Cold arctic air from northwest Canada moved into to the northern panhandle behind an arctic cold front to the northern panhandle through the 12th. A deep low 955mb move into the southwest Gulf of Alaska from the north Pacific Ocean.  The front approached the coast of Alaska but dissipated as it was moving onshore. A strong overrunning snow event to the northern half of the panhandle combined with a strong north outflow winds from Canada resulted in a multiple day winter storm event for the northern panhandle.

Heavy Snow in GLACIER BAY, ALASKA
From 10-JAN-10 23:00:00 to 12-JAN-10 06:30:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Gustavus coop observer reported a snow accumulation just under 6 inches the morning of the 11th. By the morning the 12th at 7 am AKST and additional 7 inches had fallen with another 6.2 by the morning of the 13th.  Storm total for the event in Gustavus was 18.9 inches.

Blizzard in TAIYA INLET AND KLONDIKE HIGHWAY, ALASKA
From 11-JAN-10 04:51:00 to 12-JAN-10 13:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Skagway Customs station reported blizzard conditions there and on the Klondike Highway.  Klondike Highway was closed briefly earlier due to avalanche of snow and rocks.

Heavy Snow in TAIYA INLET AND KLONDIKE HIGHWAY, ALASKA
From 11-JAN-10 10:00:00 to 12-JAN-10 08:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A Coop observer reported an accumulation of 10 inches of new snow at 7 am AKST the morning of the 12th.

Heavy Snow in JUNEAU BOROUGH AND NORTHERN ADMIRALTY ISLAND, ALASKA
From 12-JAN-10 23:00:00 to 13-JAN-10 11:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter in the Lemon Creek area reported a snowfall of 8 inches for a 12 hour period ending 10am AKST the 13th. A spotter at Tee Harbor and the Auke Bay coop reported a snowfall of 7 inches fro the snowfall. Several other stations reported roughly 6 inches of snow from this event. Colder coop station in interior valleys, like Canyon Island reported a snow fall of 11.1 inches at 8am AKST and Annex Creek Power station reported 13.2 inches at 6 pm.

Heavy Snow in HAINES BOROUGH AND LYNN CANAL, ALASKA
From 10-JAN-10 07:30:00 to 12-JAN-10 14:15:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Haines Coop observer reported the following snow totals at 8 am AKST on the 11th 18 inches, on the 12th 16 i nches, and 13th 5.2 (3 day total 39.2 inches).  Haines Custom station coop reported 8 inches the morning of the 12th (7 am AKST), and 6.5 inches.  Also a spotter near Haines report the morning of the 13th reported a total snowfall over the event of 47 inches.

Heavy Snow in SALISBURY SOUND TO CAPE FAIRWEATHER COASTAL AREA, ALASKA
From 11-JAN-10 10:00:00 to 12-JAN-10 11:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Elfin Cove coop observer reported a snowfall of 6.2 inches through 3 pm AKST the 11th, and an additional 4.2 by the afternoon of the 12th.

High Wind in DIXON ENTRANCE TO CAPE DECISION COASTAL AREA, ALASKA
From 10-JAN-10 09:30:00 to 10-JAN-10 19:00:00 (AKST-9)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Peak gust measured was at 936 am AKST on the 10th. Gusty winds continued into the early evening.

Heavy Snow in EASTERN CHICHAGOF ISLAND, ALASKA
From 10-JAN-10 19:00:00 to 12-JAN-10 06:30:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Hoonah coop observer reported a snow fall of 6.3 inches at 9am AKST the 11th, an additional 8.5 inches at 9 am AKST the 12th.

Heavy Snow in JUNEAU BOROUGH AND NORTHERN ADMIRALTY ISLAND, ALASKA
From 10-JAN-10 22:40:00 to 12-JAN-10 02:00:00 (AKST-9)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Juneau airport and the NWS Forecast Office picked up nearly 8 inches (7.7 and 8.0 respectively) by midnight the night of the 11th. In Douglas a NWS employee reported 8 inches by 3pm AKST the 11th and a total of 13 inches by 10am the 12th. A coop in Tee harbor reported a snow fall of 7 inches on the 11th.  Coop sites located in colder valleys near Juneau Canyon Island reported 19.8 inches  (24 hour totals at 8am AKST 8.7 on 11th and 11.1 the 12th) and Annex Creek Power Station 20.0 inches (at 6 pm AKST 11.0 on the 11th and 9.0 inches on the 12th).