Gale Warning 604, NWS Anchorage, AK

Issued

Sep 19, 2010, 4:00 PM AKDT (00:00 UTC)

Expired

Sep 20, 2010, 4:00 AM AKDT

In force

12 hr

Issued by

NWS Anchorage, AK

779 
FZAK62 PAFC 192321
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT SUN SEP 19 2010

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.

PKZ499-201200-
400 PM AKDT SUN SEP 19 2010
.SYNOPSIS FOR CENTRAL BERING SEA...

A 973 MB LOW AT 52N 176E MOVES TO 57N 177W LATE TUE MORNING AT
985 MB AND BECOMES STATIONARY AND WEAKENS THEREAFTER.

$$

PKZ411-201200-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT SUN SEP 19 2010

.TONIGHT...NE TO NW WIND 15 TO 25 KT. SEAS 12 TO 16 FT. PATCHY FOG.
RAIN SHOWERS. 
.MON...NE TO NW WIND 15 TO 25 KT. SEAS 10 TO 14 FT. PATCHY FOG. RAIN.
.MON NIGHT...N WIND 15 TO 25 KT. SEAS 7 TO 11 FT. RAIN SHOWERS. 
.TUE...NW WIND 25 KT. SEAS 11 FT. 
.TUE NIGHT...SW WIND 25 KT. SEAS 9 FT. 
.WED...SE WIND 30 KT. SEAS 10 FT. 
.THU...NW WIND 35 KT. SEAS 10 FT. 
.FRI...NW WIND 15 KT. SEAS 7 FT.  

$$

PKZ412-201200-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT SUN SEP 19 2010

...GALE WARNING MONDAY...

.TONIGHT...SE WIND 20 TO 30 KT. SEAS 6 TO 10 FT. AREAS OF FOG. RAIN.
.MON...SE WIND 25 TO 35 KT. SEAS 11 TO 15 FT. PATCHY FOG. RAIN.
.MON NIGHT...E WIND 30 KT. SEAS 13 TO 17 FT. PATCHY FOG. RAIN
SHOWERS. 
.TUE...E WIND 25 KT. SEAS 14 FT. 
.TUE NIGHT...SE WIND 20 KT. SEAS 9 FT. 
.WED...SE WIND 25 KT. SEAS 9 FT. 
.THU...NE WIND 25 KT. SEAS 7 FT.
.FRI...N WIND 20 KT. SEAS 8 FT.  

$$

PKZ413-201200-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT SUN SEP 19 2010

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S WIND 25 TO 35 KT. SEAS BUILDING TO 10 TO 14 FT. RAIN.
.MON...SE WIND 35 KT...EXCEPT W 30 KT WEST OF 176W. SEAS 12 TO 16 FT.
RAIN.
.MON NIGHT...W WIND 25 KT. SEAS 11 TO 15 FT. RAIN SHOWERS. 
.TUE...W WIND 25 KT. SEAS 11 FT. 
.TUE NIGHT...SW WIND 30 KT. SEAS 12 FT. 
.WED...S WIND 30 KT. SEAS 11 FT. 
.THU...W WIND 30 KT. SEAS 9 FT. 
.FRI...NW WIND 20 KT. SEAS 7 FT.  

$$

PKZ414-201200-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT SUN SEP 19 2010

...GALE WARNING MONDAY...

.TONIGHT...S TO E WIND 20 TO 30 KT. SEAS 8 FT. AREAS OF FOG. RAIN.
.MON...SE WIND 25 TO 35 KT. SEAS BUILDING TO 11 FT. PATCHY FOG. RAIN.
.MON NIGHT...SE WIND 15 TO 25 KT. SEAS BUILDING TO 14 FT. PATCHY FOG.
RAIN SHOWERS. 
.TUE...SE WIND 15 TO 25 KT. SEAS 12 FT. 
.TUE NIGHT...S WIND 20 KT. SEAS 9 FT. 
.WED...S WIND 20 KT. SEAS 9 FT. 
.THU...E WIND 25 KT. SEAS 8 FT. 
.FRI...N WIND 25 KT. SEAS 6 FT.  

$$

NWS Anchorage, AK wrote its last area forecast discussion before this gale warning went out at Sep 19, 1:00 PM AKDT, 3 hours earlier.

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
100 PM AKDT SUN SEP 19 2010

.MODEL DISCUSSION...GFS AND NAM IN REASONABLE AGREEMENT ON SURFACE
FEATURES THROUGH ABOUT 60 HRS AND THEN SIGNIFICANT DIVERGENCE ON
ANOTHER PACIFIC SYSTEM MOVING INTO THE WESTERN ALEUTIANS. AS PER
USUAL THE GFS IS RUNNING 3 TO 5 MB DEEPER THAN THE NAM OR OLDER ECMWF
RUN.  RIDGE OF HIGHER PRESSURE OVER GULF AND MAINLAND AT 500 MB STILL
PROGED TO MOVE INTO THE CHUKCHI SEA BY MID-WEEK WITH SEVERAL
WEAKENING FRONTS MOVING INTO THE SOUTHERN GULF.

.ANALYSIS AND UPPER LEVELS...VISIBLE SATELLITE IMAGERY SHOWS PLENTY
OF STRATUS AND FOG OVER THE WESTERN HALF OF THE GULF WITH NEAR
COMPLETE CLOUD COVER OVER THE BERING AND ALEUTIANS.  ACTIVE WEATHER
CONSISTS OF A LOW OVER THE WESTERN ALEUTIANS WITH A WEAKENING WARM
FRONT OVER THE AK PEN.

.SHORT TERM FORECAST...BERING LOW IS PROGED TO MOVE NORTH OF ATKA
MONDAY MORNING AND THEN NORTHWARD INTO THE CENTRAL BERING AS IT BUTTS
UP ALONG THE WESTERN SIDE OF THE RIDGE. MODERATELY STRONG SOUTHWEST
WINDS CAN BE EXPECTED IN THE WESTERN AND CENTRAL ALEUTIANS OVER THE
NEXT 48 HOURS.  LITTLE CHANGE EXPECTED EAST OF 160W.

.LONG TERM FORECAST...AS NOTED ALREADY THERE IS CONSIDERABLE MODEL
DIVERGENCE REGARDING ALEUTIANS ON WEDNESDAY.  GFS PRODUCES A SURFACE
TROUGH NEAR AMCHITKA EARLY WEDNESDAY MORNING WHICH SUBSEQUENTLY MOVES
OVER THE EASTERN ALEUTIANS.  NAM SHOWS ZONAL FLOW WHILE OLDER ECMWF
LEANS TOWARD THE GFS SOLUTION...WOULD EXPECT A TROUGH/LOW TO MOVE
OVER THE CENTRAL ALEUTIANS ON WED WITH MODERATE SOUTH WINDS.

OVER MAINLAND...HIGH PRESSURE WEAKENS THROUGH THE WEEK WITH COOLER
AIR MOVING FROM THE ARCTIC INTO SOUTHCENTRAL BY FRIDAY.  LITTLE IN
THE WAY OF CLOUDS OR MOISTURE IS EXPECTED.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...
FIRE WEATHER...NONE

JMP SEP 10

Gale Warnings in Alaska, 2010Every gale 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.