[ADEQ Forecasts] ADEQ Issues Air Pollution Health Watch for Wed., Feb. 28

Tue Feb 27 11:56:54 MST 2007

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

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

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

*LINK TO EXCEEDANCE & HEALTH STATEMENT INFO FOR THE 2005-06 & 2006-07 FORECAST SEASONS* <http://www.azdeq.gov/environ/air/ozone/pmstats.pdf> 

AIR QUALITY FORECAST FOR WEDNESDAY, FEBRUARY 28, 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 02/26/2007

NONE 

Highest AQI Reading/Site

(Preliminary data only)

TODAY

TUE 02/27/2007

NONE

TOMORROW

WED 02/28/2007

PM-10 HEALTH WATCH

EXTENDED

THU 03/01/2007

NONE

O3*

38

APACHE JUNCTION

35

GOOD

41

GOOD

33

GOOD

CO*

23

WEST INDIAN SCHOOL

18

GOOD

21

GOOD

19

GOOD

PM-10*

54

WEST 43RD

77

MODERATE

90

MODERATE

83

MODERATE

PM-2.5*

43

DURANGO

42

GOOD

46

GOOD

44

GOOD

* 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, Feb 27: Unusually sensitive people should consider limiting prolonged exertion outdoors.

Health message for Wednesday, Feb 28: Unusually sensitive people should consider limiting prolonged exertion outdoors.

Synopsis and Discussion

*PM-10 Health Watch has been issued for Wednesday, February 28, 2007*

Two disturbances will dive south and then push east through Arizona this week.  The first one is expected to affect Arizona Wednesday, dropping afternoon desert temperatures about 10 degrees, to the low 60s.  It will also increase afternoon winds to around 20-30 mph at times.  There is only a 10% chance of a passing shower in the Valley Wednesday, but clouds are probable.  The second disturbance will clip the Four Corners region Thursday afternoon, keeping the forecast area cool for one more day.  High pressure will then return over the week, allowing temps to race towards 80°F by the weekend.  Winds with no rain Wednesday and Thursday are a recipe for possible blowing dust.  Thus, Particulate levels will climb well into the "Moderate" range during this period.  Air quality improves Friday through Sunday with lighter winds and decreased work-week activities.  Check back tomorrow for the latest.  Have a good day!  -J.Paul 

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