[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Tuesday, March 15, 2011

Mon Mar 14 12:36:54 MST 2011

Health message for Monday March 14: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors. 

Health message for Tuesday March 15: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors.  

Synopsis and Discussion
A flat ridge aloft will remain over the Valley thru Tuesday.  Just like
today, overnight inversion formation, warm air aloft, and relatively
light winds on Tuesday will contribute to some elevated  hourly PM-10
(coarse) and PM-2.5 (fine) particle concentrations during the morning
hours; however, 24-hour average PM-10 levels will remain in the
low-moderate range of the Air Quality Index.  Mostly sunny conditions
during the afternoon with temperatures near 90 degrees F will be
conducive to local ozone concentrations near the same level.  A weather
pattern change of some length will begin on Wednesday when a large upper
level trough develops off the CA coast.  Its early impacts will include
a tightening of low-level gradients that will translate into an increase
in winds over the Phoenix metro area both Wednesday and Thursday
afternoons.  Because no rain has occurred locally since late February,
and since afternoon high temperatures since March 1st have been in the
70's and 80's, areas of dry and disturbed soil will increase the chance
for isolated wind-blown dust both days. -Reith

For more information, please visit our Web page:

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If you have any questions or comments regarding this forecast please

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

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