A storm system moving northward from the North Pacific sent moisture associated with it over southern Alaska resulting in multiple precipitation type issues and hazardous weather. Arctic air already in place out ahead of the system remained entrenched at the surface. As warm air rode overtop the cold air at the surface, this resulted in precipitation type issues for certain areas.

Heavy Snow in COPPER RIVER BASIN, ALASKA
From 20-DEC-21 05:03:00 to 21-DEC-21 02:47:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

One of the people associated with the Department of Highways called the office to report 8 inches of new snow in Thompson Pass in the Copper River Basin.

Heavy Snow in MATANUSKA VALLEY, ALASKA
From 19-DEC-21 15:44:00 to 21-DEC-21 01:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters reported between 6 to 8 inches of snow throughout portions of the Matanuska Valley. The 511 Alaska page also reported very difficult road conditions from Big Lake to Sutton.

Winter Storm in KENAI PENINSULA, ALASKA
From 19-DEC-21 15:44:00 to 20-DEC-21 20:30:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Multiple reports came in across social media platforms. Most of them mentioned sleet and freezing rain occurring throughout the day on December 19th continuing into the 20th along the Sterling Highway from Kenai/Soldotna south to the Anchor Point area on the western Kenai Peninsula.

Winter Storm in LOWER KUSKOKWIM VALLEY, ALASKA
From 21-DEC-21 05:29:00 to 22-DEC-21 18:07:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Sparrevohn weather station in the Lower Kuskokwim Valley reported light freezing drizzle between 2:50 PM and 4 PM on December 22nd.

Winter Storm in KUSKOKWIM DELTA, ALASKA
From 21-DEC-21 05:29:00 to 22-DEC-21 09:01:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Bethel ASOS reported freezing rain between 2:52 am and 5:20 AM on December 22nd. ASOS ice sensors reported hourly ice accumulation up to 0.11 inches for the 3:53 am observation on December 22nd. The sensor then went down around 4:20 am but not before reporting another 0.02 inches from 3:53 am to 4:20 am. Trace amounts continued through 5:53 am. Bethel police department reported slushy conditions with problems walking or driving.

Winter Storm in BRISTOL BAY, ALASKA
From 21-DEC-21 05:29:00 to 22-DEC-21 15:07:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

King Salmon ASOS reported freezing rain between approximately 7:34 am to 8:20 am with an accumulation of 0.04 inches during this time before changing over to all rain.

Winter Storm in KENAI PENINSULA, ALASKA
From 22-DEC-21 11:30:00 to 22-DEC-21 18:05:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

As the storm system began to pull away, residual moisture on the back side resulted in some light frozen precipitation in and around the Homer on the 22nd of December. The Homer ASOS reported freezing rain mixed with snow during the afternoon resulting in a trace of ice accumulation.

Winter Storm in ANCHORAGE MUNI TO BIRD CREEK, ALASKA
From 19-DEC-21 15:44:00 to 21-DEC-21 01:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ted Stevens International Airport reported a period of freezing drizzle between 3-4 PM on the 20th of December. Some spotters in Eagle River called the office and reported between 6 and 8 inches of snow through early December 21st.