Utah faces a week of rising temperatures and daily afternoon thunderstorms, according to the National Weather Service. While high pressure is expected to drive daytime highs significantly above seasonal averages through Friday, a shifting weather pattern may bring cooler and wetter conditions by the weekend.
Increasing Heat and Moisture
Rising temperatures and moisture-driven storms are the primary focus for the region this week. The National Weather Service in Grand Junction reported Tuesday that daytime highs will run approximately 5 to 10 degrees above normal to start the week and are expected to increase gradually through Friday.
As the high pressure system slides westward into the Desert Southwest, a gradual warming and slight drying trend is expected. However, surface moisture is forecasted to linger under the high pressure, with precipitable water values remaining between 100% and 150% of normal through the end of the week.
Thunderstorm and Flood Risks
The presence of lingering moisture and limited dynamic forcing means that showers and thunderstorms will rely on orographic lift to form. This process is expected to cause activity to fire off higher terrain each afternoon through the end of the week.
Weather officials warned that frequent lightning, gusty winds, and localized heavy rain are possible from any storms that form. If storms form over sensitive areas or train over the same location, there is a risk of flash flooding, including potential debris flows associated with recent burn scars.
Severe Storm Outlook
The Storm Prediction Center issued a convective outlook for the region, indicating an enhanced risk of severe storms for Day 1. The forecast suggests a slight risk of severe storms for Day 2 and Day 3. Looking further ahead, the Day 4-8 outlook indicates a potential for severe thunderstorms across a broad area, with probabilities ranging from 15% to 30% or higher for any specific point within 25 miles.
Weekend Pattern Shift
A significant pattern shift is possible late this week and into the coming weekend as a deep trough approaches the West Coast. The tightening pressure gradient ahead of this trough is expected to lead to stronger winds.
Meteorologists noted that guidance is currently in poor agreement regarding the weekend's exact conditions. While some models favor wetter conditions, others suggest drier air may push in, which could create localized Critical Fire Weather conditions. Currently, however, the blended guidance indicates that troughing over the western United States through the weekend will introduce a cooler and wetter pattern, with temperatures potentially falling a few degrees below normal as the region moves into early September.
Recent Climate Summary
In the Salt Lake City area, recent weather data highlights the recent heat and precipitation trends. On August 24, 2026, the maximum temperature reached 95 degrees Fahrenheit, which is 5 degrees above the normal maximum of 90 degrees. The minimum temperature recorded was 70 degrees, 5 degrees above the normal minimum of 65 degrees.
Precipitation for August 24 totaled 0.06 inches, representing a trace amount above the normal value of 0.02 inches. The total precipitation for the month of August to date stands at 1.30 inches, which is 0.88 inches above the normal value of 0.42 inches.
Aviation Forecast Details
Aviation forecasts through 18Z Wednesday indicate that showers and thunderstorms will begin shortly and persist through sunset. These convective activities are expected to favor higher terrain. Primary aviation concerns include lightning, gusty outflow winds around 25 knots, and brief periods of moderate IFR conditions due to heavy rainfall. Otherwise, VFR conditions are expected to prevail.
