[ADEQ Forecasts] ADEQ Daily Air Quality Forecast - Thursday, November 11, 2010

[forecasts@lists.azdeq.gov]

Health message for Wednesday November 10: No health impacts are expected.

Health message for Thursday November 11: No health impacts are expected. 


Synopsis and Discussion
In the wake of Tuesday's dry cold frontal passage, overnight lows in the Valley were in the 40's this a.m. and a moderate (3-4 deg C) surface-based radiation inversion formed that reached to over 1800'.  This and a light wind regime contributed to another round of elevated hourly particle pollution concentrations that included 151.8ug/m3 of PM-10 (coarse) at the West Forty Third monitoring site, 117.7ug/m3 at Buckeye, 105.4ug/m3 at Durango, and 83.0ug/m3 at South Phoenix.  Durango also had 20.2ug/m3 of PM-2.5 (fine).   Even so, the current synoptic weather pattern that features a large and deep trough in the mid-latitude storm track over the western U.S., still favors mostly good air quality in the short term - especially with additional embedded disturbances moving over the state on Thursday and again on Saturday.  The good news is that although overnight inversion formation and particle pollution levels may increase on Friday as warmer air aloft moves overhead between systems, there will continue to be a low risk for unhealthy concentrations of particle pollution over a 24-hour period. The bad news is that no rainfall is expected in the metro area for at least the next 10 days.  -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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