Widespread thunderstorms occurred across Utah on July 17 and 18, with strong winds, large hail, and flash flooding all reported across the state.

Hail in IRON, UTAH
From 18-JUL-15 15:25:00 to 18-JUL-15 15:25:00 (MST-7)
Location: PAROWAN ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to nickel size hail was reported near Parowan.

Thunderstorm Wind in EMERY, UTAH
From 18-JUL-15 13:17:00 to 18-JUL-15 13:17:00 (MST-7)
Location: MOUNDS
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Flattop Mountain RAWS recorded a maximum wind gust of 69 mph.

Thunderstorm Wind in SANPETE, UTAH
From 18-JUL-15 14:16:00 to 18-JUL-15 14:16:00 (MST-7)
Location: EPHRAIM
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A peak wind gust of 72 mph was recorded by the Joe's Valley RAWS.

Flash Flood in WASHINGTON, UTAH
From 18-JUL-15 14:15:00 to 18-JUL-15 16:15:00 (MST-7)
Location: ROCKVILLE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: State Official

Heavy rain caused significant flooding in Hildale, with flood waters damaging both a few roads and a few homes across the area.

Thunderstorm Wind in SUMMIT, UTAH
From 17-JUL-15 14:00:00 to 17-JUL-15 14:00:00 (MST-7)
Location: WANSHIP
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A 21-year-old male was riding a paddle board on the reservoir at Rockport State Park when a strong wind gust caused by a thunderstorm moved through the area. The victim was separated from his group of friends and drowned in the reservoir. His body was recovered the next day. The strongest wind gusts recorded from nearby sensors included 52 mph at the Interstate 80 at Silver Creek Junction sensor and 45 mph at the Interstate 80 at Wanship sensor.

Thunderstorm Wind in TOOELE, UTAH
From 17-JUL-15 20:20:00 to 17-JUL-15 20:25:00 (MST-7)
Location: BARRO
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong thunderstorm winds impacted Interstate 80 with a 72 mph gust recorded at the Interstate 80 sensor in the Dugway Proving Ground mesonet and a 64 mph wind gust recorded at the Interstate 80 at Milepost 29 sensor.

Hail in SUMMIT, UTAH
From 18-JUL-15 15:19:00 to 18-JUL-15 15:19:00 (MST-7)
Location: PINEVIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Nickel-size hail was reported near Meeks Cabin Reservoir, along the Utah/Wyoming border.

Flash Flood in WASHINGTON, UTAH
From 18-JUL-15 16:30:00 to 18-JUL-15 18:30:00 (MST-7)
Location: SPRINGDALE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Park rangers reported flash flooding in Zion National Park, particularly in the Pine Creek drainage. The Virgin River had significant rises from Zion National Park down to St. George, with the river gauge at St. George rising from near 30 cfs up to 2310 cfs. Flooding was also reported in several other locations across the county, including Washington City, Bloomington, and St. George, with at least a dozen different roads in these areas receiving some level of flooding throughout the event.