textproduct: Salt Lake City

KEY MESSAGES, Issued 940 PM MDT Mon Jun 15 2026

- High pressure will bring hot and very dry conditions through the first half of the week, with the hottest temperatures of the season across areas like St. George and Glen Canyon National Recreation area.

- Gusty northwest winds combined with a hot and very dry airmass will result in critical fire weather conditions through Wednesday across portions of eastern, central and southern Utah where fuels are critically dry.

DISCUSSION, Issued 940 PM MDT Mon Jun 15 2026

Mid level ridging will continue to slowly build inland across the Sierra and western Great Basin region through Wednesday, spreading a hot and very dry airmass across the forecast area. Daytime temperatures will trend a few degrees warmer Tuesday, reaching the low 90s along much of the Wasatch Front, and exceeding 105F across lower Washington County, Zion Canyon, and lower elevations of the Glen Canyon Recreation area. With this ridge remaining centered to the west, a general northwest flow will reside across the area as well allowing for gusty northwest winds, and resulting in critical fire weather conditions where fuels are sufficiently dry. This flow will be enhanced somewhat on Wednesday with a shortwave passing to the north. See the fire weather discussion for more information.

This ridge will shift eastward across the forecast area Thursday resulting in lighter winds, but maintaining a very dry airmass. As this ridge continues east, southwesterly flow will spread across the forecast area Friday shifting the fire weather threat to western Utah. An upper trough will translate into the Great Basin Friday through Saturday, resulting in a threat for high based convection mainly across the north. Lingering moisture may keep this convective threat going into Sunday.

AVIATION, Issued 940 PM MDT Mon Jun 15 2026

KSLC, Issued 940 PM MDT Mon Jun 15 2026... VFR conditions will persist at the KSLC terminal beneath clear skies with diurnal wind shifts expected. Gusty winds will develop in the afternoon hours resulting in gusts up to 20kts.

REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will persist at all terminals beneath clear skies with diurnal wind shifts expected. Gusty winds are expected to develop across all sites tomorrow afternoon with most seeing gusts up to 20kts, though KEVW may see gusts to 30kts.

FIRE WEATHER

A warm and dry airmass will settle into the area into late week. Max temperatures each day will largely range from 5-10 degrees above normal. Afternoon relative humidities will dip into the single digits in many valley areas during this time, with poor overnight recoveries. With high pressure to the west, a northwest flow will persist over the area, strengthening through Wednesday. These increasing winds, combined with the dry airmass in place, will create critical fire weather conditions. As high pressure shifts overhead, winds will decrease for Thursday. However, winds will increase again by Friday, this time from the southwest, as the high pressure shifts east and a weather disturbance approaches Utah. This disturbance will bring some high-based showers and a potential or at least isolated dry lightning to northern Utah over the weekend.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Red Flag Warning until 9 PM MDT Wednesday for UTZ482-488-489-493.

Red Flag Warning from noon today to 9 PM MDT Wednesday for UTZ484-496.

Fire Weather Watch from Wednesday afternoon through Wednesday evening for UTZ494-498.

WY...None.