At the beginning of October, storms brought severe hail and flash flooding to portions of southern Utah.
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.
At the beginning of October, storms brought severe hail and flash flooding to portions of southern Utah.
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 Oct 1, 1:18 PM MST, 2 hours 12 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 218 PM MDT Sat Oct 1 2022 .SYNOPSIS...Unsettled weather will continue across portions of southern and eastern Utah through the weekend. Upper level ridging will build into the region early next week and persist through much of the remainder of the week. && .SHORT TERM (Through 12Z/6AM Monday)...Ahead of a nearly stationary upper-level near the ID/WY border, an associated frontal boundary is draped across central Utah. Early this morning, a weak shortwave riding along the boundary helped to force some strong to severe thunderstorms overnight. That area of ascent has shifted well east into Colorado now, with some subsidence in the lee of the wave allowing for mostly clear skies this morning across southeastern Utah. This has allowed for some recovery of instability thanks to diurnal heating along and ahead of the boundary, with MLCAPE values already 500-1000 J/kg across southeastern Utah. Effective shear also remains elevated along and ahead of the boundary with 30-40 knots, generally oriented uni- directionally per hodographs off the surface, however where storms can tap fully into the surface layer, low-level southeasterly winds across the Swell down to the Grand Staircase, could help increase helicity and shear. Given all of this, strong to severe thunderstorms are expected to develop over the terrain in southern/ south-central Utah, and move eastward across the lower elevation terrain of the Swell, Capitol Reef and Western Canyonlands. Any discrete storms will likely quickly develop supercell characteristics given the shear profile, with some left and right splits possible. The strongest storms could produce isolated large hail, damaging winds and heavy rainfall. This threat is likely to diminish across our forecast area early this evening as storm track farther east into far eastern Utah and western Colorado. Tonight, moisture flux increases from the south again, ahead of another shortwave trough rounding the back side of the upper- level low to our north. This will help back the flow around, and enable better low-level moisture to surge back northward into Utah on Sunday, with the stationary boundary wiggling back northward as a result. With the increase in PW values largely centered lower in the atmosphere, this will help drive CAPE increases into Sunday as well once diurnal heating gets underway. Diffluence ahead of the shortwave rounding the back side of the trough will help shower and thunderstorm coverage to develop a bit more broadly across central and southern Utah on Sunday. While CAPE values increase, shear will back off some given the departure of faster flow aloft. However, there still appears enough shear 20-30 knots to support multicell clusters and possibly linear features propagating on outflow boundaries, which the latest CAMs seem to suggest as well. As such, there appears a to be a greater, more widespread flash flood risk across southern and eastern Utah on Sunday. Have trended the Flash Flood Potential to include many more Probables on Sunday over the more localized threat aforementioned for today. A couple of other potential "gotchas" in the forecast for tonight and tomorrow include the possibility for heavy rainfall developing near Zion National Park tonight as the moisture advection really starts to kick in across southwestern Utah. In addition, there remains some uncertainty with how far west the flash flood risk will extend on Sunday, as the moisture gets advected northward. The latest model trends (00Z EPS EFI values for CAPE and 12Z HREF QPF signal) seem to indicate there is potential for heavy rainfall as far west as Iron, Beaver and southern Millard Counties from around Cedar City to Cove Fort. The threat for heavy rain may extend into the evening hours before diminishing overnight Sunday night into early Monday morning. Otherwise, for northern Utah, expect a tranquil weekend with near normal temperatures we benefit from being on the dry side of the stalled frontal boundary. .LONG TERM (After 12Z/6AM Monday)... The long term period will begin with one last potential for an active day as scattered shower and thunderstorm chances for southern and potentially central Utah will be in play for Monday. After this there will be a stretch of drier and calmer weather for the area. There is potential for an active pattern to return next weekend as a shortwave trough has been spotted in some of the guidance. Monday is expected to be last active day for awhile. A shortwave trough, amongst the longwave trough to our northeast, is positioned over eastern Nevada and will make its way south and east bringing additional lift for showers and thunderstorms across southern and central Utah. With the chance for precipitation across this area means that there is also potential for isolated flash flooding to occur in flood prone areas such as slot canyons and dry washes. After this shortwave moves through, the CWA will experience northerly and northwesterly flow aloft indicating subsidence and a less active weather pattern. A strong amplified ridge is expected to move over our area keeping our temperatures, both high and low temperatures, between normal and 7 degrees above normal. This would mean upper 60s to near 80 degrees for high temperatures across most of the CWA with Washington County being in the mid 80s to near 90 degrees. As far as low temperatures go, expect upper 30s to mid 50s for most of the CWA and near 60 degrees for Washington County. Heading into the weekend is when things look to have the potential to be more active. The GFS deterministic model and about 20% of all ensemble guidance have a progressive shortwave trough that moves through the area. Along with this shortwave, PWAT values increase Saturday across southern Utah to be between 0.60" and 0.85". With moisture and a source for lift, precipitation chances could return however, there are also 80% of all ensemble members representing a drier period with a continued ridge over the area. && .AVIATION...KSLC...Northwest flow will linger for longer than usual this evening, until roughly 06-07z. Then, light southeasterly flow will prevail until around 17-18z. There is a slight chance of some very light showers overnight around 09-12z, however these are not expected to cause any operational concerns. VFR conditions will prevail for the valid TAF period. .REST OF UTAH AND SOUTHWEST WYOMING...Isolated showers and thunderstorms will continue to develop across southeastern UT through sunset east of KBCE. Additional showers are expected after 08z across far southern UT, with coverage increasing after 14z. Stronger storms are expected to form after 18z across portions of UT south of Scipio and east of the Central Mountains. IFR VIS is possible within heavy rainfall within the strongest storms, and gusty and erratic winds are possible. Low clouds near 1500 ft AGL are possible across the Wasatch Back in the early morning hours, however there is only a 15% chance of MVFR or lower CIGs/VIS. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && SHORT TERM...Church LONG TERM...Cecava AVIATION...Cunningham 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
Special Weather Statement
National Weather Service Salt Lake City UT
302 PM MDT Sat Oct 1 2022
UTZ128-012145-
South Central Utah UT-
302 PM MDT Sat Oct 1 2022
...A strong thunderstorm will impact portions of central Garfield
County through 345 PM MDT...
At 302 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Escalante, moving east at 15 mph.
HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Boulder.
This includes Utah Route 12 between mile markers 64 and 81.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3771 11154 3784 11154 3793 11125 3766 11124
TIME...MOT...LOC 2102Z 262DEG 12KT 3778 11146
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH
ChurchSpecial Weather Statement
National Weather Service Salt Lake City UT
409 PM MDT Sat Oct 1 2022
UTZ125-128>130-012245-
Capitol Reef National Park and Vicinity UT-South Central Utah UT-
Western Canyonlands UT-Southern Mountains UT-
409 PM MDT Sat Oct 1 2022
...A strong thunderstorm will impact portions of north central
Garfield and southwestern Wayne Counties through 445 PM MDT...
At 409 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles south of Capitol Reef National Park, moving east at 10 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Capitol Reef National Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 3794 11117 3811 11124 3821 11097 3795 11088
TIME...MOT...LOC 2209Z 254DEG 7KT 3805 11112
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
MTSpecial Weather Statement
National Weather Service Salt Lake City UT
411 PM MDT Sat Oct 1 2022
UTZ125-128-012245-
South Central Utah UT-Southern Mountains UT-
411 PM MDT Sat Oct 1 2022
...A strong thunderstorm will impact portions of central Garfield
County through 445 PM MDT...
At 411 PM MDT, Doppler radar was tracking a strong thunderstorm over
Boulder, or 11 miles northeast of Escalante, moving east at 10 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Boulder.
This includes Utah Route 12 between mile markers 75 and 94.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Salt Lake City.
&&
LAT...LON 3781 11156 3799 11154 3801 11122 3774 11125
TIME...MOT...LOC 2211Z 274DEG 10KT 3790 11147
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
MTThe Cedar City radar (KICX), 169 km away, was scanning. The volume nearest the first event began at 22:31 UTC.
5 flash flood, 4 hail. Local standard time, as filed.
Capitol Reef National Park officials reported flows from Sheets Gulch into Sandy Creek.
Hail sizes ranged from pea to golf ball. An Anasazi State Park employee noted that hail lasted for 30 minutes in Boulder with 2-6 inches of accumulation. At least one car windshield was broken.
Capitol Reef National Park officials relayed a public report of flows across Burr Trail Switchbacks, resulting in the road becoming impassable.
An Anasazi State Park employee reported 1 inch diameter hail at the Anasazi State Park Museum.
A resident reported quarter-sized hail that dented cars in Hanksville.
Pictures from social media shared by broadcast media showed hail damage from Cedar City to Enoch. The largest hail was estimated to be ping pong ball-sized.
Capitol Reef National Park officials reported flash flooding on Sulphur Creek.
The Fort Pearce Wash gauge peaked at 789 cfs.
The Escalante at Escalante river gauge peaked at 518 cfs with a flood wave around 7 p.m.
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, October 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: 1060161, 1060412, 1060162, 1060413, 1060414, 1060415, 1060163, 1060405, 1060409.