[ADEQ Forecasts] ADEQ Issues an Ozone Health Watch for the Phoenix Metro Area for Tuesday, September 01, 2009

[forecasts@lists.azdeq.gov]

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

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http://www.valleymetro.org


Health message for Monday, August 31: No health impacts are expected.
 
Health message for Tuesday, September 01: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. 


Synopsis and Discussion

*AN OZONE HEALTH WATCH HAS BEEN ISSUED FOR TUESDAY SEPTEMBER 01*

On Sunday evening an outflow boundary from thunderstorm cells over Pinal County brought wind gusts near 35 mph to the southeast metro area by 8:00 p.m.  Despite recent rainfall, sufficient dust (PM-10) was raised to produce hourly concentrations of that pollutant of 254.4ug/m3 at Higley at 8:00 p.m. and 314.2ug/m3 at the West Forty Third monitoring site at 9:00 p.m. With monsoon moisture on the increase and steering winds from the east to southeast the next few days, additional wind/dust events are probable.  The same wind regime will tend to enhance local ozone accumulation.  Although ozone exceedances in September are rare, this situation bears watching since under these wind flow conditions the most highly populated portions of the metro area may be impacted with elevated ozone levels.  As a result, an Ozone Health Watch has been issued for Tuesday with an extension possible for Wednesday.

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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