Alert archive / Alaska / Storm Warnings in 2015
Storm Warning 70, NWS Anchorage, AK
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 3:49 AM AKDT | Gale Warning | AFC | 11 hr | |
| May 20, 3:49 AM AKDT | Storm Warning | AFC | 48 hr | |
| May 20, 3:53 AM AKDT | Gale Warning | AFC | 48 hr | |
| May 20, 3:53 AM AKDT | Storm Warning | AFC | 48 hr | |
| May 20, 10:48 AM AKDT | Gale Warning | AFC | 4 hr | |
| May 20, 3:01 PM AKDT | Gale Warning | AFC | 37 hr | |
| May 20, 3:01 PM AKDT | Small Craft Advisory | AFC | 37 hr | |
| May 20, 3:01 PM AKDT | Storm Warning | AFC | 12 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.