[ADEQ Forecasts] AIR QUALITY FORECAST FOR TUESDAY, OCTOBER 06, 2009

[forecasts@lists.azdeq.gov]

For more information, please visit our Web page:
http://www.azdeq.gov/ensemble.pdf

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

Health message for Monday October 05: No health impacts are expected.

Health message for Tuesday October 06: No health impacts are expected. 

Synopsis and Discussion
Rather poor visibilities over the Valley this a.m. are quite apparent
per VISNET apparatus; see   http://www.phoenixvis.net/.  This is due to
residual suspended dust stirred up locally and transported in regionally
on Sunday by gusty winds associated with the arrival of a large upper
level trough in the mid-latitude storm track.  Despite appearances,
PM-10 (coarse particle) levels were not very high thru 8:00 a.m., with
seven monitoring sites indicating hourly readings only in the
40-113ug/m3 range. Also, local AMDAR sounding data indicates the absence
of a surface-based inversion but relatively light near-surface winds for
the time being.  Southwesterly winds increasing by early afternoon will
help disperse the particles.  The aforementioned large and strong upper
level trough - currently over the entire western half of the U.S. - will
separate into two sections by Tuesday morning.  The southern portion
will gather strength and move toward AZ again on Wednesday.   As a
result, very breezy conditions are expected on Tuesday and Wednesday
with a slight chance for showers on Wednesday and Thursday


If you have any questions or comments regarding this forecast please
contact:

Arizona Department of Environmental Quality Office of Communications
1110 W. Washington St., Phoenix, AZ 85007
(602) 771-2215
ms15@azdeq.gov


**********************************************************************
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.