Alert archive / Alaska / Storm Warnings in 2015

Storm Warning 70, NWS Anchorage, AK

May 20, 2015

NWS Anchorage, AK issued this storm warning at May 20, 2015, 3:01 PM AKDT. It was in force for 37 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 20, 2015, 3:01 PM AKDT (23:01 UTC)
Expired
May 22, 2015, 3:34 AM AKDT
In force
37 hr
Issued by
NWS Anchorage, AK

The text

As transmitted, in the capitals the NWS used until 2016.

103 
FZAK62 PAFC 202301
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
301 PM AKDT WED MAY 20 2015

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.

PKZ499-211400-
301 PM AKDT WED MAY 20 2015
.SYNOPSIS FOR CENTRAL BERING SEA...A FRONT IN THE CENTRAL BERING
WILL QUICKLY DISSIPATE WED NIGHT. THE 981 MB REMNANTS OF TYPHOON
DOLPHIN AT 47N 164E THU MORNING WILL MOVE TO 53N 169E AT 962 MB
THU AFTERNOON...THEN REACH PEAK INTENSITY AT 956 MB AT 54N 172E
FRI MORNING.

$$

PKZ411-211400-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
301 PM AKDT WED MAY 20 2015

...STORM WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...SW WIND 20 KT. SEAS 5 FT.
.THU...S WIND 15 TO 30 KT BECOMING SE 35 TO 50 KT IN THE
AFTERNOON. SEAS BUILDING TO 8 TO 15 FT. RAIN.
.THU NIGHT...SE WIND 35 TO 50 KT. SEAS 13 TO 21 FT. PATCHY FOG.
RAIN.
.FRI...SE WIND 25 TO 40 KT. SEAS 14 TO 22 FT.
.FRI NIGHT...SE WIND 15 TO 30 KT. SEAS 12 TO 18 FT.
.SAT...NW WIND 20 TO 35 KT. SEAS 9 TO 14 FT.
.SUN...W WIND UP TO 20 KT. SEAS 4 TO 9 FT.
.MON...NW WIND UP TO 10 KT. SEAS 4 FT.

$$

PKZ412-211400-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
301 PM AKDT WED MAY 20 2015

...STORM WARNING THURSDAY NIGHT...

.TONIGHT...W WIND 20 KT. SEAS 5 TO 8 FT.
.THU...SW WIND 15 TO 25 KT BECOMING S IN THE AFTERNOON. SEAS 6
FT.
.THU NIGHT...SE WIND 20 TO 35 KT IN THE EVENING INCREASING TO 35
TO 50 KT. SEAS 6 TO 11 FT BUILDING TO 10 TO 18 FT AFTER MIDNIGHT.
RAIN AND SNOW.
.FRI...SE WIND 30 TO 45 KT. SEAS 14 TO 22 FT.
.FRI NIGHT...SE WIND 20 TO 35 KT. SEAS 12 TO 19 FT.
.SAT...SE WIND 10 TO 25 KT. SEAS 8 TO 13 FT.
.SUN...SW WIND UP TO 20 KT. SEAS 6 TO 11 FT.
.MON...SE WIND UP TO 20 KT. SEAS 4 TO 9 FT.

$$

PKZ413-211400-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
301 PM AKDT WED MAY 20 2015

...STORM WARNING THURSDAY NIGHT...

.TONIGHT...W WIND 20 KT. SEAS 5 TO 9 FT.
.THU...SW WIND UP TO 20 KT BECOMING S 25 TO 40 KT IN THE
AFTERNOON. SEAS 5 TO 10 FT.
.THU NIGHT...SE WIND 35 TO 50 KT. SEAS 11 TO 21 FT. RAIN.
.FRI...S WIND 30 TO 45 KT. SEAS 13 TO 21 FT.
.FRI NIGHT...S WIND 20 TO 30 KT. SEAS 11 TO 16 FT.
.SAT THROUGH SUN...SW WIND 20 TO 35 KT. SEAS 9 TO 14 FT.
.MON...S WIND UP TO 20 KT. SEAS 3 TO 8 FT.

$$

PKZ414-211400-
BERING SEA OFFSHORE EAST OF 171W-
301 PM AKDT WED MAY 20 2015

.TONIGHT...W WIND 10 TO 20 KT. SEAS 3 TO 8 FT. PATCHY FOG.
.THU...NW WIND 10 KT BECOMING SE UP TO 10 KT IN THE AFTERNOON.
SEAS 3 TO 6 FT. PATCHY FOG.
.THU NIGHT...SE WIND UP TO 20 KT INCREASING TO 15 TO 30 KT AFTER
MIDNIGHT. SEAS 3 TO 7 FT. PATCHY FOG.
.FRI...SE WIND 20 TO 35 KT. SEAS 5 TO 10 FT.
.FRI NIGHT...SE WIND 20 TO 30 KT. SEAS 6 TO 11 FT.
.SAT THROUGH MON...SE WIND 15 TO 30 KT. SEAS 7 TO 12 FT.

$$
3 follow-up statements
991 
FZAK62 PAFC 211129
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
329 AM AKDT THU MAY 21 2015

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.

PKZ499-220130-
329 AM AKDT THU MAY 21 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
THE 979 MB REMNANTS OF TYPHOON DOLPHIN AT 51N 168E THU MORNING
MOVES TO 56N 173E AT 967 MB FRI MORNING. THIS LOW MOVES NEAR 56N
180W AT 979 MB SAT AFTERNOON. A FRONT WILL ENTER THE WESTERN
BERING SEA THU MORNING BEFORE MOVING INTO THE EASTERN BERING SEA
BY FRI EVENING BEFORE DISSIPATING BY SATURDAY AFTERNOON.

$$

PKZ411-220130-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
329 AM AKDT THU MAY 21 2015

...STORM WARNING THROUGH TONIGHT...

.TODAY...SE WIND 20 TO 35 KT INCREASING TO 35 TO 50 KT IN THE
AFTERNOON. STRONGEST S OF 56N. SEAS 7 TO 12 FT BUILDING TO 15 TO
20 FT S OF 56N IN THE AFTERNOON. RAIN.
.TONIGHT...SE WIND 35 TO 50 KT EXCEPT DIMINISHING TO 25 KT S OF
56N AFTER MIDNIGHT. SEAS 14 TO 22 FT. RAIN SHOWERS.
.FRI...E WIND 35 KT N OF 56N. S WIND 25 KT S OF 56N. SEAS 14 TO
22 FT. RAIN.
.FRI NIGHT...S WIND 15 TO 30 KT. SEAS 13 TO 17 FT.
.SAT...NW WIND 15 TO 30 KT. SEAS 8 TO 16 FT.
.SUN...W WIND UP TO 20 KT. SEAS 4 TO 9 FT.
.MON...NW WIND UP TO 10 KT. SEAS 4 FT.

$$

PKZ412-220130-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
329 AM AKDT THU MAY 21 2015

...STORM WARNING TONIGHT...

.TODAY...S WIND UP TO 20 KT INCREASING TO 15 TO 30 KT IN THE
AFTERNOON. SEAS 4 TO 8 FT.
.TONIGHT...SE WIND 35 TO 50 KT. SEAS 7 TO 12 FT BUILDING TO 11 TO
24 FT AFTER MIDNIGHT. 
.FRI...SE WIND 30 TO 45 KT. SEAS 15 TO 23 FT. 
.FRI NIGHT...SE WIND 25 TO 40 KT. SEAS 12 TO 20 FT.
.SAT...SE WIND 10 TO 25 KT. SEAS 8 TO 13 FT.
.SUN...SW WIND UP TO 20 KT. SEAS 6 TO 11 FT.
.MON...SE WIND UP TO 20 KT. SEAS 4 TO 9 FT.

$$

PKZ413-220130-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
329 AM AKDT THU MAY 21 2015

...STORM WARNING TONIGHT...

.TODAY...S WIND 10 TO 25 KT BECOMING SE 25 TO 40 KT IN THE
AFTERNOON. SEAS 6 TO 11 FT. RAIN.
.TONIGHT...SE WIND 35 TO 50 KT. SEAS 10 TO 20 FT. RAIN.
.FRI...SE WIND 30 TO 45 KT EXCEPT BECOMING SW 20 KT W OF 175W.
SEAS 13 TO 21 FT. RAIN.
.FRI NIGHT...SW WIND 15 TO 30 KT. SEAS 9 TO 16 FT.
.SAT THROUGH SUN...SW WIND 20 TO 35 KT. SEAS 9 TO 17 FT.
.MON...S WIND UP TO 20 KT. SEAS 3 TO 8 FT.

$$

PKZ414-220130-
BERING SEA OFFSHORE EAST OF 171W-
329 AM AKDT THU MAY 21 2015

...GALE WARNING FRIDAY...

.TODAY...VARIABLE WIND UP TO 15 KT BECOMING NE IN THE AFTERNOON.
SEAS 3 TO 6 FT. PATCHY FOG.
.TONIGHT...SE WIND 10 TO 25 KT. SEAS 3 TO 6 FT. AREAS OF DENSE FOG
N OF 56N. VSBY 1 NM OR LESS.
.FRI...SE WIND 20 TO 35 KT. SEAS 6 TO 11 FT. DENSE FOG N OF 56N.
VSBY 1 NM OR LESS.
.FRI NIGHT...SE WIND 20 TO 35 KT. SEAS 7 TO 12 FT.
.SAT THROUGH MON...SE WIND 15 TO 30 KT. SEAS 8 TO 13 FT.

$$
977 
FZAK62 PAFC 212308
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
308 PM AKDT THU MAY 21 2015

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.

PKZ499-221345-
308 PM AKDT THU MAY 21 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
THE 974 MB REMNANTS OF TYPHOON DOLPHIN AT 53N 170E MOVES TO 56N
171E AT 968 MB FRI AFTERNOON...THEN MOVES TO 54N 179W AT 980 MB
SAT AFTERNOON.

$$

PKZ411-221345-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
308 PM AKDT THU MAY 21 2015

...STORM WARNING TONIGHT...

.TONIGHT...SE WIND 35 TO 50 KT DIMINISHING TO 20 TO 30 KT S OF 56N
AFTER MIDNIGHT. SEAS 14 TO 22 FT. PATCHY FOG. RAIN.
.FRI...S WIND 25 TO 40 KT EXCEPT SW 20 TO 30 KT S OF 57N. SEAS 13
TO 21 FT. RAIN.
.FRI NIGHT...S TO W WIND 15 TO 30 KT. SEAS 12 TO 16 FT. RAIN.
.SAT...NE WIND 10 TO 25 KT. SEAS 10 TO 15 FT.
.SAT NIGHT...W WIND 15 TO 30 KT. SEAS 8 TO 13 FT.
.SUN...SW WIND UP TO 20 KT. SEAS 5 TO 10 FT.
.MON THROUGH TUE...NE WIND UP TO 15 KT. SEAS 5 TO 10 FT.

$$

PKZ412-221345-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
308 PM AKDT THU MAY 21 2015

...STORM WARNING TONIGHT...

.TONIGHT...SE WIND 35 TO 50 KT. SEAS 6 TO 11 FT BUILDING TO 10 TO
18 FT AFTER MIDNIGHT. RAIN.
.FRI...SE WIND 30 TO 45 KT. SEAS 13 TO 21 FT. RAIN.
.FRI NIGHT...SE WIND 20 TO 35 KT. SEAS 11 TO 19 FT. RAIN.
.SAT...SE WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.SAT NIGHT...SE WIND UP TO 20 KT. SEAS 9 TO 13 FT.
.SUN...SW WIND UP TO 20 KT. SEAS 6 TO 11 FT.
.MON THROUGH TUE...SE WIND 10 TO 20 KT. SEAS 7 TO 12 FT.

$$

PKZ413-221345-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
308 PM AKDT THU MAY 21 2015

...STORM WARNING TONIGHT...

.TONIGHT...SE WIND 35 TO 50 KT. SEAS 10 TO 18 FT. RAIN.
.FRI...S WIND 30 TO 45 KT DIMINISHING TO 20 TO 30 KT W OF 176W IN
THE AFTERNOON. SEAS 12 TO 20 FT. RAIN.
.FRI NIGHT...SW WIND 15 TO 30 KT. SEAS 9 TO 16 FT. RAIN.
.SAT...S WIND 15 TO 30 KT. SEAS 9 TO 16 FT.
.SAT NIGHT...SW WIND 15 TO 30 KT. SEAS 12 TO 17 FT.
.SUN...SW WIND 10 TO 25 KT. SEAS 8 TO 13 FT.
.MON THROUGH TUE...SE WIND UP TO 20 KT. SEAS 7 TO 12 FT.

$$

PKZ414-221345-
BERING SEA OFFSHORE EAST OF 171W-
308 PM AKDT THU MAY 21 2015

...GALE WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...SE WIND 15 KT INCREASING TO 15 TO 30 KT AFTER MIDNIGHT.
SEAS 4 FT. AREAS OF FOG. VSBY 1 NM OR LESS.
.FRI...SE WIND 20 TO 35 KT. SEAS 5 TO 10 FT. DENSE FOG. VSBY 1 NM
OR LESS.
.FRI NIGHT...SE WIND 20 TO 35 KT. SEAS 7 TO 12 FT. PATCHY DENSE
FOG. RAIN. VSBY 1 NM OR LESS.
.SAT...S WIND 20 TO 35 KT. SEAS 8 TO 12 FT.
.SAT NIGHT...S WIND 20 TO 30 KT. SEAS 9 TO 14 FT.
.SUN THROUGH TUE...SE WIND 15 TO 25 KT. SEAS 8 TO 13 FT.

$$
365 
FZAK62 PAFC 221134
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
334 AM AKDT FRI MAY 22 2015

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.

PKZ499-230145-
334 AM AKDT FRI MAY 22 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
THE 967 MB REMNANTS OF TYPHOON DOLPHIN AT 57N 173E FRI MORNING MOVES
TO 55N 174E AT 974 MB SAT MORNING. THIS LOW MOVES TO 59N 174W AT
993 MB SUN AFTERNOON. ANOTHER NORTH PACIFIC LOW MOVES NEAR 51N
166E AT 980 MB SUN AFTERNOON.

$$

PKZ411-230145-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
334 AM AKDT FRI MAY 22 2015

...GALE WARNING TODAY...

.TODAY...N OF 56N...SOUTHEAST WIND 25 TO 35 KT. S OF 56N...S WIND
15 TO 25 KT. SEAS 13 TO 21 FT...HIGHEST N OF 56N. RAIN.
.TONIGHT...S WIND 10 TO 25 KT. SEAS 12 TO 16 FT. RAIN.
.SAT...N OF 56N...VARIABLE WIND TO 15 MPH. S OF 56N...VARIABLE
WIND 20 KT BECOMING W IN THE AFTERNOON. SEAS 11 TO 15 FT. RAIN.
.SAT NIGHT...W WIND 10 TO 25 KT. SEAS 9 TO 13 FT.
.SUN...S WIND 10 TO 25 KT. SEAS 6 TO 11 FT.
.MON THROUGH TUE...NE WIND UP TO 20 KT. SEAS 6 TO 11 FT.

$$

PKZ412-230145-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
334 AM AKDT FRI MAY 22 2015

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE WIND 30 TO 45 KT. SEAS 14 TO 22 FT. RAIN. 
.TONIGHT...SE WIND 20 TO 35 KT. SEAS 12 TO 19 FT. RAIN.
.SAT...S WIND 10 TO 25 KT. SEAS 9 TO 14 FT. RAIN.
.SAT NIGHT...SE WIND 10 TO 25 KT. SEAS 9 TO 12 FT.
.SUN...SW WIND 10 TO 25 KT. SEAS 7 TO 12 FT.
.MON THROUGH TUE...SE WIND 15 TO 25 KT. SEAS 8 TO 13 FT.

$$

PKZ413-230145-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
334 AM AKDT FRI MAY 22 2015

...GALE WARNING TODAY...

.TODAY...SE WIND 30 TO 45 KT EXCEPT BECOMING SW 20 KT W OF 175W IN
THE AFTERNOON. SEAS 12 TO 20 FT. RAIN.
.TONIGHT...SW WIND 15 TO 30 KT. SEAS 11 TO 16 FT. RAIN.
.SAT...S WIND 15 TO 30 KT. SEAS 9 TO 15 FT. RAIN.
.SAT NIGHT...SW WIND 15 TO 30 KT. SEAS 11 TO 16 FT.
.SUN...SW WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.MON THROUGH TUE...SE WIND 10 TO 25 KT. SEAS 7 TO 12 FT.

$$

PKZ414-230145-
BERING SEA OFFSHORE EAST OF 171W-
334 AM AKDT FRI MAY 22 2015

...GALE WARNING THROUGH SATURDAY...

.TODAY...SE WIND 20 TO 35 KT. SEAS 5 TO 10 FT. DENSE FOG N OF 56N.
VSBY 1 NM OR LESS.
.TONIGHT...SE WIND 20 TO 35 KT. SEAS 7 TO 12 FT. AREAS OF FOG N OF
56N. RAIN. VSBY 1 NM OR LESS.
.SAT...S WIND 20 TO 35 KT. SEAS 8 TO 11 FT. RAIN.
.SAT NIGHT...S WIND 20 TO 30 KT. SEAS 8 TO 13 FT.
.SUN THROUGH TUE...SE WIND 15 TO 30 KT. SEAS 8 TO 13 FT.

$$

What forecasters said that day

The local office's own words before this storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Anchorage, AK wrote its last area forecast discussion before this storm warning went out at May 20, 4:03 AM AKDT, 10 hours 58 minutes earlier.

Area forecast discussion, May 20, 4:03 AM AKDT, 10 hours 58 minutes before
SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE ANCHORAGE AK
403 AM AKDT WED MAY 20 2015

CORRECTION TO SOUTHCENTRAL FIRE WEATHER DISCUSSION

.ANALYSIS AND UPPER LEVELS...
THE OVERALL WEATHER PATTERN REMAINS VERY SIMILAR TO THAT OF THE
LAST FEW DAYS...WITH STRONG RIDGING STRETCHING INTO THE EASTERN
MAINLAND AND A BROAD LOW OVER THE BERING BRINGING ABUNDANT
MOISTURE TO THE WESTERN MAINLAND. THE BERING LOW IS CENTERED OVER
THE PRIBILOF ISLANDS AND IS BRINGING YET ANOTHER ROUND OF
RAINFALL THROUGHOUT THE SOUTHWEST MAINLAND WITH DIMINISHING
SOUTHEASTERLY WINDS. MOISTURE FROM THIS SYSTEM CAN BE SEEN
STRETCHING AS FAR SOUTH AS 35N...WITH PRECIPITABLE WATER VALUES
OVER 200% TO 45N. THE RIDGING THAT IS KEEPING THE WEATHER MOSTLY
CLEAR AND DRY EAST OF THE ALASKA RANGE NOW STRETCHES FROM THE
NORTHEAST PACIFIC INTO THE EASTERN MAINLAND AND THE PANHANDLE.
WELL OUTSIDE OF THE AOR BUT NOTABLE NONE THE LESS...TYPHOON
DOLPHIN CAN BE SEEN MOVING NORTHEASTWARD OFF THE COAST OF JAPAN.
THIS SYSTEM WILL CONTINUE TRACKING TOWARDS THE WESTERN ALEUTIANS
OVER THE COURSE OF THIS WEEK...AND IS EXPECTED TO BEGIN IMPACTING
THE WESTERN BERING SEA LATE THURSDAY.

&&

.MODEL DISCUSSION...
THE MODELS REMAIN IN VERY GOOD AGREEMENT WITH THE SYNOPTIC SCALE
FEATURES THROUGH THE END OF THE WEEK WHEN THEY CONTINUE TO HAVE
ISSUES AGREEING ON THE INTENSITY OF THE REMNANTS OF TYPHOON
DOLPHIN OVER THE WESTERN BERING. THE GOOD NEWS IS THAT THE MODELS
HAVE COME INTO MUCH BETTER AGREEMENT WITH THE SPEED OF THIS SYSTEM
WITH THE ADDITION OF THE 22/00Z EC...SO FORECAST CONFIDENCE IS
INCREASING IN THE TIMING OF THIS SYSTEM. THEY ALSO HAVE COME INTO
SLIGHTLY BETTER AGREEMENT WITH THE INTENSITY OF THE LOW...BUT THE
EC CONTINUES TO BE A CONSISTENT WEAK OUTLIER...WHILE THE NAM IS
THE SLIGHTLY DEEPER THAN THE GFS/GEM. THE GFS HAS BEEN THE MOST
CONSISTENT WITH THIS SYSTEM...SO IT WAS USED HEAVILY FOR THE
FORECAST PACKAGE TO FURTHER DEEPEN THE LOW. ONE INTERESTING NOTE
FROM THE GFS IS THAT THE GFS ENSEMBLE MEAN ACTUALLY DEEPER THAN
THE LAST TWO OPERATIONAL RUNS (AT TIMES AS MUCH AS 5 TO 6 MB).
WHILE THIS IS ALLOWING FOR HIGHER CONFIDENCE IN A DEEPER SYSTEM
THAN WAS PREVIOUSLY FORECAST...IT MAY NEED TO BE DEEPENED EVEN
FURTHER IF THIS TREND CONTINUES.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA...
HIGH PRESSURE CONTINUES TO DOMINATE THE SOUTHCENTRAL BUT THE
APPROACHING FRONT FROM THE SOUTHWEST IS BRINGING CLOUD COVER OVER
THE WESTERN PORTIONS OF THE SOUTHCENTRAL. HOWEVER...THE FRONT WILL
STALL OVER KODIAK ISLAND AND THE HIGH WILL REMAIN THE DOMINATE
FEATURE FOR THE NEXT COUPLE DAYS. THIS WILL KEEP DIURNAL TRENDS
GOING FOR WINDS WITH SEA BREEZES ALONG COASTAL AREAS. GAP FLOWS
WILL INCREASE THOUGH TODAY ACROSS SOUTHCENTRAL AS THE GULF RIDGE
BUILDS IN ADVANCE OF THE FRONTAL SYSTEM MOVING TOWARD KODIAK
ISLAND. STRONGEST FLOWS ARE EXPECTED ACROSS TURNAGAIN ARM (ESE
WIND)...ALONG THE COPPER RIVER(S WIND). GAP FLOWS SHOULD DIMINISH
TONIGHT AS GRADIENTS RELAX. TEMPERATURES WILL ALSO STAY
WARM...ESPECIALLY FOR PLACES IN THE COPPER RIVER BASIN.

&&

.FIRE WEATHER...
AREAS OF CONCERN ARE EXPANDING THROUGHOUT THE SOUTHCENTRAL AS
AFTERNOON AND EVENING WINDS INCREASE. THE TWO AREAS THAT WILL BE
THE CLOSEST TO CRITICAL LEVELS ARE THE COPPER RIVER BASIN AND TO A
LESSER EXTENT THE KNIK RIVER VALLEY. THE COPPER RIVER STILL
REMAINS THE PRIMARY AREA OF CONCERN THROUGH THU. RH VALUES ARE
EXPECTED TO DIP TO RED FLAG THRESHOLDS THIS AFTERNOON AND SOUTH
WINDS ARE ALSO EXPECTED TO GUST AT LEAST TO 25 MPH ALONG THE
COPPER RIVER. RH VALUES ARE EXPECTED TO RECOVER AND WINDS DIMINISH
BY LATE THIS EVENING. WARM AND DRY CONDITIONS WITH GENERALLY LIGHT
WINDS ARE EXPECTED IN THE COPPER RIVER BASIN THU. HOWEVER
CONDITIONS SHOULD BE SOMEWHAT DRIER AND ALLOW FOR RED FLAG RH
CONDITIONS TO REDEVELOP IN THE AFTERNOON AND EVENING THU. FOR THE
KNIK RIVER VALLEY RH VALUES WILL DROP TO AROUND 30 PERCENT DURING
THE AFTERNOON AND EVENING HOURS THROUGH THU. THE DIFFERENCE TODAY
WILL BE GUSTY SOUTHEAST WINDS AROUND 20 MPH.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (DAYS 1 AND 2)...
THE FRONTAL BOUNDARY WILL STALL OVER THE MAINLAND TODAY ALONG WITH
A DEEP STREAM OF MOISTURE ORIGINATING FROM THE SUBTROPICS. THESE
CONDITIONS WILL FACILITATE A CONTINUATION OF STEADY LIGHT RAIN
OVER MUCH OF THE AREA. STRONG AND DEEP LAYER CROSS BARRIER FLOW IS
TAKING SOME OF THE BITE OUT OF THE RAIN IN THE LEES OF THE
ALEUTIAN RANGE AND THE KILBUCKS BUT PLENTIFUL MOISTURE ALOFT IS
STILL MAKING IT TO THE SURFACE. THE FRONT WILL GRADUALLY WEAKEN
THROUGHOUT THE DAY DIMINISHING GUSTY SOUTHEASTERLY WINDS BY LATE
THIS EVENING. PRECIPITATION WILL ALSO STEADILY LIGHTEN UP DURING
THE OVERNIGHT HOURS INTO THURSDAY HOWEVER WEAK
STABILITY...LINGERING MOISTURE...AND A PERSISTENT JET ALOFT WILL
KEEP SOME AREAS OF LIGHT RAIN AROUND THROUGH THE DAY ON THURSDAY.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (DAYS 1 AND 2)...
THE FRONTAL BOUNDARY HAS MAINLY CLEARED THE BERING SEA...LINGERING
TOWARD THE MAINLAND. CYCLONIC FLOW ALOFT WILL KEEP THE CHANCE FOR
SHOWERS FROM THE CENTRAL TO THE EASTERN BERING WITH PROBABILITIES
DECREASING TODAY AND TOMORROW. THIS EVENING INTO THURSDAY ALL EYES
TURN TO THE APPROACHING REMNANTS AND EXTRATROPICAL TRANSITION OF
TYPHOON DOLPHIN. A SURGE OF TROPICAL AIR WITH THE WARM FRONT AND
RAPIDLY DEEPENING SURFACE PRESSURES WILL BRING A STORM FORCE FRONT
INTO THE WESTERN AND CENTRAL BERING SEA. WIDESPREAD RAIN WILL
ACCOMPANY THE FRONT AS WELL AS SEAS QUICKLY BUILDING THURSDAY
MORNING UP TO TWENTY FEET.

&&

.LONG TERM FORECAST (FRIDAY THROUGH TUESDAY)...
BEGINNING THE EXTENDED FORECAST ON FRIDAY...THE STRONG NORTH EAST
PACIFIC RIDGE EXTENDING INTO NORTHERN ALASKA WILL REMAIN IN
PLACE...WITH THE STRONG REMNANTS OF FORMER TYPHOON DOLPHIN OVER
THE FAR WESTERN BERING. THIS WILL MEAN WARM AND DRY WEATHER ACROSS
SOUTHCENTRAL ALASKA...WITH A REMNANT WEAK FRONTAL ZONE OVER
SOUTHWEST AND THE EASTERN BERING KEEPING CLOUDS AND PRECIPITATION
OVER THAT REGION. EVENTUALLY...THE LARGE UPPER LOW OVER THE
WESTERN BERING WILL BEGIN TO MAKE EASTWARD PROGRESS AS NUMEROUS
LOBES OF ENERGY ROTATE AROUND THE LOW. THIS WILL SPREAD CLOUDS AND
PRECIPITATION INTO SOUTHCENTRAL ALASKA SATURDAY AND SUNDAY. BY
NEXT WEEK...THERE IS SOME DISCREPANCY WITH SMALLER SCALE
DETAILS...BUT THERE ARE SIGNS THAT THE STRONG NORTH EAST PACIFIC
RIDGE REBUILDS INTO ALASKA MONDAY AND TUESDAY...BRINGING MORE
WARMER AND DRIER WEATHER TO ALASKA...KEEPING THE STORM TRACK OVER
THE BERING SEA.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...STORM 177 178
GALE 175 176.
FIRE WEATHER...RED FLAG WARNING 141.

&&

SYNOPSIS AND MODEL DISCUSSION...DEK
SOUTHCENTRAL ALASKA...RMC
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...ML
LONG TERM...JA

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 3:49 AM AKDTGale WarningAFC11 hr
May 20, 3:49 AM AKDTStorm WarningAFC48 hr
May 20, 3:53 AM AKDTGale WarningAFC48 hr
May 20, 3:53 AM AKDTStorm WarningAFC48 hr
May 20, 10:48 AM AKDTGale WarningAFC4 hr
May 20, 3:01 PM AKDTGale WarningAFC37 hr
May 20, 3:01 PM AKDTSmall Craft AdvisoryAFC37 hr
May 20, 3:01 PM AKDTStorm WarningAFC12 hr

Nearby

Storm Warnings in Alaska, 2015Every storm warning in 2015

Sources

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