An upper level low and deep Pacific moisture combined to bring heavy snow to areas west of the Continental Divide. The westerly flow favored the Teton Range where the heaviest snow fell. Over three feet of new snow was estimated to have fallen at both the Grand Targhee and Grassy Lake SNOTEL sites. More than a foot of snow also fell in portions of the Salt River and Wyoming ranges, the Absaroka Range, and Yellowstone National Park. Favorable northwest flow aloft also brought over a foot of snow to northern portions of the western Bighorn Range. The heaviest snow in the lower elevations was at Alpine where 16.5 inches of new snow fell. Totals in Jackson Hole approached 10 inches.
East of the Divide, a tight pressure gradient and strong mid-level winds mixing to the surface brought high winds to several locations. The strongest recorded winds were near Clark, where a gust to 113 mph was measured. Measured gusts in the Green and Rattlesnake ranges and on the south side of Casper in Natrona County topped out at 88 mph and 81 mph, respectively. Peak speeds in southern Lincoln County, eastern Sweetwater County, and the Upper Wind River Basin ranged from 60 to 66 mph.

Winter Storm in BIGHORN MOUNTAINS WEST, WYOMING
From 04-JAN-15 20:00:00 to 05-JAN-15 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The SNOTEL site at Shell Creek estimated 16 inches of new snow.

High Wind in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 04-JAN-15 13:50:00 to 06-JAN-15 00:50:00 (MST-7)
Magnitude: 76.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Wind gusts of 88 mph were reported at both the Fales Rock and Camp Creek RAWS stations.

Winter Storm in YELLOWSTONE NATIONAL PARK, WYOMING
From 04-JAN-15 06:00:00 to 05-JAN-15 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The SNOTELs at Sylvan Lake and Two Ocean Plateau recorded an estimated 19 inches of new snow.

High Wind in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 05-JAN-15 02:31:00 to 05-JAN-15 14:00:00 (MST-7)
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds blew on the south side of Casper. The weather sensor at Outer Drive recorded many wind gusts past 58 mph with a maximum of 81 mph.

High Wind in CODY FOOTHILLS, WYOMING
From 05-JAN-15 04:51:00 to 05-JAN-15 07:07:00 (MST-7)
Magnitude: 98.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very strong winds occurred in the vicinity of Clark. The wind sensor 5 miles west of Clark had several wind gusts above hurricane force, including a maximum of 113 mph.

Winter Storm in TETON & GROS VENTRE MOUNTAINS, WYOMING
From 04-JAN-15 02:00:00 to 05-JAN-15 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Very heavy snow fell in portions of the Tetons. The highest amounts were recorded at the Grand Targhee and Grassy Lake SNOTEL stations. In addition, 33 inches of new snow was measured on top of the Jackson Hole Ski Resort.

Winter Storm in JACKSON HOLE, WYOMING
From 04-JAN-15 03:00:00 to 05-JAN-15 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported heavy snow in much of the Jackson Valley. Nearly 10 inches of new snow fell at Moose and Jackson.

High Wind in UPPER WIND RIVER BASIN, WYOMING
From 05-JAN-15 07:50:00 to 05-JAN-15 08:00:00 (MST-7)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 61 mph was recorded at the Dubois Elementary School.

High Wind in SOUTH LINCOLN COUNTY, WYOMING
From 05-JAN-15 13:55:00 to 05-JAN-15 13:55:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the airport near Kemmerer recorded a wind gust of 60 mph.

High Wind in EAST SWEETWATER COUNTY, WYOMING
From 05-JAN-15 05:24:00 to 05-JAN-15 14:44:00 (MST-7)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Numerous wind gusts over 58 mph were recorded at the Snow Springs Creek RAWS including a maximum of 66 mph. The Rock Springs Airport ASOS had a wind gust of 59 mph at 0524MST and 1146MST.

Winter Storm in STAR VALLEY, WYOMING
From 04-JAN-15 04:00:00 to 05-JAN-15 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in portions of the Star Valley. The heaviest snow fell at Alpine where 16.5 inches of new snow was measured. Farther south, 6 inches of snow was measured at Afton where warmer air caused the snow to mix with rain at times.

Winter Storm in SALT RIVER & WYOMING RANGES, WYOMING
From 04-JAN-15 04:00:00 to 05-JAN-15 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell in the Salt and Wyoming Ranges. The highest total was 21 inches at the Spring Creek Divide SNOTEL site.

Winter Storm in UPPER GREEN RIVER BASIN FOOTHILLS, WYOMING
From 04-JAN-15 16:00:00 to 05-JAN-15 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 7 inches of new snow at Bondurant.

Winter Storm in ABSAROKA MOUNTAINS, WYOMING
From 04-JAN-15 04:00:00 to 05-JAN-15 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The SNOTEL station at Evening Star estimated 26 inches of new snow. The Wolverine SNOTEL had 19 inches.