[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Tuesday, May 18, 2010

[forecasts@lists.azdeq.gov]

For more information, please visit our Web page:
http://www.azdeq.gov/ensemble.pdf

For transportation alternatives:
http://www.valleymetro.org


Health message for Monday, May 17: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.

Health message for Tuesday, May 18: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. 


Synopsis and Discussion
Elevated to high ozone levels were present over the entire metro area again on Sunday with the health standard narrowly missed at the monitor in Dysart.  Thankfully, a significant change in local weather conditions should prevent a recurrence - at least temporarily.  A vigorous but dry upper level trough and surface cold front will approach AZ from the northwest today, weaken as it passes overhead on Tuesday, and exit the area on Wednesday.  A modest increase in winds, marked cooling, and considerable high cloudiness can be expected from this system. Winds, cloud cover, and cooling should all help to curtail ozone production and accumulation; however, low-level winds are now configured to be conducive for the transport of additional ozone and/or its precursors from CA as early as Tuesday afternoon and continuing on Wednesday.  Thus a rapid return to high ozone levels is possible by Wednesday.  Some areas of blowing dust are also possible during the afternoon hours today and Tuesday but the PM-10 (coarse particle) standard is not in jeopardy. -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
ms15@azdeq.gov

 
 

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