[ADEQ Forecasts] ADEQ AIR QUALITY FORECAST FOR SATURDAY, OCTOBER 25, 2008

forecasts@lists.azdeq.gov
Fri Oct 24 11:13:35 MST 2008


http://www.azdeq.gov/ensemble.pdf

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

Health message for Thursday, October 23: Unusually sensitive people
should consider reducing prolonged or heavy exertion.  

Health message for Friday, October 24: Unusually sensitive people should
consider reducing prolonged or heavy exertion. 

Synopsis and Discussion
The trough of low pressure currently located over the central plains
with begin to slowly push eastward over the next few days.  This will
allow a large Pacific ridge to migrate to the east, and eventually
situate itself over Arizona by the end of the weekend into early next
week.  Daytime high temperatures will reach the low 90s by Sunday with
overnight lows remaining in the upper 50s to low 60s.  Light winds and
stable atmospheric conditions will result in a fairly stagnant air mass
over the Valley into the first half of next week.  Despite the stagnant
conditions, a decline in workweek activity for the weekend should result
in a slight moderation in PM10 concentrations for Saturday and Sunday.
Elevated levels of PM10 will likely return for the first half of next
week. - Paris

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