Gale Warning 437, NWS Anchorage, AK

508 
FZAK62 PAFC 012334
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
334 PM AKDT WED JUN 1 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.

PKZ499-021145-
334 PM AKDT WED JUN 1 2011
.SYNOPSIS FOR CENTRAL BERING SEA...
A 978 MB LOW NEAR 59N 178W WILL WEAKEN TO 987 MB AS IT MOVES TO
60N 174E THURSDAY AFTERNOON. A NORTH PACIFIC LOW WILL DEEPEN TO
977 MB AS IT MOVES TO 53N 171W THURSDAY...THE LOW WILL THEN WEAKEN
TO 980 MB AS IT MOVES TO NEAR 58N 169W FRIDAY AFTERNOON. 

$$

PKZ411-021145-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
334 PM AKDT WED JUN 1 2011

.TONIGHT...W WIND 20 KT. SEAS 10 FT. 
.THU...W WIND 15 KT. SEAS 7 FT. 
.THU NIGHT...W WIND 15 KT. SEAS 6 FT. 
.FRI...W WIND 20 KT. SEAS 6 FT. 
.FRI NIGHT...W WIND 20 KT. SEAS 7 FT. 
.SAT...NW WIND 25 KT. SEAS 7 FT.
.SUN...W WIND 20 KT. SEAS 6 FT. 
.MON...SW WIND 15 KT. SEAS 5 FT.  

$$

PKZ412-021145-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
334 PM AKDT WED JUN 1 2011

...GALE WARNING TONIGHT...

.TONIGHT...S WIND 35 KT DIMINISHING TO 25 KT AFTER MIDNIGHT. SEAS
12 FT. 
.THU...SE WIND 25 KT BECOMING N IN THE AFTERNOON. SEAS 9 FT. RAIN.
.THU NIGHT...N WIND 25 KT. SEAS 10 FT. RAIN.
.FRI...NW WIND 30 KT. SEAS 9 FT. 
.FRI NIGHT...W WIND 25 KT. SEAS 8 FT. 
.SAT...NW WIND 25 KT. SEAS 7 FT.
.SUN...W WIND 15 KT. SEAS 6 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 4 FT.  

$$

PKZ413-021145-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
334 PM AKDT WED JUN 1 2011

.TONIGHT...S WIND 20 KT BECOMING NW 25 KT AFTER MIDNIGHT. SEAS
11 FT. RAIN.
.THU...NW WIND 30 KT. SEAS 8 FT. RAIN.
.THU NIGHT...W WIND 30 KT. SEAS 9 FT. 
.FRI...W WIND 30 KT. SEAS 9 FT. 
.FRI NIGHT...W WIND 25 KT. SEAS 8 FT. 
.SAT...W WIND 25 KT. SEAS 9 FT. 
.SUN...W WIND 20 KT. SEAS 8 FT. 
.MON...W WIND 15 KT. SEAS 5 FT.  

$$

PKZ414-021145-
BERING SEA OFFSHORE EAST OF 171W
334 PM AKDT WED JUN 1 2011

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...E WIND 35 KT. SEAS 11 FT. RAIN SHOWERS. 
.THU...E WIND 40 KT. SEAS 12 FT. PATCHY FOG. RAIN.
.THU NIGHT...E WIND 35 KT. SEAS 13 FT. PATCHY FOG. RAIN.
.FRI...SW WIND 35 KT. SEAS 12 FT. 
.FRI NIGHT...SW WIND 30 KT. SEAS 12 FT. 
.SAT...SW WIND 30 KT. SEAS 11 FT. 
.SUN...S WIND 25 KT. SEAS 8 FT. 
.MON...SW WIND 20 KT. SEAS 6 FT.  

$$

654 
FZAK62 PAFC 021037
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
237 AM AKDT THU JUN 2 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.

PKZ499-030000-
237 AM AKDT THU JUN 2 2011
.SYNOPSIS FOR CENTRAL BERING SEA...

A 978 MB LOW NEAR 59N 178W WILL WEAKEN TO 987 MB AS IT MOVES TO
60N 174E THURSDAY AFTERNOON. A NORTH PACIFIC LOW WILL DEEPEN TO
977 MB AS IT MOVES TO 53N 171W THURSDAY...THE LOW WILL THEN WEAKEN
TO 980 MB AS IT MOVES TO NEAR 58N 169W FRIDAY AFTERNOON.

$$

PKZ411-030000-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
237 AM AKDT THU JUN 2 2011

.TODAY...W WIND 15 KT. SEAS 8 FT. 
.TONIGHT...W WIND 15 KT. SEAS 6 FT. 
.FRI...W WIND 20 KT. SEAS 6 FT. 
.FRI NIGHT...W WIND 25 KT. SEAS 7 FT. 
.SAT...NW WIND 20 KT. SEAS 8 FT.
.SUN...W WIND 15 KT. SEAS 6 FT. 
.MON...SW WIND 15 KT. SEAS 4 FT.  

$$

PKZ412-030000-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
237 AM AKDT THU JUN 2 2011

.TODAY...E WIND 30 KT. SEAS 9 FT. RAIN.
.TONIGHT...NW WIND 25 KT. SEAS 10 FT. RAIN.
.FRI...W WIND 30 KT. SEAS 10 FT. 
.FRI NIGHT...W WIND 25 KT. SEAS 9 FT. 
.SAT...W WIND 25 KT. SEAS 9 FT. 
.SUN...W WIND 20 KT. SEAS 8 FT. 
.MON...W WIND 15 KT. SEAS 5 FT.  

$$

PKZ413-030000-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
237 AM AKDT THU JUN 2 2011

...GALE WARNING TONIGHT...

.TODAY...NW WIND 30 KT. SEAS 9 FT. RAIN.
.TONIGHT...W WIND 35 KT. SEAS 10 FT. 
.FRI...W WIND 25 KT. SEAS 10 FT. 
.FRI NIGHT...W WIND 25 KT. SEAS 8 FT. 
.SAT...W WIND 25 KT. SEAS 9 FT. 
.SUN...W WIND 20 KT. SEAS 7 FT. 
.MON...SW WIND 15 KT. SEAS 5 FT.  

$$

PKZ414-030000-
BERING SEA OFFSHORE EAST OF 171W
237 AM AKDT THU JUN 2 2011

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 40 KT. SEAS 13 FT. PATCHY FOG. RAIN.
.TONIGHT...SE WIND 35 KT. SEAS 14 FT. PATCHY FOG. RAIN.
.FRI...SW WIND 30 KT. SEAS 13 FT. PATCHY FOG. RAIN SHOWERS. 
.FRI NIGHT...SW WIND 30 KT. SEAS 12 FT. 
.SAT...SW WIND 25 KT. SEAS 10 FT. 
.SUN...S WIND 20 KT. SEAS 8 FT. 
.MON...SW WIND 15 KT. SEAS 5 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
200 PM AKDT TUE MAY 31 2011

.ANALYSIS AND UPPER LEVELS...
WEATHER PATTERN CURRENTLY BEING DOMINATED BY A LARGE LOW PRESSURE
SYSTEM AND ASSOCIATED WEATHER FRONT IN THE CENTRAL/EASTERN BERING
SEA. THE 975 MB LOW IS NEAR THE PRIBILOF ISLANDS EARLY THIS AFTERNOON
WHILE HIGH PRESSURE BUILDS AHEAD OF THE SYSTEM OVER SOUTHCENTRAL
ALASKA. THE THERMAL TROUGH THAT HAS BEEN SO PREVALENT THE LAST
SEVERAL DAYS NEAR THE ALASKA RANGE HAS RETREATED NORTH NEAR THE YUKON
RIVER VALLEY.

.MODEL DISCUSSION...VERY FEW DIFFERENCES IN THE MODEL SOLUTIONS
TODAY. THE 12Z GFS INITIALIZED BETTER EARLY THIS MORNING ON THE
STRONG SOUTHEASTERLY WINDS ALONG THE FRONTAL BOUNDARY AS WELL AS
DISPLAYING SLIGHTLY BETTER RUN TO RUN CONSISTENCY.

.SHORT TERM FORECAST...LOW STILL DEEPENING OUT WEST AS THE FRONTAL
BOUNDARY APPROACHES THE NORTHWEST GULF COAST. A POTENT SHORTWAVE
EMBEDDED IN THE SOUTHERLY FLOW WILL HELP DEVELOP THE TRIPLE POINT LOW
NEAR KODIAK ISLAND LATER THIS EVENING. DEPENDING ON THE STRENGTH OF
THAT TRIPLE POINT FEATURE...IT COULD PLAY HAVOC WITH THE EXPECTED
WINDS OUT OF TURNAGAIN ARM AND THE KNIK RIVER VALLEY. AT THIS TIME WE
BELIEVE THE UPSTREAM RIDGE AND APPROACHING SYSTEM WILL TIGHTEN THE
GRADIENT...INCREASING THE WINDS THROUGH CHANNELED TERRAIN.
SOUTHEASTERLY WINDS ARE EXPECTED TO INCREASE ACROSS SOUTH AND WEST
ANCHORAGE LATER THIS AFTERNOON.

THESE SAME WINDS ARE ALREADY CAUSING RED FLAG CONDITIONS OVER THE
COPPER RIVER BASIN WHERE DRIER AIR ALOFT MIXED DOWN TO THE SURFACE.
WILL HAVE TO MONITOR THE MATANUSKA VALLEY FOR SIMILAR CONDITIONS BUT
BELIEVE THAT THE INCREASING CLOUDS WILL HELP MITIGATE ANY POTENTIAL
LATER THIS AFTERNOON/EVENING.

SHOWERS WILL CONTINUE TO SPREAD INLAND THIS EVENING AND LAST THROUGH
TOMORROW AFTERNOON. THE DISSIPATING FRONTAL BOUNDARY WILL STALL OVER
THE KENAI PENINSULA THANKS TO HIGH PRESSURE. BY WEDNESDAY
NIGHT...SHOWERS WILL DISSIPATE ACROSS THE REGION AS THE THERMAL
TROUGH STRENGTHENS NEAR THE ALASKA RANGE. RELATIVELY WARM AIR ALOFT
AND STRONG SUBSIDENCE SHOULD BE ENOUGH TO PREVENT THUNDERSTORMS FROM
DEVELOPING THROUGH MID WEEK.

FURTHER WEST...WINDY AND WET CONDITIONS TODAY EVENTUALLY GIVE WAY TO
BUILDING HIGH PRESSURE OVER THE NEXT 48 HOURS. ANOTHER LARGE NORTH
PACIFIC LOW DEVELOPS SOUTH OF THE CHAIN AND SENDS A FRONTAL BOUNDARY
ACROSS THE ALASKA PENINSULA THURSDAY NIGHT INTO FRIDAY...A SIMILAR
SETUP FROM TODAYS WEATHER. THIS LOW SLOWLY WEAKENS AND STAYS NEARLY
STATIONARY OVER THE CENTRAL/EASTERN BERING INTO THE WEEKEND...KEEPING
MOIST SOUTH TO SOUTHWESTERLY FLOW OVER MUCH OF OUR FORECAST AREA OF
RESPONSIBILITY.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALE WARNING...155 170 172 179 180 185 411 412 413 414.
FIRE WEATHER...RED FLAG WARNING 141.

AB MAY 11