[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Saturday, April 24, 2010

Fri Apr 23 10:28:12 MST 2010

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Health message for Friday, April 23: No health impacts are expected. 

Health message for Saturday, April 24: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.  

Synopsis and Discussion
In the wake of the vigorous upper level trough that has occupied AZ for the past two days, a warm ridge aloft will build and remain over the Phoenix metro area thru the weekend.  Low-level gradients are forecast to be rather weak and no significant winds are expected. Mostly clear skies, strong warming aloft, and the arrival of drier air will set the stage for overnight inversion formation and increasing stagnation of the air mass.  However, due to light rainfall on Thursday and lower weekend emissions, elevated PM-10 levels are not expected until Monday. Strong late-April sunshine and rising afternoon temperatures will mean an increase in local ozone production today and thru the weekend.  This process may be enhanced by low-level winds that will be conducive to the transport of ozone and/or its precursors from CA beginning late this morning and continuing at times both Saturday and Sunday.  -Reith

If you have any questions or comments regarding this forecast please contact:

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


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