An extended period of snow and wind in association with a strong Pacific storm system brought heavy snow, strong winds and extreme cold which closed roads and brought widespread heavy snow.

Winter Storm in CARIBOU RANGE, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Swan Valley recorded 16 inches of snow.    Idaho route 34 closed on the 28th from Soda Springs to Wayan.

Winter Storm in CENTENNIAL MOUNTAINS-ISLAND PARK, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Ten inches of snow fell in Rea and 8 inches fell in Island Park.   The snow combined with strong winds closed Idaho Highway 87 from US Highway 20 to the Montana border, Us Highway 20 from Ashton to the Montana border and Idaho 47 east of Ashton.

Winter Storm in UPPER SNAKE RIVER PLAIN, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy snow fell with 8 inches in Shelley, 11 inches in Archer, 9 inches in Ammon, 6 inches in Rigby, and 12 inches in Sugar City.

Winter Weather in EASTERN MAGIC VALLEY, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Two to 4 inches of snow combined with 40 to 50 mph wind gusts for difficult driving conditions.

Winter Storm in LOWER SNAKE RIVER PLAIN, IDAHO
From 26-JAN-23 23:00:00 to 29-JAN-23 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Six inches of snow fell in Fort Hall with amounts in the 2 to 4 inch range from American Falls through Pocatello.

Winter Storm in BIG HOLE MOUNTAINS, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two feet of snow was measured 4 miles west of Victor.

Winter Storm in TETON VALLEY, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Snowfall amounts were 14 inches 4 miles southeast of Judkins, 13 inches in Ashton, and 10 inches in Squirrel.   Road closures due to heavy snow and strong winds were US Highway 20 from Ashton to the Montana border, Idaho Route 47 from Ashton to Warm River, and Idaho Highways 32 and 33 closed as well.

Winter Storm in BEAVERHEAD-LEMHI HIGHLANDS, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Generally light snow fell with 1 inch in Dubois and 4 inches in Small, but strong northerly winds caused extensive blowing snow.  Interstate 15 shut down on the 29th from Dubois to the Montana border.   Idaho 22 was closed from Idaho 33 to Dubois, and Idaho 28 was closed from Idaho 22 to Lemhi County.   50 to 70 mph wind gusts were common on the 28th and 29th with 68 mph 4 miles south of Spencer the maximum recorded.

Winter Weather in RAFT RIVER REGION, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Nine inches of snow fell 11 miles southeast of Rockland and 8 inches fell in Roy with 40 to 60 mph wind gusts widespread.

Winter Storm in BEAR LAKE VALLEY, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

COOP obvservers measured 3 inches of snow in Lake Charles and 9.5 inches in Bern.

Winter Storm in BLACKFOOT MOUNTAINS, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snow amounts were 10 inches in Wayan, 6 inches in Bone, and 8.5 inches in Soda Springs.  Snow and wind closed down Idaho Route 34 from Soda Springs to Wayan on the 28th.

Winter Storm in MARSH AND ARBON HIGHLANDS, IDAHO
From 26-JAN-23 22:00:00 to 29-JAN-23 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Some of the heavy snow amounts were 11 inches in McCammon, 8 inches in Downey, 23 inches 3 miles north northwest of Lava Hot Springs, and 16 to 20 inches in the Inkom area.