764
AEUS71 KPBZ 081917
AQAPBZ
AIR QUALITY ALERT
RELAYED BY NATIONAL WEATHER SERVICE PITTSBURGH PA
217 PM EST SUN NOV 8 2009
PAZ021-100130-
ALLEGHENY-
INCLUDING THE CITY OF...PITTSBURGH METRO AREA
217 PM EST SUN NOV 8 2009
...AIR QUALITY ALERT IS IN EFFECT FROM 12 AM MONDAY UNTIL 11 PM
MONDAY...
THE PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL PROTECTION HAS ISSUED
AN AIR QUALITY ACTION DAY FOR THE FOLLOWING COUNTIES...
ALLEGHENY.
THE AIR QUALITY ACTION DAY HAS BEEN ISSUED FOR THE LIBERTY-CLAIRTON
AREA.
THANKS TO THE HIGH PRESSURE SYSTEM WHICH HAS BEEN IN CONTROL OF OUR
WEATHER FOR THE PAST COUPLE OF DAYS...WE HAVE SEEN AN UNSEASONABLY
WARM AIR MASS MOVE IN OVER THE REGION. WITH WARM AIR MOVING IN ALOFT
AND WITH CLEAR SKIES OVERNIGHT AN INVERSION SHOULD FORM OVER THE
REGION DURING THE MORNING HOURS. THIS INVERSION ALONG WITH LIGHT
SOUTHERLY FLOW AT THE SURFACE WILL ALLOW FINE PARTICULATE LEVELS TO
RISE DURING THE MORNING HOURS. MORE MIXING IN THE AFTERNOON WILL
FORCE FINE PARTICULATE LEVELS TO FALL SOMEWHAT BUT NOT BEFORE
AVERAGING THE DAY IN THE CODE ORANGE RANGE.
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