[ADEQ Forecasts] ADEQ Daily Air Quality Forecast for Wed., Oct. 31

Tue Oct 30 13:42:31 MST 2007

VERY UNHEALTHY  (201-300)

UNHEALTHY (151-200)

UNHEALTHY FOR SENSITIVE GROUPS (101-150)

MODERATE (51-100)

GOOD (0-50)

For more information visit:

http://www.epa.gov/airnow/aqibroch

AIR QUALITY FORECAST FOR WEDNESDAY, OCTOBER 31, 2007

This report is updated by 1:00 p.m. Sunday thru Friday and is valid

for areas within and bordering Maricopa County in Arizona

FORECAST

DATE

NOTICES

(*SEE BELOW FOR DETAILS) 

AIR POLLUTANT

YESTERDAY

MON 10/29/2007

NONE    

Highest AQI Reading/Site

(Preliminary data only)

TODAY

TUE 10/30/2007

NONE 

TOMORROW

WED 10/31/2007

NONE 

EXTENDED

THU 11/01/2007

NONE 

O3*

35

APACHE JUNCTION & PINNACLE PEAK

34

GOOD

35

GOOD

37

GOOD

CO*

16

SOUTH PHOENIX, WEST PHOENIX & PHOENIX SUPERSITE

27

GOOD

25

GOOD

30

GOOD

PM-10*

68

WEST 43RD

72

MODERATE

82

MODERATE

88

MODERATE

PM-2.5*

49

DURANGO

43

GOOD

51

MODERATE

58

MODERATE

* O3 = Ozone      CO = Carbon Monoxide      PM-10 = Particles 10 microns
& smaller      PM-2.5 = Particles smaller than 2.5 microns

*"Ozone Health Watch" means that the highest concentration of OZONE may
approach the federal health standard.

"PM-10 or PM-2.5 Health Watch" means that the highest concentration of
PM-10 or PM-2.5 may approach the federal health standard.

"High Pollution Advisory" means that the highest concentration of OZONE,
PM-10, or PM-2.5 may exceed the federal health standard.

"DUST" means that short periods of high PM-10 concentrations caused by
outflow from thunderstorms are possible.

Health message for Tuesday, Oct 30: Unusually sensitive people should
consider limiting prolonged exertion outdoors.

Health message for Wednesday, Oct 31: Unusually sensitive people should
consider limiting prolonged exertion outdoors.

Synopsis and Discussion

A disturbance will drag along the Arizona/Utah border the next few days
before finally exiting to the east late Friday.  This isn't going to be
much of a wind-maker, so blowing dust will not be an issue.  In fact,
Thursday looks to be a pretty stagnant day here in the Valley.  Rain
will also be lacking with this system, so we won't see the air cleared
out that way, either.  It will mainly help to lower afternoon
temperatures to near normal.  Phoenix will see the mid 80s by Friday and
Saturday.  Speaking of lack of rain, it has now been 37 days without
measurable rain in the Phoenix forecast area.  We don't see any in the
next 7 to 10 days, so that would potentially put us at 47 days.  We
bring this up as the streak of 143 consecutive days without rain from
Oct. 2005 - Mar. 2006 (which produced 41 PM10 Health Watches, 25 PM10
HPAs, and 30 PM10 exceedance days) lingers in the back or our minds.  We
don't want to repeat that.  So, during such dry streaks, we encourage
everyone to do what they can to reduce the possibility of a
reoccurrence.  For now, PM10 looks to remain in the "Moderate" category,
increasing to the upper part of that range on Wednesday and Thursday
under near-stagnant conditions.  Check back tomorrow for the latest.
Have a good day!  -J.Paul

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