Drier air is trending through Thursday for Utah, according to a fire weather planning forecast issued by the National Weather Service Salt Lake City on August 25, 2026. While daily coverage of showers and thunderstorms is expected to decrease through Thursday, moisture and instability are projected to increase beginning Friday.
High pressure will remain over the area through at least Thursday. Lingering monsoon moisture will allow for the daily development of showers and thunderstorms each afternoon and evening, with limited drift off of the terrain. Any storms that develop may be capable of producing gusty and erratic winds.
Relative humidity values for the valleys of western and southern Utah are expected to move closer to critical values for Wednesday and Thursday, although winds will remain generally light. A ridge is expected to track east of the area from Friday through early next week. A Pacific Northwest system is expected to provide increasing southerly winds from Friday into Saturday, drawing additional moisture northward.
A cold front arriving on Saturday is expected to bring lower temperatures and an increased potential for convection, particularly for northern Utah. The absence of the persistent ridge is expected to bring a more active pattern beginning early next week, though confidence regarding specific details remains low at this time.
Thunderstorms may imply strong, gusty, and erratic winds. All winds reported are 20-foot, 10-minute averages.
