Massive amounts of Pacific moisture infiltrated the mountains of southeast Idaho after a relatively dry winter to that point.   A large number of SNOTEL sites recorded over a foot of snow with as much ast 70 inches reported across the region.   3 to 6 foot amounts were common.

Heavy Snow in SAWTOOTH MOUNTAINS, IDAHO
From 17-JAN-12 20:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell above 7000 feet in the Sawtooth region.   50 inches fell at Mill Creek Summit with 14 inches at Smiley Mountain, 10 inches at Stickney Mill, and 15 inches at Bear Canyon.

Heavy Snow in UPPER SNAKE HIGHLANDS, IDAHO
From 17-JAN-12 20:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow and wind affectd the Upper Snake Highlands for several days which closed roads as well as schools.   28 inches of snow was recoreded at White Elephant with 10 inches at Island Park.   Teton, Idaho school district 401 was closed on January 19th due to road conditions.  Visibility dropped to near zero on US Highway 20 on the 18th causing a severe traffic accident blocking traffic for 3 hours.   Idaho route 33 was closed from Newdale to Tetonia on January 19th.   Idaho Highway 32 was closed between Tetonia and Ashton due to snow.

Heavy Snow in SOUTH CENTRAL HIGHLANDS, IDAHO
From 17-JAN-12 20:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Extremely heavy snow amounts occurred in the South Central Highlands.   55 inches fell at Magic Mountain with 23 inches at Oxford Springs, 54 inches at Bostetter Ranger Station, and 58 inches at Howell Canyon.

Heavy Snow in CARIBOU HIGHLANDS, IDAHO
From 17-JAN-12 20:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Several days of heavy snow occurred in the Caribou Highlands with SNOTEL sites recording extreme amounts.   Totals were 29 inches at Pine Creek Pass, 25 inches at Sedgwick Peak, 18 inches at Somsen Ranch, 9 inches at Sheep Mountain, and 10 inches at Wildhorse Divide.

Heavy Snow in WASATCH MOUNTAINS/IADHO PORTION, IDAHO
From 17-JAN-12 21:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell for more than two days in the Idaho Wasatch.   17 inches fell at Slug Creek Divide with 28 inches at Emigrant Summit, and 17 inches at Giveout.

Heavy Snow in BIG AND LITTLE WOOD RIVER REGION, IDAHO
From 17-JAN-12 19:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

A multiple day winter storm brought incredible snow amounts to the Big and Little Wood River Region.   An amazing 77 inches was recorded at Vienna Mine with 22 inches at Swede Peak, 34 inches at Lost Wood Divide, 22 inches at Chocolate Gulch, 17 inches at Garfield Ranger Station, 41 inches at Galena, 35 inches at Galena Summit, and 18 inches at Hyndman.

Heavy Snow in LOST RIVER / PAHSIMEROI, IDAHO
From 17-JAN-12 20:00:00 to 20-JAN-12 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Multiple day snow amounts were 13 inches at Morgan Creek and 23 inches at Meadow Lake.