Southern Utahns, meanwhile, expected mid- to upper-90s on Tuesday, down a few degrees from triple-digit temperatures forecast for Monday. Mountain thunderstorms but little rain were expected in Utah's Dixie, too.
Still, the National Weather Service left in place a Hazardous Weather Outlook for the western two-thirds of the state, noting that locally heavy rainstorms could trigger flash flooding in the region's slot canyons and on mountain slopes previously denuded by wildfires.
Forecasters also issued a Flash Flood Warning through 4 p.m. Monday for southcentral Utah's Wayne County, including Capitol Reef National Park, the Capitol Gorge and Grand Wash areas.
At about 3 p.m., the weather service confirmed there was flash flooding at Capitol Gorge, with a warning to avoid the area.
The Utah Division of Air Quality rated the atmosphere at "Green," or healthy statewide, while the Intermountain Allergy & Asthma web site warned that chenopod and mold levels were "high" on its pollen index.
Salt Lake City's high on Tuesday was expected to hit 95, down a bit from Monday's forecast for 98 degrees; Ogden looked for 92 and 94 degrees, respectively; Provo 93 and 95; Logan 93 and 94; Wendover 91 and 94; Duchesne 86 and 88; Cedar City 82 and 89; St. George 94 and 101; and Moab 94 and 95 degrees.