Mon Jul 12 11:36:42 MST 2010


For transportation alternatives:

Health message for Monday, July 12: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors.   
Health message for Tuesday, July 13: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors.   

Synopsis and Discussion
Despite the upper level "monsoon high" being positioned over southern AZ
the next few days, the general circulation around this feature - along
with residual monsoonal moisture - will be conducive to the continuation
of thunderstorm activity over the higher terrain north and northeast of
the metro area.  Outflow boundaries may still propagate toward the
deserts with a slight chance for blowing dust thru Wednesday, becoming
more likely thereafter.  The combination of cloud cover and gusty
westerly afternoon winds on Sunday kept local ozone levels well below
their potential.  Similar winds are expected the new few days under
mostly sunny skies; therefore, a modest increase in ozone levels is
expected with highest concentrations mainly over the east Valley.

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