[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Wednesday, November 09, 2011

Tue Nov 8 12:32:08 MST 2011

Health message for Tuesday November 08: No health impacts are expected.

Health message for Wednesday November 09: No health impacts are

Synopsis and Discussion
PARTICLES: In the wake of an upper level trough passage on Monday a
strong ridge aloft in the mid-latitude storm track will build over
Arizona from the west on Wednesday and Thursday.  Stagnation of the air
mass in the Phoenix metro area due to significant warming aloft will be
offset to a large degree by breezy gradient winds on Wednesday and gusty
easterly gradient winds on Thursday.  This, along with recent rainfall,
will mean that highest PM-10 (coarse particle) levels will remain in the
good range of the Air Quality Index. Due to gusty winds and favorable
mixing, it is looking less and less likely that PM-2.5 (fine particle)
levels will rise significantly the next few days even if wood-burning
fireplace activity increases.  More good news: another Pacific storm
system is poised to bring additional rainfall to the metro area thru the
OZONE:  Although Valley ozone precursor (NOx & VOC) emissions tend to
remain fairly constant all year, by October those factors conducive to
efficient ozone production - such as sun angle, day length, and
excessive heat - have all become less.  Thus, local ozone levels are
typically not much of an air quality problem again until late March.  

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Arizona Department of Environmental Quality
Office of Communications
1110 W. Washington St., Phoenix, AZ 85007
(602) 771-2215

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