Following scattered convection throughout the afternoon hours, a more cohesive squall line formed over Utah's West Desert region. This squall progressed eastward through the northern portions of the state, resulting in a swath of strong to very strong wind gusts, due in part to low dew points and dry low levels of the atmosphere.
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.
Following scattered convection throughout the afternoon hours, a more cohesive squall line formed over Utah's West Desert region. This squall progressed eastward through the northern portions of the state, resulting in a swath of strong to very strong wind gusts, due in part to low dew points and dry low levels of the atmosphere.
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 3, 3:05 PM MST, 5 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 405 PM MDT Mon Jul 3 2023 .SYNOPSIS...Thunderstorms capable of producing strong gusty winds are expected to continue across northern Utah and southwest Wyoming through this evening. A cold front will bring a modest cooldown to northern Utah Tuesday into Wednesday while hot, dry and windy conditions will continue Tuesday across southern Utah. && .SHORT TERM (THROUGH 12Z WEDNESDAY)...High pressure has given way to a near zonal flow aloft this afternoon as a shortwave trough digs into the northwestern CONUS. PWATs have risen to between 0.6 inches across the southern half of Utah to around 0.7-0.8 inches across northwestern Utah. Even within the pocket of higher PWAT, the moisture is still mainly confined to the midlevels, with dewpoints generally in the upper 30s to mid 40s at many northern Utah surface obs. However, enough moisture and instability is present to generate showers and thunderstorms across the area, with scattered coverage across the north and more isolated coverage across the south. Mesoscale analysis of SBCAPE shows values of ~1000 J/kg across portions of northern Utah. Meanwhile, DCAPE of between 1500-2000 J/kg is common across northern and central Utah, which is consistent with model soundings depicting a deep inverted-V profile at many locations. There remains some agreement in CAMS on the evolution of a cluster of showers and thunderstorms currently over the west deserts into a complex that will be capable of producing gusty outflow winds. The 12z HREF ensemble max depicts pockets of greater than 60 mph gusts, especially over the Dugway area and in southwest Wyoming (HREF members are in greatest agreement in southwest Wyoming, showing a 30% chance of greater than 50 mph winds). The timing of this complex has it moving through SLC around 00z and through Uinta County, WT around 02-03z. While the stronger storms taper off late this evening, some models continue to indicate nocturnal showers continuing to focus near the cold front tonight. This precipitation band looks to center near the Ogden area late this evening, then shift to near SLC towards the morning hours and shifting only slightly southward tomorrow afternoon. Showers will taper off tomorrow evening as high pressure begins to build in from the west. .LONG TERM (after 12z Wednesday)...Relatively cool air will remain in place over northern Utah and southwest Wyoming on Wednesday. As the shortwave trough moves out Wednesday, a low-amplitude ridge will take up residence just to the east of the area and a trough to the west from Thursday through at least Sunday. This set-up will bring temperatures close to seasonal norms. With no good moisture tap in this pattern, very dry conditions will be present area-wide. The only area with higher than a 5% chance of precipitation on any given afternoon is the High Uinta Mountains. And even that famously thunderstorm-prone area barely gets to a 20% probability of measurable rain at a given location on the wettest day (Wednesday afternoon) and is below 10% thereafter. The most consequential aspect of the pattern Thu-Sat will be southwesterly winds in areas south of the latitude of Delta and Price. The wind will not be strong enough to be damaging, although it will make for uncomfortable tent camping. The main concern is for fire weather. There is a high probability (70-90%) of relative humidity below 15% and wind gusts of 30 mph or higher, the criteria in the atmospheric part of the red flag warning equation. However fuel dryness will still be the limiting factor on problematic fires in all but far southern Utah. Friday looks to be the driest and windiest day at this time. Beyond the weekend, the global ensembles are in agreement on a ridge building over the Intermountain West. This would bring an end to the windy conditions but also hotter temperatures, low relative humidity and continued very low probabilities for wetting rain. && .AVIATION...KSLC...Chaotic winds continue as a well-defined sharp boundary between northwest and southerly winds sits just over the airfield. Expect northerly winds to creep into the northern half of the airfield but for the prevailing winds to stay southerly with punches of southwest flow. Northerly incursions should remain around or under 12 kts. Thunderstorms will approach the terminal by 23Z and persist as late as 01Z. Additional isolated storms may develop off terrain beyond what is currently forecast. Overall VFR conditions are expected to persist as cloud bases remain high, and rain and visibility reductions should be light. The potential for blowing dust reducing visibility exists if stronger winds materialize. A 20% chance exists that light rain showers will continue in the vicinity of the terminal overnight, though without the wind threat. .REST OF UTAH AND SOUTHWEST WYOMING...Scattered thunderstorms continue across the northern half of the forecast area this evening, capable of producing sudden and strong microburst winds and semi- organized outflow boundaries. Blowing dust is possible in the vicinity of these strong winds, especially across the West Desert. Storms will weaken after 01Z and dissipate after sunset, though there is a 20% chance that showers continue overnight across portions of northern Utah from ENV to EVW in SW Wyoming, with a much lesser wind threat associated with these overnight showers. && .FIRE WEATHER...A weather disturbance grazing northern Utah will bring a cold front into northern Utah tonight into tomorrow. Ahead of this front, scattered showers and thunderstorms, especially across northern Utah, will continue this evening. A few of these storms may produce wetting rain, but most will be dry. The cold front will settle across central Utah tomorrow and serve as a focus for showers and thunderstorms tomorrow. Breezy southwest winds will continue across southern Utah tomorrow ahead of the cold front. Thereafter, weak high pressure will bring a drying trend to the area for the middle to latter part of the week. However, breezy southwest winds and low humidity will develop again across southern and portions of central Utah Thursday into the weekend. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && Cheng/Jeglum/Wessler For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity
Special Weather Statement
National Weather Service Salt Lake City UT
133 PM MDT Mon Jul 3 2023
UTZ101-103-032000-
Eastern Box Elder County UT-Great Salt Lake Desert and Mountains UT-
133 PM MDT Mon Jul 3 2023
...A strong thunderstorm will impact portions of north central Box
Elder County through 200 PM MDT...
At 133 PM MDT, Doppler radar was tracking a strong thunderstorm 13
miles east of Park Valley, or 19 miles west of Snowville, moving east
at 40 mph.
HAZARD...Wind gusts up to 50 mph and pea 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...
Snowville and Curlew Junction.
This includes the following highways...
Interstate 84 between mile markers 0 and 15.
Utah Route 30 between mile markers 65 and 90.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4179 11256 4183 11315 4200 11315 4200 11260
TIME...MOT...LOC 1933Z 264DEG 33KT 4189 11308
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
224 PM MDT Mon Jul 3 2023
UTZ101-103-032100-
Eastern Box Elder County UT-Great Salt Lake Desert and Mountains UT-
224 PM MDT Mon Jul 3 2023
...A strong thunderstorm will impact portions of north central Box
Elder County through 300 PM MDT...
At 224 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles east of Park Valley, or 25 miles southwest of Snowville, moving
east at 30 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This storm will remain over mainly rural areas of north central Box
Elder County.
This includes the following highways...
Interstate 84 between mile markers 3 and 5.
Utah Route 30 between mile markers 62 and 72, and between mile
markers 86 and 90.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4174 11321 4192 11321 4198 11275 4189 11271
4173 11274
TIME...MOT...LOC 2024Z 261DEG 25KT 4179 11314
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
231 PM MDT Mon Jul 3 2023
UTZ111>113-032100-
Wasatch Plateau/Book Cliffs UT-Western Uinta Mountains UT-
Wasatch Mountains South of I-80 UT-
231 PM MDT Mon Jul 3 2023
...A strong thunderstorm will impact portions of southeastern Wasatch
and central Utah Counties through 300 PM MDT...
At 231 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles east of Mapleton, or 20 miles southeast of Provo, moving east
at 30 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Strawberry Reservoir.
This includes US Route 40 between mile markers 38 and 57.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4002 11140 4020 11141 4036 11098 4006 11088
TIME...MOT...LOC 2031Z 252DEG 26KT 4011 11130
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
252 PM MDT Mon Jul 3 2023
WYZ021-032130-
Southwest Wyoming WY-
252 PM MDT Mon Jul 3 2023
...A strong thunderstorm will impact portions of southeastern Uinta
County through 330 PM MDT...
At 252 PM MDT, Doppler radar was tracking a strong thunderstorm over
Robertson, or 28 miles east of Evanston, moving east at 30 mph.
HAZARD...Wind gusts up to 50 mph and pea 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...
Lyman, Robertson, Mountain View, Millburne, Church Buttes and Fort
Bridger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4110 11055 4132 11055 4147 11005 4110 11005
TIME...MOT...LOC 2052Z 252DEG 26KT 4122 11041
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
318 PM MDT Mon Jul 3 2023
UTZ101-103-032145-
Eastern Box Elder County UT-Great Salt Lake Desert and Mountains UT-
318 PM MDT Mon Jul 3 2023
...A strong thunderstorm will impact portions of north central Box
Elder County through 345 PM MDT...
At 318 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles southwest of Snowville, moving east at 40 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Snowville, Howell and Curlew Junction.
This includes the following highways...
Interstate 84 between mile markers 0 and 22.
Utah Route 30 between mile markers 67 and 90.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4177 11246 4177 11313 4200 11313 4200 11246
TIME...MOT...LOC 2118Z 260DEG 34KT 4185 11298
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
342 PM MDT Mon Jul 3 2023
UTZ101-032230-
Great Salt Lake Desert and Mountains UT-
342 PM MDT Mon Jul 3 2023
...Strong thunderstorms and outflow winds will impact portions of
south central Box Elder and central Tooele Counties through 430 PM
MDT...
At 342 PM MDT, Doppler radar was tracking strong thunderstorms and
outflow winds along a line extending from 14 miles northwest of Utah
Test and Training Range South to 14 miles southeast of Dugway
Proving Ground Test Range. Movement was northeast at 45 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Dugway English Village, Dugway Proving Ground Test Range, Utah Test
and Training Range South, Knolls, Utah Test and Training Range North,
Clive, Skull Valley and Bonneville Salt Flats.
This includes Interstate 80 in Utah between mile markers 10 and 61.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4111 11336 4100 11309 4072 11282 4039 11256
4015 11255 3990 11321 4078 11390
TIME...MOT...LOC 2142Z 229DEG 38KT 4069 11368 4000 11310
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
STWThe Salt Lake City radar (KMTX), 134 km away, was scanning. The volume nearest the first event began at 22:09 UTC.
46 thunderstorm wind. Local standard time, as filed.
The Camel Back MTN mesonet 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 English Village mesonet station recorded a peak wind gust of 69 mph at 3:20 pm MST as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area. A second strong wind gust of 64 mph was recorded at 3:25 pm MST before winds began to subside.
The Aragonite mesonet station recorded a wind gust of 61 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The Tintic mesonet 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 Johnsons Pass mesonet station recorded a wind gust of 63 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Clover mesonet station recorded a wind gust of 63 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area.
The Eureka Ridge mesonet 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 I-80 at MP 71 East Delle mesonet station recorded a wind gust of 59 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
Trees and large branches were downed in Genola.
The I-15 at MP 241 Rocky Ridge mesonet station recorded a wind gust of 60 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
A large tree was downed/uprooted, including its associated large root ball.
The Marina mesonet station recorded a wind gust of 63 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The Santaquin mesonet station recorded a wind gust of 58 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The SR-68 at MP 16 Mosida mesonet station recorded a wind gust of 59 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The SR-201 at I-80 mesonet station recorded a wind gust of 64 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The West Mountain South mesonet station recorded a wind gust of 67 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The I-80 at MP 107 mesonet station recorded a wind gust of 67 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The I-15 at Beer Creek mesonet station recorded an initial strong wind gust of 71 mph at 4:20 pm MST as a result of outflow winds associated with a line of showers and thunderstorms moving through the area. A second peak wind gust of 79 mph was recorded at 4:30 pm MST before winds began to subside.
Public reports indicated multiple power poles down and multiple trees uprooted in the Salem area.
Multiple power lines were downed in Taylorsville.
The Point of the Mountain (I-15 Alpine) mesonet station recorded a wind gust of 62 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The SR-131 at MP 0.5 Porter Rockwell Bridge mesonet station recorded a wind gust of 63 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
An mPING damage report indicated 1-inch tree limbs broken and shingles blown off in Herriman.
The Flight Park South mesonet station recorded a wind gust of 64 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The FAA Wind Sensor at Salt Lake City International Airport recorded a wind gust of 65 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
Public report of approximately 3 to 4 inch diameter tree limbs broken.
The Salt Lake City International Airport ASOS (KSLC) recorded a wind gust of 58 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The Provo Canyon mesonet station recorded a wind gust of 62 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The Alta Aquaduct mesonet station recorded a wind gust of 61 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
A tree was downed in Santaquin.
A light pole was downed in Bountiful.
A roof was blown off of a manufactured home in Washington Terrace.
A tree was snapped off near its base in Midvale.
The US-189 at Deer Creek Dam mesonet station recorded a wind gust of 84 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The DV - Mount Baldy mesonet station recorded a period of strong wind gusts in excess of 58 mph between 4:55 pm MST and 5:15 pm MST, with a peak wind gust of 76 mph recorded at 5:05 pm MST. These were the result of outflow winds associated with a line of showers and thunderstorms moving through the area.
In Farmington, a tree was snapped off near its base.
MPING relayed damage report of 1-inch tree limbs broken and shingles blown off in Midway.
In South Ogden, 6-inch tree limbs were snapped off.
A large and healthy tree was snapped off near its base at the Heber City police station.
Power lines were downed in Morgan.
Multiple trees were downed in Midway.
The I-80 at Silver Ck Jct mesonet station recorded a wind gust of 66 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The SR-248 mesonet station recorded a wind gust of 65 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The Brown's Canyon mesonet station recorded a wind gust of 58 mph as a result of outflow winds associated with a line of showers and thunderstorms moving through the area.
The I-80 at MP 29 mesonet station recorded a wind gust of 60 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area, which formed after the passage of the squall line earlier in the evening.
The I-80 at MP 40 Knolls mesonet station recorded a wind gust of 73 mph as a result of outflow winds associated with a nearby cluster of showers and thunderstorms moving through the area, which formed after the passage of the squall line earlier in the evening.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2023Every state in 2023This day in weather historyWarnings in Utah, July 2023
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: 1106387, 1106389, 1106404, 1106391, 1106393, 1106395, 1106401, 1106408, 1106413, 1106716, 1106417, 1106420, 1106426, 1106427, 1106428, 1106429, 1106436, 1106437, 1106438, 1106440, 1106441, 1106443, 1106677, 1106712, 1106444, 1106446, 1106451, 1106693, 1106698, 1106447, 1106448, 1106449, 1106450, 1106453, 1106671, 1106670, 1106672, 1106673, 1106674, 1106675, and more.