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Wildfire Smoke Update
Friday, September 6, 2013 8:45 AM

Satellite Photos | Locations and Smoke Conditions

Today's Report and Forecast Today's Summary
Air quality is GOOD around the state this morning. Cumulative particulate concentrations are at MODERATE levels in Bozeman, probably because of a couple wildfires just to the south of the Gallatin Valley, all hourly concentrations have been GOOD. The large low pressure system that was responsible for yesterday’s thunderstorms is still sitting over the Pacific Northwest. Today, we will have more afternoon thunderstorms with gusty winds. A cold front will pass late this afternoon through tomorrow morning. Winds will be strong along the cold front and thunderstorm activity will be more likely along the frontal boundary. Temperatures will be very warm again today, especially across eastern Montana, ahead of the anticipated cold front. Air quality will remain generally GOOD throughout the day with some MODERATE impacts possible in the Bitterroot Valley and parts of the southwestern region of the state. There will be another update later this afternoon with a full forecast.
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

Morning satellite photo centered on Great Falls 



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  

 Bozeman B24, B8 


Seeley Lake
West Yellowstone
Great Falls

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.