An active monsoon surge brought thunderstorms producing heavy rain, damaging wind gusts, and hail across the state.

Thunderstorm Wind in BOX ELDER, UTAH
From 17-AUG-21 09:40:00 to 17-AUG-21 09:40:00 (MST-7)
Location: CROPLEY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Interstate 15 at Tremonton automated weather station reported a peak wind gust of 64 mph.

Hail in GARFIELD, UTAH
From 17-AUG-21 12:40:00 to 17-AUG-21 12:40:00 (MST-7)
Location: RUBYS INN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel-sized hail was reported near Sunrise Point in Bryce Canyon National Park.

Hail in BEAVER, UTAH
From 17-AUG-21 13:54:00 to 17-AUG-21 13:54:00 (MST-7)
Location: BEAVER
Magnitude: 2.00 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

A photo and video on social media showed estimated 2 inch diameter hail, with significant damage to a camper trailer and truck.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 14:58:00 to 17-AUG-21 14:58:00 (MST-7)
Location: CLIVE
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated weather station recorded a peak wind gust of 62 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 15:15:00 to 17-AUG-21 15:15:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Upper Cedar Mountain automated weather station recorded a peak wind gust of 58 mph.

Thunderstorm Wind in MILLARD, UTAH
From 17-AUG-21 15:53:00 to 17-AUG-21 15:53:00 (MST-7)
Location: PUMICE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Black Rock automated weather station recorded a peak wind gust of 64 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 15:20:00 to 17-AUG-21 15:20:00 (MST-7)
Location: DELLE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Interstate 80 at Milepost 68 automated weather station recorded a peak wind gust of 64 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 16:15:00 to 17-AUG-21 16:15:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated weather station recorded a peak wind gust of 61 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 15:55:00 to 17-AUG-21 15:55:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated weather station recorded a peak wind gust of 62 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 16:15:00 to 17-AUG-21 16:15:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated weather station recorded a peak wind gust of 62 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 16:19:00 to 17-AUG-21 16:19:00 (MST-7)
Location: LAKE PT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Marina automated weather station recorded a peak wind gust of 64 mph.

Thunderstorm Wind in SALT LAKE, UTAH
From 17-AUG-21 16:23:00 to 17-AUG-21 16:23:00 (MST-7)
Location: SALTAIR
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Center Tailings automated weather station recorded a peak wind gust of 68 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 16:45:00 to 17-AUG-21 16:45:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated weather station recorded a peak wind gust of 78 mph.

Thunderstorm Wind in SALT LAKE, UTAH
From 17-AUG-21 16:55:00 to 17-AUG-21 16:55:00 (MST-7)
Location: MIDVALE
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree fell on a car at an apartment complex parking lot.

Thunderstorm Wind in SALT LAKE, UTAH
From 17-AUG-21 17:00:00 to 17-AUG-21 17:00:00 (MST-7)
Location: CARTERS SKY RANCH AR
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Four trees fell on a house in Draper.

Thunderstorm Wind in JUAB, UTAH
From 17-AUG-21 17:40:00 to 17-AUG-21 17:40:00 (MST-7)
Location: GLEN CNYN BSN ARPT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Interstate 15 at Milepost 215 Lampson Canyon automated weather station recorded a peak wind gust of 72 mph.

Thunderstorm Wind in UTAH, UTAH
From 17-AUG-21 17:57:00 to 17-AUG-21 17:57:00 (MST-7)
Location: SPRINGDELL
Magnitude: 63.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Provo Canyon automated weather station recorded a peak wind gust of 73 mph.

Thunderstorm Wind in WASATCH, UTAH
From 17-AUG-21 18:00:00 to 17-AUG-21 18:00:00 (MST-7)
Location: CHARLESTON
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Deer Creek Dam automated weather station recorded a peak wind gust of 69 mph.

Thunderstorm Wind in TOOELE, UTAH
From 17-AUG-21 19:36:00 to 17-AUG-21 19:36:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Upper Cedar Mountain automated weather station recorded a peak wind gust of 69 mph.

Flash Flood in KANE, UTAH
From 17-AUG-21 22:00:00 to 17-AUG-21 22:30:00 (MST-7)
Location: PARIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Paria River near Kanab gauge rose 3.3 feet, with an increase in flow from 4 CFS to 1790 CFS.

Flood in MILLARD, UTAH
From 18-AUG-21 05:00:00 to 18-AUG-21 06:00:00 (MST-7)
Location: (U24)DELTA MUNI ARPT
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: COOP Observer

Widespread basement flooding occurred in and around Delta.  An observer reported a 2-day rainfall total of 5.83 inches.

Flash Flood in IRON, UTAH
From 18-AUG-21 05:30:00 to 18-AUG-21 06:30:00 (MST-7)
Location: KANARRAVILLE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding carried debris across Old U.S. Highway 91 through Kanarraville.

Flash Flood in WASHINGTON, UTAH
From 18-AUG-21 06:00:00 to 18-AUG-21 08:30:00 (MST-7)
Location: ZION LODGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The North Fork of the Virgin River near Springdale spiked from 26 CFS to 1560 CFS in just 15 minutes, corresponding to a rise of 4 feet.

Flash Flood in WAYNE, UTAH
From 18-AUG-21 12:25:00 to 18-AUG-21 13:25:00 (MST-7)
Location: FRUITA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported Grand Wash, Capitol Gorge, and Pleasant Creek were all closed due to flash flooding.

Flood in TOOELE, UTAH
From 18-AUG-21 12:57:00 to 18-AUG-21 13:57:00 (MST-7)
Location: STOCKTON
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A portion of Soldier Canyon Road was destroyed, and thus closed, due to flooding.

Flood in SALT LAKE, UTAH
From 18-AUG-21 13:12:00 to 18-AUG-21 16:12:00 (MST-7)
Location: FT DOUGLAS
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Parley's Creek in Sugarhouse Park overflowed its banks, with water across the park road. The eastbound lanes of Interstate 215 at 3300 South were closed due to flooding for two hours. Water flowed across Silver Bowl Drive in Herriman, with two basements flooded. Significant urban flooding occurred at Willowbrook Condos, with basements flooded.  Additionally, Little Cottonwood Creek flooded.

Flash Flood in IRON, UTAH
From 18-AUG-21 03:30:00 to 18-AUG-21 05:30:00 (MST-7)
Location: CEDAR CITY
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding was reported on Coal Creek. The Coal Creek near Cedar City gauge rose from 8 CFS to 1160 CFS overnight. Several homes within the Flying L Ranches subdivision outside of Cedar City were damaged by floodwaters.

Flood in PIUTE, UTAH
From 18-AUG-21 13:30:00 to 18-AUG-21 14:30:00 (MST-7)
Location: ALUNITE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

State Route 89 was briefly closed due to standing water on the road at milepost 171.

Flash Flood in GARFIELD, UTAH
From 18-AUG-21 15:25:00 to 18-AUG-21 16:25:00 (MST-7)
Location: TROPIC
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash flooding produced significant trail damage in Bryce Canyon National Park. Park officials reported the Wall Street section of Navajo Loop, the Bryce Connector Trail, and Peekaboo Loop were closed were closed due to the damage.

Flash Flood in GARFIELD, UTAH
From 18-AUG-21 16:00:00 to 18-AUG-21 17:00:00 (MST-7)
Location: BOULDER
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported Notam-Bullfrog Road was washed out and impassible due to flash flooding south of Sandy Ranch at Dog Water Wash.

Flash Flood in GARFIELD, UTAH
From 18-AUG-21 17:00:00 to 18-AUG-21 17:00:00 (MST-7)
Location: BOULDER
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported Burr Trail, Strike Valley, and Halls Creek Road were all impassible due to flash flooding.

Flash Flood in IRON, UTAH
From 18-AUG-21 22:30:00 to 18-AUG-21 23:30:00 (MST-7)
Location: KANARRAVILLE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A dike collapse due to heavy rainfall led to a large amount of debris across Old U.S. Highway 91, with the road being closed.

Flash Flood in WASHINGTON, UTAH
From 18-AUG-21 23:00:00 to 18-AUG-21 23:45:00 (MST-7)
Location: ZION NATIONAL PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Zion National Park officials reported the Kolob Canyons section of the Park was closed due to significant mud and rock slides from overnight flash flooding.

Flash Flood in KANE, UTAH
From 19-AUG-21 00:45:00 to 19-AUG-21 05:45:00 (MST-7)
Location: GLENDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Heavy rain resulted in flash flooding of the East Fork of the Virgin River. The flood wave started near the East Fork of the Virgin River near Glendale, which rose from 16 CFS to 544 CFS, corresponding to a 3 foot rise. The flood wave grew downstream from additional heavy rain, where the East Fork of the Virgin River near Springdale rose from 45 CFS to 2410 CFS, corresponding to a 6 foot rise.

Flash Flood in GARFIELD, UTAH
From 19-AUG-21 00:45:00 to 19-AUG-21 04:30:00 (MST-7)
Location: ESCALANTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Escalante River near Escalante gauge indicated an increase in flow of 1440 CFS, corresponding to a rise of over 5 feet.

Flash Flood in WAYNE, UTAH
From 19-AUG-21 01:30:00 to 19-AUG-21 02:30:00 (MST-7)
Location: FRUITA
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported Scenic Drive was closed at Grand Wash due to a large amount of mud across the road, deposited by flash flooding, making it impassible. Rangers also estimated Pleasant Creek and Sheets Gulch had 6-8 feet of flooding overnight, and Burro, Cottonwood, and 5 mile Washes had 2 to 4 feet of flooding overnight.

Flash Flood in WASHINGTON, UTAH
From 19-AUG-21 02:30:00 to 19-AUG-21 03:15:00 (MST-7)
Location: ZION LODGE
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Zion National Park dispatch officials reported a rockslide due to excessive rainfall along the Scenic Drive north of the Visitor Center. A portion of the road was damaged due to the slide, and was closed as a result. In addition, the river gauge on the North Fork of the Virgin River near Springdale had a sharp rise and peaked at 1690 CFS, corresponding to a rise of over 3 feet.

Flash Flood in GARFIELD, UTAH
From 19-AUG-21 04:45:00 to 19-AUG-21 05:15:00 (MST-7)
Location: (U07) BULLFROG/GLEN
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported Notam-Bullfrog Road was washed out at Bullfrog Creek Crossing near Glen Canyon National Recreation Area, resulting in a 5-foot drop-off, making the road impassible.

Hail in MILLARD, UTAH
From 19-AUG-21 10:01:00 to 19-AUG-21 10:01:00 (MST-7)
Location: HINCKLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny-sized hail fell.

Flash Flood in WAYNE, UTAH
From 19-AUG-21 11:49:00 to 19-AUG-21 13:30:00 (MST-7)
Location: FRUITA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Capitol Reef National Park officials reported flash flooding in Grand Wash, with 6 to 8 inches of rapidly flowing water.

Thunderstorm Wind in EMERY, UTAH
From 19-AUG-21 12:22:00 to 19-AUG-21 12:22:00 (MST-7)
Location: MOHRLAND
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Manti portable automated weather station, on a ridgetop at 9877 feet, recorded a peak wind gust of 75 mph.