Isolated thunderstorm chances linger along the Wasatch Front and I-15 corridor on Thursday, Sept. 17, after a late-season monsoon system pushed storms across the region a day earlier.

The National Weather Service forecast for Lehi had called for a 70% chance of precipitation Wednesday, with thunderstorms possible before noon and again after noon. The high reached near 83°F. Wednesday night carried the same 70% chance, with storms likely after 3 a.m.

The Storm Prediction Center designated parts of the Wasatch Front under a Marginal risk, the lowest of five severe weather levels, for Wednesday afternoon. ABC4 meteorologist Cedric Haynes reported that the monsoon moisture made strong storms possible along the Wasatch Front, with gusty winds and large hail in the strongest cells.

The heaviest confirmed impacts fell in eastern Utah. The NWS office in Grand Junction issued a Flash Flood Warning for South Central Grand County on Wednesday at 2:54 p.m. MDT. Floodwaters also hit Emery and Grand counties on Tuesday, Sept. 15, affecting areas around Little Wildhorse Canyon and Goblin Valley, according to ABC4.

KSL meteorologist Matt Johnson wrote Wednesday that the trend points toward dry air moving in along the Wasatch Front for Saturday and Sunday. A cold front arriving Friday, Sept. 18, is expected to bring highs in the upper 70s and lower 80s through the weekend, according to ABC4.