A deep upper level low coming ashore along the U.S. West Coast resulted in a combination of strong forcing, instability, and available moisture over the Salt Lake City forecast area. This event prompted an uncommon issuance of a Severe Thunderstorm Watch (number 541 of the year). Scattered strong wind gusts occurred, as did multiple instances of Flash Flooding.

Thunderstorm Wind in TOOELE, UTAH
From 21-SEP-22 14:20:00 to 21-SEP-22 16:45:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Camel Back MTN weather station recorded an initial wind gust of 59 mph at 2:20 pm MST in association with nearby thunderstorm outflow winds. After a brief lull with lighter winds, an additional nearby shower resulted in more strong outflow winds which yielded a peak wind gust of 64 mph at 4:40 pm MST, and a final strong wind gust of 60 mph at 4:45 pm MST.

Thunderstorm Wind in SALT LAKE, UTAH
From 21-SEP-22 22:10:00 to 22-SEP-22 22:10:00 (MST-7)
Location: ALTA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Cardiff Peak weather station recorded a peak wind gust of 64 mph as a result of outflow winds from a nearby thunderstorm moving over the site.

Thunderstorm Wind in TOOELE, UTAH
From 21-SEP-22 21:20:00 to 21-SEP-22 21:20:00 (MST-7)
Location: LAKE PT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The SR-201 at I-80, weather station recorded a wind gust of 65 mph as a result of a thunderstorm and associated outflow winds moving over the site.

Thunderstorm Wind in SALT LAKE, UTAH
From 21-SEP-22 22:00:00 to 21-SEP-22 22:00:00 (MST-7)
Location: SALTAIR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The I-80 at MP 107 weather station recorded a wind gust of 58 mph as a result of a thunderstorm and associated outflow winds moving over the site.

Flash Flood in KANE, UTAH
From 21-SEP-22 12:00:00 to 21-SEP-22 13:00:00 (MST-7)
Location: ADAIRVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Moderate rain moved over portions of Wire Pass and Buckskin Gulch slot canyons, as well as nearby drainages, with 1-hour Multi-Radar/Multi-Sensor rainfall estimates up to 0.75 inches. Flash Flooding was reported by the Paria Contact Station at 12:00 pm MST, with reports of several hikers in the area needing to form human chains in three separate locations to escape flood waters. No injuries were noted at the time of report.

Thunderstorm Wind in TOOELE, UTAH
From 21-SEP-22 12:45:00 to 21-SEP-22 12:45:00 (MST-7)
Location: (DPG)MICHAEL AAF DUG
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Wig Mountain weather station recorded a wind gust of 59 mph as a result of a thunderstorm and its associated outflow winds moving over the site.

Flash Flood in KANE, UTAH
From 21-SEP-22 13:00:00 to 21-SEP-22 14:00:00 (MST-7)
Location: ADAIRVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A strong thunderstorm moved through portions of the Paria River drainage basin, with widespread 1-hour Multi-Radar/Multi-Sensor rainfall estimates of 0.50 to 0.75 inches. This generated a flood wave that propagated downstream, with the Paria near Kanab river gauge rising from 100 CFS around 1:00 pm MST to 1180 CFS at 1:25 pm MST.

Flash Flood in TOOELE, UTAH
From 21-SEP-22 15:00:00 to 21-SEP-22 17:00:00 (MST-7)
Location: OPHIR
Flood cause: Heavy Rain / Burn Area
Property damage: 1.10K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorms moved over the Oquirrh Mountains over the course of an hour or two, resulting in moderate to at times heavy rain over the Jacob City Fire burn scar. Multi-Radar/Multi-Sensor 1-hour rainfall estimates were in the 0.50 to 0.75 inch range. This was enough to result in a flow along Soldier Creek, which resulted in the evacuation of one house by State Route 36 and a road closure.

Flash Flood in GARFIELD, UTAH
From 21-SEP-22 16:00:00 to 21-SEP-22 18:00:00 (MST-7)
Location: CANNONVILLE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Multiple thunderstorms with moderate to heavy rainfall moved over Bryce Canyon National Park during the late evening hours. Multi-Radar/Multi-Sensor 3-hour rainfall estimates showed widespread amounts of 1 to 2 inches, and the Bryce Canyon Airport ASOS recorded nearly 1.5 inches of rain over the span of 3:30 pm MST to 4:30 pm MST. Many trails sustained damage, with some leading to extended trail closures. The Queen's Garden trail suffered a few debris flows with unstable footing and two retaining wall failures. The Peekaboo Loop suffered numerous debris flows and points of trail surface erosion. The Bryce Point Peekaboo Connecting Trail suffered numerous rockfalls and debris flows, two retaining wall failures, and deep incisions of around 1 foot into the trail surface. The Fairyland Loop trail suffered deep incisions of around 1 foot into the trail surface. The Navajo Loop trail had a tree downed on the Two Bridges side. The Wall Street side of the Navajo Loop Trail suffered further debris flows and complete trail erosion in some sections, resulting in an extended trail closure.

Thunderstorm Wind in BOX ELDER, UTAH
From 21-SEP-22 17:39:00 to 21-SEP-22 18:06:00 (MST-7)
Location: NEWFOUNDLAND SIDING
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Groome weather station recorded an initial peak gust of 66 mph at 5:39 pm MST, with final lesser gusts of 63 mph at 6:05 and 6:06 pm MST. These wind gusts were  associated with a cluster of strong thunderstorms and their associated outflow winds which were moving through the area.

Flash Flood in GARFIELD, UTAH
From 21-SEP-22 18:00:00 to 21-SEP-22 20:00:00 (MST-7)
Location: TROPIC
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain from nearby thunderstorms resulted in 3-hour Multi-Radar/Multi-Sensor estimates of around 1 to 2 inches total. Garfield County Dispatch reported flooding in Tropic, Cannonville, and Henrieville. One basement was flooded. Time estimated by radar.

Flash Flood in GARFIELD, UTAH
From 21-SEP-22 18:45:00 to 21-SEP-22 19:45:00 (MST-7)
Location: ESCALANTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Nearby thunderstorms with moderate rainfall resulted in 3-hour Multi-Radar/Multi-Sensor accumulation estimates of around 0.25 to 0.75 inches. The Pine Creek near Escalante stream gauge spiked to a peak flow of 228 CFS at 7:15 pm MST.

Thunderstorm Wind in CACHE, UTAH
From 21-SEP-22 21:00:00 to 21-SEP-22 22:00:00 (MST-7)
Location: PROVIDENCE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Logan Peak weather station recorded an initial peak wind gust of 63 mph at 9:00 pm MST as a result of a thunderstorm and associated outflow winds moving over the site. A second thunderstorm an hour later resulted in a wind gust of 58 mph at 10:00 pm MST.

Flash Flood in GARFIELD, UTAH
From 21-SEP-22 21:20:00 to 21-SEP-22 22:20:00 (MST-7)
Location: ESCALANTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A thunderstorm moved through portions of the Escalante River drainage basin, producing moderate rainfall, with widespread 3-hour Multi-Radar/Multi-Sensor rainfall estimates of 0.50 to 1.00 inches in upstream tributary areas. This generated a flood wave that propagated downstream, resulting in the Escalante near Escalante river gauge spiking to  804 CFS at 9:50 pm MST.

Thunderstorm Wind in TOOELE, UTAH
From 21-SEP-22 20:20:00 to 21-SEP-22 20:20:00 (MST-7)
Location: DUGWAY
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The English Village weather station recorded a peak wind gust of 62 mph as a result of a thunderstorm and associated outflow winds moving over the site.

Thunderstorm Wind in SALT LAKE, UTAH
From 21-SEP-22 21:45:00 to 21-SEP-22 21:45:00 (MST-7)
Location: GARFIELD
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Beach weather station recorded a wind gust of 77 mph as a result of a thunderstorm and associated outflow winds moving over the site.