Gale Warning 315, NWS Anchorage, AK

057 
FZAK62 PAFC 162346
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT SAT APR 16 2011

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.

PKZ499-171500-
400 PM AKDT SAT APR 16 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
A 1009 MB LOW NEAR 51N 175W WILL WEAKEN OVER THE NORTH PACIFIC 
SAT EVENING. A 998 MB LOW NEAR 42N 172W WILL MOVE TO 50N 173W 
MON AFTERNOON WITH LITTLE CHANGE IN STRENGTH.  

$$

PKZ411-171500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT SAT APR 16 2011

.TONIGHT...NE WIND 30 KT. SEAS 12 FT. 
.SUN AND SUN NIGHT...NE WIND 30 KT. SEAS 11 FT. 
.MON THROUGH TUE...NE WIND 30 KT. SEAS 12 FT. 
.WED...NE WIND 30 KT. SEAS 12 FT. 
.THU...NE WIND 25 KT. SEAS 8 FT. 

$$

PKZ412-171500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT SAT APR 16 2011

.TONIGHT...NE WIND 30 KT. SEAS 9 FT. FREEZING SPRAY EAST OF 174W. 
.SUN...E WIND 25 KT. SEAS 8 FT. FREEZING SPRAY EAST OF 174W. 
.SUN NIGHT...E WIND 30 KT. SEAS 9 FT. 
.MON AND MON NIGHT...E WIND 35 KT. SEAS 11 FT. 
.TUE...E WIND 25 KT. SEAS 8 FT. 
.WED AND THU...NE WIND 25 KT. SEAS 8 FT. 

$$

PKZ413-171500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT SAT APR 16 2011

...GALE WARNING THROUGH SUNDAY NIGHT...

.TONIGHT...NE WIND 25 TO 35 KT. SEAS 13 FT. 
.SUN...E WIND 25 TO 35 KT. SEAS 12 FT. 
.SUN NIGHT...E WIND 40 KT. SEAS 15 FT. 
.MON AND MON NIGHT...E WIND 40 KT. SEAS 14 FT. 
.TUE...E WIND 30 KT. SEAS 13 FT. 
.WED AND THU...NE WIND 25 KT. SEAS 10 FT. 

$$

PKZ414-171500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT SAT APR 16 2011

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...E WIND 25 KT. SEAS IN ICE FREE WATERS 8 FT. 
.SUN...E WIND 30 KT. SEAS IN ICE FREE WATERS 8 FT. 
.SUN NIGHT...E WIND 40 KT. SEAS IN ICE FREE WATERS 10 FT.
.MON...E WIND 40 KT. SEAS IN ICE FREE WATERS 10 FT. 
.MON NIGHT AND TUE...E WIND 25 KT. SEAS IN ICE FREE WATERS 6 FT. 
.WED AND THU...NE WIND 30 KT. SEAS IN ICE FREE WATERS 8 FT. 

$$

708 
FZAK62 PAFC 171116
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT SUN APR 17 2011

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.

PKZ499-180300-
400 AM AKDT SUN APR 17 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
A 1000 MB LOW AT 49N 175W WILL MOVE TO 49N 175E LATE TONIGHT THEN
DISSIPATE BY MON AFTERNOON. A 996 MB LOW AT 45N 170W WILL MOVE TO 
49N 172W AT 994 MB LATE TONIGHT THEN TO 50N 170W AT 998 MB LATE MON
NIGHT.
$$

PKZ411-180300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT SUN APR 17 2011

.TODAY...NE WIND 30 KT. SEAS 12 FT. 
.TONIGHT AND MON...NE WIND 30 KT. SEAS 11 FT. 
.MON NIGHT...NE WIND 30 KT. SEAS 12 FT. 
.TUE...E WIND 30 KT. SEAS 12 FT. 
.WED...NE WIND 25 KT. SEAS 10 FT. 
.THU...NE WIND 20 KT. SEAS 9 FT. 

$$

PKZ412-180300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT SUN APR 17 2011

.TODAY...E WIND 25 KT. SEAS 8 FT. 
.TONIGHT AND MON...E WIND 30 KT. SEAS 10 FT. 
.MON NIGHT...E WIND 30 KT. SEAS 11 FT. 
.TUE...E WIND 25 KT. SEAS 9 FT. 
.WED AND THU...NE WIND 25 KT. SEAS 10 FT. 

$$

PKZ413-180300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT SUN APR 17 2011

...GALE WARNING THROUGH MONDAY...

.TODAY...E WIND 25 TO 35 KT. SEAS 12 FT. 
.TONIGHT...E WIND 40 KT. SEAS 15 FT. 
.MON...NE WIND 35 KT. SEAS 17 FT. 
.MON NIGHT AND TUE...E WIND 30 KT. SEAS 13 FT. 
.WED AND THU...NE WIND 30 KT. SEAS 12 FT. 

$$

PKZ414-180300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT SUN APR 17 2011

...GALE WARNING TONIGHT AND MONDAY...

.TODAY...E WIND 20 TO 30 KT. SEAS IN ICE FREE WATERS 7 FT. PATCHY
FOG.
.TONIGHT AND MON...E WIND 25 TO 35 KT. SEAS IN ICE FREE WATERS 7 TO
11 FT. PATCHY FOG.
.MON NIGHT...E WIND 30 KT. SEAS IN ICE FREE WATERS 8 FT. 
.TUE...NE WIND 20 KT. SEAS IN ICE FREE WATERS 6 FT. 
.WED AND THU...NE WIND 30 KT. SEAS IN ICE FREE WATERS 11 FT. 

$$

JAM APR 11

873 
FZAK62 PAFC 172346
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT SUN APR 17 2011

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.

PKZ499-181500-
400 PM AKDT SUN APR 17 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
A 993 MB LOW NEAR 48N 173W WILL REMAIN NEARLY STATIONARY AND WEAKEN
TO 1000 MB NEAR 50N 175W TUE AFTERNOON.

$$

PKZ411-181500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT SUN APR 17 2011

.TONIGHT...E WIND 30 KT. EXCEPT NORTH OF 56N...NE WIND 25 KT. SEAS 11
FT. 
.MON AND MON NIGHT...NE WIND 30 KT. SEAS 11 FT. 
.TUE...E WIND 25 KT. SEAS 12 FT. 
.TUE NIGHT AND WED...NE WIND 30 KT. SEAS 11 FT. 
.THU AND FRI...NE WIND 20 KT. SEAS 8 FT.

$$

PKZ412-181500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT SUN APR 17 2011

.TONIGHT...E WIND 25 KT. SEAS 8 FT. AREAS OF FOG. 
.MON AND MON NIGHT...E WIND 30 KT. SEAS 11 FT. AREAS OF FOG. 
.TUE THROUGH WED...NE WIND 25 KT. SEAS 9 FT. 
.THU AND FRI...NE WIND 25 KT. SEAS 9 FT. 

$$

PKZ413-181500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT SUN APR 17 2011

...GALE WARNING THROUGH MONDAY...

.TONIGHT...NE WIND 35 KT. SEAS 15 FT. 
.MON...NE WIND 35 KT. SEAS 16 FT. 
.MON NIGHT...E WIND 30 KT. SEAS 13 FT. 
.TUE...E WIND 25 KT. SEAS 13 FT. 
.TUE NIGHT AND WED...NE WIND 30 KT. SEAS 10 FT. 
.THU...NE WIND 30 KT. SEAS 13 FT. 
.FRI...NE WIND 20 KT. SEAS 9 FT.  

$$

PKZ414-181500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT SUN APR 17 2011

...GALE WARNING THROUGH MONDAY...

.TONIGHT...E WIND 35 KT. EXCEPT NORTH OF 56N...E WIND 25 KT. SEAS IN
ICE FREE WATERS 10 FT. AREAS OF FOG. 
.MON...E WIND 35 KT. EXCEPT NORTH OF 56N...E WIND 25 KT. SEAS IN ICE
FREE WATERS 11 FT. AREAS OF FOG. 
.MON NIGHT...NE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.TUE AND TUE NIGHT...NE WIND 20 KT. SEAS IN ICE FREE WATERS 6 FT. 
.WED...NE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.THU...NE WIND 30 KT. SEAS IN ICE FREE WATERS 12 FT. 
.FRI...N WIND 25 KT. SEAS IN ICE FREE WATERS 9 FT.  

$$

927 
FZAK62 PAFC 181136
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT MON APR 18 2011

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.

PKZ499-190300-
400 AM AKDT MON APR 18 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
A 994 MB LOW NEAR 48N 172W WILL MOVE TO 44N 174W AND STRENGTHEN TO
989 MB TUE NIGHT.
$$

PKZ411-190300-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 AM AKDT MON APR 18 2011

.TODAY...E WIND 25 KT. SEAS 10 FT. PATCHY FOG. 
.TONIGHT AND TUE...NE WIND 30 KT. SEAS 12 FT. 
.TUE NIGHT THROUGH THU...NE WIND 30 KT. SEAS 11 FT. 
.FRI...N WIND 20 KT. SEAS 9 FT.  

$$

PKZ412-190300-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 AM AKDT MON APR 18 2011

.TODAY...E WIND 30 KT. SEAS 10 FT. PATCHY FOG. 
.TONIGHT...E WIND 30 KT. SEAS 11 FT. PATCHY FOG. 
.TUE...NE WIND 30 KT. SEAS 10 FT. 
.TUE NIGHT AND WED...NE WIND 25 KT. SEAS 8 FT. 
.THU...NE WIND 35 KT. SEAS 11 FT. 
.FRI...N WIND 30 KT. SEAS 10 FT.  

$$

PKZ413-190300-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 AM AKDT MON APR 18 2011

...GALE WARNING TODAY...

.TODAY...NE WIND 35 KT. SEAS 14 FT. 
.TONIGHT...NE WIND 30 KT. SEAS 13 FT. 
.TUE...E WIND 30 KT. SEAS 12 FT. 
.TUE NIGHT...E WIND 30 KT. SEAS 11 FT. 
.WED...NE WIND 30 KT. SEAS 11 FT. 
.THU...NE WIND 35 KT. SEAS 14 FT. 
.FRI...N WIND 30 KT. SEAS 14 FT.  

$$

PKZ414-190300-
BERING SEA OFFSHORE EAST OF 171W
400 AM AKDT MON APR 18 2011

...GALE WARNING TODAY...

.TODAY...E WIND 25 KT...EXCEPT 35 KT S OF 56N. SEAS IN ICE FREE
WATERS 10 FT. 
.TONIGHT...NE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.TUE...NE WIND 25 KT. SEAS IN ICE FREE WATERS 6 FT. 
.TUE NIGHT...NE WIND 20 KT. SEAS IN ICE FREE WATERS 5 FT. 
.WED...NE WIND 30 KT. SEAS IN ICE FREE WATERS 8 FT. 
.THU...NE WIND 35 KT. SEAS IN ICE FREE WATERS 11 FT. 
.FRI...N WIND 35 KT. SEAS IN ICE FREE WATERS 12 FT.  

$$

JAM APR 11

148 
FZAK62 PAFC 182357
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT MON APR 18 2011

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.

PKZ499-191500-
400 PM AKDT MON APR 18 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
HIGH PRESSURE PERSISTS OVER THE NORTHERN BERING THROUGH THE FORECAST
PERIOD. A 998 MB LOW NEAR 49N 170W MOVES TO 50N 175W LATE WED MORNING
AT 994 MB AND THEN MERGES WITH A DEVELOPING LOW TO THE EAST. A 988 MB
LOW NEAR 45N 168W LATE WED MORNING MOVES TO 49N 175W LATE WED NIGHT
AT 983 MB.
$$

PKZ411-191500-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT MON APR 18 2011

.TONIGHT...NE WIND 30 KT. SEAS 11 FT. 
.TUE AND TUE NIGHT...NE WIND 25 KT. SEAS 11 FT. 
.WED THROUGH THU...NE WIND 30 KT. SEAS 11 FT. 
.FRI...N WIND 25 KT. SEAS 10 FT. 
.SAT...N WIND 20 KT. SEAS 6 FT.  

$$

PKZ412-191500-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT MON APR 18 2011

.TONIGHT...E WIND 30 KT. SEAS 11 FT. PATCHY FOG. 
.TUE AND TUE NIGHT...NE WIND 25 KT. SEAS 10 FT. 
.WED AND WED NIGHT...NE WIND 25 KT. SEAS 8 FT. 
.THU...NE WIND 35 KT. SEAS 11 FT. 
.FRI...N WIND 30 KT. SEAS 11 FT. 
.SAT...N WIND 25 KT. SEAS 8 FT.  

$$

PKZ413-191500-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT MON APR 18 2011

.TONIGHT...NE WIND 30 KT. SEAS 13 FT. 
.TUE AND TUE NIGHT...NE WIND 30 KT. SEAS 12 FT. 
.WED AND WED NIGHT...NE WIND 30 KT. SEAS 11 FT. 
.THU...NE WIND 35 KT. SEAS 14 FT. 
.FRI...N WIND 30 KT. SEAS 14 FT. 
.SAT...N WIND 25 KT. SEAS 10 FT.  

$$

PKZ414-191500-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT MON APR 18 2011

.TONIGHT...NE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.TUE AND TUE NIGHT...NE WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. 
.WED AND WED NIGHT...NE WIND 30 KT. SEAS IN ICE FREE WATERS 7 FT. 
.THU...NE WIND 35 KT. SEAS IN ICE FREE WATERS 11 FT. 
.FRI...N WIND 35 KT. SEAS IN ICE FREE WATERS 12 FT. 
.SAT...N WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
115 PM AKDT FRI APR 15 2011

.ANALYSIS AND UPPER LEVELS...A CLOSED UPPER LEVEL HIGH CENTERED
OVER EASTERN RUSSIA IS BUILDING EASTWARD TOWARD MAINLAND ALASKA
WHILE A CLOSED LOW OVER THE EASTERN ALEUTIANS TRACKS WESTWARD
UNDERNEATH THE HIGH. THE INFLUENCE OF THE HIGH IS RESULTING IN
CLEAR SKIES ACROSS MAINLAND ALASKA THIS MORNING. THE ONLY OTHER
NOTABLE FEATURE THIS MORNING IS THE UPPER LOW OVER THE EASTERN
ALEUTIANS AND A SURFACE LOW TO SOUTH...WHICH ARE PRODUCING AREAS
OF SNOW AS WELL AS LOCALLY STRONGER WINDS.

.MODEL DISCUSSION...MODELS HAVE COME INTO MUCH BETTER AGREEMENT
WITH LOWS OUT WEST THE NEXT COUPLE DAYS. SOLUTIONS BEGIN TO
DIVERGE ON MONDAY. THE ECMWF IS THE ONLY MODEL TO SHOW GOOD
RUN-TO-RUN CONSISTENCY SO IT IS THE PREFERRED SOLUTION FOR NOW.

.SHORT TERM FORECAST...

SOUTHERN MAINLAND...FOR THE MOST PART THE INFLUENCE OF THE UPPER
RIDGE WILL PROVIDE DRY CONDITIONS OVER MAINLAND ALASKA THE NEXT
FEW DAYS. HOWEVER...A COUPLE SHORT-WAVES WILL MOVE SOUTHWARD
ALONG THE EASTWARD PERIPHERY OF UPPER HIGH THE NEXT COUPLE DAYS.
THESE WILL BOTH ARRIVE OVER THE SOUTHERN HALF OF THE STATE DURING
THE PEAK HEATING TIMES OF THE AFTERNOON AND EVENING. 12Z SOUNDINGS
FROM ANCHORAGE AND MCGRATH SHOW A DEEP LAYER OF UNSTABLE BUT DRY
CONDITIONS. COMBINATION OF VERTICAL MOTION AHEAD OF SHORT-WAVES
COMBINED WITH MELTING SNOW ALONG THE MOUNTAINS SHOULD BE JUST
ENOUGH TO PRODUCE A FEW SHOWERS. THE GREATEST POTENTIAL FOR SHOWERS
WILL BE ALONG THE ALASKA RANGE TODAY AND THEN EXTENDING FURTHER
SOUTH TO THE TALKEETNA/CHUGACH/KENAI MOUNTAINS ON SATURDAY WITH
AS A SOMEWHAT STRONG SHORT-WAVE MOVES THROUGH. STORM MOTION WILL
GENERALLY BE ABOUT 10 TO 15 KT OUT OF THE NORTHEAST...SO WHAT
SHOWERS DO FORM WILL MOVE SLOWLY OFF THE MOUNTAINS AND LIKELY
WON'T MAKE IT VERY FAR. RIDGE WILL STRENGTHEN BEHIND THE SECOND
SHORT-WAVE SATURDAY NIGHT AND SUNDAY WHICH SHOULD PUT A CAP ON
CONVECTION AND PRODUCE SUNNY DAYS ON SUNDAY AND MONDAY.

BERING SEA/ALEUTIANS...UPPER LOW CURRENTLY ALONG THE EASTERN
ALEUTIANS WILL SET UP SHOP JUST SOUTH OF THE ALEUTIANS SATURDAY
NIGHT THROUGH MONDAY WITH A CORRESPONDING LOW AT THE SURFACE.
THUS...THE BULK OF ACTIVE WEATHER WILL REMAIN ALONG THE ALEUTIANS.

.LONG TERM FORECAST...CONFIDENCE IS LOW THROUGH THE EXTENDED
FORECAST PERIOD DUE TO A LARGE MODEL SPREAD IN SOLUTIONS. THE
RIDGE OVER MAINLAND ALASKA WILL RETREAT A BIT AS TROUGH OVER
NORTHWEST CANADA RETROGRADES WESTWARD OVER MAINLAND ALASKA.
THIS TROUGH WILL EVENTUALLY INTERACT WITH LOWS SOUTH OF THE
ALEUTIANS...BUT THAT IS WHERE THE DETAILS OF INDIVIDUAL SYSTEMS
BECOME HIGHLY UNCERTAIN.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE WARNING...170 172.
FIRE WEATHER...NONE.

SEB APR 11