[ADEQ Forecasts] ADEQ Issues Air Pollution Health Watch for Fri., March 14

[forecasts@lists.azdeq.gov]

Health message for Thursday, Mar 13: Unusually sensitive people should
consider reducing prolonged or heavy exertion.

Health message for Friday, Mar 14: Unusually sensitive people should
consider reducing prolonged or heavy exertion. 

Synopsis and Discussion
A PM-10 HEALTH WATCH HAS BEEN ISSUED FOR FRIDAY MARCH 14
Major changes in local weather conditions are on tap the next few days
as the mid-latitude storm track migrates south over the area.  Westerly
winds aloft over the Valley are advertised to reach 50+ mph at the 10K'
level and near 100 mph at the 18K' level on Friday; since the predicted
mixing depth is near 9K', some of this momentum will have an avenue for
reaching the surface. Areas of blowing and suspended dust are therefore
likely as is the potential for transported dust from desert areas upwind
of the metro area.  Since PM-10 (coarse particle) levels may approach
unhealthy levels, a PM-10 Health Watch has been issued for Friday.
After a very breezy day on Saturday, an upper level trough and surface
cold frontal passage are forecast to occur on Sunday and will be
accompanied by showers and a few thunderstorms - along with gusty winds
and much colder temperatures.   -Reith

http://www.azdeq.gov/environ/air/ozone/ensemble.pdf

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