Wind Chill Advisory 2, NWS Anchorage, AK

837 
WWAK41 PAFC 121310
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
410 AM AKST WED FEB 12 2014

AKZ131-130200-
/X.NEW.PAFC.WW.Y.0008.140213T0000Z-140213T2100Z/
/X.CON.PAFC.WC.Y.0002.000000T0000Z-140212T2200Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
410 AM AKST WED FEB 12 2014

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 1 PM AKST THIS
AFTERNOON THROUGH THOMPSON PASS...
...WINTER WEATHER ADVISORY FOR BLOWING SNOW IN EFFECT FROM 3 PM
THIS AFTERNOON TO NOON AKST THURSDAY THROUGH THOMPSON PASS...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A WINTER
WEATHER ADVISORY FOR BLOWING SNOW...WHICH IS IN EFFECT FROM 3 PM
THIS AFTERNOON TO NOON AKST THURSDAY. THE WIND CHILL ADVISORY
REMAINS IN EFFECT UNTIL 1 PM AKST THIS AFTERNOON. 

* LOCATION...THOMPSON PASS. 

* SNOW...4 TO 7 INCHES. 

* VISIBILITY...LESS THAN ONE HALF MILE AT TIMES. 

* WIND...NORTHEAST WIND 20 TO 40 MPH. 

* WIND CHILL VALUES...40 TO 45 BELOW ZERO THROUGH 1 PM THIS AFTERNOON.

* TIMING...VERY LOW WIND CHILL TEMPERATURES WILL WARM EARLY THIS
  AFTERNOON AS THE TEMPERATURE INCREASES. SNOW WILL BEGIN LATER IN
  THE AFTERNOON...AND COMBINE WITH THE WINDS TO CREATE LOW
  VISIBILITIES. LOW VISIBILITIES IN BLOWING SNOW WILL CONTINUE
  THROUGH THURSDAY MORNING. WINDS AND SNOW WILL DIMINISH AROUND
  NOON ON THURSDAY. 

* IMPACTS...EXPOSED SKIN RISKS FROSTBITE WITHIN MINUTES. VISIBILITIES
  WILL BE LIMITED IN HEAVY SNOWFALL. TRAVEL MAY BE DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROSTBITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT VISIBILITIES
WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW. USE CAUTION
WHEN TRAVELING. 

&&

$$

249 
WWAK41 PAFC 122155
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
1255 PM AKST WED FEB 12 2014

AKZ131-131100-
/X.EXT.PAFC.WC.Y.0002.000000T0000Z-140213T0600Z/
/X.CON.PAFC.WW.Y.0008.140213T0000Z-140213T2100Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
1255 PM AKST WED FEB 12 2014

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 9 PM AKST THIS EVENING
THROUGH THOMPSON PASS...
...WINTER WEATHER ADVISORY FOR BLOWING SNOW REMAINS IN EFFECT
UNTIL NOON AKST THURSDAY THROUGH THOMPSON PASS...

* LOCATION...THOMPSON PASS.

* SNOW...4 TO 8 INCHES.

* VISIBILITY...LESS THAN ONE HALF MILE AT TIMES.

* WIND...NORTHEAST WIND 20 TO 40 MPH.

* WIND CHILL VALUES...40 TO 45 BELOW ZERO THROUGH 9 PM THIS EVENING.

* TIMING...VERY LOW WIND CHILL TEMPERATURES WILL WARM DURING THE
  EVENING HOURS AS WINDS BECOMING EASTERLY AND DECREASE AND
  TEMPERATURES WARM. SNOW...MODERATE AT TIMES...WILL
  CONTINUE...AND COMBINE WITH THE WINDS TO CREATE LOW VISIBILITIES.
  LOW VISIBILITIES IN BLOWING SNOW WILL CONTINUE THROUGH THURSDAY
  MORNING. WINDS AND SNOW WILL DIMINISH AROUND NOON ON THURSDAY.

* IMPACTS...EXPOSED SKIN RISKS FROSTBITE WITHIN MINUTES. 
  VISIBILITIES WILL BE LIMITED IN HEAVY SNOWFALL. TRAVEL MAY BE 
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROSTBITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW.
USE CAUTION WHEN TRAVELING.

&&

$$

883 
WWAK41 PAFC 130040
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
340 PM AKST WED FEB 12 2014

AKZ131-131400-
/X.CON.PAFC.WC.Y.0002.000000T0000Z-140213T0600Z/
/X.CON.PAFC.WW.Y.0008.000000T0000Z-140213T2100Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
340 PM AKST WED FEB 12 2014

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 9 PM AKST THIS
EVENING THROUGH THOMPSON PASS...
...WINTER WEATHER ADVISORY FOR BLOWING SNOW REMAINS IN EFFECT
UNTIL NOON AKST THURSDAY THROUGH THOMPSON PASS...

* LOCATION...THOMPSON PASS.

* SNOW...4 TO 7 INCHES.

* VISIBILITY...LESS THAN ONE HALF MILE AT TIMES.

* WIND...NORTHEAST 25 TO 35 MPH WITH GUSTS TO 45 MPH.

* WIND CHILL VALUES...35 TO 45 BELOW ZERO THROUGH 9 PM THIS 
  EVENING.

* TIMING...WIND CHILL TEMPERATURES WILL MODERATE DURING THE
  EVENING HOURS. LOW VISIBILITIES IN BLOWING SNOW WILL CONTINUE
  THROUGH THURSDAY MORNING. WINDS AND SNOW WILL DIMINISH AROUND
  NOON ON THURSDAY.

* IMPACTS...EXPOSED SKIN RISKS FROSTBITE WITHIN MINUTES.
  VISIBILITIES WILL BE LIMITED IN HEAVY SNOWFALL. TRAVEL MAY BE
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROSTBITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW.
USE CAUTION WHEN TRAVELING.

&&

$$

373 
WWAK41 PAFC 130535
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
835 PM AKST WED FEB 12 2014

AKZ131-131500-
/X.EXT.PAFC.WC.Y.0002.000000T0000Z-140213T2100Z/
/X.CON.PAFC.WW.Y.0008.000000T0000Z-140213T2100Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
835 PM AKST WED FEB 12 2014

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL NOON AKST THURSDAY
THROUGH THOMPSON PASS...

...WINTER WEATHER ADVISORY FOR BLOWING SNOW REMAINS IN EFFECT
UNTIL NOON AKST THURSDAY THROUGH THOMPSON PASS...

* LOCATION...THOMPSON PASS.

* SNOW...4 TO 7 INCHES.

* VISIBILITY...LESS THAN ONE HALF MILE AT TIMES.

* WIND...NORTHEAST 25 TO 35 MPH WITH GUSTS TO 45 MPH.

* WIND CHILL VALUES...35 TO 40 BELOW ZERO. 

* TIMING...SOME WARMING OF AIR TEMPERATURES IS EXPECTED EARLY
  THURSDAY WITH WIND CHILL VALUES MODERATING AT THAT TIME. LOW
  VISIBILITIES IN BLOWING SNOW WILL CONTINUE THROUGH MID DAY
  THURSDAY BEFORE WINDS AND SNOW BEGIN TO DIMINISH.

* IMPACTS...EXPOSED SKIN RISKS FROSTBITE WITHIN MINUTES. 
  VISIBILITIES WILL BE LIMITED IN HEAVY SNOWFALL. TRAVEL MAY BE 
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROSTBITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW.
USE CAUTION WHEN TRAVELING.

&&

$$

JAM

055 
WWAK41 PAFC 131406
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
506 AM AKST THU FEB 13 2014

AKZ131-132100-
/X.CON.PAFC.WC.Y.0002.000000T0000Z-140213T2100Z/
/X.CON.PAFC.WW.Y.0008.000000T0000Z-140213T2100Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
506 AM AKST THU FEB 13 2014

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON AKST TODAY
THROUGH THOMPSON PASS...
...WINTER WEATHER ADVISORY FOR BLOWING SNOW REMAINS IN EFFECT
UNTIL NOON AKST TODAY THROUGH THOMPSON PASS...

* LOCATION...THOMPSON PASS. 

* SNOW...ADDITIONAL ACCUMULATION OF 2 TO 3 INCHES. 

* VISIBILITY...LESS THAN ONE HALF MILE AT TIMES. 

* WIND...NORTHEAST 25 TO 35 MPH. 

* WIND CHILL VALUES...40 BELOW TO 45 BELOW. 

* TIMING...TEMPERATURES WILL WARM AND WINDS WILL DIMINISH AROUND
  NOON TODAY. LOW VISIBILITIES IN BLOWING SNOW WILL CONTINUE THIS
  MORNING THEN IMPROVE THIS AFTERNOON AS THE WINDS AND SNOW BEGIN TO
  DIMINISH. 

* IMPACTS...EXPOSED SKIN RISKS FROSTBITE WITHIN MINUTES.
  VISIBILITIES WILL BE LIMITED IN BLOWING SNOW. TRAVEL MAY BE
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROSTBITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW.
USE CAUTION WHEN TRAVELING.

&&

$$

413 
WWAK41 PAFC 132039
WSWAER

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
1139 AM AKST THU FEB 13 2014

AKZ131-132145-
/X.CAN.PAFC.WC.Y.0002.000000T0000Z-140213T2100Z/
/X.CAN.PAFC.WW.Y.0008.000000T0000Z-140213T2100Z/
NORTHEAST PRINCE WILLIAM SOUND-
INCLUDING THE CITIES OF...VALDEZ...THOMPSON PASS
1139 AM AKST THU FEB 13 2014

...WIND CHILL ADVISORY IS CANCELLED THROUGH THOMPSON PASS...
...WINTER WEATHER ADVISORY IS CANCELLED THROUGH THOMPSON PASS...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS CANCELLED THE
WINTER WEATHER ADVISORY. THE WIND CHILL ADVISORY HAS BEEN
CANCELLED. 

DECREASING WINDS...SLOWLY WARMING TEMPERATURES...AND LESS INTENSE
SNOWFALL HAVE ALLOWED CONDITIONS TO IMPROVE. SNOW SHOWERS AND
WIND CHILL VALUES IN EXCESS OF 30 BELOW WILL CONTINUE THROUGH
FRIDAY.

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
200 PM AKST TUE FEB 11 2014

.ANALYSIS AND UPPER LEVELS...
THE LONGWAVE PATTERN IS STABLE AND FEATURES A STRONG RIDGE OVER THE
BERING SEA AND A LONGWAVE TROUGH OVER THE GULF OF ALASKA AND
NORTHEAST PACIFIC. MAINLAND ALASKA REMAINS UNDER COLD AND DRY
NORTHERLY FLOW...WITH A WEAKENING UPPER-LEVEL SHORTWAVE CURRENTLY
BRINGING A THIN BAND OF HIGH CLOUDS FROM THE SUSITNA VALLEY
STRETCHING BACK THROUGH BRISTOL BAY. A LINGERING SURFACE LOW IN THE
GULF CONTINUES TO PULL RELATIVELY WEAK WINDS THROUGH THE FAVORED GAPS
ALONG THE COASTLINE. MEANWHILE...HIGH PRESSURE ALL THE WAY DOWN TO
THE SURFACE OVER MUCH OF THE BERING IS BRINGING UNSEASONABLY BENIGN
CONDITIONS TO MANY LOCATIONS.

.MODEL DISCUSSION...
MODELS ARE IN OUTSTANDING OVERALL AGREEMENT. ALL MODELS BRING THE
VIGOROUS UPPER LOW CURRENTLY APPROACHING THE NORTH SLOPE DOWN THROUGH
SOUTHWEST ALASKA THROUGH THE END OF THE WEEK. ACCOMPANYING THIS LOW
WILL BE ONE OF THE COLDEST AIRMASSES OF THE SEASON SO FAR. THERE ARE
SOME DIFFERENCES WITH THE EXACT POSITION OF THE SURFACE LOW THAT
DEVELOPS BENEATH THE UPPER LOW IN THE WESTERN GULF FOR THE 2ND HALF
OF THE WEEK. GIVEN THE FACT THAT THE UPPER LOW WILL BE HARDLY
MOVING...IT MAKES SENSE THAT THERE WILL BE MULTIPLE SURFACE LOWS
SPINNING UNDERNEATH THE PARENT UPPER LOW. THE EXACT POSITION OF THESE
CIRCULATION CENTERS WILL CONTROL WHETHER THE COOK INLET REGION GETS
ANY SNOW. AT THIS TIME THE NAM LOOKS TO BE A BIT FURTHER EAST WITH
THE UPPER CENTER THAN THE GEM/ECMWF/GFS CONSENSUS...AND WILL LEAN
SLIGHTLY AWAY FROM THE NAM FOR THIS REASON WITH PREPARATION OF THE
AFTERNOON FORECASTS.

.SHORT TERM FORECAST...
SOUTHCENTRAL...A FEW PASSING CLOUDS WILL BE THE ONLY IMPACT FROM THE
LEADING UPPER TROUGH CURRENTLY MOVING THROUGH THE REGION FROM NORTH
TO SOUTH. AS THE UPPER TROUGH DIGS SOUTHWARD ON WEDNESDAY FLOW WILL
BECOME MORE SOUTHERLY ACROSS MUCH OF THE AREA...LEADING TO INCREASING
CLOUDS AND SNOW DEVELOPING ALONG THE COAST BY WEDNESDAY AFTERNOON.
CONFIDENCE IS HIGH THAT COASTAL AREAS WILL SEE MULTIPLE PERIODS OF
GENERALLY LIGHT SNOWFALL BEGINNING WEDNESDAY NIGHT AND CONTINUING
THROUGH THE START OF THE WEEKEND. THE MORE UNCERTAIN FORECAST IS
WHETHER ANCHORAGE AND THE REST OF THE COOK INLET REGION WILL SEE MUCH
(IF ANY) SNOW AS THIS UPPER LOW REMAINS PARKED NEAR KODIAK ISLAND
DURING THE 2ND HALF OF THE WEEK. BASED ON CURRENT
GUIDANCE...SOUTHEASTERLY FLOW AROUND THE DEVELOPING LOW SHOULD BRING
SOME OVERRUNNING/WARM ADVECTION TO THE REGION BEGINNING WEDNESDAY
EVENING...WITH SURFACE LOW POSITION LIKELY MINIMIZING DOWNSLOPING AND
LEADING TO THE BEST CHANCE OF SNOW LATE WEDNESDAY NIGHT THROUGH
THURSDAY MORNING. WHILE ANY ACCUMULATION SHOULD BE MINOR...CONFIDENCE
IS NOW HIGH ENOUGH TO INCREASE POPS TO LIKELY LATE WEDNESDAY NIGHT
INTO THURSDAY. A TIGHTENING GRADIENT WILL ONCE AGAIN INCREASE WINDS
THROUGH THE GAPS AS THE SURFACE LOW DEVELOPS...WHICH MAY COMBINE WITH
LOW-DENSITY LIGHT TO MODERATE SNOWFALL TO CREATE SOME BLOWING SNOW
CONCERNS LATER THIS WEEK. WILL NEED TO MONITOR CLOSELY FOR POSSIBLE
HAZARD ISSUANCE IN SUBSEQUENT FORECAST PACKAGES...ESPECIALLY AROUND
THOMPSON PASS.

SOUTHWEST...THE BIGGEST IMPACT FROM THE UPPER LOW DROPPING INTO THE
REGION WILL BE THE ACCOMPANYING SURGE OF ARCTIC AIR. AS MENTIONED
ABOVE...THIS LOOKS TO RIVAL THE COLDEST TEMPERATURES OF THE SEASON SO
FAR WITH MANY AREAS SEEING TEMPERATURES IN THE DOUBLE DIGITS BELOW
ZERO. COMBINING WITH THESE TEMPERATURES WILL BE GUSTY NORTH
WINDS...WHICH WILL LIKELY DROP WIND CHILLS ACROSS THE MAINLAND TO
ADVISORY LEVELS. THUS WILL BE ISSUING WIND CHILL ADVISORIES FOR THE
WEDNESDAY NIGHT TO THURSDAY NIGHT PERIODS...WITH SLOW IMPROVEMENT
BEGINNING FRIDAY.

BERING SEA AND ALEUTIANS...HIGH PRESSURE WILL REMAIN GENERALLY IN
CONTROL THROUGH THE WEEKEND. A WEAK LOW PRESSURE CENTER WILL ELONGATE
AND SLIDE THROUGH THE CENTRAL BERING/ALEUTIANS ON
WEDNESDAY...BRINGING A BRIEF UPTICK TO WINDS AND SHOWER ACTIVITY.
ELSEWHERE...CONVECTIVE SNOW SHOWERS WILL DEVELOP OVER BRISTOL
BAY/EASTERN BERING SEA AS COLD AIR BEGINS A MASS MOVEMENT SOUTHWARD.
THIS WILL KEEP AREAS FROM DUTCH HARBOR EASTWARD IN STEADY SNOW
SHOWERS AND GUSTY WINDS BEGINNING THURSDAY AND CONTINUING THROUGH THE
WEEKEND.

.LONG TERM FORECAST FROM PREVIOUS DISCUSSION...
FORECAST CONFIDENCE REMAINS RELATIVELY HIGH INTO THE EXTENDED TERM AS
THE DEEP UPPER LOW DROPPING SOUTHWARD FROM THE ARCTIC LOOKS TO REMAIN
ENTRENCHED OVER THE WESTERN GULF OF ALASKA THROUGH THE MIDDLE OF NEXT
WEEK. THIS WOULD GENERALLY RESULT IN CONTINUED COLD TEMPERATURES AND
GUSTY OUTFLOW WINDS OVER THE SOUTHERN HALF OF THE MAINLAND...WITH THE
BEST CHANCE FOR PRECIPITATION REMAINING ALONG THE NORTHERN GULF
COAST. PRECIPITATION WILL ALSO BE POSSIBLE FOR INLAND PORTIONS OF
SOUTHCENTRAL AK DEPENDING ON THE EXACT POSITION OF THE LOW.
MEANWHILE...A MORE ACTIVE PATTERN LOOKS TO BE IN STORE FOR THE BERING
AS SEVERAL SYSTEMS MOVE THROUGH AND PROVIDE OCCASIONAL CHANCES FOR
PRECIPITATION.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...WIND CHILL ADVISORY 152 155 161
MARINE...GALE 127 130 131 132 150 160 165 175 176 177 180
         HEAVY FREEZING SPRAY 121 126 127 128 129 130 138 150 160 165
                              180 185
FIRE WEATHER...NONE

AMD/CC/CB FEB 14