An extremely active weather pattern remained in place across the central Rockies during this time period, mainly characterized by a parade of weather disturbances embedded within an unusually strong mid and upper-level jet stream. This weather pattern resulted in persistent moist orographic ascent over the higher terrain of the Snowy and Sierra Madre mountain ranges, leading to an extended period of very heavy mountain snowfall. SNOTEL observations suggest 4 to 6 feet of snow fell in the mountains over this 72-96 hour period. In addition to the mountain snow, the elevated flow aloft combined with strong pressure gradients and strong subsidence resulted in multiple waves of strong winds with gusts 65-75 MPH, initially starting in the southeast Wyoming wind corridors before eventually spreading into the adjacent valleys and high plains.

Winter Storm in SIERRA MADRE RANGE, WYOMING
From 01-DEC-23 07:00:00 to 04-DEC-23 17:00:00 (MST-7)
Reported by: SNOTEL

Multiple SNOTEL sites suggest a total of 3 to 5 feet of snow fell in the Sierra Madre Range in the 3-day period from 12/1 to 12/4. A maximum estimated total of 54.8 inches was recorded at Little Snake River (LITW4), 12 miles SW of Encampment at an elevation of 8928 feet.

Winter Storm in SNOWY RANGE, WYOMING
From 01-DEC-23 13:00:00 to 04-DEC-23 17:00:00 (MST-7)
Reported by: SNOTEL

Multiple SNOTEL sites suggest a total of 2 to 4 feet of snow fell in the Snowy Range in the 3-day period from 12/1 to 12/4. A maximum estimated total of 49.5 inches was recorded at Medicine Bow (MBSW4), 14 miles WNW of Centennial at an elevation of 10,512 feet.

High Wind in CENTRAL CARBON COUNTY, WYOMING
From 03-DEC-23 21:15:00 to 04-DEC-23 09:00:00 (MST-7)
Magnitude: 52.00 MG
Reported by: ASOS

A peak wind gust of 60 MPH was observed at the KRWL (Rawlins) ASOS at 9:15 PM and 10:09 PM MST on 12/3.

High Wind in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 03-DEC-23 19:50:00 to 04-DEC-23 11:00:00 (MST-7)
Magnitude: 61.00 MG
Reported by: RAWS

Frequent wind gusts 55 to 65 MPH were observed at the Camp Creek RAWS sensor near Muddy Gap along the Carbon and Sweetwater county line. A maximum wind gust to 70 MPH was observed at 5:50 AM MST on 12/4.

High Wind in EAST PLATTE COUNTY, WYOMING
From 04-DEC-23 09:46:00 to 04-DEC-23 11:00:00 (MST-7)
Magnitude: 51.00 MG
Reported by: Department of Highways

Wind gusts frequently exceeded 50 MPH at the Coleman WYDOT sensor (13 miles S of Glendo). A peak wind gust to 59 MPH was observed at 9:46 AM MST on 12/4.

High Wind in LARAMIE VALLEY, WYOMING
From 04-DEC-23 10:56:00 to 04-DEC-23 14:00:00 (MST-7)
Magnitude: 50.00 MG
Reported by: ASOS

Multiple Mesonet observations across the Laramie Valley recorded wind gusts to 55 MPH or greater. The maximum observed wind gust was 58 MPH at the KLAR (Laramie) ASOS at 11:12 AM MST on 12/4.

High Wind in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 02-DEC-23 20:06:00 to 04-DEC-23 11:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Department of Highways

Wind gusts in excess of 60 MPH were observed along I-25 between Chugwater and Wheatland in multiple waves between 12/2 and 12/4. A peak wind gust to 68 MPH was observed at the WYDOT sensor at Bordeaux (KBRX) at 9:06 PM MST on 12/2.

High Wind in CENTRAL LARAMIE COUNTY, WYOMING
From 03-DEC-23 03:56:00 to 04-DEC-23 14:00:00 (MST-7)
Magnitude: 57.00 MG
Reported by: Department of Highways

Multiple wind gusts in excess of 50 MPH were observed across central Laramie County in several waves between 12/2 and 12/4. A peak wind gust to 66 MPH was observed at the Bear Creek WYDOT sensor (WY40) at 3:56 AM MST on 12/3.

High Wind in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 02-DEC-23 18:53:00 to 04-DEC-23 14:00:00 (MST-7)
Magnitude: 57.00 MG
Reported by: Mesonet

Multiple WYDOT and UPR sensors in the South Laramie Range Foothills recorded wind gusts to 58+ MPH in two separate waves between 12/2 and 12/4. The maximum observed wind gust was 66 MPH at the Emkay UPR sensor (14 miles WSW of Cheyenne) at 8:53 PM MST on 12/2.

High Wind in SOUTH LARAMIE RANGE, WYOMING
From 02-DEC-23 19:06:00 to 04-DEC-23 21:00:00 (MST-7)
Magnitude: 66.00 MG
Reported by: Mesonet

High wind gusts were observed over the South Laramie Range in two separate waves between 12/2 and 12/4. Frequent gusts to 60+ MPH were observed at multiple Mesonet sites from various sources, including UPR and WYDOT. The maximum wind gust observed was 76 MPH at the UPR site SHERWS (2 miles WNW of Buford) at 9:44 AM MST on 12/4.

High Wind in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 02-DEC-23 15:42:00 to 05-DEC-23 01:59:00 (MST-7)
Magnitude: 68.00 MG
Reported by: Department of Highways

Frequent wind gusts 60+ MPH were observed along I-80 between Laramie and Rawlins in multiple waves from 12/2 to 12/5. The maximum observed wind gust was 78 MPH at the WYDOT sensor at County Road 402 (3 miles ESE of Elk Mountain) at 2:16 AM MST on 12/3.