The weather pattern of high pressure over the southeast states and an upper trough along the west coast allowed another surge of monsoonal moisture to move into eastern Utah. Cooling temperatures aloft allowed large hail to form in some of the stronger storms, while heavy rain and some flash flooding also occurred.

Flash Flood in DAGGETT, UTAH
From 17-SEP-13 18:00:00 to 17-SEP-13 21:00:00 (MST-7)
Location: DUTCH JOHN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several areas of flash flooding were observed along Highway 191.

Hail in UINTAH, UTAH
From 17-SEP-13 17:49:00 to 17-SEP-13 17:57:00 (MST-7)
Location: VERNAL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in UINTAH, UTAH
From 17-SEP-13 18:00:00 to 17-SEP-13 21:00:00 (MST-7)
Location: DRY FORK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several areas of flash flooding were observed along Highway 191.

Hail in SAN JUAN, UTAH
From 17-SEP-13 15:40:00 to 17-SEP-13 15:50:00 (MST-7)
Location: (4BL)BLANDING MUNI A
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

Hail in SAN JUAN, UTAH
From 17-SEP-13 15:40:00 to 17-SEP-13 15:50:00 (MST-7)
Location: (4BL)BLANDING MUNI A
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter size hail fell near the Blanding Airport and plows were called out to clear hail off the local roads.

Hail in SAN JUAN, UTAH
From 17-SEP-13 15:45:00 to 17-SEP-13 15:55:00 (MST-7)
Location: BLANDING
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

Large hail damaged a number of vehicles and broke windows.

Hail in SAN JUAN, UTAH
From 17-SEP-13 15:45:00 to 17-SEP-13 15:55:00 (MST-7)
Location: (4BL)BLANDING MUNI A
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Department of Highways

Large hail accumulated up to four inches deep on local roadways which required snow plows to remove it. Trees were stripped of leaves and sagebrush was flattened. A number of vehicles were damaged by the large hail.

Hail in UINTAH, UTAH
From 17-SEP-13 17:30:00 to 17-SEP-13 17:40:00 (MST-7)
Location: LAPOINT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UINTAH, UTAH
From 17-SEP-13 15:50:00 to 17-SEP-13 16:00:00 (MST-7)
Location: VERNAL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail accumulated up to two inches deep on Highway 191 and minor flooding was reported in the area.

Hail in UINTAH, UTAH
From 17-SEP-13 17:50:00 to 17-SEP-13 18:00:00 (MST-7)
Location: VERNAL
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UINTAH, UTAH
From 17-SEP-13 17:55:00 to 17-SEP-13 18:05:00 (MST-7)
Location: MAESER
Magnitude: 1.75 
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Public

Large hail flattened gardens, dented a number of vehicles, and broke windows.

Hail in UINTAH, UTAH
From 17-SEP-13 17:55:00 to 17-SEP-13 18:05:00 (MST-7)
Location: VERNAL
Magnitude: 1.50 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Large hail flattened gardens, dented a number of vehicles, and broke some windows.

Hail in UINTAH, UTAH
From 17-SEP-13 17:52:00 to 17-SEP-13 18:00:00 (MST-7)
Location: VERNAL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter