Alert archive / Alaska / Blizzard Watches in 2017

Blizzard Watch 2, NWS Anchorage, AK

January 21, 2017

NWS Anchorage, AK issued this blizzard watch at Jan 21, 2017, 4:10 AM AKST. It took effect at Jan 22, 2017, 3:00 PM AKST. It was in force for .

The area

The counties it named.

The facts

Issued
Jan 21, 2017, 4:10 AM AKST (13:10 UTC)
In effect from
Jan 22, 2017, 3:00 PM AKST
Expired
Jan 21, 2017, 4:17 PM AKST
In force
Issued by
NWS Anchorage, AK

The text

As transmitted.

570 
WWAK42 PAFC 211310
WSWALU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
410 AM AKST SAT JAN 21 2017

AKZ195-220300-
/O.NEW.PAFC.BZ.A.0002.170123T0000Z-170124T0000Z/
PRIBILOF ISLANDS-
INCLUDING THE CITY OF...SAINT PAUL
410 AM AKST SAT JAN 21 2017

...BLIZZARD WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A BLIZZARD
WATCH...WHICH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON. 

* LOCATION...PRIBILOF ISLANDS.

* SNOW...3 TO 6 INCHES.

* VISIBILITY...POSSIBLY REDUCED TO ONE QUARTER MILE OR LESS AT
  TIMES.

* WIND...45 TO 60 MPH WITH GUSTS AS HIGH AS 70 MPH.

* TIMING...PERIODS OF MODERATE TO HEAVY SNOWFALL WILL BEGIN SUNDAY
  AFTERNOON AS A FRONT SWINGS NORTH NEAR THE PRIBILOF ISLANDS. AT
  THE SAME TIME...STRONG AND GUSTY WINDS WILL ACCOMPANY THE
  AFOREMENTIONED SNOWFALL WHICH COULD LEAD TO WHITE-OUT CONDITIONS
  ACROSS THE PRIBILOF ISLANDS. THESE CONDITIONS WILL PERSIST
  THROUGH MONDAY AFTERNOON BEFORE SNOWFALL BEGINS TO TAPER OFF AND
  WINDS BEGIN TO WEAKEN.

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  MAY PRODUCE WHITE-OUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WATCH MEANS THERE IS A POTENTIAL FOR FALLING AND/OR
BLOWING SNOW WITH STRONG WINDS AND EXTREMELY POOR VISIBILITIES.
THIS CAN LEAD TO WHITE-OUT CONDITIONS AND MAKE TRAVEL VERY
DIFFICULT.

&&

$$

AKZ181-220300-
/O.NEW.PAFC.WS.A.0001.170122T2200Z-170123T0900Z/
ALASKA PENINSULA-
INCLUDING THE CITIES OF...COLD BAY...SAND POINT
410 AM AKST SAT JAN 21 2017

...WINTER STORM WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH
SUNDAY EVENING...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH
SUNDAY EVENING. 

* LOCATION...ALASKA PENINSULA.

* SNOW...3 TO 6 INCHES WITH UP TO A FOOT POSSIBLE FOR UPSLOPE
  LOCATIONS ON THE PACIFIC SIDE OF THE PENINSULA.

* VISIBILITY...POSSIBLY REDUCED TO ONE HALF MILE OR LESS AT TIMES.

* WIND...45 TO 55 MPH WITH GUSTS AS HIGH AS 70 MPH.

* TIMING...SNOWFALL WILL BEGIN OVER THE WESTERN TIP OF THE ALASKA
  PENINSULA SUNDAY AFTERNOON AND SPREAD EASTWARD THROUGH SUNDAY
  EVENING. STRONG WINDS WILL ACCOMPANY THE SNOWFALL AND BRING
  BLOWING SNOW CONDITIONS TO THE ALASKA PENINSULA. SNOWFALL WILL
  CHANGE TO RAIN OVER THE WESTERN TIP OF THE PENINSULA LATE SUNDAY
  EVENING AND SPREAD EASTWARD AS A FRONT MOVES ACROSS THE PENINSULA.

* IMPACTS...TRAVEL MAY BE DIFFICULT. VISIBILITIES WILL BE LIMITED
  IN FALLING AND BLOWING SNOW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATION THAT MAY IMPACT TRAVEL. PEOPLE ARE ENCOURAGED
TO CLOSELY MONITOR THIS WEATHER SITUATION. PREPARATION FOR THIS
POTENTIALLY DANGEROUS WEATHER EVENT SHOULD BEGIN NOW.

&&

$$
2 follow-up statements
948 
WWAK42 PAFC 211908
WSWALU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
1008 AM AKST SAT JAN 21 2017

AKZ191-220815-
/O.NEW.PAFC.BZ.W.0003.170122T0900Z-170123T0100Z/
WESTERN ALEUTIANS-
INCLUDING THE CITY OF...SHEMYA AND AMCHITKA
1008 AM AKST SAT JAN 21 2017

...BLIZZARD WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 4 PM AKST
SUNDAY FOR SHEMYA...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 4 PM AKST
SUNDAY. 

* LOCATION...SHEMYA.

* SNOW...4 TO 7 INCHES ACCUMULATION.

* VISIBILITY...ONE QUARTER MILE OR LESS AT TIMES.

* WIND...NORTHEAST 40 TO 55 MPH WITH GUSTS TO 70 MPH.

* TIMING...WINDS WILL STEADILY STRENGTHEN THROUGH THIS EVENING
  THEN PEAK OVERNIGHT THROUGH SUNDAY MORNING BEFORE GRADUALLY
  DIMINISHING SUNDAY AFTERNOON. LIGHT SNOW WILL FALL FOR MUCH OF
  TODAY THEN INTENSIFY OVERNIGHT TONIGHT AND PERSIST THROUGH
  SUNDAY AFTERNOON.  

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  WILL PRODUCE WHITE-OUT CONDITIONS. DRIVING WILL BE VERY
  DIFFICULT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITE-OUT
CONDITIONS, MAKING TRAVEL VERY DIFFICULT. ALL TRAVEL AND OUTDOOR
ACTIVITY IS STRONGLY DISCOURAGED.

&&

$$

AKZ187-220815-
/O.NEW.PAFC.WS.W.0001.170122T0300Z-170122T1400Z/
CENTRAL ALEUTIANS-
INCLUDING THE CITY OF...ATKA AND ADAK
1008 AM AKST SAT JAN 21 2017

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 5 AM
AKST SUNDAY...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A WINTER
STORM WARNING FOR BLOWING SNOW AND HIGH WINDS...WHICH IS IN
EFFECT FROM 6 PM THIS EVENING TO 5 AM AKST SUNDAY.

* SNOW...2 TO 4 INCHES.

* VISIBILITY...AS LOW AS ONE QUARTER MILE AT TIMES.

* WIND...EAST 45 TO 60 WITH GUSTS TO 75 MPH.

* TIMING...WINDS WILL INCREASE THROUGH THE DAY THEN PEAK LATE THIS
  EVENING THROUGH EARLY SUNDAY MORNING. SNOW WILL DEVELOP NEAR
  ADAK LATE THIS AFTERNOON THEN SPREAD ATKA. BLOWING SNOW AND LOW
  VISIBILITIES WILL BE WORST THIS EVENING WITH IMPROVING
  CONDITIONS OVERNIGHT AS TEMPERATURES RISE ABOVE FREEZING.

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  WILL PRODUCE WHITE-OUT CONDITIONS. HIGH WINDS MAY MOVE LOOSE
  DEBRIS AND MAY DAMAGE PROPERTY. DRIVING WILL BE VERY DIFFICULT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW, SLEET,
AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE.
THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

AKZ195-220815-
/O.CON.PAFC.BZ.A.0002.170123T0000Z-170124T0000Z/
PRIBILOF ISLANDS-
INCLUDING THE CITY OF...SAINT PAUL
1008 AM AKST SAT JAN 21 2017

...BLIZZARD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH
MONDAY AFTERNOON...

* LOCATION...PRIBILOF ISLANDS.

* SNOW...3 TO 6 INCHES.

* VISIBILITY...POSSIBLY REDUCED TO ONE QUARTER MILE OR LESS AT 
  TIMES. 

* WIND...45 TO 60 MPH WITH GUSTS AS HIGH AS 70 MPH.

* TIMING...PERIODS OF MODERATE TO HEAVY SNOWFALL WILL BEGIN 
  SUNDAY AFTERNOON AS A FRONT SWINGS NORTH NEAR THE PRIBILOF 
  ISLANDS. AT THE SAME TIME...STRONG AND GUSTY WINDS WILL 
  ACCOMPANY THE AFOREMENTIONED SNOWFALL WHICH COULD LEAD TO 
  WHITE- OUT CONDITIONS ACROSS THE PRIBILOF ISLANDS. THESE 
  CONDITIONS WILL PERSIST THROUGH MONDAY AFTERNOON BEFORE 
  SNOWFALL BEGINS TO TAPER OFF AND WINDS BEGIN TO WEAKEN. 

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW 
  MAY PRODUCE WHITE-OUT CONDITIONS AT TIMES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WATCH MEANS THERE IS A POTENTIAL FOR FALLING AND/OR
BLOWING SNOW WITH STRONG WINDS AND EXTREMELY POOR VISIBILITIES.
THIS CAN LEAD TO WHITE-OUT CONDITIONS AND MAKE TRAVEL VERY
DIFFICULT.

&&

$$

AKZ181-220815-
/O.CON.PAFC.WS.A.0001.170122T2200Z-170123T0900Z/
ALASKA PENINSULA-
INCLUDING THE CITIES OF...COLD BAY...SAND POINT
1008 AM AKST SAT JAN 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH SUNDAY EVENING...

* LOCATION...ALASKA PENINSULA.

* SNOW...3 TO 6 INCHES WITH UP TO A FOOT POSSIBLE FOR UPSLOPE 
  LOCATIONS ON THE PACIFIC SIDE OF THE PENINSULA. 

* VISIBILITY...POSSIBLY REDUCED TO ONE HALF MILE OR LESS AT 
  TIMES.

* WIND...45 TO 55 MPH WITH GUSTS AS HIGH AS 70 MPH.

* TIMING...SNOWFALL WILL BEGIN OVER THE WESTERN TIP OF THE 
  ALASKA PENINSULA SUNDAY AFTERNOON AND SPREAD EASTWARD THROUGH 
  SUNDAY EVENING. STRONG WINDS WILL ACCOMPANY THE SNOWFALL AND 
  BRING BLOWING SNOW CONDITIONS TO THE ALASKA PENINSULA. 
  SNOWFALL WILL CHANGE TO RAIN OVER THE WESTERN TIP OF THE 
  PENINSULA LATE SUNDAY EVENING AND SPREAD EASTWARD AS A FRONT 
  MOVES ACROSS THE PENINSULA. 

* IMPACTS...TRAVEL MAY BE DIFFICULT. VISIBILITIES WILL BE 
  LIMITED IN FALLING AND BLOWING SNOW 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATION THAT MAY IMPACT TRAVEL. PEOPLE ARE ENCOURAGED
TO CLOSELY MONITOR THIS WEATHER SITUATION. PREPARATION FOR THIS
POTENTIALLY DANGEROUS WEATHER EVENT SHOULD BEGIN NOW.

&&

$$
585 
WWAK42 PAFC 220117
WSWALU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
417 PM AKST SAT JAN 21 2017

AKZ195-221430-
/O.UPG.PAFC.BZ.A.0002.170123T0000Z-170124T0000Z/
/O.EXB.PAFC.BZ.W.0003.170123T0000Z-170124T0000Z/
PRIBILOF ISLANDS-
INCLUDING THE CITY OF...SAINT PAUL
417 PM AKST SAT JAN 21 2017

...BLIZZARD WARNING IN EFFECT FROM 3 PM SUNDAY TO 3 PM AKST
MONDAY...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT FROM 3 PM SUNDAY TO 3 PM AKST
MONDAY. THE BLIZZARD WATCH IS NO LONGER IN EFFECT. 

* LOCATION...PRIBILOF ISLANDS.

* SNOW...3 TO 6 INCHES.

* VISIBILITY...ONE QUARTER MILE OR LESS AT TIMES.

* WIND...EAST TO NORTHEAST 45 TO 60 MPH WITH GUSTS AS HIGH AS 70
  MPH.

* TIMING...MODERATE TO HEAVY SNOWFALL AND STRONG EAST TO NORTHEAST
  WINDS WILL LEAD TO WHITE-OUT CONDITIONS BEGINNING SUNDAY
  AFTERNOON AS A STRONG FRONT MOVES OVER THE PRIBILOF ISLANDS.
  CONDITIONS WILL BEGIN TO IMPROVE AT SAINT GEORGE BY EARLY MONDAY
  MORNING AS WARMER AIR ARRIVES AND CHANGES PRECIPITATION TO
  RAIN...HOWEVER BLIZZARD CONDITIONS WILL PERSIST AT SAINT PAUL
  THROUGH MONDAY AFTERNOON BEFORE PRECIPITATION DIMINISHES IN
  INTENSITY AND WINDS BEGIN TO WEAKEN.

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  WILL PRODUCE WHITE-OUT CONDITIONS. TRAVEL WILL BE VERY
  DIFFICULT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITE-OUT
CONDITIONS, MAKING TRAVEL VERY DIFFICULT. ALL TRAVEL AND OUTDOOR
ACTIVITY IS STRONGLY DISCOURAGED.

&&

$$

AKZ185-221430-
/O.EXB.PAFC.BZ.W.0003.170122T1500Z-170123T0100Z/
EASTERN ALEUTIANS-
INCLUDING THE CITIES OF...UNALASKA...NIKOLSKI
417 PM AKST SAT JAN 21 2017

...BLIZZARD WARNING IN EFFECT FROM 6 AM TO 4 PM AKST SUNDAY...

THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT FROM 6 AM TO 4 PM AKST SUNDAY. 

* LOCATION...EASTERN ALEUTIANS.

* SNOW...3 TO 6 INCHES ACCUMULATION.

* VISIBILITY...ONE QUARTER MILE OR LESS AT TIMES.

* WIND...EAST 45 TO 60 MPH WITH GUSTS TO 80 MPH.

* TIMING...STRONG WINDS AND HEAVY PRECIPITATION WILL SPREAD
  EASTWARD FROM NIKOLSKI TOWARDS UNALASKA SUNDAY MORNING AS STRONG
  FRONT MOVES OVER THE EASTERN ALEUTIANS. PRECIPITATION IS
  EXPECTED TO CHANGE FROM SNOW TO RAIN RELATIVELY QUICKLY AT
  NIKOLSKI DURING THE MORNING...HOWEVER HEAVY SNOW AND STRONG
  WINDS ARE EXPECTED TO CREATE WHITE-OUT CONDITIONS PERSISTING
  INTO THE AFTERNOON FROM UNALASKA EASTWARD. CONDITIONS WILL
  IMPROVE DURING THE EVENING AS WINDS BEGIN TO WEAKEN AND SNOW
  CHANGES OVER TO RAIN.

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  WILL PRODUCE WHITE-OUT CONDITIONS. TRAVEL WILL BE VERY
  DIFFICULT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITE-OUT
CONDITIONS... MAKING TRAVEL VERY DIFFICULT. ALL TRAVEL AND
OUTDOOR ACTIVITY IS STRONGLY DISCOURAGED.

&&

$$

AKZ191-221430-
/O.CON.PAFC.BZ.W.0003.170122T0900Z-170123T0100Z/
WESTERN ALEUTIANS-
INCLUDING THE CITY OF...SHEMYA AND AMCHITKA
417 PM AKST SAT JAN 21 2017

...BLIZZARD WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
4 PM AKST SUNDAY...

* LOCATION...SHEMYA.

* SNOW...4 TO 7 INCHES ACCUMULATION.

* VISIBILITY...ONE QUARTER MILE OR LESS AT TIMES.

* WIND...NORTHEAST 40 TO 55 MPH WITH GUSTS TO 70 MPH.

* TIMING...WINDS WILL STEADILY STRENGTHEN THROUGH THIS EVENING 
  THEN PEAK OVERNIGHT THROUGH SUNDAY MORNING BEFORE GRADUALLY 
  DIMINISHING SUNDAY AFTERNOON. LIGHT SNOW WILL FALL FOR MUCH OF 
  TODAY THEN INTENSIFY OVERNIGHT TONIGHT AND PERSIST THROUGH 
  SUNDAY AFTERNOON. 

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW 
  WILL PRODUCE WHITE-OUT CONDITIONS. DRIVING WILL BE VERY 
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITE-OUT
CONDITIONS... MAKING TRAVEL VERY DIFFICULT. ALL TRAVEL AND
OUTDOOR ACTIVITY IS STRONGLY DISCOURAGED.

&&

$$

AKZ187-221400-
/O.CON.PAFC.WS.W.0001.170122T0300Z-170122T1400Z/
CENTRAL ALEUTIANS-
INCLUDING THE CITY OF...ATKA AND ADAK
417 PM AKST SAT JAN 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM AKST
SUNDAY...

* SNOW...2 TO 4 INCHES.

* VISIBILITY...AS LOW AS ONE QUARTER MILE AT TIMES.

* WIND...EAST 45 TO 60 WITH GUSTS TO 75 MPH.

* TIMING...WINDS WILL PEAK LATE THIS EVENING THROUGH EARLY SUNDAY
  MORNING. SNOW DEVELOPING NEAR ADAK THIS EVENING WILL SPREAD
  TOWARDS ATKA OVERNIGHT. BLOWING SNOW AND LOW VISIBILITIES WILL
  BE WORST THIS EVENING WITH IMPROVING CONDITIONS OVERNIGHT AS
  TEMPERATURES RISE ABOVE FREEZING AND RAIN MIXES IN WITH THE SNOW.

* IMPACTS...SNOWFALL COMBINED WITH STRONG WINDS AND BLOWING SNOW
  WILL PRODUCE WHITE-OUT CONDITIONS. HIGH WINDS MAY MOVE LOOSE
  DEBRIS AND MAY DAMAGE PROPERTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVEL WILL BE DIFFICULT. VISIBILITIES WILL BE LIMITED IN FALLING
AND BLOWING SNOW.

&&

$$

AKZ181-221430-
/O.CON.PAFC.WS.A.0001.170122T2200Z-170123T0900Z/
ALASKA PENINSULA-
INCLUDING THE CITIES OF...COLD BAY...SAND POINT
417 PM AKST SAT JAN 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH SUNDAY EVENING...

* LOCATION...ALASKA PENINSULA.

* SNOW...3 TO 6 INCHES WITH UP TO A FOOT POSSIBLE FOR UPSLOPE 
  LOCATIONS ON THE PACIFIC SIDE OF THE PENINSULA. 

* VISIBILITY...POSSIBLY REDUCED TO ONE HALF MILE OR LESS AT 
  TIMES. 

* WIND...45 TO 55 MPH WITH GUSTS AS HIGH AS 70 MPH.

* TIMING...SNOWFALL WILL BEGIN OVER THE WESTERN TIP OF THE 
  ALASKA PENINSULA SUNDAY AFTERNOON AND SPREAD EASTWARD THROUGH 
  SUNDAY EVENING. STRONG WINDS WILL ACCOMPANY THE SNOWFALL AND 
  BRING BLOWING SNOW CONDITIONS TO THE ALASKA PENINSULA. 
  SNOWFALL WILL CHANGE TO RAIN OVER THE WESTERN TIP OF THE 
  PENINSULA LATE SUNDAY EVENING AND SPREAD EASTWARD AS A FRONT 
  MOVES ACROSS THE PENINSULA. 

* IMPACTS...TRAVEL MAY BE DIFFICULT. VISIBILITIES WILL BE 
  LIMITED IN FALLING AND BLOWING SNOW 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATION THAT MAY IMPACT TRAVEL. PEOPLE ARE ENCOURAGED
TO CLOSELY MONITOR THIS WEATHER SITUATION. PREPARATION FOR THIS
POTENTIALLY DANGEROUS WEATHER EVENT SHOULD BEGIN NOW.

&&

$$

What forecasters said that day

The local office's own words before this blizzard watch 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 blizzard watch went out at Jan 20, 4:32 PM AKST, 11 hours 38 minutes earlier.

Area forecast discussion, Jan 20, 4:32 PM AKST, 11 hours 38 minutes before
Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
432 PM AKST Fri Jan 20 2017

.ANALYSIS AND UPPER LEVELS...
A broad upper level trough extending across Western Alaska from a
closed low over the North Slope is beginning to slowly lift to the
north and east this afternoon. A front is entering the Cook Inlet
region, bringing snow to portions of the Kenai Peninsula and
setting the stage for another round of snowfall for Anchorage and
the Matanuska Valley this evening into tonight. Meanwhile, a very
cold arctic air mass is once again filtering into the southwest
mainland on the backside of the trough as precipitation moves east
of the Alaska Range. Convective snow showers continue in broad
cold air advection across a large swath of the Bering as a weak
North Pacific front approaches the Western Aleutians.

&&

.MODEL DISCUSSION...
Models are in reasonably good synoptic agreement through the short
term as the trough lifts to the northeast across the mainland and
the strong front enters the Aleutians later this weekend ahead of
an intensifying North Pacific low. 18z runs have also come into
slightly better agreement regarding some of the smaller scale
details regarding the snowfall set to impact Anchorage and Mat-
Su regions tonight, however there is still some uncertainty with
respect to the strength and duration of main snow band and how
quickly snow will taper off on Saturday, which will have large
implications on snow amounts. Primarily utilized the NAM for the
afternoon package.

&&

.AVIATION...
PANC...The snow will drop prevailing conditions to MVFR through
Saturday morning with periods of IFR conditions as the snow
fluctuates in intensity. The main snow band will dissipate by
Saturday morning, but scattered snow showers and MVFR conditions
look to persist through Saturday afternoon.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...

The front that crossed the Aleutian Range is beginning to stall
across the Kenai Peninsula, the Anchorage Bowl and Matanuska
Valley, extending north into the Susitna Valley. Snowfall will
stream north across this region overnight, with up to one foot
expected along the Seward highway through the Kenai peninsula.
Generally amounts up to 6 inches are expected tonight over
Anchorage and the Matanuska Valley and the Susitna Valley east of
the Parks highway. As the front weakens in place on Sat, snow
showers will provide an additional 2 inches of snow over the
region. On Sun the upper trough finally passes over Southcentral
with a last round of snow shower activity.

Areas from Prince William Sound to the north and east will remain
fairly dry through the weekend, with continued cold temperatures
inland. The area with snowfall will experience warmer
temperatures on southerly flow.

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2...Sat and Sun)...
Very cold temperatures will settle over the area again tonight
into Saturday. The trough from the Bering that brought snow and
blowing snow to the region is slowly moving off to the east. Light
snow continues along the Aleutian range and in parts of Bristol
Bay, but even that should end through the evening hours. In the
wake of the trough, another plunge of arctic air is diving down
from the Chukchi Sea. Saturday will be a relatively quiet day
with dry, calm conditions and some patchy fog in the valleys. A
strong system over the Bering will allow an induced ridge to build
over southwest AK on Sunday. This will keep conditions dry and
allow temperatures to modify a little as flow starts to shift to
southeasterly.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2...Sat and
Sun)...
Cold air advection snow showers will continue across most of the
Bering and from the Central Aleutians eastward through much of
Sat. Some of these showers will bring periods of heavy snow and
gusty winds causing reduced visibility. Over the Western Bering,
an initial warm front will move in tonight with increasing
southeast winds and some light snow, possibly mixed with rain at
times. Then we shift our attention to the next strong low that
will move towards the Central Aleutians from the North Pacific.

The first impact from this will be strong east to southeast winds
from Adak to Dutch Harbor late Sat night into mid-day Sunday.
Right now it looks like winds will top out in the 65-70 mph range,
but we will be watching how it develops. A bit more cold air or
upper level support and we might see things get close to warning
level. Beyond that, conditions look to be setting up well for snow
and blowing snow conditions over the Pribilofs later Sun. Cold air
will remain in place and east to northeast flow is a very
favorable set-up for reduced visibilities at the islands. We will
also watch this to make sure the storm track remains consistent on
the next few models.

&&

.LONG TERM FORECAST (Days 3 through 7)...
An upper level closed low is centered over the Central Aleutians
starting out next week. As this feature moves eastward the strong
meridional south to north jet streak tracks into the Southeast
Panhandle by Tuesday. This pattern continues through the the next
weekend as the longwave trough moves farther eastward. Meanwhile,
look for a warming trend with the southerly flow into the Gulf
extending through the Southcentral Alaska region. Therefore, the
temperatures in the aforementioned region rises above freezing due
from the warm air advection. This results in more moisture
streaming into the AOR with a wintry mix along the coastal
communities as the warmer temperature filter into the region.
While the interior sets up with a better scenario for moderate
snowfall in favored mountain regions. Meanwhile, the models are
struggling some with the complex low developing in the North
Pacific Ocean before tracking towards the Central Aleutians by
Monday. This system will bring warmer temperatures along the
Aleutian Chain, and the lower Bering. While the rest of the
Bering is influenced by easterly to northeasterly flow through
majority of next week. Since the jet stream remains south of the
Aleutian Chain the storm systems will continue to track along the
Chain before entering the Gulf of Alaska. The forecast confidence
remains average through next week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Gale 150 170 172.
Storm 173-178.
Heavy Freezing Spray 127 130 138 160 165 180 185.

&&

SYNOPSIS AND MODEL DISCUSSION...CB
SOUTHCENTRAL ALASKA...DS
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...MO
LONG TERM...PD

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 20, 3:34 PM AKSTHeavy Freezing Spray WarningAFC60 hr
Jan 20, 3:41 PM AKSTGale WarningAFC12 hr
Jan 20, 3:41 PM AKSTStorm WarningAFC12 hr
Jan 20, 3:46 PM AKSTGale WarningAFC12 hr
Jan 20, 3:46 PM AKSTSmall Craft AdvisoryAFC12 hr
Jan 20, 3:46 PM AKSTStorm WarningAFC48 hr
Jan 20, 10:07 PM AKSTSmall Craft AdvisoryAFC6 hr
Jan 21, 3:30 AM AKSTBrisk Wind AdvisoryAFC12 hr
Jan 21, 3:30 AM AKSTGale WarningAFC3 days
Jan 21, 3:30 AM AKSTHurricane Force Wind WarningAFC48 hr
Jan 21, 3:30 AM AKSTHurricane Force Wind WarningAFC48 hr
Jan 21, 3:30 AM AKSTSmall Craft AdvisoryAFC12 hr
Jan 21, 3:30 AM AKSTStorm WarningAFC60 hr
Jan 21, 3:30 AM AKSTStorm WarningAFC60 hr
Jan 21, 4:10 AM AKSTHigh Wind WatchAFC12 hr
Jan 21, 4:10 AM AKSTHigh Wind WarningAFC6 hr
Jan 21, 4:10 AM AKSTWinter Storm WatchAFC25 hr
Jan 21, 10:08 AM AKSTBlizzard WarningAFC53 hr
Jan 21, 10:08 AM AKSTWinter Storm WarningAFC19 hr

Nearby

Blizzard Watches in Alaska, 2017Every blizzard watch in 2017

Sources

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