[ADEQ Forecasts] ADEQ Daily Air Quality Forecast For Thursday, June 11, 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 Wednesday, June 10: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors. 

Health message for Thursday, June 11: No health impacts expected.
 
Synopsis and Discussion
Local June ozone levels have now unofficially entered into uncharted
territory.  Preliminary data indicates that Tuesday's peak level of only
43 parts per billion (36-AQI) is the lowest reported during the month of
June for the period of record 1996-2009.  The previous low concentration
was 45ppb on June 10 2003.  The current synoptic weather pattern of a
long-wave upper level trough over the eastern Pacific and western U.S.
appears to be locked in place - at least one model suggesting for
another 10 days or so.  Periodic short-wave systems - like the one on
Tuesday - are forecast to translate thru the longer period feature with
enhanced winds, cool air injection, and cloud cover the main impacts.
Thus it appears that a near-persistence type forecast should work well
for at least the next few days.

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
communications@azdeq.gov



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