A moist Pacific storm moved into Wyoming and brought heavy snow to areas west of the Continental Divide. The heaviest snow fell in the Salt and Wyoming ranges where many areas received over a foot of new snow. The maximum amount was 26 inches estimated at the Spring Creek Divide SNOTEL. Amounts over a foot also fell in the Tetons, Yellowstone National Park, and the Absaroka Range. The western valleys generally received between 6 and 10 inches of snow.
East of the Continental Divide, the same storm system produced strong winds near Clark and across eastern Sweetwater and southern Fremont counties. A tight pressure gradient and strong low level winds mixed to the ground to create the high winds. Peak speeds were registered near the foothills around Clark where a maximum gust of 92 mph was recorded. Portions of Fremont and Sweetwater counties saw wind gusts of 60 to 69 mph.

Winter Storm in TETON & GROS VENTRE MOUNTAINS, WYOMING
From 20-DEC-14 10:00:00 to 21-DEC-14 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in the Tetons. At the Jackson Hole Ski Resort, 15 inches fell on the summit. The highest amount was 16 inches the Grassy Lake SNOTEL.

Winter Storm in JACKSON HOLE, WYOMING
From 20-DEC-14 22:30:00 to 21-DEC-14 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts across the Jackson Valley ranged from 8.3 inches at Moose to 2 inches in the town of Jackson.

Winter Storm in YELLOWSTONE NATIONAL PARK, WYOMING
From 20-DEC-14 12:00:00 to 21-DEC-14 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell across portions of Yellowstone National Park. The highest total was 19 inches at the Lewis Lake Divide SNOTEL.

Winter Storm in ABSAROKA MOUNTAINS, WYOMING
From 20-DEC-14 11:00:00 to 21-DEC-14 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Wolverine SNOTEL estimated 12 inches of new snow.

Winter Storm in UPPER GREEN RIVER BASIN FOOTHILLS, WYOMING
From 21-DEC-14 02:00:00 to 21-DEC-14 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts across the Upper Green River Basin Foothills ranged from 5 to 8.5 inches. The highest amounts fell north and west of Daniel.

High Wind in CODY FOOTHILLS, WYOMING
From 21-DEC-14 02:59:00 to 21-DEC-14 08:29:00 (MST-7)
Magnitude: 80.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Many wind gusts past 58 mph were recorded at the weather sensor 5 miles WNW of Clark. The maximum wind gusts were 91 and 92 mph between 0330 and 0430MST.

High Wind in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 21-DEC-14 00:50:00 to 21-DEC-14 09:50:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The RAWS site at Camp Creek had a maximum wind gust of 69 mph.

High Wind in EAST SWEETWATER COUNTY, WYOMING
From 21-DEC-14 12:30:00 to 21-DEC-14 20:44:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Several sites in eastern Sweetwater County had wind gusts past 58 mph. The highest gust of 67 mph occurred at Snow Springs. The ASOS at Rock Springs-Sweetwater County Airport clocked a gust to 59 mph.

Winter Storm in STAR VALLEY, WYOMING
From 20-DEC-14 12:00:00 to 21-DEC-14 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals across the Star Valley ranged from 10 inches at Thayne to 5 inches at Afton where the snow mixed with rain at times.

Winter Storm in SALT RIVER & WYOMING RANGES, WYOMING
From 20-DEC-14 12:00:00 to 22-DEC-14 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell across the Salt and Wyoming ranges with many areas seeing over 1 foot of new snow. The highest amount was 26 inches at the Spring Creek Divide SNOTEL site.