A push of monsoonal moisture resulted in sporadic flash flooding and isolated microbursts for the end of the month of July.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SLC wrote it up.
A push of monsoonal moisture resulted in sporadic flash flooding and isolated microbursts for the end of the month of July.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Salt Lake City, UT wrote its last area forecast discussion before the first event at Jul 28, 3:08 AM MST, 6 hours 12 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 408 AM MDT Thu Jul 28 2022 .SYNOPSIS...Deep moisture will remain in place over southern Utah through the rest of the week. Some moisture will spread into northern Utah today into Friday. After a modest drying trend over the weekend a more substantial increase in moisture is expected early next week. && .SHORT TERM (Through 12Z Saturday)...Utah and southwest Wyoming remain sandwiched between a ridge over the Great Basin and a trough over the central United States, keeping flow aloft generally light. This has allowed deep moisture to remain pooled over southern Utah, with satellite derived PW values in the 1.0 to 1.2 inch range over that area. This combination of anomalous moisture and light flow will again make conditions ripe for storms to produce heavy rain capable of flash flooding, so going Flood Watch looks good. The ridge will adjust itself southward a bit this morning, allowing a more southerly component of the flow to develop over at least eastern portions of the area, allowing this moisture to spread northward. East central and northeast Utah will see the greatest increase in moisture, but some increase is anticipated across the majority of northern Utah. Given that the northern Utah moisture will initially be a bit high based in nature, any storms that develop will be capable of producing gusty microburst winds. Given the unstable airmass and increase in moisture, seems there is not anywhere in the forecast area where one can rule out convection this afternoon into early this evening and have thus tweaked POPs up a bit for northern Utah. On Friday, the majority of guidance indicates the ridge will wobble back northward, thus bringing back more of a west to northwest component to the flow aloft, ending the increase in northern Utah moisture and eventually bringing the start of a drying trend by Friday afternoon. Numerous to widespread showers and thunderstorms are still anticipated across southern Utah and the higher terrain east of Interstate 15, but elsewhere the threat of afternoon/evening convection looks to wane. Under the influence of the ridge, high temperatures over northern Utah will tend to stay within 5F of seasonal normals, with the moisture and cloud cover keeping maxes a bit below climo over southern Utah. .LONG TERM (After 12Z Saturday)...A net eastward shift in the longwave trough-ridge-trough pattern is expected through the first half of the extended forecast period, bringing increased chances of showers and thunderstorms area-wide instead of being confined to central and southern Utah. Temperatures will start out around normal to start the weekend, if not a few degrees above, then become ~5-10F above average across northern Utah and southwest Wyoming on Sunday and Monday, then transition to near, or even slightly below normal, Tuesday forward. At the beginning of the weekend, the forecast area will remain on the eastern periphery of a broad ridge which will help maintain a drier northwesterly flow overhead. This ridge will continue to shift eastward through the weekend, bringing warmer temperatures and increasing moisture advection across Utah and southwest Wyoming. While the early weekend northwesterly flow won't completely dry out the area, it will help to consolidate diurnally driven convective activity to the southern portions of Utah, especially on Sunday. Flash flooding is still likely to remain an elevated risk in southern Utah as layer PWAT values look to remain at, or above, 1 inch and storm motions look to remain slow. The translating ridge will crest overhead around Sunday and Monday, bringing some of the highest temperatures of the period to mainly northern Utah and southwest Wyoming, as this area is progged to see the most substantial increase in H7 temperatures. Monday will begin to see a transition to deeper southerly flow, bringing more of a sub-tropical moisture tap to the area. With persistent deep southerly flow in place on Monday, some of the higher PWAT values are expected to spread across the area as we set into a more typical monsoonal moisture pattern. In addition to this increase in moisture, model guidance has been consistent in progressing an offshore trough over the northern Intermountain region around the Tuesday and Wednesday period. With the increase in moisture and trough dynamics to the north, thinking that Tuesday (and potentially Wednesday) could feature some rather widespread shower and thunderstorm activity across the forecast area. The higher shear environment in northern Utah could even provide some potential for severe convection, but this will ultimately depend on the depth of the aforementioned trough and how much synoptic forcing we see over the area. Per the 00Z ensemble suite, models are mostly in favor of a shallower mean trough to the north, but 25% of guidance is pointing toward a deeper trough which may favor more aggressive convection over the forecast area. Will continue to monitor trends here, but in general, Tuesday looks like the best day for widespread convection with coverage of showers and thunderstorms gradually decreasing Wednesday and Thursday. && .AVIATION...KSLC...VFR conditions will be maintained over the KSLC terminal with afternoon build-ups anticipated over the surrounding terrain. Surrounding build-ups may develop into showers, but are not expected to move over the terminal. Light southerly drainage flow will transition to a light northerly flow after 18Z with scattered clouds around 20kft AGL. Gusty and erratic outflows in excess of 30 mph may be possible after 20Z. .Rest of Utah and Southwest Wyoming....Isolated showers and thunderstorms are anticipated, primarily near terrain, from KLGU to KDTA, with the biggest threat being gusty and erratic outflow winds. From ~KDTA southward, expect more widely scattered diurnally driven shower and thunderstorm activity with heavy rainfall possible. Terminals with vicinity, or prevailing, TS may see gusty and erratic outflows in excess of 40 mph. A reduction to IFR conditions will be possible due to VIS restrictions in locally heavy rainfall. && .AVIATION...KSLC...VFR conditions will be maintained over the KSLC terminal with afternoon build-ups anticipated over the surrounding terrain. Surrounding build-ups may develop into showers, but are not expected to move over the terminal. Light southerly drainage flow will transition to a light northerly flow after 18Z with scattered clouds around 20kft AGL. Gusty and erratic outflows in excess of 30 mph may be possible after 20Z. .Rest of Utah and Southwest Wyoming....Isolated showers and thunderstorms are anticipated, primarily near terrain, from KLGU to KDTA, with the biggest threat being gusty and erratic outflow winds. From ~KDTA southward, expect more widely scattered diurnally driven shower and thunderstorm activity with heavy rainfall possible. Terminals with vicinity, or prevailing, TS may see gusty and erratic outflows in excess of 40 mph. A reduction to IFR conditions will be possible due to VIS restrictions in locally heavy rainfall. && .FIRE WEATHER...Monsoonal moisture pooled over southern Utah will spread northward through Friday. The greatest increase in moisture will be over northeast Utah but there is at least some potential for showers and thunderstorms across the entire state by late this afternoon. Over southern Utah, heavy rain will be the main threat, but over northern Utah where the moisture will be higher based, there is a threat of gusty and erratic winds from microbursts. The more moist airmass will stay over northern Utah tomorrow before it retreats south over the weekend. There is the potential for a more substantial moisture surge early next week. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...Flood Watch through this evening for UTZ123-124-128>131. WY...None. && SHORT TERM/FIRE WEATHER...Traphagan LONG TERM/AVIATION...Webber For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity For frequently asked questions about the Area Forecast Discussion visit... http://weather.gov/saltlakecity/general/afd_faqs.php
The Cedar City radar (KICX), 89 km away, was scanning. The volume nearest the first event began at 16:19 UTC.
3 debris flow, 3 thunderstorm wind, 3 flash flood. Local standard time, as filed.
An Incident Meteorologist deployed to the Dodge Springs Fire reported a mudflow over Gunlock Road south of Gunlock Reservoir.
Thunderstorms produced heavy precipitation over the Tank Hollow Fire burn scar, with 1-hour Multi-Radar/Multi-Sensor estimates of 1.5 to 2.5 inches of rain. Associated with this, the Dispatch Center in the city of Price reported running water and debris along U.S. Highway 6 from mileposts 197 to 198. It was further reported that dirt and mud was a foot deep, with tree trunks and logs 8 to 10 inches in diameter included in the debris.
Thunderstorms produced heavy rainfall north of Brian Head, with 3-hour Multi-Radar/Multi-Sensor rainfall estimates of around 1 to 2.5 inches. This resulted in debris flows over state Route 143 between mileposts 11 and 13, and closure of the road. Additional reports from the public and media reported debris was up to 7 feet deep in spots.
The Utah Department of Transportation SR-7 at MP 19.5 Sand Hollow mesonet station measured a wind gust of 68 mph at 5:40 pm MST as a result of a nearby microburst's outflow.
The PacifiCorp Crow Mountain mesnonet station measured a wind gust of 59 mph at 8:10 pm MST as a result of nearby thunderstorms.
The Utah Department of Transportation I-15 @ Plymouth mesonet station measured a wind gust of 68 mph at 9:40 pm MST as a result of outflow from nearby thunderstorms.
Rangers at Zion National Park reported flash flooding in Pine Creek and side canyons off of Bridge Mountain due to excessive rainfall in the region.
Heavy rain in portions of the headwaters region of the Paria River resulted in a flow downstream. The Paria River Near Kanab, Utah gauge indicated a rise from 5 CFS to over 520 CFS in a span of 10 minutes, and peaked at 842 CFS, with a rise of over 2 feet.
Thunderstorms produced heavy rainfall over the high terrain near the town of Hildale over the course of an hour, with Multi-Radar/Multi-Sensor 1-hour estimates of around 1 to 1.5 inches of rainfall. Light to moderate rain persisted for 2 to 3 hours thereafter. The rainfall resulted in a strong flow in Short Creek through Hildale and on into Colorado City. Dispatch from Colorado City reported all street crossings across the creek were closed due to flooding, and 3 feet of fast moving water was reported to be flowing across Hildale Street.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2022Every state in 2022This day in weather historyWarnings in Utah, July 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1048058, 1048078, 1048067, 1048031, 1048049, 1048048, 1048034, 1048032, 1048044.