[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Tuesday, November 08, 2011

Mon Nov 7 12:12:45 MST 2011

Health message for Monday November 07: No health impacts are expected.

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

Synopsis and Discussion
PARTICLES: A long-wave trough in the mid-latitude storm track that has
been over AZ since Saturday will move east on Tuesday with a strong
ridge aloft building overhead from the west on Wednesday and Thursday.
Stagnation of the air mass in the Phoenix metro area due to significant
warming aloft  (13-16 deg F in the 5-10K' layer by Wednesday afternoon)
and decreasing mixing depths will be offset to a degree by breezy to
gusty easterly winds Wednesday afternoon and especially on Thursday.
This, along with recent rainfall, will keep PM-10 (coarse particle)
levels in the good range of the Air Quality Index.  Although emissions
from wood-burning fireplaces and appliances tend to peak during the
weekends this time of year, PM-2.5 (fine particle) concentrations could
rise significantly higher than forecast the next few days if such
burning increases due to the cold weather.            
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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