A deep closed low dug south into southern Utah and Nevada on November 30th and December 1st. Combined with high pressure centered over Wyoming, a strong pressure gradient developed across much of Utah. This created strong northeasterly canyon and downslope winds across several parts of the state. These winds caused damage across the Wasatch Front, with most of the damage occurring along the northern Wasatch Front. In addition to the winds, heavy snow fell in the mountains of central and southern Utah as the low moved through the area. Note that this episode began in November.

High Wind in GREAT SALT LAKE DESERT AND MOUNTAINS, UTAH
From 01-DEC-11 00:00:00 to 01-DEC-11 09:05:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong gusty winds continued across the Great Salt Lake Desert and Mountains through the morning of December 1st. Peak recorded wind gusts included 67 mph at Lower Cedar Mountain, 65 mph at the Utah Test and Training Range Thermal Treatment Unit sensor, 62 mph at Camel Back Mountain and Gunnison Island, and 58 mph at the Rosebud RAWS. Note that this event began in November.

High Wind in UTAHS DIXIE AND ZION NATIONAL PARK, UTAH
From 01-DEC-11 00:00:00 to 01-DEC-11 23:52:00 (MST-7)
Magnitude: 77.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Both the Badger Spring and White Reef RAWS recorded very strong wind gusts, with gusts greater than 60 mph for the entire day of December 1st. Badger Spring recorded a maximum wind gust of 89 mph, while White Reef's strongest recorded gust was 69 mph. Note that this event began in November.

High Wind in CASTLE COUNTRY, UTAH
From 01-DEC-11 03:05:00 to 01-DEC-11 07:55:00 (MST-7)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Price ASOS recorded strong downslope wind gusts for several hours on the morning of December 1st, with a maximum recorded gust of 62 mph. The US 6 at Helper sensor also recorded a maximum wind gust of 59 mph.

High Wind in SALT LAKE AND TOOELE VALLEYS, UTAH
From 01-DEC-11 03:40:00 to 01-DEC-11 10:00:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Newspaper

While not as strong or long-lived as in the northern Wasatch Front, the Salt Lake Valley also experienced damaging downslope winds. Maximum recorded wind gusts included 69 mph at the University of Utah and 63 mph at the Mouth of Parley's. More than 50 large trees were uprooted, and other damage included branches knocked off trees, damage to business awnings, and damage to residential roofs. In addition, a middle school student in Salt Lake City was seriously injured when a large tree branch fell on him as he was walking to school.

Winter Storm in CENTRAL MOUNTAINS, UTAH
From 01-DEC-11 00:00:00 to 01-DEC-11 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Pine Creek SNOTEL received 1.20 inches of liquid equivalent precipitation, or approximately 16 inches of new snow.

Winter Storm in SOUTHERN MOUNTAINS, UTAH
From 01-DEC-11 03:00:00 to 01-DEC-11 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Donkey Reservoir SNOTEL received 1.40 inches of liquid equivalent precipitation, or approximately 19 inches of new snow.

High Wind in NORTHERN WASATCH FRONT, UTAH
From 01-DEC-11 02:20:00 to 01-DEC-11 20:30:00 (MST-7)
Magnitude: 89.00 MG
Property damage: 82.00M
Crop damage: 0.00K
Reported by: County Official

A strong and destructive downslope windstorm impacted the northern Wasatch Front, with maximum recorded wind gusts of 102 mph in Centerville, 92 mph in West Bountiful, 86 mph in Farmington, and numerous other reports in the 60 to 80 mph range.
Damage from this windstorm was substantial and widespread, with the most extensive damage occurring between North Salt Lake and South Ogden. UDOT reported that 11 semitrailers were knocked over along I-15, which eventually led them to close the road to semis for several hours. In Fruit Heights, a steeple was blown off the roof of a church. Hundreds of trees, power lines, and light poles were knocked over, and some of these caused additional damage when they landed on houses, cars, and other property. The winds were strong enough to shatter windows in some locations, as well as bend or uproot many metal road signs. In the area of the strongest winds, almost all homes experienced damage to roofs, fences, and siding. Flying debris caused a few injuries, but there were no fatalities associated with the wind.
Monetary damage to infrastructure was calculated to be about $6.5 million, almost all of which occurred in Davis County. Private insured losses were a little over $75 million.