Thunderstorms brought rain and gusty outflow winds to portions of northern Utah.
Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
Thunderstorms brought rain and gusty outflow winds to portions of northern 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 Jun 6, 3:12 AM MST, 10 hours 3 minutes earlier.
Area Forecast Discussion National Weather Service Salt Lake City UT 412 AM MDT Tue Jun 6 2023 .SYNOPSIS...Drier air will move into southwest Utah today as the threat of showers and thunderstorms continues over the remainder of the forecast area, with some marginally severe storms possible. Southern Utah will remain on the dry side over the next several days as daily showers and thunderstorms continue over northern Utah and southwest Wyoming. && .SHORT TERM (Through 12Z Thursday)...Low pressure remains centered over the southern California coast this morning, putting Utah and southwest Wyoming under a southerly flow aloft. This is allowing drier air pooled over Arizona to spread northward into southwest Utah while a relatively moist airmass remains over the remainder of the forecast area. Seeing just a few overnight showers focused along a boundary coincident with the leading edge of the low. As the day goes on the low will pivot, moving this boundary into northern Utah. Though all but southwest Utah will see at least widely scattered convection, best coverage will be for areas along and north of the boundary. Favorable jet support will bring good upper level divergence and despite marginal shear, there is some potential for a bit of organized convection. Also, with the drier air starting to move northward lower levels have dried out some, giving the atmosphere an inverted-v profile that would indicate an above average threat of gusty microburst winds this afternoon, particularly over northwest Utah. As the low continues to pivot and move farther east, the boundary is eventually expected to exit the area tonight/early tomorrow, though would not be surprised to see some convection continue over far northern Utah/southwest Wyoming overnight. For Wednesday, drier air will continue to spread northward, limiting the threat of convection for the southwestern half to two-thirds of the forecast area. However, the better dynamics on the front edge of the low are expected to be focused over southwest Wyoming and far northeastern Utah by Wednesday afternoon, with at least some threat of strong to severe storms continuing in that area for the afternoon and evening hours. .LONG TERM (After 12Z Thursday)...Moving through the latter half of the week, the closed low system centered over the SoCal region will weaken and lift northward through the Great Basin region. Relatively cooler temperatures associated with the core of this system will help keep surface temperatures moderated while moisture fills back into the eastern Great Basin region, allowing for more expansive coverage of diurnally driven showers and thunderstorms Thursday forward. Though temperatures will be more moderated, should still see near climatological norms in the north and a touch below normal in the south. Heading into the weekend, ensemble guidance maintains solid agreement on yet another closed low system developing over the southern Great Basin/ SoCal region. Anomalous moisture (130-200% of normal) will be confined west of the central mountain spine of Utah through the California coastline, which is where we will see the best support for diurnally driven showers and thunderstorms. That said, there is still disagreement amongst ensembles in just how far inland this upper low will progress by late this weekend/ early next week, accounting for nearly 50% of the variance amongst models. This means that the lower lying eastern valley areas in Utah are some of the more uncertain for precipitation forecasts. For example, EPS and Canadian ensemble mean PWAT anomalies over the eastern portions of the forecast area suggest anywhere from 80-100% of normal values while GEFS mean supports a much more bullish 130-160% of normal. Again, the main driver in how dry or moist the eastern valley areas get during this next cutoff system revolve around how far inland the low progresses and/or how expansive the low becomes. For now, have leaned more toward the EPS and Canadian means as this is where roughly 70-75% of models are trending. However, there are still ~25% of total ensemble members, mainly supported by ~70% of GEFS members, that support a wetter eastern Utah. Eventually, the low will phase with the northern stream and track eastward which will inevitably increase moisture across the region and bring support for more widespread showers and thunderstorms. Until then, should expect coverage of convective showers to gradually expand further south through the weekend. With this "cold" core system, we're likely to see another round of subtle cooling primarily across the western half of the area late in the weekend, potentially bringing this area below normal as a whole. && .AVIATION...KSLC...Light southerly drainage flow will continue through the late morning, becoming a northerly upvalley flow after ~17Z. Shower and thunderstorm development is expected over the surrounding terrain which will generate outflows that flip wind directions after ~21Z. The most likely (~30-40% chance) wind directions will be southeast, southwest, and east. There is a 40-45% chance that storms move over the airfield, which will bring gusty and erratic winds, potentially changing wind direction multiple times within the hour. That said, mainly VFR conditions with CIGs above 7kft AGL are expected. .REST OF UTAH AND SOUTHWEST WYOMING...Mainly VFR conditions are expected area-wide today with showers and thunderstorms favoring northern and eastern Utah, as well as southwest Wyoming. Storms will bring potential for gusty and erratic outflow winds in excess of 35- 40kts, especially across northern Utah and southwest Wyoming. Areas of heavy rain with isolated pockets of hail in stronger storms will likely drop VIS below VFR thresholds. Otherwise, VFR conditions are expected across the region with CIGs remaining at, or above, 7kft AGL. For the southwestern portion of Utah, modest southerly winds with gusts around 20-30kts are expected from ~17-03Z with isolated showers and thunderstorms mainly near KCDC and KBCE. && .FIRE WEATHER...Low pressure currently centered over southern California will move slowly eastward over the next few days, keeping Utah under a southerly flow aloft that will allow some drier air to move in from the south. Today all but southwest Utah will see at least some afternoon and evening showers and thunderstorms, with the best coverage along a boundary over northern Utah. Strong gusty winds will be possible with any storms that develop along with lightning. As the week continues, the intrusion of drier air will keep coverage of showers and thunderstorms limited at best over central and southern Utah as the threat continues over northern Utah. Temperatures will stay near seasonal normals over the next several days. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. 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
Special Weather Statement
National Weather Service Salt Lake City UT
145 PM MDT Tue Jun 6 2023
UTZ101-115-062015-
Western Millard and Juab Counties UT-
Great Salt Lake Desert and Mountains UT-
145 PM MDT Tue Jun 6 2023
...A strong thunderstorm will impact portions of northeastern
Millard...central Juab and southeastern Tooele Counties through 215
PM MDT...
At 144 PM MDT, Doppler radar was tracking a strong thunderstorm 23
miles northwest of Delta, moving north at 30 mph.
HAZARD...Wind gusts up to 50 mph and penny 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.
This storm will remain over mainly rural areas of northeastern
Millard...central Juab and southeastern Tooele Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3955 11274 3955 11297 3987 11317 3996 11303
3994 11280
TIME...MOT...LOC 1944Z 164DEG 27KT 3961 11287
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
STWSpecial Weather Statement
National Weather Service Salt Lake City UT
206 PM MDT Tue Jun 6 2023
UTZ110-112-WYZ021-062030-
Western Uinta Mountains UT-Wasatch Mountains I-80 North UT-
Southwest Wyoming WY-
206 PM MDT Tue Jun 6 2023
...A strong thunderstorm will impact portions of southeastern Rich...
northeastern Morgan...north central Summit and southwestern Uinta
Counties through 230 PM MDT...
At 206 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles south of Evanston, moving north at 15 mph.
HAZARD...Wind gusts up to 50 mph and penny 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...
Evanston, Wahsatch and Castle Rock.
This includes Interstate 80 in Utah between mile markers 183 and 196.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4100 11098 4100 11116 4123 11126 4128 11107
4124 11088
TIME...MOT...LOC 2006Z 178DEG 13KT 4103 11106
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
STWThe Salt Lake City radar (KMTX), 128 km away, was scanning. The volume nearest the first event began at 20:16 UTC.
17 thunderstorm wind, 5 high wind. Local standard time, as filed.
A wind gust of 60 mph was recorded at the White Sage mesonet site.
A wind gust of 59 mph was recorded at the Camel Back Mountain mesonet site.
A wind gust of 61 mph was recorded at the Salt Flats mesonet site.
A wind gust of 58 mph was recorded at the Wildcat Mountain mesonet site.
A wind gust of 70 mph was recorded at the Arnosa mesonet site. Other wind gusts included 64 mph at the I-80 @ mp 29 site and 61 mph at the Wendover Port of Entry site.
A wind gust of 59 mph was recorded at the Bonneville Salt Flats mesonet site.
A wind gust of 65 mph was recorded at the Fremont Island - Miller Hill mesonet site.
A wind gust of 65 mph was recorded at the Fremont Island - Miller Hill mesonet site.
A wind gust of 58 mph was recorded at the Hat Island mesonet site.
A wind gust of 66 mph was recorded at the UR305 mesonet site.
A wind gust of 69 mph was recorded at the UR308 mesonet site.
A wind gust of 62 mph was recorded at the SR-30 mesonet site.
A wind gust of 62 mph was recorded at the SR-30 mesonet site.
A wind gust of 60 mph was recorded at the Rosebud mesonet site.
A wind gust of 61 mph was recorded at the Hansel Valley mesonet site.
A wind gust of 70 mph was recorded at the Arnosa mesonet site. Other wind gusts included 64 mph at the I-80 @ mp 29 site and 61 mph at the Wendover Port of Entry site.
A wind gust of 58 mph was recorded at the I-15 at MP 369 mesonet site.
A wind gust of 58 mph was recorded at the I-15 at MP 369 mesonet site.
A wind gust of 61 mph was recorded by the Delta Municipal Airport AWOS.
A wind gust of 61 mph was recorded at the Delta Municipal Airport AWOS.
A wind gust of 61 mph was recorded at the Murray's Hill mesonet site.
A wind gust of 61 mph was recorded at the SR-30 mesonet site.
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, June 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: 1196047, 1196048, 1196049, 1196051, 1196864, 1196055, 1111361, 1196865, 1196057, 1196058, 1196060, 1111362, 1196061, 1196062, 1196065, 1111359, 1111360, 1196866, 1111363, 1196868, 1196066, 1196067.