[ADEQ Forecasts] ADEQ Daily Air Quality Forecast for Fri., Mar. 30

Thu Mar 29 13:36:13 MST 2007

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

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 FRIDAY, MARCH 30, 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

WED 03/28/2007

NONE 

Highest AQI Reading/Site

(Preliminary data only)

TODAY

THU 03/29/2007

NONE

TOMORROW

FRI 03/30/2007

NONE

EXTENDED

SAT 03/31/2007

NONE

O3*

38

APACHE JUNCTION & SOUTH PHOENIX

46

GOOD

49

GOOD

54

MODERATE

CO*

6

SOUTH SCOTTSDALE & MESA

19

GOOD

15

GOOD

14

GOOD

PM-10*

60

WEST 43RD

54

MODERATE

56

MODERATE

50

GOOD

PM-2.5*

23

PHOENIX VEHICLE EMISSIONS LAB

42

GOOD

35

GOOD

30

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 Thursday, Mar 29: Unusually sensitive people should
consider limiting prolonged exertion outdoors.

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

Synopsis and Discussion

Particulate levels have dropped back to where they are expected to be
for this time of the year - the low "Moderate" range.  Winds are
considerably lighter Thursday than they were on Tuesday where we saw
some of the high Particulate concentrations in months here in the
Phoenix forecast area.  Ozone levels also took a step back in the wake
of the passing cold front as much of the precursors were mixed out.
More stable conditions, plenty of sunshine, and increasing warmth the
next few days could allow Ozone to increase to the low "Moderate" range
this weekend.  Under high pressure, Valley maximum temperatures will
climb into the upper 80s to low 90s by early next week and stay there
through at least next Thursday.  Check back tomorrow for a better look
at your weekend weather and air quality.  Have a good day!  -J.Paul

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