A moist airmass across Utah in the first week of August led to scattered thunderstorms producing heavy rain. These storms produced several flash floods, primarily across the southern half of Utah.

Thunderstorm Wind in KANE, UTAH
From 03-AUG-17 14:45:00 to 03-AUG-17 14:45:00 (MST-7)
Location: BULLFROG
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A 62 mph wind gust was recorded at the Bullfrog Marina sensor.

Flash Flood in WAYNE, UTAH
From 03-AUG-17 13:00:00 to 03-AUG-17 14:00:00 (MST-7)
Location: NOTOM
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Flash flooding was reported in Capitol Reef National Park, with 4 to 6 inches of flowing water reported in Capitol Gorge. This water damaged the dirt road that provides access to the Capitol Gorge area.

Flash Flood in WASHINGTON, UTAH
From 03-AUG-17 19:00:00 to 03-AUG-17 21:00:00 (MST-7)
Location: ZION LODGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Heavy rain led to flash flooding across the southern half of Zion National Park, including along Pine Creek. In addition, street flooding was reported in the towns of Springdale and Rockville.

Flash Flood in KANE, UTAH
From 05-AUG-17 20:30:00 to 05-AUG-17 22:30:00 (MST-7)
Location: GLEN CANYON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding was reported along Coyote Creek, which is a tributary of Wahweap Creek.

Flash Flood in KANE, UTAH
From 05-AUG-17 21:00:00 to 05-AUG-17 23:00:00 (MST-7)
Location: ADAIRVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Paria River rose from 7 cfs to 1240 cfs, or an increase of approximately 3 feet.

Flash Flood in IRON, UTAH
From 03-AUG-17 17:30:00 to 03-AUG-17 18:30:00 (MST-7)
Location: PAROWAN ARPT
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rain over the Brianhead Fire burn scar caused flash flooding along State Routes 143 and 271, temporarily closing these routes due to debris on the roadways.

Flash Flood in IRON, UTAH
From 06-AUG-17 13:30:00 to 06-AUG-17 23:30:00 (MST-7)
Location: PAROWAN ARPT
Flood cause: Heavy Rain / Burn Area
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Department of Highways

Multiple rounds of heavy rain over the Brianhead Fire burn scar produced both flash flooding and debris flows. This debris and water first inundated State Route 143, ultimately closing portions of the roadway for multiple days. A second round of rain in the early evening hours flowed into Parowan Creek and ran into the town of Parowan, with water 6-8 feet above normal stage during the event. This later flooding damaged four homes in Parowan, primarily basements. In addition, flood damage occurred along Old United States Highway 91, as well as northbound lanes of Interstate 15 between milepost 73 and Parowan. The debris field along Interstate 15 was approximately an eighth of a mile long, and forced the closure of the roadway for several hours.

Flash Flood in GARFIELD, UTAH
From 05-AUG-17 15:30:00 to 05-AUG-17 17:30:00 (MST-7)
Location: NATCH
Flood cause: Heavy Rain / Burn Area
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rain on the Brianhead Fire burn scar once again caused flooding and debris along State Route 143, this time near the White Bridge Campground in the Panguitch Creek Drainage. A front loader was needed to remove the boulders from the road.