THU...SE WIND 15 TO 25 KT. SEAS 10 FT. 
.THU NIGHT...SE WIND 15 KT. SEAS 9 FT. 
.FRI...E WIND 15 KT. SEAS 8 FT. 
.SAT AND SUN...NE WIND 20 KT. SEAS 6 FT.  

$$

PKZ412-250300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT WED OCT 24 2012

.TODAY...E WIND 30 KT DIMINISHING TO 20 KT IN THE AFTERNOON. SEAS 15
FT SUBSIDING TO 10 FT. PATCHY FOG.
.TONIGHT...E WIND 20 KT. SEAS 10 FT. 
.THU AND THU NIGHT...E WIND 15 KT. SEAS 6 FT. 
.FRI AND SAT...E WIND 20 KT. SEAS 7 FT. 
.SUN...NE WIND 15 KT. SEAS 6 FT.  

$$

PKZ413-250300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT WED OCT 24 2012

.TODAY...E WIND 30 KT DIMINISHING TO 20 KT IN THE AFTERNOON. SEAS 15
FT SUBSIDING TO 11 FT. PATCHY FOG. 
.TONIGHT...E WIND 20 KT. SEAS 10 FT. 
.THU...E WIND 15 KT. SEAS 8 FT. 
.THU NIGHT THROUGH SAT...NE WIND 20 KT. SEAS 8 FT.
.SUN...NE WIND 15 KT. SEAS 6 FT.  

$$

PKZ414-250300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT WED OCT 24 2012

.TODAY...E WIND 25 KT. SEAS 9 FT. 
.TONIGHT THROUGH THU NIGHT...E WIND 20 KT. SEAS 6 FT. 
.FRI THROUGH SAT...NE WIND 25 KT. SEAS 8 FT. 
.SUN...NE WIND 20 KT. SEAS 6 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
200 PM AKDT MON OCT 22 2012

.ANALYSIS AND UPPER LEVELS...
THE STRONG PERSISTENT SURFACE AND UPPER LEVEL RIDGE OF HIGH PRESSURE
CONTINUES TO HOLD THE LOW SOUTH OF THE ALEUTIANS LEAVING THE MAJORITY
OF TH SOUTHERN MAINLAND HIGH AND DRY. THE EXCEPTION IS OVER SOUTHWEST
ALASKA WHERE AN UPPER LEVEL DISTURBANCE IS PRODUCING SOME CLOUDS AND
SNOW OVER THE LOWER KUSKOKWIM VALLEY AND BRISTOL BAY. THE ONSHORE
FLOW OVER THE KUSKOKWIM DELTA IS SPREADING LOW CLOUDS AND FOG ACROSS
THAT REGION UNDER THE STABLE HIGH PRESSURE. OFFSHORE GAP WINDS ARE
RAMPING BACK UP ACROSS PRINCE WILLIAM SOUND AND THE NORTH GULF COAST.

.MODEL DISCUSSION...
THE MODELS ARE IN EXCELLENT AGREEMENT THROUGH FRIDAY. THERE IS A
MINOR DIFFERENCE IN THE HANDLING OF THE LOW APPROACHING THE CENTRAL
ALEUTIANS TUE THOUGH THAT DIFFERENCE DOES NOT EQUATE TO MUCH
DIFFERENCE IN THE WIND OR PRECIPITATION EXPECTED.

.SHORT TERM FORECAST...

SOUTHCENTRAL...
THE MAIN ISSUE OVER SOUTH CENTRAL ALASKA WILL BE THE MAGNITUDE OF THE
GAP WINDS. UPPER SUPPORT FOR STRONG WIND DOES EXIST THOUGH NOT AS
STRONG ANS THE PAST EVENT SATURDAY. WE STILL EXPECT STRONG WIND
HEADLINE LEVEL WIND FOR THE MAT-SU AND NORTHERN PRINCE WILLIAM SOUND
AND THE COPPER RIVER DELTA BEGINNING TONIGHT THROUGH TUE NIGHT. ALONG
WITH THESE WINDY CONDITIONS EXPECT THE COLD TEMPERATURES TO PERSIST
INTO MID WEEK AND THEN GRADUALLY WARM TOWARD THE END OF THE WEEK.

SOUTHWEST ALASKA/BERING SEA AND ALEUTIANS...
THE FRONT HAS ALL BUT DISSIPATED TODAY OVER THE LOWER KUSKOKWIM
VALLEY AND BRISTOL BAY. THE ASSOCIATED SNOW SHOWERS AND CLOUDS WILL
CONTINUE TO DIMINISH. THE HIGH PRESSURE OVER THE EASTERN BERING SEA
WILL PUSH INLAND. CLOUD COVER SHOULD DIMINISH OVER MOST OF THE AREA
THOUGH EXPECT LOW CLOUDS AND FOG TO PERSIST IN MANY OF THE VALLEYS
AND LOW LYING AREAS UNDER THE STABLE HIGH PRESSURE INFLUENCE.
THE LOW NOW JUST SOUTH OF THE WESTERN ALEUTIANS IS SPREADING RAIN AND
WINDY CONDITIONS ACROSS THAT REGION. THE STRONG WIND AND RAIN WILL
SPREAD TO THE CENTRAL ALEUTIANS THROUGH TONIGHT. THE HIGH PRESSURE
OVER THE EASTERN BERING SEA WILL SLOW THE EASTWARD PROGRESSION OF THE
FRONT ASSOCIATED WITH THIS LOW. ANOTHER LOW WILL FORM ALONG THE FRONT
AND BECOME THE MAIN LOW CENTER TUE NIGHT WELL SOUTH OF THE EASTERN
ALEUTIANS. THE PRECIPITATION ASSOCIATED WITH THIS FRONT WILL NOT
LIKELY SPREAD TO THE EASTERN ALEUTIANS OR THE PRIBILOF ISLANDS.

.LONG TERM FORECAST...
THE OMEGA BLOCK PATTERN WILL CONTINUE THROUGH THE WEEK. EXPECT
CONDITIONS TO REMAIN PRETTY MUCH THE SAME INTO THE END OF THE WEEK
FOR ALL AREAS.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...STORM 172 185 412 413
         GALE 127 170 171 175 176 179 411 414
FIRE WEATHER...NONE

SAM