[ADEQ Forecasts] ADEQ Issues Air Pollution Health Watch for Tues., April 15

[forecasts@lists.azdeq.gov]

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

Health message for Monday, Apr 14: Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors. 
 
Health message for Tuesday, Apr 15:  Unusually sensitive people should
consider reducing prolonged or heavy exertion outdoors. 
 
Synopsis and Discussion
A PM-10 HEALTH WATCH HAS BEEN ISSUED FOR TUESDAY APRIL 15
The mid-latitude storm track will remain active at relatively low
latitudes for this time of year and produce roller coaster type weather
and air pollutant concentrations over the Phoenix area for the
foreseeable future. The first in another series of strong troughs and
dry cold fronts from the northwest will again cause a big increase in
pressure gradient/height contour winds over the local forecast area by
early Tuesday that may persist thru most of Wednesday.  Afternoon
temperatures in the lower 90's along with sunny skies will allow the
predicted mixing depth of nearly 10K' to be realized; momentum from
winds in the 30-40 mph range at that altitude will be able to mix to the
surface after the noon hour.  Areas of disturbed/destabilized soil will
contribute to areas of blowing dust - especially over the west Valley.
For this reason a PM-10 (coarse particle) Health Watch has been issued
for Tuesday as a precaution for those with heart or lung disease (who
may want to remain indoors).  -Reith

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