textproduct: Salt Lake City

KEY MESSAGES, Issued 1040 PM MDT Sun Jul 19 2026

- Daily chances for showers and thunderstorms across most of Utah and southwest Wyoming continue through this upcoming week as monsoonal moisture remains in place.

- Flash flooding remains a concern across the region through at least Thursday, especially across southern Utah on Tuesday and northern Utah and southwest Wyoming on Wednesday.

- Hot daytime temperatures and warm overnight lows will lead to widespread Major HeatRisk across much of the Wasatch Front and northwest Utah on Monday.

DISCUSSION, Issued 1040 PM MDT Sun Jul 19 2026

Showers are once again waning tonight across the region outside of some lingering convection across southeast Utah that should taper off just after midnight. A typical monsoonal pattern remains in place, defined by a broad ridge overhead. The ridge is expected to amplify overhead on Monday, with southeasterly flow aloft increasing across the region as a result. While scattered showers develop once again Monday afternoon as monsoon moisture remains in place, coverage will be a bit more isolated with stronger steering flow aloft. As such, the flash flood risk is lower across the region tomorrow, though a Marginal Risk (level 1/4) for excessive rainfall across most of Utah and southwest Wyoming still exists, given flash flooding remains a threat if a strong cell develops over sensitive terrain.

The amplifying ridge on Monday will also yield a slight bump in temperatures, with highs for northern Utah valleys breaking the century mark once again. Given warm overnight lows Monday morning, this will exacerbate heat impacts and raise the risk for heat illnesses mainly across the Wasatch Front and Great Salt Lake Desert.

The flash flood risk rises again Tuesday through Wednesday as the ridge flattens in response to a trough moving into the Pacific Northwest, bringing an additional surge of monsoonal moisture. Main concern for Tuesday exists across southern Utah, while the threat shifts across northern Utah and southwest Wyoming on Wednesday as monsoonal moisture spreads northward. While moisture lingers through the remainder of the week across the region, the broad ridge begins to slide west through the latter half of the week, introducing drier, more stable conditions which will limit the potential for the daily convection chances to continue into the weekend.

AVIATION

KSLC...Southeasterly winds will continue through the morning before transitioning to northwesterly between 18-20z. Isolated thunderstorms will begin to develop over the Wasatch after 19z, with the highest chance of a couple of rogue storms moving over the terminal between 21-01z (15-20% chance). These showers may be capable of producing gusty and erratic outflow winds, potentially including an earlier switch to southerly.

REST OF UTAH AND SOUTHWEST WYOMING...Scattered showers and thunderstorms will develop across much of the area after 18-19z, first develop across higher terrain. These storms may be capable of producing heavy rain, gusty outflow winds, and brief VIS reductions. While the strongest storms will likely diminish by 02z, showers may continue into the overnight hours, particularly across southern Utah.

FIRE WEATHER, Issued 438 AM MDT Mon Jul 20 2026

Monsoonal moisture remains in place resulting in daily afternoon thunderstorm chances through at least Thursday statewide. Scattered showers and isolated thunderstorms are even possible Monday night across southern Utah and Tuesday night across much of the state. A secondary push of moisture late Tuesday into Wednesday will act to further increase humidities before a slow drying trend later in the week. These storms will continue to be capable of producing heavy rain, with elevated chances for wetting rain particularly across higher terrain. Later in the week, this threat could turn into more of a strong outflow wind threat, though this depends on how long the deep moisture is able to hang on.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Heat Advisory from noon today to midnight MDT tonight for UTZ101>105.

WY...None.