A late September moisture surge yielded isolated to scattered showers and thunderstorms from roughly September 28 through the 30, some of which resulted in strong wind gusts. Some isolated flash flooding was noted in some southern Utah locations as well.
Every event with a place to put it. Tap one for its entry below.
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 late September moisture surge yielded isolated to scattered showers and thunderstorms from roughly September 28 through the 30, some of which resulted in strong wind gusts. Some isolated flash flooding was noted in some southern Utah locations as well.
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 Sep 28, 3:18 AM MST, 7 hours 32 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 418 AM MDT Wed Sep 28 2022 .SYNOPSIS...Moisture will continue to spread across the area through Thursday, bringing increased precipitation chances to the region. A cold front will move into northern Utah on Friday, supporting continued precipitation chances before a gradual drying trend begins this weekend. && .SHORT TERM (Through 12Z/6AM Friday)...Early morning analysis and satellite products depict a decaying high pressure ridge near the Four Corners region, with a northwestward extending ridge axis located across Utah. Meanwhile, a shortwave is noted to our southwest across southern California while an area of low pressure lurks just west of the Washington state coastline. Utah and southwest Wyoming are now placed in between the above-mentioned large-scale features, and as a result, deep-layer west-southwest flow has developed. Mid-level moisture advection is well underway early this morning within this flow, and a mid-level cloud deck with embedded virga/sprinkles has developed from SW Utah northeastward into northern Utah, captured best by the high-res FV3. Given antecedent dry low-levels, a couple of these showers will be capable of producing gusty outflow winds this morning. As we head through the day, the above-mentioned California shortwave and its associated subtle vorticity advection will swing northeast through the state, providing some larger-scale forcing to support convective initiation. General theme for the day will feature gradually increasing shower and thunderstorm coverage, with isolated to scattered showers and thunderstorms common by afternoon. An exception will be across southeast Utah and the Swell, where moisture will be more limited. Due to the presence of initially dry low-levels through much of the day, forecast soundings are of the inverted-v variety, and flow through the boundary layer is unidirectional out of the southwest-- with steep low to mid level lapse rates present as well. Thus, showers and storms will be capable of producing gusty and erratic outflow winds/microbursts. 00Z HREF confirms this risk, with a 70% probability of thunderstorm gusts of >30kt painted across Dugway and the Great Salt Lake Desert late this afternoon. As low-levels gradually moisten through the day, a few showers and storms will be capable of producing locally heavy rain, and any training storms will increase the flash-flood risk across susceptible areas. With PWATs forecast to rise into the 0.6-0.8" range by late today, the available quality of moisture pales in comparison to what was observed last week, and instability is forecast to only be of the modest variety, thus widespread heavy rainfall potential is absent from this forecast period. However, training heavier cells do still carry some risk for flash-flooding if they train over sensitive areas. As we head through tonight, a vort lobe is progged to slide eastward across northern Utah as the earlier mentioned area of low pressure moves into Washington state and Oregon. Increasing dynamics by way of improving upper divergence will maintain isolated showers across northern Utah and SW Wyoming overnight, and modest elevated instability will support an isolated thunderstorm risk. Forcing for ascent will continue to improve as we head through the day Thursday with the approach of the low (forecast to move into the Idaho Panhandle by this time), and moisture quality improves at the same time across northern Utah as evidenced by the emergence of a plume of IVT across northern Utah and SW Wyoming by Thursday afternoon. Thus, periods of showers and thunderstorms will develop across northern Utah (maximized along/north of I-70) during the afternoon, with heavier cells capable of producing over 0.10"/hr rainfall rates. Given the continued presence of large-scale ascent, global models and ensembles are in good agreement depicting continued showers across northern Utah and SW Wyoming lingering through Thursday night. Precipitation production will be further buoyed via increasing low to mid-level frontogenesis courtesy of a cold front approaching from the northwest. As we approach the end of the forecast period late Thursday night, snow levels will undergo gradual descent, becoming low enough by late Thursday night to provide increasing potential for at least a light coating of slushy snow across the high Uintas. At this time, accumulations are expected to remain light given limited wet-bulb potential. .LONG TERM (After 12Z/6AM Friday)...Minor impacts from precipitation and wind are expected Friday through Saturday as the trough centered over the forecast area slowly lifts, exiting to the northeast through the weekend. Notably, this system will bring some of the coldest H7 temps of the season to the Utah/Idaho border. While the highest peaks will see temperatures fall to just above/near freezing, it will be difficult to realize the full extent of those cooler temps in valleys overnight given cloud cover and gusty winds munitioning a well-mixed boundary layer in most areas. That said, areas along the Wasatch Front may fall near 50F, with the Wasatch Back and central Utah valleys in the mid to low 40s. Expect large temperature swings with daytime highs rapidly warming on Saturday, Sunday, and beyond as cloud cover recedes each day. Gusty winds are expected for exposed terrain across the entire state in the wake of the trough Friday and especially Saturday, but will remain relatively tame thanks to the slackening gradient of the weakening trough. Following Thursday's precipitation, the lower levels moisten, and expecting lower LCLs and a better environment for more widespread precipitation across south central and eastern Utah on Friday, aided by lift generated with an incoming vort lobe surging through the base of the trough. While lacking the frontogenetical forcing of the day prior, reasonable precipitation chances exist for much of the state east of I-15, and greater still for the high terrain. As the parent trough lifts, the best dynamics will shift north towards the eastern valleys, Uinta mountains, and southwest Wyoming, with precipitation continuing through Saturday morning and possibly into the afternoon before tapering off. Increasing stability in the mid-levels is likely to transition precipitation to more light and stratiform in nature with a greater orographic component at the tail end of the event. The aforementioned scenario is the one of greatest likelihood at this time, but it is worth noting that 27% of the ensemble membership produce a less progressive and weaker system that fails to bring as much moisture through the base of the trough. Another 12% of the membership suggest faster progression enhancing the impact of the dry slot and limiting the precipitation to eastern Utah and western Colorado. For the upcoming workweek, uncertainty grows among the ensembles, though some extent of ridging is present in all. Generally expecting dry, cloudless, and gradually warming conditions, though displacement of the ridge in some solutions would allow for weak disturbances to slide into the region by mid next week. && .AVIATION...KSLC...Showers west of the terminal this morning are producing weak (10-12kt) outflow wind gusts, which are expected to periodically disrupt the southeast drainage flow. Winds are expected to stay southerly through the valid TAF period outside of outflow wind gusts produced by any showers that may form northwest of the terminal, especially this afternoon. Dry air near the surface should help keep high CIGs and good VSBYs maintaining VFR conditions through the valid TAF period. .REST OF UTAH AND SOUTHWEST WYOMING...Scattered showers and thunderstorms are expected from late morning through the afternoon across central and especially southern Utah, increasing in coverage across the state into the afternoon. Generally south to southwest winds will increase through the morning, with gusty southerly winds expected at most terminals. Erratic outflow winds will be the main impact from any nearby showers or thunderstorms. Showers may linger through the evening and overnight into Thursday, especially in the eastern half of the forecast area. && .FIRE WEATHER...Moisture continues to increase from southwest to northeast across the state early this morning, with some high based, light showers observed. As moisture continues to increase today in conjunction with a disturbance moving northeastward across the area, expect shower and thunderstorm coverage to increase as well. Showers will be initially dry, especially for northern areas, before trending wetter as we head through the day. Due to the initially dry low levels, showers and storms will be capable of producing gusty and erratic outflow winds. As activity gradually trends wetter, the main threat with this activity will transition to a local heavy rainfall threat. Some showers and thunderstorms will linger across northern Utah tonight before increasing in coverage with daytime heating on Thursday, especially across the mountains, eastern valleys, and northern Utah generally along and east of the Great Salt Lake. A cold front will then move through northern Utah on Friday, bringing cooler temperatures along with widespread showers and isolated thunderstorms, mainly along and east of I-15. Showers will linger across many of these same areas on Saturday as an area of low pressure meanders around southeast Idaho. Shower and thunderstorm coverage will trend dryer and more isolated on Sunday as the low moves away. Drier and warmer conditions then arrive for early next week. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && ADeSmet/Wessler 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 Salt Lake City radar (KMTX), 78 km away, was scanning. The volume nearest the first event began at 17:49 UTC.
14 thunderstorm wind, 2 flash flood. Local standard time, as filed.
The Grantsville South weather station recorded a wind gust of 69 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Tower Grid weather station recorded a wind gust of 59 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Beach weather station recorded an initial wind gust of 66 mph at 6:50 pm MST, with a peak gust of 75 mph at 7:00 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The Marina weather station recorded an initial wind gust of 60 mph at 6:50 pm MST, with a peak wind gust of 61 mph at 7:20 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The I-80 at MP 81 Dolomite weather station recorded a wind gust of 66 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The SR-201 at I-80, weather station recorded an initial peak wind gust of 70 mph at 7:00 pm MST, and a lesser wind gust of 64 mph at 7:20 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The I-80 at MP 107 weather station recorded an initial wind gust of 59 mph at 7:00 pm MST, and a second wind gust of 59 mph at 7:10 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The Vernon Hill weather station recorded a wind gust of 58 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Fremont Island - Miller Hill weather station recorded an initial peak wind gust of 61 mph at 8:00 pm MST, and a lesser wind gust of 59 mph at 8:10 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The Snowbasin - Mount Ogden weather station recorded wind gusts of 61 mph at 8:30 pm MST and 8:45 pm MST, and subsequent peak wind gusts of 62 mph at 9:00 pm MST and 9:15 pm MST. These gusts were associated with outflow from clusters of showers and thunderstorms moving through the area.
The Murray's Hill weather station recorded a wind gust of 58 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Causeway weather station recorded a wind gust of 58 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
Officials from Capitol Reef National Park reported 1 to 2 feet of water flowing through a wash that feeds into the Grand Wash, as well as 1 to 2 feet of water flowing through Grand Wash itself.
Zion National Park officials reported that normally dry washes near Canyon Junction were seeing flash flooding, that there were waterfalls on both sides of Zion Canyon, and that the campground had minor flooding. A thunderstorm which moved through produced an estimated 0.25 to 0.75 inches of rainfall per Multi-Radar/Multi-Sensor 1-hour analysis.
The SR-65 at Big Mountain Pass weather station recorded a wind gust of 58 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Vernon Hill weather station recorded a wind gust of 58 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
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, September 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: 1056214, 1056215, 1056216, 1056217, 1056221, 1056219, 1056223, 1056220, 1056222, 1056224, 1056225, 1056235, 1056238, 1056239, 1056236, 1056237.