[ADEQ Forecasts] ADEQ Daily Air Quality Forecast for Saturday, August 08, 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, August 7: Unusually sensitive people should consider limiting prolonged or heavy exertion outdoors.

Health message for Saturday, August 8: Unusually sensitive people should consider limiting prolonged or heavy exertion outdoors.


Synopsis and Discussion

*FRIDAY'S OZONE HEALTH WATCH AND PM-10 HEALTH WATCH HAVE BEEN CANCELED*

The trough of low pressure over the western U.S. that brought the breezy to windy conditions on Thursday will weaken and slowly become absorbed by the main jet stream in Canada.  This will allow high pressure to return to the region once again from its place of banishment to the southeast.  By Tuesday of next week, we should see afternoon desert temperatures increase slightly, but increased moisture will offset any potential for record heat next week.  The upper-level high pressure system will set up shop near the Four Corners, producing a small window for some late season showers and thunderstorms in the Phoenix forecast area by Thursday and Friday of next week.  

The shift in winds will also bring a return of elevated ozone concentrations while the atmosphere becomes a bit more stable as well.  In the mean time, ozone levels should reach the lower "Moderate" range at several sites this weekend under mostly sunny skies and relatively lighter winds.  

Yesterday afternoon's strong winds were expected to deliver some widespread blowing dust as well as some ozone precursors.  However, preliminary data indicates that the winds actually cleaned the air out somewhat. With lower than expected PM-10 and Ozone concentrations Friday morning, both Health Watches in effect for Friday have been canceled. 
Check back on Sunday for look at the latest air quality conditions as well as look at the coming week's forecast.  Until then, have a great weekend!

If you have any questions or comments regarding this forecast please contact:

The Arizona Department of Environmental Quality
Office of Communications
1110 W Washington St, Phoenix, AZ 85007
(602) 771-2215
ms15@azdeq.gov


 
 

**********************************************************************
NOTICE: This e-mail (and any attachments) may contain PRIVILEGED OR CONFIDENTIAL information and is intended only for the use of the specific individual(s) to whom it is addressed. It may contain information that is privileged and confidential under state and federal law. This information may be used or disclosed only in accordance with law, and you may be subject to penalties under law for improper use or further disclosure of the information in this e-mail and its attachments. If you have received this e-mail in error, please immediately notify the person named above by reply e-mail, and then delete the original e-mail. Thank you.