Utah forecast: Thunder, rain and continued heat

We've got thunder, we've got rain — and we've still got most of the heat.

While high temperatures Tuesday and Wednesday along the Wasatch Front were forecast in the low- to mid-90s and southern Utah looked for the mercury to flutter just above 100 degrees, roughly half the state also was under a Flash Flood Watch from noon Tuesday through the evening.

Potentially heavy rain showers threatened to overflow streams and rivers, fill dry washes and slot canyons and pour down slopes recently denuded by wildfires in an area roughly the shape of a triangle extending southwest, south and southeast of Provo to the Arizona and Colorado borders.

Salt Lake City, having topped 100 on Monday for the first time this year, expected a high of 89 degrees on Wednesday, down about 5 degrees from Tuesday's expectations.

The Utah Division of Air Quality rated most of the state, including Salt Lake, Davis, Weber and Utah counties, at "yellow," or compromised. Cache, Washington, Carbon, Duchesne and Uintah counties were the only areas earning "green" or healthy status.

The Intermountain Allergy & Asthma website listed only mold at "high" on its pollen index, while grass was "moderate" and all other allergens were graded as "low" on Monday.

For more extensive forecast information, check the Tribune's weather page at sltrib.com/weather.

remims@sltrib.com

Twitter: @remims