Heavy snow began falling in the mountains on the 14th and affected all of southeast Idaho through the 16th with the heaviest snow in the central mountains on the 14th through the 15th and in the Snake River Plain and Upper Snake River Highlands on the 16th.

Heavy Snow in SAWTOOTH MOUNTAINS, IDAHO
From 14-DEC-16 05:00:00 to 15-DEC-16 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Stanley COOP observer reported 15 inches of snow.   SNOTEL amounts were the following:  16 inches at Bear Canyon, 19 inches at Mill Creek Summit, 18 inches at Smiley Mountain, and 12 inches at Stickney Mill.

Winter Storm in UPPER SNAKE HIGHLANDS, IDAHO
From 14-DEC-16 05:00:00 to 16-DEC-16 22:00:00 (MST-7)
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy mountain snow began on the 14th and blizzard conditions were present on the 16th.   SNOTEL snow amounts were 12 inches at Island Park and 16 inches at White Elephant.   On the 16th school closed early at 11 am in Fremont County District 215 due to blizzard conditions.   Crashes were reported on Highway 33 in Teton County on the 16th.  An Island Park spotter reported 100 feet visibility on the morning of the 16h with 20 mph winds.   St Anthony received 7 inches of snow on the 16th and Driggs got 11 inches on the 16th.

Winter Storm in UPPER SNAKE RIVER PLAIN, IDAHO
From 16-DEC-16 05:00:00 to 16-DEC-16 23:00:00 (MST-7)
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

A powerful winter storm brought heavy snow and strong winds to the Upper Snake River Plain.   Snow amounts throughout the region reported were the following :  7 inches in Hamer, 8 inches in Rigby, 9 to 12 inches in Idaho Falls, and 12 inches in Sugar City.    At 1030 AM on the 16th a semi-trailer jackknifed between exits 108 and 113 north bound on interstate 15 slowing down traffic to one lane.  This caused three other vehicles to crash or drive off the road.

Heavy Snow in SOUTH CENTRAL HIGHLANDS, IDAHO
From 14-DEC-16 05:00:00 to 15-DEC-16 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Howell Canyon SNOTEL reported 11 inches of snow.

Heavy Snow in LOWER SNAKE RIVER PLAIN, IDAHO
From 16-DEC-16 08:00:00 to 16-DEC-16 23:00:00 (MST-7)
Property damage: 6.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy snow fell in the Lower Snake River Plain on the 16th.   Spotters and NWS employees reported amounts of 9 to 12 inches in the Pocatello and Chubbuck area.   Fort Hall and Blackfoot spotters reported between 6 and 10 inches.    At around 5 pm several cars had slid off interstate 15 near the Blackfoot exit stopping southbound traffic as several autos needed to be towed from the ditch.   Bingham County reported as many as 10 wrecks near that exit.

Heavy Snow in CARIBOU HIGHLANDS, IDAHO
From 14-DEC-16 05:00:00 to 16-DEC-16 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Areas around Lava Hot Springs reported 20 inches of snow.

Heavy Snow in WASATCH MOUNTAINS/IADHO PORTION, IDAHO
From 14-DEC-16 05:00:00 to 15-DEC-16 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Emigrant Summit reported 11 inches of snow.

Heavy Snow in LOST RIVER / PAHSIMEROI, IDAHO
From 14-DEC-16 05:00:00 to 15-DEC-16 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Hilt's Creek SNOTEL reported 11 inches of snow.

Heavy Snow in BIG AND LITTLE WOOD RIVER REGION, IDAHO
From 14-DEC-16 05:00:00 to 15-DEC-16 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Ketchum reported 18 inches of snow with this storm.   SNOTEL amounts were the following:  Chocolate Gulch 21 inches, Dollarhide Summit 18 inches, Garfield Ranger Station 11 inches, Galena 21 inches, Galena Summit 25 inches, Lost Wood Divide 32 inches, Swede Peak 14 inches, and Vienna Mine 27 inches.