Alert archive / Alaska / Blizzard Watches in 2017
Blizzard Watch 2, NWS Anchorage, AK
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 20, 3:34 PM AKST | Heavy Freezing Spray Warning | AFC | 60 hr | |
| Jan 20, 3:41 PM AKST | Gale Warning | AFC | 12 hr | |
| Jan 20, 3:41 PM AKST | Storm Warning | AFC | 12 hr | |
| Jan 20, 3:46 PM AKST | Gale Warning | AFC | 12 hr | |
| Jan 20, 3:46 PM AKST | Small Craft Advisory | AFC | 12 hr | |
| Jan 20, 3:46 PM AKST | Storm Warning | AFC | 48 hr | |
| Jan 20, 10:07 PM AKST | Small Craft Advisory | AFC | 6 hr | |
| Jan 21, 3:30 AM AKST | Brisk Wind Advisory | AFC | 12 hr | |
| Jan 21, 3:30 AM AKST | Gale Warning | AFC | 3 days | |
| Jan 21, 3:30 AM AKST | Hurricane Force Wind Warning | AFC | 48 hr | |
| Jan 21, 3:30 AM AKST | Hurricane Force Wind Warning | AFC | 48 hr | |
| Jan 21, 3:30 AM AKST | Small Craft Advisory | AFC | 12 hr | |
| Jan 21, 3:30 AM AKST | Storm Warning | AFC | 60 hr | |
| Jan 21, 3:30 AM AKST | Storm Warning | AFC | 60 hr | |
| Jan 21, 4:10 AM AKST | High Wind Watch | AFC | 12 hr | |
| Jan 21, 4:10 AM AKST | High Wind Warning | AFC | 6 hr | |
| Jan 21, 4:10 AM AKST | Winter Storm Watch | AFC | 25 hr | |
| Jan 21, 10:08 AM AKST | Blizzard Warning | AFC | 53 hr | |
| Jan 21, 10:08 AM AKST | Winter Storm Warning | AFC | 19 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.