[ADEQ Forecasts] ADEQ Daily Air Quality Forecast For Tuesday, November 05, 2007

Mon Nov 5 14:16:14 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 TUESDAY, NOVEMBER 06, 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

SUN 11/04/2007

NONE    

Highest AQI Reading/Site

(Preliminary data only)

TODAY

MON 11/05/2007

NONE

TOMORROW

TUE 11/06/2007

NONE

EXTENDED

WED 11/07/2007

PM-10 HEALTH

WATCH

POSSIBLE

O3*

42

APACHE JUNCTION

34

GOOD

38

GOOD

40

GOOD

CO*

27

 PHOENIX SUPERSITE

38

GOOD

36

GOOD

41

GOOD

PM-10*

65

SOUTH PHOENIX

79

MODERATE

82

MODERATE

90

MODERATE

PM-2.5*

68

PHOENIX SUPERSITE

61

MODERATE

64

MODERATE

67

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 Monday, Nov 05:  Unusually sensitive people should
consider reducing prolonged or heavy exertion.

Health message for Tuesday, Nov 06: Unusually sensitive people should
consider reducing prolonged or heavy exertion.

Synopsis and Discussion

The polar front jet stream and main branch of the mid-latitude storm
track remain well north of Arizona; however, a weak upper level low off
the California coast and the sub-tropical jet stream will continue to
bring periods of mid and high-level clouds over the local forecast area
thru at least Wednesday.  The air mass over the Valley is stagnant and
is predicted to remain so until late in the week.  Local ACARS soundings
show that a moderate (7-8 deg C) surface-based inversion radiation
inversion formed overnight and that it extends all the way to 2700'; it
will not break until surface temperatures exceed 90 deg F. Once it does,
the best mixing depth will be near 8K' and dispersion will be FAIR to
GOOD.  Even though particle pollutant levels have been elevated for
nearly a week, the unusually warm afternoons have likely prevented
multiple exceedances of the PM-10 (coarse particle) health standard by
keeping mixing depths abnormally high for this time of year.
Unfortunately, the current weather regime and ongoing fugitive dust
emissions will pose a risk of high PM-10 levels until the arrival of an
upper level system late in the week; at least one Health Watch issuance
may be needed during this period.  Until then, persons with heart or
lung disease should reduce physical activity, especially during the
mornings and evening hours. -Reith    

For more information, or if you have problems viewing the image, please
visit our Web page:

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

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

The Arizona Department of Environmental Quality

Office of Communications

1110 W Washington St, Phoenix, AZ 85007

(602) 771-4583 

communications@azdeq.gov

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