A deep vertically stacked low that made it's way from the Bristol Bay area to the Gulf of Alaska. Across southcentral, a strong front along the leading edge of the system brought moderate to heavy snowfall and areas of mixed precipitation in areas affected by down-sloping winds. The backside of the low however brought winds, frigid and blizzard conditions along the southwest.

Blizzard in PRIBILOF ISLANDS, ALASKA
From 11-DEC-21 16:20:00 to 13-DEC-21 08:03:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Saint Paul WSO reported 8.7 inch drifts at the door and 3 ft drifts in the driveway.

Extreme Cold/Wind Chill in NERN P.W. SND, ALASKA
From 12-DEC-21 21:11:00 to 13-DEC-21 13:07:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Wind chill at the FAA camera tower at Thompson Pass was -43F at time of issuance. Wind chill values ranged between -38 and -44 through duration of warning. Wind chill values dropped back to -35 around 1300 on the 13th.

Cold/Wind Chill in KUSKOKWIM DELTA, ALASKA
From 13-DEC-21 19:09:00 to 14-DEC-21 15:44:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind chills of -40F recorded for several hours at Bethel Airport with winds 15 mph or greater.

Blizzard in NERN P.W. SND, ALASKA
From 14-DEC-21 04:51:00 to 14-DEC-21 15:26:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thompson Pass DOT official reported blizzard conditions overnight the 13th through the morning of the 14th.

Winter Weather in KUSKOKWIM DELTA, ALASKA
From 14-DEC-21 15:44:00 to 15-DEC-21 21:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Observations at Hooper Bay, Toksook, and Chevak each recorded 3 hr of vis 1/2 mile or less and winds greater than 25 mph.

Winter Weather in BRISTOL BAY, ALASKA
From 14-DEC-21 15:44:00 to 16-DEC-21 12:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts of 5-6 reported by worker at Radio Station KDLG in Dillingham.

Cold/Wind Chill in NERN P.W. SND, ALASKA
From 14-DEC-21 18:10:00 to 16-DEC-21 01:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Multiple stations along the road near Thompson Pass recorded wind chills of -40 degrees or colder. A few stations went offline during the period, likely due to the cold conditions; they came back when it began to warm.

High Wind in KODIAK PENINSULA, ALASKA
From 10-DEC-21 15:55:00 to 12-DEC-21 08:32:00 (AKST-9)
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Akhiok recorded winds at 55G75 mph on 12/11 at 6:56AM. Kodiak recorded winds at 53G74mph 12/10 at 11:53PM and the Kodiak Port recorded 18G61 mph 12/11 at 1:06AM Additionally, the RAWS station at FourPeaked observed winds 86G103 mph on 12/11 at 1:17AM and the Kodiak Gull Island Marine Exchange observation noted 93 mph winds at 12:12AM on 12/11.

Blizzard in ALASKA PENINSULA, ALASKA
From 10-DEC-21 19:17:00 to 11-DEC-21 03:31:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

This was a missed event. Sand Point reported +SN and BLSN with vis < 1/4 sm for 3 hours preceding the issuance of the blizzard warning. Visibilities were recorded as low as 0SM. An SPS had been issued for blowing snow and reduced visibility at 3:30 PM. Additionally, King Cove recorded 1/2SM vis and gusts >= 51 mph on 12/10 from 7:24-8:35 PM.