Storm Warning 137, NWS Anchorage, AK

Issued

Sep 12, 2010, 4:00 PM AKDT (00:00 UTC)

Expired

Sep 13, 2010, 4:00 AM AKDT

In force

12 hr

Issued by

NWS Anchorage, AK

215 
FZAK52 PAFC 130016
CWFALU

COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
400 PM AKDT SUN SEP 12 2010

COASTAL WATERS FORECAST FOR SOUTHWEST ALASKA+BRISTOL BAY+THE
ALASKA PENINSULA WATERS AND THE ALEUTIAN ISLANDS UP TO 100 NM OUT.

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.

PKZ199-131200-
400 PM AKDT SUN SEP 12 2010
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A STRONG FRONT OVER THE CENTRAL BERING WILL DISSIPATE OVER THE
EASTERN BERING SUN NIGHT AND MON.
$$

PKZ150-131200-
COASTAL WATERS SOUTH OF THE ALASKA PENINSULA SITKINAK TO CASTLE
CAPE
400 PM AKDT SUN SEP 12 2010

.TONIGHT...VARIABLE WIND TO 15 KT. SEAS 3 FT. PATCHY FOG. 
.MON AND MON NIGHT...VARIABLE WIND TO 15 KT. SEAS 3 FT. PATCHY FOG. 
.TUE...VARIABLE WIND TO 15 KT. SEAS 3 FT. 
.TUE NIGHT AND WED...VARIABLE WIND 10 KT. SEAS 3 FT. 
.THU AND FRI...VARIABLE WIND 10 KT. SEAS 5 FT. 
$$

PKZ155-131200-
COASTAL WATERS SOUTH OF THE ALASKA PENINSULA CASTLE CAPE TO CAPE
SARICHEF
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SE WIND 30 KT EXCEPT S 15 KT FROM THE SHUMAGIN ISLANDS E.
SEAS 7 FT. PATCHY FOG. 
.MON...SE WIND 30 KT EXCEPT SE 20 KT FROM THE SHUMAGIN ISLANDS E.
SEAS 8 FT. PATCHY FOG. 
.MON NIGHT...SE WIND 30 KT EXCEPT SE 20 KT FROM THE SHUMAGIN ISLANDS
E. SEAS 9 FT. PATCHY FOG. 
.TUE...SE WIND 20 KT. SEAS 8 FT. 
.TUE NIGHT...SE WIND 15 KT. SEAS 7 FT. 
.WED...S WIND 25 KT. SEAS 7 FT. 
.THU...SE WIND 25 KT. SEAS 6 FT. 
.FRI...E WIND 20 KT. SEAS 6 FT.  
$$

PKZ160-131200-
BRISTOL BAY WATERS CAPE NEWENHAM TO PORT HEIDEN
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SE WIND 25 KT...EXCEPT VARIABLE WIND 10 KT BECOMING SE
AFTER MIDNIGHT W OF 160W. SEAS 5 FT. PATCHY FOG. 
.MON AND MON NIGHT...SE WIND 25 KT...EXCEPT 15 KT E OF 160W. SEAS 6
FT. PATCHY FOG. 
.TUE...S WIND 20 KT. SEAS 4 FT. 
.TUE NIGHT...SW WIND 15 KT. SEAS 3 FT. 
.WED...SE WIND 15 KT. SEAS 4 FT. 
.THU...SE WIND 20 KT. SEAS 4 FT. 
.FRI...E WIND 10 KT. SEAS 2 FT.  
$$

PKZ165-131200-
PORT HEIDEN TO CAPE SARICHEF
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SE WIND 30 KT...EXCEPT 20 KT FROM PORT MOLLER E. HIGHER
GUSTS OUT OF BAYS AND PASSES. SEAS 8 FT. PATCHY FOG. 
.MON...SE WIND 30 KT. HIGHER GUSTS OUT OF BAYS AND PASSES. SEAS 9 FT.
PATCHY FOG. 
.MON NIGHT...SE WIND 30 KT. HIGHER GUSTS OUT OF BAYS AND PASSES. SEAS
7 FT. PATCHY FOG. RAIN.
.TUE...SE WIND 25 KT. SEAS 5 FT. 
.TUE NIGHT...SE WIND 15 KT. SEAS 4 FT. 
.WED AND THU...SE WIND 25 KT. SEAS 6 FT. 
.FRI...E WIND 15 KT. SEAS 4 FT.  
$$

PKZ180-131200-
SOUTHWEST ALASKA WATERS CAPE NEWENHAM TO DALL POINT
400 PM AKDT SUN SEP 12 2010

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SE WIND 40 KT...EXCEPT 30 KT E OF NUNIVAK ISLAND. SEAS 11
FT. PATCHY FOG. 
.MON...SE WIND 35 KT. SEAS 12 FT. PATCHY FOG. RAIN.
.MON NIGHT...S WIND 30 KT. SEAS 11 FT. PATCHY FOG. RAIN.
.TUE...S WIND 25 KT. SEAS 8 FT. 
.TUE NIGHT...S WIND 20 KT. SEAS 6 FT. 
.WED...SE WIND 20 KT. SEAS 6 FT. 
.THU...SE WIND 25 KT. SEAS 7 FT. 
.FRI...SE WIND 20 KT. SEAS 5 FT.  
$$

PKZ170-131200-
EASTERN ALEUTIANS CAPE SARICHEF TO NIKOLSKI
400 PM AKDT SUN SEP 12 2010

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE WIND 40 KT. SEAS 12 FT. PATCHY FOG. RAIN.
.MON...SE WIND 35 KT...EXCEPT BECOMING NW 15 KT W OF UNALASKA IN THE
AFTERNOON. SEAS 12 FT. PATCHY FOG. RAIN.
.MON NIGHT...N WIND 20 KT EXCEPT SE 35 KT FROM UNALASKA E. SEAS
11 FT. PATCHY FOG. RAIN.
.TUE...E WIND 25 KT. SEAS 11 FT. 
.TUE NIGHT...SE WIND 20 KT. SEAS 9 FT. 
.WED AND THU...SE WIND 30 KT. SEAS 9 FT. 
.FRI...E WIND 25 KT. SEAS 9 FT.  
$$

PKZ171-131200-
UNALASKA BAY
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY...

.TONIGHT...SE WIND 30 KT. HIGHER GUSTS OUT OF CHANNELED TERRAIN. SEAS
5 FT. PATCHY FOG. 
.MON...SE WIND 25 KT. HIGHER GUSTS OUT OF CHANNELED TERRAIN. SEAS 3
FT. PATCHY FOG. RAIN.
.MON NIGHT...SE WIND 15 KT DIMINISHING TO 10 KT AFTER MIDNIGHT. SEAS
2 FT. PATCHY FOG. RAIN.
.TUE...SE WIND 15 KT. SEAS 2 FT. 
.TUE NIGHT...SE WIND 10 KT. SEAS 2 FT. 
.WED AND THU...SE WIND 20 KT. SEAS 3 FT. 
.FRI...E WIND 15 KT. SEAS 2 FT.  
$$

PKZ172-131200-
EASTERN ALEUTIANS NIKOLSKI TO ADAK
400 PM AKDT SUN SEP 12 2010

...GALE WARNING TONIGHT...

.TONIGHT...W WIND 25 KT EXCEPT S 40 KT E OF SEGUAM ISLAND. SEAS
13 FT. PATCHY FOG. RAIN.
.MON...SW WIND TO 20 KT...EXCEPT NW TO 20 KT E OF SEGUAM ISLAND. SEAS
10 FT. PATCHY FOG. 
.MON NIGHT...SW WIND TO 20 KT...EXCEPT NW TO 20 KT E OF SEGUAM
ISLAND. SEAS 8 FT. PATCHY FOG. 
.TUE...SW WIND 20 KT. SEAS 7 FT. 
.TUE NIGHT...SE WIND 25 KT. SEAS 7 FT. 
.WED...SE WIND 35 KT. SEAS 12 FT. 
.THU...SE WIND 30 KT. SEAS 13 FT. 
.FRI...E WIND 25 KT. SEAS 13 FT.  
$$

PKZ175-131200-
WESTERN ALEUTIANS ADAK TO KISKA
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...W WIND 20 KT. SEAS 11 FT. PATCHY FOG. 
.MON AND MON NIGHT...S WIND 25 KT. SEAS 8 FT. PATCHY FOG. 
.TUE...S WIND 20 KT. SEAS 8 FT. 
.TUE NIGHT...SE WIND 40 KT. SEAS 9 FT. 
.WED...SE WIND 45 KT. SEAS 16 FT. 
.THU...NW WIND 35 KT. SEAS 14 FT. 
.FRI...N WIND 15 KT. SEAS 7 FT.  
$$

PKZ176-131200-
WESTERN ALEUTIANS KISKA TO ATTU
400 PM AKDT SUN SEP 12 2010

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SW WIND 25 KT. SEAS 9 FT. PATCHY FOG. 
.MON...SW WIND 25 KT. SEAS 9 FT. PATCHY FOG. 
.MON NIGHT...SW WIND 30 KT DIMINISHING TO 20 KT AFTER MIDNIGHT. SEAS
10 FT. PATCHY FOG. 
.TUE...S WIND 20 KT. SEAS 9 FT. 
.TUE NIGHT...E WIND 40 KT. SEAS 8 FT. 
.WED...N WIND 45 KT. SEAS 16 FT. 
.THU...NW WIND 35 KT. SEAS 13 FT. 
.FRI...VARIABLE WIND 10 KT. SEAS 6 FT.  
$$

PKZ185-131200-
ST MATTHEW ISLAND WATERS
400 PM AKDT SUN SEP 12 2010

...STORM WARNING TONIGHT...

.TONIGHT...SE WIND 50 KT. SEAS 16 FT E OF SAINT MATTHEW ISLAND...
21 FT W OF SAINT MATTHEW ISLAND. PATCHY FOG. RAIN.
.MON...E OF SAINT MATTHEW ISLAND...SE WIND 40 KT. W OF SAINT MATTHEW
ISLAND...SW WIND 30 KT DIMINISHING TO 20 KT IN THE AFTERNOON. SEAS
16 FT. PATCHY FOG. RAIN.
.MON NIGHT...S WIND 20 KT. SEAS 11 FT. PATCHY FOG. 
.TUE...S WIND 20 KT. SEAS 9 FT. 
.TUE NIGHT...S WIND 25 KT. SEAS 7 FT. 
.WED AND THU...SE WIND 25 KT. SEAS 7 FT. 
.FRI...SE WIND 20 KT. SEAS 6 FT.  
$$

PKZ179-131200-
PRIBILOF ISLANDS NEAR-SHORE WATERS
400 PM AKDT SUN SEP 12 2010

...GALE WARNING TONIGHT...

.TONIGHT...SE WIND 45 KT. SEAS 15 FT. PATCHY FOG. RAIN.
.MON...S WIND 30 KT BECOMING W 10 KT IN THE AFTERNOON. SEAS 14 FT
SUBSIDING TO 10 FT IN THE AFTERNOON. PATCHY FOG. RAIN.
.MON NIGHT...VARIABLE WIND 10 KT. SEAS 8 FT. PATCHY FOG. 
.TUE AND TUE NIGHT...VARIABLE WIND 10 KT. SEAS 6 FT. 
.WED AND THU...SE WIND 30 KT. SEAS 9 FT. 
.FRI...SE WIND 20 KT. SEAS 7 FT.  
$$

NWS Anchorage, AK wrote its last area forecast discussion before this storm warning went out at Sep 12, 12:05 PM AKDT, 3 hours 55 minutes earlier.

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
1205 PM AKDT SUN SEP 12 2010

.ANALYSIS AND UPPER LEVELS...SATELLITE IMAGERY SHOWS A STRONG
LATE SUMMER/EARLY FALL STORM RAPIDLY TRACKING NORTHWARD ACROSS
THE WESTERN BERING SEA THIS MORNING DUE TO A 100+ KT UPPER JET.
DOWNSTREAM RIDGE CONTINUES TO STRENGTHEN OVER MAINLAND ALASKA AND
CONTRIBUTE TO AN ESPECIALLY TIGHT PRESSURE GRADIENT OUT AHEAD OF
THE BERING SYSTEM. THERE IS AN ESTIMATED 400 MILE WIDE SWATH OF
GALE TO STORM FORCE WINDS ACROSS THE CENTRAL BERING AND ALEUTIANS.
SEAS ARE ALSO SIGNIFICANT WITH 18+ FEET AT BUOY 46035. WITH THE
LOW TRACKING NORTHWARD AND STRONG RIDGE TO THE EASTWARD MOVEMENT
OF THE FRONT IS VERY SLOW. MAINLAND ALASKA IS PRIMARILY CLEAR WITH
THE EXCEPTION OF A FEW AREAS OF STRATUS AND FOG...PRIMARILY ALONG
THE COAST.

.MODEL DISCUSSION...MODELS REMAIN IN EXCELLENT AGREEMENT THROUGH
THE NEXT FEW DAYS. THERE HAS BEEN A TREND TOWARD SLOWER PROGRESSION
OF THE BERING SEA FRONT AND TOWARD DISSIPATING THE FRONT FARTHER
WEST. THIS MAKES A LOT OF SENSE CONSIDERING THE STRENGTH OF THE
DOWNSTREAM RIDGE SO FORECASTS WILL BE ADJUSTED ACCORDINGLY.

.SHORT TERM FORECAST...BLOCKING RIDGE WILL MAINTAIN DRY AND (MOSTLY)
CLEAR SKIES ACROSS MAINLAND ALASKA. THE ONE EXCEPTION TO THIS WILL
BE THE PRESENCE OF AREAS OF LOW CLOUDS AND FOG ESPECIALLY ALONG
THE COAST. THE BERING SEA FRONT WILL BE STRETCHED APART ALONG THE
WEST SIDE OF THE RIDGE...DISSIPATING TONIGHT AND MONDAY OVER THE
EASTERN BERING SEA. A STRONG SHORT-WAVE DROPPING OUT OF EASTERN
ASIA WILL THEN TRIGGER DEVELOPMENT OF ANOTHER STRONG PACIFIC SURFACE
LOW WHICH IS EXPECTED TO ARRIVE AT THE WESTERN ALEUTIANS BY MID
WEEK. MODELS INDICATE THAT THIS SYSTEM WILL BECOME CUT-OFF FROM
THE FLOW AND REMAIN SOUTH OF THE ALEUTIANS. THIS WOULD THEN ALLOW
HIGH PRESSURE TO BUILD NORTH AND EAST OF THE SYSTEM OVER MUCH OF
THE BERING SEA.

.LONG TERM FORECAST...CONFIDENCE IN EXTENDED FORECAST IS ABOVE
AVERAGE WITH THE BLOCKING RIDGE EXPECTED TO HOLD OVER MAINLAND
ALASKA THROUGH THE WEEK AND INTO NEXT WEEKEND. CONFIDENCE IS
LOWER OUT WEST WITH DETAILS OF SYSTEM...BUT MODELS SHOW SAME
GENERAL IDEA. THE SYSTEM ALONG THE ALEUTIANS MID WEEK WILL
STALL WEST OF THE RIDGE AND WEAKEN. ANOTHER SYSTEM WILL THEN
DROP OUT OF ASIA AND MOVE TO THE ALEUTIANS SOMETIME NEXT WEEKEND.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...STORM WARNING 185.
         GALE WARNING...165 170 179 180.
FIRE WEATHER...NONE.

SEB SEP 10

Storm Warnings in Alaska, 2010Every storm warning in 2010

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.