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Wildfire Smoke Update
Saturday, September 14, 2013 10:35 AM

Satellite Photos | Locations and Smoke Conditions

Today's Report and Forecast Today's Summary
Air quality is still GOOD around the state today. Recent active and cooler weather has reduced wildfire activity and has directed distant wildfire smoke away from Montana. However, by Sunday afternoon and Monday, high atmospheric winds will blow from the southwest. This, combined with warm temperatures, could mean that smoke will cause minor impacts to southwestern Montana and the southern Bitterroot Valley. These impacts will be mostly in the form of long-range visibility impairment, but air quality may also become MODERATE in the southern Bitterroot as well. A cold front is expected to pass Monday night and the weather will stay very active through the middle of the week, during which time, air quality and visibility will become GOOD again.
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.