[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Tuesday, September 21, 2010

forecasts@lists.azdeq.gov
Mon Sep 20 14:03:38 MST 2010


Health message for Monday, September 20: No health impacts are expected.
  
Health message for Tuesday, September 21: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. 


Synopsis and Discussion
A rather abrupt increase in moisture from the south occurred overnight ahead of a weak upper level trough currently over western AZ.  Although no showers or thunderstorms are expected today in the Valley proper, such activity over the higher terrain to the east and southeast will have the potential to produce outflow boundaries capable of generating blowing dust (PM-10) over those portions of the metro area; as a result, DUST has been added to the forecast.  Even more moisture (remnants of Hurricane Karl) is now forecast to be drawn northward over mainly the eastern half of AZ on Tuesday and Wednesday.  In addition, a rather strong upper level trough from the Pacific is advertised to approach on Wednesday.  Thus, an increased chance for active weather in the Valley is expected that day and the combination of gusty gradient winds and strong thunderstorm outflow winds may cause dense blowing dust in some areas. Meanwhile, local ozone levels will stay in or near the good range of the Air Quality Index thru the period.   -Reith 


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

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


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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