AIR QUALITY ALERT
Warning Issue Date: 821 PM MST MON DEC 28 2009
...A STAGNATION WARNING HAS BEEN ISSUED BY THE MONTANA DEPARTMENT
OF ENVIRONMENTAL QUALITY...
THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE
MONTANA DEPARTMENT OF ENVIRONMENTAL QUALITY.
MDEQ HAS ISSUED A STAGNATION WARNING FOR HELENA AND THE SOUTHERN
PORTION OF LEWIS AND CLARK COUNTY...AND WEST YELLOWSTONE AND THE
SOUTHERN PART OF GALLATIN COUNTY. A STAGNATION WARNING MEANS
DISPERSION CONDITIONS ARE POOR AND NOT EXPECTED TO IMPROVE MUCH
AND THAT PARTICULATE LEVELS HAVE BEEN TRENDING UP. EXCEEDANCE OF
THE NAAQS HAS ALREADY OCCURRED OR WILL OCCUR.
DUE TO AN INCREASE IN PARTICULATE LEVELS...THE AIR QUALITY HAS OR
WILL BECOME UNHEALTHY IN THE VICINITY OF HELENA IN SOUTHERN
LEWIS AND CLARK COUNTY AND WEST YELLOWSTONE IN SOUTHERN GALLATIN
COUNTY.
THOSE INDIVIDUALS WHO ARE SENSITIVE TO INCREASED PARTICULATE OR
SMOKE LEVELS ARE ENCOURAGED TO AVOID PROLONGED OR STRENUOUS
OUTDOOR ACTIVITY. ALL OTHERS SHOULD LIMIT PROLONGED OR STRENUOUS
OUTDOOR ACTIVITY. YOUR COOPERATION IS APPRECIATED.
ANOTHER STATEMENT WILL BE ISSUED BY 4 PM MST TUESDAY...DECEMBER 29
UNLESS CONDITIONS IMPROVE AND THE WARNING IS NO LONGER NEEDED.
PLEASE VISIT THE DEPARTMENTS WEBSITE AT.../USE LOWER CASE/...
HTTP://SVC.MT.GOV/DEQ/AQREPORT/MOSTRECENTUPDATE.ASPX FOR MORE
INFORMATION.
$$
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