[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Saturday, November 14, 2009

[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 Friday, November 13: Unusually sensitive people should consider limiting prolonged outdoor exertion. 

Health message for Saturday, November 14: Unusually sensitive people should consider limiting prolonged outdoor exertion. 


Synopsis and Discussion
The trough of low pressure providing the clouds across the region will continue to move towards the forecast area Friday.  The associated front will pass through late Saturday.  Ahead of the front, a few showers may get squeezed out over higher terrain of northern and eastern Arizona.  Nothing measurable is expected for the Phoenix forecast area.  Winds are not forecast to be very strong here in the Valley, either.  Breezes should be just enough to help disperse some of this accumulated pollution without generating additional blowing dust.  Much cooler, drier air will fill in behind the front, dropping afternoon desert temperatures into the upper 60s on Sunday.  In fact, this system will pave the way for additional waves to move through over the next couple of weeks.  The frequency of these disturbances will keep our temperatures near normal while priming the region for increased precipitation chances.  We're still expecting a moderate El Nino which means above normal precipitation November through March.  In addition, cooler weather means increased local fireplace activity and ultimately higher PM-2.5 concentrations.  Hopefully the increase in weather disturbances will help keep these concentrations in check.  

Check back Sunday for the latest on next week's weather and air quality.  Until then, have a great weekend!  -J.Paul  


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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