textproduct: Salt Lake City

KEY MESSAGES, Issued 249 PM MDT Thu Aug 6 2026

- Dangerous heat will impact much of the state through Saturday across southern Utah, Sunday the remainder of the Utah. Those without access to cooling or proper hydration will be most at risk for heat-related illness. With temperatures remaining elevated overnight, there will be little recovery. Heat stress is cumulative.

- Critical fire weather conditions will develop across southern Utah Saturday as widely scattered thunderstorms develop after a long duration period of very dry, very hot conditions. This will spread north and east across much of the remainder of southern Utah Sunday.

- A marginal risk of excessive rainfall has been outlooked across southern Utah Saturday, shifting north and east Sunday.

DISCUSSION, Issued 1050 PM MDT Thu Aug 6 2026

Forecast remains on track for an area of high pressure to build eastward into the region over the next few days, bringing increasing heat areawide with an influx of moisture to follow. Across Utah and southwest Wyoming, the increasing temperature trend is expected to peak on Friday/ Saturday, with temperatures slowly decreasing through the weekend and into early next week. Along the Wasatch Front and remainder of the I-15 corridor through Cedar City, high temperatures will be back into the upper-90s (Cedar City area) and the low-100s in the Salt Lake City, Ogden, and Provo area. By noon on Friday, a series of heat advisories and extreme heat warnings will go into effect across northern Utah, with existing warnings and advisories in southern Utah remaining in effect.

Mid-level moisture will remain in place across the southern half of Utah, as was the case today. As was evident with today, high- based showers and thunderstorms will bring potential for strong outflow winds in excess of 40-45 mph. With mid-level moisture spreading a skosh farther northward, would anticipate coverage of these showers to extend into Millard County Friday afternoon. Though a majority of these showers and thunderstorms will be largely dry, little steering flow in the lower to middle portions of the atmosphere will allow for slow moving storms, thus bringing potential for isolated heavy rainfall in near-stationary storms. While the threat of flash flooding in the typical areas is quite low, it is not zero.

The lower levels of the atmosphere will remain fairly dry through the weekend until the center of the high pressure positions itself over the Four Corners region, which will help to advect an influx of lower level moisture into the forecast area. Given the current model guidance, would anticipate this to occur around the mid-week timeframe (Wednesday/ Thursday), with high-based largely dry showers and thunderstorms each afternoon until then. This pattern looks to remain solidly in place thereafter.

AVIATION

KSLC...VFR conditions will prevail at the SLC terminal through the day, though there is a chance of visibilities briefly dropping into the MVFR range at times just before sunset and after sunrise given wildfire smoke lingering across the region. Southerly winds are expected to shift to the northwest between 18Z and 20Z.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions are expected to prevail at the SLC terminal through the day, though lingering wildfire smoke could produce slantwise VIS reductions down to MVFR across northern and central Utah. Sites near local wildfires could see further reductions. Isolated to widely scattered showers and thunderstorms are expected again over southwest Utah this afternoon into the early evening. Any storms that develop will be capable of producing gusty and erratic thunderstorms winds as well as occasional lightning.

FIRE WEATHER, Issued 441 AM MDT Fri Aug 7 2026

High pressure centered over Utah is bringing continued hot and dry conditions to much of the state. However, some moisture has spread into southwest Utah, which will bring another round of isolated to widely scattered showers showers and thunderstorms, some of which could produce dry lightning. The ridge is expected to track eastward to the Four Corners Saturday into Sunday, and this will allow the monsoon moisture to spread across much of the remainder of the week for early next week. This will bring improving relative humidity values, increased coverage of lightning, and the potential for wetting rainfall.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Extreme Heat Warning from noon today to midnight MDT Sunday night for UTZ101-102-104-105-115-120-121.

Heat Advisory from noon today to midnight MDT Sunday night for UTZ103-106-107-114-116.

Heat Advisory until 9 PM MDT Saturday for UTZ118-119-122-126-127.

Extreme Heat Warning until 9 PM MDT Saturday for UTZ123-124- 128>131.

WY...Red Flag Warning from noon today to 9 PM MDT this evening for WYZ277.