Fri Feb 6 11:14:57 MST 2009


For transportation alternatives:

Health message for Friday, February 6, 2009: Unusually Sensitive People
should consider limiting prolonged exertion outdoors. 

Health message for Saturday, February 7, 2009: Unusually Sensitive
People should consider limiting prolonged exertion outdoors. 

Synopsis and Discussion
   It's time to get those umbrellas and winter-weather clothes out
again!  An area of low pressure off the coast of southern California is
starting to move onshore Friday.  Some showers are already occurring
along the coastal areas near San Diego and Los Angeles.  This system
will continue east through the weekend.  Rain will begin falling western
Arizona Saturday morning, spreading across south-central Arizona -
including the Phoenix forecast area - late Saturday night into early
Sunday.  There will be a slight break Sunday afternoon through early
Monday, but a second system will bring the possibility of another round
of showers Monday afternoon into early Tuesday.  After all is said and
done, some spots in the Valley could see close to an inch of rain if not
more.  Higher elevations are expected to see over an inch.  Snow levels
with these systems will generally be above 5,000 feet, possibly dropping
lower by Monday with cooler air filling in behind them.  Afternoon
desert temperatures will be in upper 60s on Saturday, dropping to the
lower 60s Sunday and Monday.  Upper 50s are likely Tuesday and
Wednesday, rebounding into the 60s again by the end of the week.
   Particulate concentrations will drop comfortably into the "Good"
range by Sunday once the rain begins to fall.  They will likely remain
there well into next week.  This means that people should have a much
easier time breathing the next several days.
   Check back on Sunday for the latest on this weather event and the
associated air quality.  Have a great weekend!  -J.Paul

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