[ADEQ Forecasts] ADEQ Issues High Pollution Advisory for Sun., March 22

[forecasts@lists.azdeq.gov]

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

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

Health message for Friday, March 20, 2009: Unusually Sensitive People
should consider limiting prolonged or heavy exertion outdoors.

Health message for Saturday, March 21, 2009: Unusually Sensitive People
should consider limiting prolonged or heavy exertion outdoors. 
	
Synopsis and Discussion
*A PM-10 HIGH POLLUTION ADVISORY HAS BEEN ISSUED FOR SUNDAY, MARCH 22,
2009 *
   High pressure will briefly yield to a very deep trough of low
pressure this weekend.  This trough will dig south and push east through
Arizona late Saturday through early Monday.  It's going to be the winds
and much cooler air that will be the main features of this system.  The
deserts can expect to see sustained winds on Sunday around 20 to 30 mph
with gusts possibly reaching as high as 40 mph at times. It's been a
while since our last significant rainfall and the surface soil is
becoming less stable with each passing day, as evident by Thursday's mid
"Moderate" PM-10 readings at West 43rd.  There is an outside chance of a
light shower on Monday morning, but unfortunately the bulk of the
moisture looks to stay well north of the Phoenix forecast area.  Loose,
dry soil in combination with expected high winds support the high
probability of blowing dust for several hours across the Valley on
Sunday.  This will likely lead to one or more monitors exceeding the
24-hr PM-10 health standard.  Thus, a PM-10 High Pollution Advisory for
Sunday is being issued.  Afternoon desert temperatures will drop to the
low to mid 70s on Monday and Tuesday, warming to the mid 80s by this
time next week as high pressure re-establishes itself.  Check back on
Sunday for a better look at the impact of this pending system and the
possibility of dust-relieving rain on Monday.  Until then, have a great
week!  -J.Paul

**********************************************************************
NOTICE: This e-mail (and any attachments) may contain PRIVILEGED OR 
CONFIDENTIAL information and is intended only for the use of the specific 
individual(s) to whom it is addressed.  It may contain information that is 
privileged and confidential under state and federal law.  This information 
may be used or disclosed only in accordance with law, and you may be 
subject to penalties under law for improper use or further disclosure of the 
information in this e-mail and its attachments. If you have received this e-
mail in error, please immediately notify the person named above by reply e-
mail, and then delete the original e-mail.  Thank you.