Monsoon moisture is expected to persist across Utah through the weekend and into early next week, bringing a daily threat of showers and thunderstorms that could produce heavy rain, flash flooding, lightning, and gusty winds, according to the National Weather Service.
Monsoon Moisture Risks
The National Weather Service Salt Lake City issued a forecast on Friday, Aug. 28, 2026, indicating that monsoon moisture will remain in place through the weekend and into the early part of next week. This moisture is expected to bring daily threats of showers and thunderstorms, primarily during the afternoon and early evening hours.
Potential Weather Hazards
Meteorologists warned that any storms that develop during this period could produce heavy rain. Such rainfall has the potential to trigger flash flooding, frequent lightning, and gusty thunderstorm winds. The National Weather Service advised individuals participating in outdoor activities to remain aware, particularly those in flood-prone areas.
Northern Utah Forecast
In Northern Utah, the weather outlook for Saturday, Aug. 29, shows thunderstorms for Salt Lake City, Tooele, Ogden, Brigham City, Park City, Heber, Randolph, Alta, Bear River RS, and Mirror Lake. Salt Lake City is forecasted to see a high of 80 degrees with a low of 65 degrees, while Tooele expects a high of 79 degrees and a low of 63 degrees.
Mountain Region Weather
The forecast for Ogden on Saturday, Aug. 29, indicates thunderstorms with a high of 78 degrees and a low of 65 degrees. Brigham City is also expected to experience thunderstorms with a high of 77 degrees and a low of 59 degrees. In the mountain regions, Park City is forecasted to see thunderstorms with a high of 73 degrees and a low of 53 degrees, while Heber is expected to have thunderstorms with a high of 80 degrees and a low of 51 degrees.
Weekend Forecast Trends
Looking toward Sunday, Aug. 30, thunderstorms are expected to continue in Salt Lake City, Tooele, Provo, Park City, Heber, Randolph, Alta, Bear River RS, and Mirror Lake. In Salt Lake City, the high is expected to reach 80 degrees with a low of 61 degrees. Tooele is forecasted to have a high of 78 degrees and a low of 61 degrees.
Southern Utah Conditions
In Southern Utah, the weather patterns vary. St. George is forecasted to have sunny conditions on Saturday, Aug. 29, with a high of 101 degrees and a low of 76 degrees. On Sunday, Aug. 30, St. George is expected to remain sunny with a high of 97 degrees and a low of 73 degrees. Other southern locations like Kanab are expected to see thunderstorms on Saturday with a high of 90 degrees and a low of 64 degrees.
Regional Heat Warning
The National Weather Service also noted that dangerous heat persists across the Desert Southwest through this weekend. This heat threat extends across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for portions of Texas, Oklahoma, Louisiana, New Mexico, and Arizona.
