This is an archived article that was published on sltrib.com in 2014, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.
Here comes the smog.
Many of northern Utah's urban valleys, capped by pollution-trapping air inversions due to a continuing high pressure front aloft, were graded "orange," or with seriously compromised, unhealthy air quality heading toward the weekend.
The Utah Division of Air Quality does not expect the pollution in the Wasatch Front's metro areas to improve anytime soon, either, with the next storm system not expected until the middle of next week, at the earliest.
In Salt Lake, Davis, Weber, Cache, Box Elder and Utah counties, mandatory restrictions on solid-fuel burning devices, open burning and unnecessary driving were in place for Friday. Further, health professionals urged those with compromised heart and lung function, the elderly and very young to avoid outdoor activity.
The Utah Avalanche Center warned that the risk for potentially deadly snowslides remained "high" in the mountains above Logan and in the Uintas, while danger was rated as "considerable" for high-elevation backcountry slopes in the Ogden, Salt Lake and Provo districts. The mountains of southeastern Utah's Moab district were graded at "moderate" risk for avalanches.
The Wasatch Front looked for high temperatures on Friday around 40 degrees with overnight lows in the upper-teens, the same forecast as that for Thursday.
Southern Utah expected highs in the upper-50s and lows in the low-30s.
For more extensive forecast information, visit the Tribune's weather page at http://www.sltrib.com/weather.
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