[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Friday, April 02, 2010

Thu Apr 1 10:32:59 MST 2010

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Health message for Thursday, April 01: No health impacts are expected.

Health message for Friday, April 02: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. 

Synopsis and Discussion
Wednesday's late afternoon and early evening high wind event managed to produce some blowing dust in the Valley with seven miles visibility reported at Scottsdale Airport at 7:00 p.m. The highest hourly PM-10 (coarse particle) concentration was 309.4ug/m3 at the West Forty Third monitoring site at 6:00 p.m.  24-hour average concentrations were well below the standard, however.  A dry surface cold front moved thru the area this a.m. and the upper level trough will arrive this afternoon bringing a chance for showers and thunderstorms.  In their wake a ridge aloft will build briefly overhead on Friday before the main storm track in an un-amplified configuration resumes its position over AZ.   For the Phoenix metro area this means somewhat stagnant mornings followed by breezy afternoon winds each day thru the weekend, but no blowing dust and relatively low PM levels.  Increased sunshine, higher afternoon temperatures, and perhaps some weak ozone precursor transport from CA will all contribute to rising local ozone levels by Friday and into the weekend. -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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