Additional mid-level moisture moved into Utah in mid-May, helping to initiate Utah's first severe thunderstorms of 2012. In the first few days of the event, these were largely high-based thunderstorms producing gusty winds. A Pacific storm system then moved into the area on May 18th, primarily producing widespread rain in northern Utah. However, this storm also created strong downslope winds in the Uinta Basin, and helped to initiate thunderstorms in southern Utah capable of producing large hail.

Thunderstorm Wind in TOOELE, UTAH
From 15-MAY-12 17:55:00 to 15-MAY-12 17:55:00 (MST-7)
Location: GOLD HILL
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Causeway sensor in the Dugway Proving Ground mesonet recorded a wind gust of 61 mph.

Thunderstorm Wind in GARFIELD, UTAH
From 15-MAY-12 18:30:00 to 15-MAY-12 18:36:00 (MST-7)
Location: (BCE)BRYCE CANYON AR
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Bryce Canyon ASOS recorded a wind gust of 70 mph.

Thunderstorm Wind in TOOELE, UTAH
From 15-MAY-12 20:25:00 to 15-MAY-12 20:25:00 (MST-7)
Location: GOLD HILL
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Causeway sensor in the Dugway Proving Ground mesonet recorded a wind gust of 75 mph.

Thunderstorm Wind in GARFIELD, UTAH
From 15-MAY-12 20:10:00 to 15-MAY-12 20:15:00 (MST-7)
Location: (BCE)BRYCE CANYON AR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Bryce Canyon ASOS recorded a wind gust of 58 mph.

Thunderstorm Wind in TOOELE, UTAH
From 15-MAY-12 21:10:00 to 15-MAY-12 21:10:00 (MST-7)
Location: GOLD HILL
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Callao sensor in the Dugway Proving Ground mesonet recorded a wind gust of 64 mph.

Thunderstorm Wind in WASATCH, UTAH
From 16-MAY-12 12:20:00 to 16-MAY-12 12:20:00 (MST-7)
Location: KEETLEY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The SR-248 sensor recorded a wind gust of 59 mph.

Thunderstorm Wind in JUAB, UTAH
From 17-MAY-12 12:51:00 to 17-MAY-12 12:51:00 (MST-7)
Location: MILLS
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Sevier Reservoir RAWS recorded a maximum wind gust of 59 mph.

Thunderstorm Wind in SEVIER, UTAH
From 17-MAY-12 14:08:00 to 17-MAY-12 14:08:00 (MST-7)
Location: MONROE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Signal Peak RAWS recorded a maximum wind gust of 59 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-MAY-12 15:40:00 to 17-MAY-12 15:40:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Durand Road sensor in the Dugway Proving Ground mesonet recorded a wind gust of 60 mph.

Hail in IRON, UTAH
From 18-MAY-12 13:35:00 to 18-MAY-12 13:35:00 (MST-7)
Location: PAROWAN ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime-sized hail was reported in Paragonah.

High Wind in WESTERN UINTA BASIN, UTAH
From 18-MAY-12 12:40:00 to 18-MAY-12 12:50:00 (MST-7)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The US-40 at Starvation sensor recorded a maximum wind gust of 59 mph, associated with downslope winds behind a cold front.