Showers and thunderstorms brought gusty outflow winds.
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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.
Showers and thunderstorms brought gusty outflow winds.
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 Jun 1, 2:56 AM MST, 11 hours 34 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 356 AM MDT Sun Jun 1 2025 .SYNOPSIS...High pressure will maintain one more day of hot temperatures today. A low pressure system will bring cooler and unsettled conditions tonight through Tuesday, particularly across the southern half of Utah. An unsettled pattern will continue through much of next week. && .SHORT TERM (Through 12Z/6AM Tuesday)...The upper level blocking pattern which has been in place across the western CONUS for the past few days is in the process of breaking down, as the upper ridge axis has translated east into the central Rockies, while the upper low has lifted a bit northward along the Baja coast. With the ridge east of the forecast area today, southwesterly flow will allow deep mixing across northern Utah, and combined with warming aloft will allow max temps to trend ~5F warmer, and challenge daily records at many locations including KSLC (94). Temperatures across southern Utah will trend slightly cooler given an increase in cloud cover, and slight cooling aloft. Mid level moisture will be on the increase this afternoon, allowing for better coverage of high based showers and thunderstorms capable of strong microburst winds. Hi-res guidance has trended toward keeping the focus of this activity across central and southern Utah, however can't rule out convection from eastern Nevada spreading into northwest Utah and potentially reaching the Wasatch Front this evening. Attention then turns to the upper low off the Baja coast, which will lift inland this afternoon, before crossing the Desert Southwest late tonight through Monday. This moisture rich low will primarily impact southern Utah, with an initial band of precipitation lifting into southern Utah late tonight through Monday morning. Models still differ a bit in the placement of this band, which eventually stalls out within a developing deformation axis across southern and central Utah. Given this band lifts through the area overnight into the morning hours, anticipate more of a stratiform nature to the precipitation with perhaps some embedded convection. There remains a conditional threat for heavy rainfall and potential flash flooding across southern Utah Monday afternoon and evening, which will be dependent on sufficient heating/destabilization to allow for convection. Model forecast soundings depict marginal mid level lapse rates with tall skinny CAPE profiles. This would support a heavy rain threat assuming convection is able to develop, and quite a bit of spread remains within the guidance regarding whether convection indeed develops. As such have maintained "Possible" for the Flash Flood Potential for now given the conditional but uncertain threat. Temperature-wise, cooling aloft coupled with widespread cloud cover and precipitation will knock 10-15F off max temps across southern Utah Monday, with temps running a few degrees below climo. Much of northern Utah will largely remain displaced from the moisture associated with this low, with convection mainly confined to areas east of I-15. The main story across the north Monday will be a considerable cooling trend, as a cold front associated with an upper trough crossing the northern Rockies will drop max temps back to near climo for early June. .LONG TERM (After 12Z/6AM Tuesday)... In the wake of a cold front, Tuesday will feature cooler temperatures across the northern area (1- 3 degrees below normal) while the southern area will begin to see the start of a warming trend with temperatures still remaining upwards of 5 degrees below normal. Remnant moisture will remain in place across the southern area while the north begins to dry out temporarily. As such, expect another day of scattered showers and thunderstorms across southern Utah on Tuesday afternoon. Ensemble mean atmospheric moisture content across the southern area looks to remain between 150-200% of normal which will contribute to increased risk of heavy rainfall and flash flooding in slot canyons and normally dry washes. Similar moisture amounts will linger across the southern area into Wednesday, however, a subtle region of subsidence between a departing mid-level low to the southeast and an approaching shortwave trough to the west will make it a bit more difficult for showers and thunderstorms to develop. That said, moisture and strong heating will pair to generate at least widely scattered showers and thunderstorms across southern Utah Wednesday afternoon. The overall risk for flash flooding will be lower but not negligible. Past Wednesday, the overall pattern remains fairly progressive as moisture resurges northward on Thursday, bringing increased likelihood of showers and thunderstorms across the central and northern Utah mountains. The aforementioned trough to the west will remain quasi-stationary, influencing a warmer and drier southwesterly flow into Utah and southwest Wyoming. The big picture trend through the remainder of the week will be increasing temperatures and decreasing coverage of afternoon showers and thunderstorms. As we approach the Friday/ Saturday timeframe, temperatures are expected to climb back to above normal levels (about 5-10 degrees above normal). At this time, no significant impacts due to heat are expected. && .AVIATION...KSLC...South to southeasterly drainage flow will remain in place over the KSLC terminal through the morning hours, becoming light and out of the north to northwest after 18Z. Afternoon towering cumulus are expected to develop off nearby terrain, with about a 20% chance of TCU developing into showers and moving over the airfield. Showers may develop in the southerly approach and may generate outflow wind gusts that would cause sudden changes in wind speed and direction over the airfield, mainly after 20-21Z. .REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions prevail across the entirety of the forecast area. Widely scattered showers and thunderstorms are anticipated across the southern and central portions of Utah from about 19Z through 03Z, bringing increase potential for gusty and erratic outflow wind gusts in excess of 30- 35 mph. && .FIRE WEATHER...High pressure will slide east of the area today allowing a very warm southwesterly flow to spread across Utah. This will maintain hot daytime temperatures and very low relative humidity, particularly across northern utah where near record temperatures are expected. This hot and generally dry airmass will result in unstable conditions across all zones this afternoon. High based moisture within this flow will spread into the area this afternoon, allowing for widely scattered high based showers and isolated dry thunderstorms. Strong microburst winds will be possible near these showers and thunderstorms. This increase in moisture is associated with a low pressure system which will move through the region tonight through Monday. Widespread wetting rains are expected across southern and portions of central Utah beginning late tonight, and continuing into the day Monday. Although instability will be limited Monday, any thunderstorms which do develop across central and southern Utah will be capable of producing heavy rainfall. Through Monday evening, rainfall totals of 0.50" or more are expected across much of Color Country, particularly zone 496, as well as the higher terrain of central Utah. With the exception of the Uintas, the chance for wetting rain will be much lower across northern Utah, which will largely remain on the fringe of this moisture. The pattern will remain relatively cool and unsettled through much of the upcoming week as a series of weather systems pass through the region. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && Seaman/Webber For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity
Special Weather Statement
National Weather Service Salt Lake City UT
307 PM MDT Sun Jun 1 2025
UTZ115-012145-
Western Millard and Juab Counties UT-
307 PM MDT Sun Jun 1 2025
...A cluster of strong thunderstorms will impact portions of
northwestern Millard and west central Juab Counties through 345 PM
MDT
...
At 306 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms 37 miles west of Delta, moving northeast at 15 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Kings Canyon.
This includes US Route 6 between mile markers 11 and 72.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3884 11361 3920 11404 3973 11352 3923 11276
TIME...MOT...LOC 2106Z 223DEG 14KT 3926 11326
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
JACThe Cedar City radar (KICX), 80 km away, was scanning. The volume nearest the first event began at 21:27 UTC.
4 thunderstorm wind. Local standard time, as filed.
A wind gust of 68 mph was recorded at the I-15 at Beaver mesonet site.
A wind gust of 58 mph was recorded at the Snowville (West) mesonest site.
A wind gust of 61 mph was recorded at the US-40 at Starvation mesonet site.
A wind gust of 63 mph was recorded at the I-215 at I-80 mesonet site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2025Every state in 2025This day in weather historyWarnings in Utah, June 2025
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: 1262068, 1262077, 1278570, 1262072.