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Wildfire Smoke Update
Friday, September 13, 2013 3:30 PM

Satellite Photos | Locations and Smoke Conditions

Today's Report and Forecast Today's Summary
Air quality is GOOD around the state today, as it has been for the last couple of days. Air quality will continue to be GOOD on Saturday. By Sunday and Monday, high atmospheric winds will blow from the southwest, which may blow wildfire smoke into parts of southwestern Montana. Air quality is still expected to be GOOD across most of the state while smoke may impair very long-range visibility. MODERATE impacts are possible in the southernmost Bitterroot Valley, but all smoke will be cleared by Monday night/Tuesday morning as a cold front ushers in some very active weather. Air quality is GOOD today again. There is a chance for very minor wildfire smoke to impact parts of southwestern Montana late Sunday and Monday.
Residents near active fires and under plumes aloft need to remain aware of current conditions and use the visibility guidelines to guide their activity decisions as the situation changes.

Air Quality Bureau
Montana Department of Environmental Quality
Phone: (406) 444-3490
Email: DEQ-ARMB-Admin@mt.gov




The smoke report below compares particulate levels where information is available to MDEQ’s Health Effects Categories. Real time particulate information is currently available in most of the larger urban areas from several different sources including: DEQ run PM-10 BAMS and PM2.5 BAMS, NWS ASOS visibility monitors, and USFS remote access Nephelometers and BAMS. These advisories represent conditions between midnight and 8 AM and may change substantially throughout the day.

Locations and severity of forest fire smoke reports since midnight of the date above at reporting stations.
Health Effects Categories City
  Very Unhealthy  
  Unhealthy for Sensitive Groups  




B1(x) One-hour BAM value (number of values)
B8(x) Eight-hour average BAM
B24 24 hour  average BAM value
Vis(x) Visibility value (number of hours)
Vis(am/pm) Visibility value from twice/day reporting stations

Local impacts in areas immediately adjacent to active fires are expected to exceed some or all of the advisory levels.  DEQ recommends the use of local visibility guidelines to evaluate possible health risks and make informed activity decisions.