Monsoon moisture increased across the region as the area of high pressure shifted towards the Southern Plains. The abundance of moisture fueled numerous showers and thunderstorms during the afternoon and evening hours. Storms were slow moving and produced heavy rain. A debris flow occurred on the Pack Creek Fire burn scar as a result of a large amount of heavy rain in a short period of time which then flowed downstream to impact other areas such as near Moab which experienced some flash flooding. Additionally, thunderstorms produced damaging winds outside of Moab.

Flash Flood in GRAND, UTAH
From 11-AUG-22 18:00:00 to 11-AUG-22 18:00:00 (MST-7)
Location: MOAB
Flood cause: Heavy Rain
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Several side streets and low lying areas flooded along Mill and Pack Creeks as a result of heavy rain over the Pack Creek Fire burn scar. Water ran out of its banks in many spots. The Mill Creek stream gauge in Moab increased by 9 feet in 2 hours. Additionally, areas near Moab reported 0.80 to 1.2 inches of rain.

Debris Flow in SAN JUAN, UTAH
From 11-AUG-22 18:00:00 to 11-AUG-22 18:00:00 (MST-7)
Location: GRAND CO ARPT
Flood cause: Heavy Rain / Burn Area
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Mesonet

A debris flow started on the Pack Creek Fire burn scar as measured by a USGS stream gauge which saw a notable jump as a result of heavy rain from thunderstorms.

Debris Flow in SAN JUAN, UTAH
From 11-AUG-22 18:00:00 to 11-AUG-22 18:00:00 (MST-7)
Location: GRAND CO ARPT
Flood cause: Heavy Rain / Burn Area
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Mud and rocks flowed across Desert Solitaire Road where it crosses Pack Creek as a result of heavy rain over the Pack Creek Fire burn scar.

Thunderstorm Wind in GRAND, UTAH
From 11-AUG-22 18:10:00 to 11-AUG-22 18:10:00 (MST-7)
Location: MOAB
Magnitude: 50.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts estimated to be between 55-60 mph caused significant roof damage in the Navajo Ridge neighborhood outside Moab. Several solar panels were damaged.

Flash Flood in SAN JUAN, UTAH
From 11-AUG-22 18:15:00 to 11-AUG-22 18:15:00 (MST-7)
Location: GRAND CO ARPT
Flood cause: Heavy Rain / Burn Area
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Flash flooding occurred at the intersection of Pack Creek Road and La Sal Loop Road as a result of heavy rain over the Pack Creek Fire burn scar. Water pummeled the bridge and flowed over the road.

Debris Flow in GRAND, UTAH
From 11-AUG-22 18:15:00 to 11-AUG-22 18:15:00 (MST-7)
Location: MOAB
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rain from thunderstorms and measured 1.37 inches in less than an hour. Debris including mud and rocks flowed on nearby portions of Highway 191 in addition to some downed trees branches from strong winds.

Flash Flood in GRAND, UTAH
From 11-AUG-22 18:30:00 to 11-AUG-22 18:30:00 (MST-7)
Location: MOAB
Flood cause: Heavy Rain
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Public

Flash flooding occurred on Kane Springs Road as a result of heavy rain. Social media reports showed a prolific waterfall over slick rock.

Flash Flood in GRAND, UTAH
From 11-AUG-22 18:30:00 to 11-AUG-22 18:30:00 (MST-7)
Location: MOAB
Flood cause: Heavy Rain
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Social Media

Flash flooding occurred north-northwest of Moab as a result of heavy rain. Social media reports showed a prolific waterfall over slick rock with water flowing on the side of Utah Highway 128.