Salt Lake City could turn cooler Saturday as parts of Utah face another day with possible isolated to scattered afternoon thunderstorms.
Saturday Outlook
Northwest winds are possible, and isolated to scattered afternoon thunderstorms are in the forecast for parts of Utah, according to National Weather Service. No watches, warnings or advisories are listed for Utah, as reported by National Weather Service Salt Lake City.
A previous Hoodline forecast also called for a cooler Saturday. This update uses the current National Weather Service outlook as its primary source.
Sunday and an Unsettled Workweek
Why Storms Can Still Occur in September
According to the National Weather Service Grand Junction office, the Southwest Monsoon ends by late August in most years but can last as late as October. That means isolated September thunderstorms can still occur in parts of Utah even as conditions begin shifting toward fall. The available climate information here establishes temperature normals and records, rather than measuring how common thunderstorms or measurable rain are around Salt Lake City and northern Utah. For outdoor plans, the National Weather Service advises moving immediately into a substantial building or an enclosed metal-topped vehicle when thunder is heard and remaining sheltered for at least 30 minutes after the last thunder.
How the Temperatures Compare
According to the National Weather Service Salt Lake City climate report, the normal high and low for September 19 are 79 and 55 degrees Fahrenheit, while the daily records are 97 degrees in 1956 and 31 degrees in 1964. For context, NOAA's National Centers for Environmental Information defines a climate normal as a 30-year average calculated over a uniform period. Those figures provide a temperature benchmark for the forecast period, but the specific outlook here does not include a forecast high or low with which to make a precise comparison. The cited climate information also supplies temperature normals, records and a September 18 precipitation normal of 0.03 inches.
High pressure is expected over Utah Sunday, followed by increasing moisture and unsettled conditions from late Monday into Tuesday.
Unsettled Conditions May Persist
The forecast may remain unsettled through much of the upcoming week.
For Saturday plans, keep an eye on the sky and bring a light layer for the cooler air. If thunder is heard, move indoors.
