textproduct: Salt Lake City

KEY MESSAGES

- The heat wave over the area will peak on Sunday, with many daily, monthly, and all-time records being challenged, particularly over northern portions of the area.

- Temperatures will gradually become less hot during the upcoming week as monsoonal moisture moves into the area. This will increase the threat of precipitation and thus flash flooding, particularly over southern Utah, for much of next week.

DISCUSSION

A strong ridge parked over Utah and southwest Wyoming is bringing dry and very hot conditions. Maxes averaged up to 10F above seasonal normals, which means most valleys got close to or exceeded 100F for their high temperature today. Though the ridge will shift east tomorrow, some additional hot air will continue to advect in, with guidance indicating 700 mb temps in the +20 to +22C range during the afternoon, among the highest 700mb temperatures that have been observed over the area. Predictably, this will likely lead to many daily records being broken, particularly over northern portions of the area where the airmass is most abnormally warm. Locations like Logan and Evanston have a 60-75 percent chance of exceeding their all-time record high temperatures. There is a lower chance of this happening in farther south locations like Salt Lake City and Park City, more like a 10-30 percent chance. Still, temperatures this high will bring an increased threat of heat related illness to most valley and mountain valley locations across the area, and Extreme Heat Warnings remain in effect.

For Monday, the Extreme Heat Warnings will continue for northern portions of the area. Monsoonal moisture will start to advect northward Sunday evening, and this increase in moisture will impact temperature more significantly over southern Utah. Though northern Utah will be a bit less hot, the heightened threat of heat related illness remains. The return of moisture will also bring increasing coverage of showers and thunderstorms through the first part of the week. This is mostly good news for the wildfire situation across the state, but will bring an increased threat of flash flooding, particularly to southern Utah. Though the flow will most likely become light for the middle and latter part of the week, limiting the advection of additional moisture, the deep moisture already over the area will remain in place, with high confidence it will stay in place for the remainder of the upcoming week.

AVIATION, Issued 552 PM MDT Sat Jul 11 2026

KSLC...VFR conditions prevail over the KSLC terminal through the valid TAF period alongside light, diurnally driven winds. Clear skies will persist through the evening, with a few high level clouds increasing overnight. Northwesterly winds will transition back to a southeasterly wind after sundown, remaining in place through the overnight hours.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will prevail through the TAF period areawide. Areas of high-based showers forming along the highest terrain in southern, central, and northeastern Utah will dissipate after sundown, leading to largely clear skies overnight. Winds will remain terrain driven at all terminals through the evening and overnight hours.

FIRE WEATHER

High pressure centered over Utah will bring dry and very hot conditions through Sunday, with the record warmth lingering over northern Utah for Monday. By Sunday night, monsoonal moisture will start to advect northward into southern Utah, with the flow of moisture continuing through the middle of the week. This will bring less hot temperatures, increasing relative humidity values, better overnight recoveries, and an increasing chance of wetting rains. This will, however, bring a heightened threat of flash flooding for much of the remainder of the week, particularly over southern Utah.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Extreme Heat Warning until 6 AM MDT Tuesday for UTZ101>108-114- 116-118>121.

Extreme Heat Warning until 6 AM MDT Monday for UTZ115-122- 128>131.

WY...Extreme Heat Warning until 9 PM MDT Monday for WYZ021.