textproduct: Salt Lake City

KEY MESSAGES, Issued 1058 PM MDT Sat Aug 1 2026

- Another day of extreme temperatures will bring an increased risk of heat-related illness to much of the region. See the latest Extreme Heat Warnings and Heat Advisories for more information.

- A dry cold front will move through the area late Sunday into Monday. Increasing winds ahead of the front will bring areas of critical fire weather conditions to much of the state Sunday afternoon and evening.

- Another round of elevated to locally critical fire weather conditions will impact eastern and south-central Utah Monday. Red Flag Warnings may need to be extended.

- Critical fire weather conditions Sunday may exasperate conditions near current large wildfires across Utah. See the latest information from public safety officials if near these wildfires.

- The next monsoon surge is increasing in probability to impact southern Utah as early as Friday.

DISCUSSION, Issued 1058 PM MDT Sat Aug 1 2026

Strong high pressure remains entrenched across the Desert Southwest this evening, with widespread near record to record temperatures recorded across the region today. As a Pacific trough shifting into the Northwest Sunday, heights will fall across northern Utah. A dry cold front will gradually shift southward into northern Utah Sunday evening, reaching central Utah early to mid Monday, before stalling. Southern Utah should largely remain south of this boundary until later Tuesday, when the upper trough finally pushes into the High Plains.

Excessive Heat Warnings and Heat Advisories remain in place across much of the region. The only change to this suite of products was to extend eastern Box Elder County through Sunday. With little recovery overnight and temperatures only falling a few degrees Sunday, the threat of heat-related illness will continue in this area.

Gusty west to southwest winds will develop Sunday afternoon south of the dry cold front and bring critical fire weather conditions to a large part of the state. For those near large wildfires including Widemouth 2, continue to monitor information from public safety officials if near the fire. Additional fire starts are likely. Please be extremely careful with any sources of ignition. Red Flag Warnings continue for much of the region...and for eastern and southern areas that remain ahead of the front and/or downslope behind the front, Red Flag Warnings may need to be extended into Monday.

Ensemble members continue to indicate an increasing probability a monsoon surge will reach southern Utah by Saturday. The vast majority of members indicate precipitable water values will exceed 75th to 85th percentile later Saturday into Sunday. Something to watch...but pretty far out there.

AVIATION, Issued 1058 PM MDT Sat Aug 1 2026

KSLC, Issued 1058 PM MDT Sat Aug 1 2026... Southeasterly winds will likely prevail through the night, but may become light and variable after 12z before transitioning to northwesterly between 17-18z. VFR conditions will likely prevail, though wildfire smoke from local and regional wildfires moving into the region may cause slantwise VIS reductions.

REST OF UTAH AND SOUTHWEST WYOMING...Winds will remain largely light and terrain-driven overnight, though a weak boundary will produce a period of breezy northerly winds tonight across far northwest/north- central Utah. VFR conditions will likely prevail outside of any wildfire smoke from both local and regional fires, which could produce slantwise VIS reductions and hazy skies.

FIRE WEATHER

Strong high pressure in place will maintain hot and dry conditions throughout the area today, with afternoon min humidities below 10 percent in the valleys and below 15 percent in the mountains. A storm system moving by to the north will send a dry cold front into northern Utah tonight into Monday morning. Ahead of this front, increasing winds can be expected across much of Utah which, when combined with the dry airmass in place, will result in critical fire weather conditions. Behind the cold front tomorrow, temperatures will trend cooler, closer to climatological normals across northern Utah, but remaining above normal across southern Utah. Humidities will only see a slight increase tomorrow, and continued gusty postfrontal winds will maintain critical fire weather conditions across northeast and east- central Utah where downsloping winds will be strongest.

As the storm track to the north looks to remain active through midweek, additional periods of gusty winds may continue to bring critical fire weather conditions to the area. Otherwise, temperatures will rebound mid to late week. The potential continues to exist for moisture to return to southern Utah late week, but northern Utah may have to wait until early next week.

SLC WATCHES/WARNINGS/ADVISORIES

UT...Heat Advisory until 9 PM MDT this evening for UTZ101-103-114>116- 120>122.

Extreme Heat Warning until 9 PM MDT this evening for UTZ102- 104>106-123-124-128>131.

Red Flag Warning from 1 PM this afternoon to 10 PM MDT this evening for UTZ479-488-492-493-495>498.

Red Flag Warning from 1 PM this afternoon to 10 PM MDT Monday for UTZ481>484.

Red Flag Warning from noon to 10 PM MDT Monday for UTZ489.

WY...Red Flag Warning from 1 PM this afternoon to 9 PM MDT Monday for WYZ277.