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Wildfire Smoke Update
for
Saturday, September 7, 2013 5:26 PM

Satellite Photos | Locations and Smoke Conditions


Today's Report and Forecast Today's Summary
Air quality is GOOD around the state today. A very active weather system just to our west has created good dispersion, rain, and cooler temperatures to reduce any ground-level wildfire smoke around the area. This weather system has also caused thunderstorms to develop again this afternoon. These storms will continue through the evening again. Tomorrow, the weather system will continue to move very slowly to the east and by late tomorrow afternoon, should be centered over central Montana. This will cause high atmospheric winds to change direction and blow from the northwest across far western Montana, from the west across central Montana, and from the southwest across far eastern Montana. Thunderstorms and rain showers will also develop again as this weather system passes. With the active weather and change in wind direction high in the atmosphere, air quality will remain GOOD again on Sunday around the state. By Monday, the weather system will be over eastern Montana and the western Dakotas and high pressure will move in from the west. High atmospheric winds will continue to blow from the northwest and air quality will remain GOOD again. The ridge of high pressure will last at least through Thursday of the coming week. This will cause more dry and stable conditions, so afternoon thunderstorms are not likely. Air quality is expected to stay generally GOOD through most of the week. Another weather system may arrive next weekend to bring another round of rain and thunderstorms. Air quality is GOOD around the state today.
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.

Kristen Martin
State Air Quality Meteorologist
Air Resource Management Bureau
Montana Department of Environmental Quality
Phone: (406) 444-0283
Email: kmartin@mt.gov




This is the visible satellite image from 5:00 this evening. 

This is the visible satellite image from 5:00 this evening.


 





This morning’s analysis from NOAA’s satellite services division shows the active fires in Montana and the smoke plumes combining and spreading downwind (the analyzed smoke is based on yesterday’s satellite coverage, the fire detects are based on last nights satellite coverage).

This morning’s analysis from NOAA’s satellite services division shows the active fires in Montana and the smoke plumes combining and spreading downwind (the analyzed smoke is based on yesterday’s satellite coverage, the fire detects are based on last nights satellite coverage).

Red indicates hot spot detected. Green represents thin smoke, yellow is moderate smoke, and purple is dense smoke. Fire size is exaggerated for visibility at this scale. To identify individual fires on graphic above go here: http://activefiremaps.fs.fed.us/lg_fire2.php 




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
  Hazardous  
  Very Unhealthy  
  Unhealthy  
  Unhealthy for Sensitive Groups  
  Moderate

  

  Good

 All reporting locations 

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.