Southern Utahns looked for highs in the 40-50 degree range Thursday and Friday with overnight lows in single-digits to the 20s.
There was no snow forecast for anywhere in the state, meaning the pollution-trapping inversions plaguing the state's urban valleys were expected to only get worse.
The Utah Division of Air Quality warned that Utahns living in the "Red" zones should take care to avoid extended outdoor activity if they are elderly, young children or afflicted with heart or lung disease. Motorists were urged to stay home or use mass transit rather than drive, and wood-burning stove use was discouraged or banned, depending on the location.
The Utah Avalanche Center rated the state's mountains at "moderate" risk for dangerous snow slides.
Salt Lake City's forecast called for a high Thursday of 27, followed by an overnight low of 10 and a daytime high Friday of 28 degrees; Ogden looked for 23, 9 and 26 degrees, respectively; Provo 26, 11 and 30; Logan 20, -3 and 20; Wendover 20, 2 and 20; Duchesne 13, -5 and 17; Cedar City 34, 1 and 37; St. George 50, 26 and 51; and Moab 15, 0 and 21 degrees.