textproduct: Salt Lake City

KEY MESSAGES, Issued 959 PM MDT Mon Jul 13 2026

- Overnight temperatures will remain elevated across the region, particularly across northern Utah, yielding continued heat health impacts through Tuesday morning.

- Monsoonal moisture will become widespread across the area by Tuesday afternoon. The moisture will then remain in place through at least early next week, bringing a daily threat of showers and thunderstorms capable of producing heavy rain that could lead to flash flooding.

- Temperatures will gradually become less warm through the week, with highs near seasonal normals for southern Utah and up to 5F above seasonal normals for northern portions of the area by the weekend.

DISCUSSION, Issued 959 PM MDT Mon Jul 13 2026

High pressure is centered over the central United States this evening, putting Utah and southwest Wyoming under a southerly flow aloft. In this flow, monsoonal moisture continues to increase and spread northward across the area, with satellite deriver PWs in the 0.8 to 1.0 inch range common across all but northeastern portions of the area. Showers and thunderstorms developed earlier today, primarily scattered in nature and focused over the higher terrain. These storms produced some strong winds gusts in excess of 40 mph as well as isolated flash flooding. Some storms continue this evening over southwest Utah, but are expected to dissipate overnight In the moist airmass, low temperatures will remain elevated overnight, and this will keep a lingering threat of heat related impacts for northern Utah through Tuesday morning.

By Tuesday afternoon, guidance indicates PW values as high as 1.2 inch across the area. However, the flow aloft is expected to become generally light and variable for Wednesday through the end of the week as high pressure retrogrades. Thus, will see little additional advection of moisture into the area, but the existing moisture is expected to remain in place through at least early next week. With this in mind, anticipate the daily development of afternoon/evening showers and thunderstorms primarily focused over the higher terrain, with the greatest coverage over southern Utah. Any storms that develop will be capable of producing heavy rain that could lead to flash flooding, particularly in prone areas like burn scars, slot canyons, and normally dry washes.

With regard to temperatures, anticipating maxes to become slowly less hot during the course of the week, with the greatest change in temperature anticipated over southern Utah where maxes should drop back to near or just below seasonal normals. Over northern portions of the area, maxes should remain up to 5F above climo.

AVIATION

KSLC...VFR conditions will be maintained over the KSLC terminal through the valid TAF period with periods of mid and high-level cloud cover. Southeast winds will transition to northwesterly during the 18-19Z timeframe. After 00Z winds will likely be driven by outflows from area showers and thunderstorms, and will be gusty and erratic at times.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will prevail at area TAF sites through the morning hours with light, terrain driven winds. Terrain driven showers and thunderstorms will develop by early afternoon, potentially impacting TAF sites mainly from I-80 southward later this afternoon and evening. Gusty and erratic outflow winds will be common with these storms.

FIRE WEATHER, Issued 420 AM MDT Tue Jul 14 2026

Monsoon moisture spreading northward into the region will bring an increase in daytime RH along with improved overnight recovery. The exception will be eastern zones such as 489 and 494, where although RH will trend higher, values will again fall below 15 percent this afternoon. This moisture will also fuel scattered to numerous showers and thunderstorms this afternoon and evening. A mixture of wet and dry thunderstorms is expected across northern Utah, while more numerous showers and thunderstorms capable of wetting ran can be expected across central and southern Utah. This moisture will continue to increase through the remainder of the week resulting in elevated daytime RH with good overnight recovery, along with daily showers and thunderstorms across the area.

SLC WATCHES/WARNINGS/ADVISORIES

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

WY...None.