[ADEQ Forecasts] ADEQ Daily Air Quality Forecast for Tues., May 22

Mon May 21 13:11:40 MST 2007

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AIR QUALITY FORECAST FOR TUESDAY, MAY 22, 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 05/20/2007

NONE   

Highest AQI Reading/Site

(Preliminary data only)

TODAY

MON 05/21/2007

NONE  

TOMORROW

TUE 05/22/2007

NONE 

EXTENDED

WED 05/23/2007

NONE  

O3*

56

CAVE CREEK 

AND 

NORTH PHOENIX

59

MODERATE

64

MODERATE

82

MODERATE

CO*

07

PHOENIX SUPERSITE

13

GOOD

09

GOOD

10

GOOD

PM-10*

45

 WEST FORTY THIRD

67

MODERATE

65

MODERATE

71

MODERATE

PM-2.5*

31

DURANGO 

AND 

PHOENIX SUPERSITE

34

GOOD

36

GOOD

40

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 Monday, May 21:   Unusually sensitive people should
consider limiting prolonged or heavy exertion outdoors.   

Health message for Tuesday, May 22:   Unusually sensitive people should
consider limiting prolonged or heavy exertion outdoors. 

Synopsis and Discussion

An upper level trough in the mid-latitude storm track will become
established over the western U.S. by Tuesday and remain in place much of
this week.  A series of disturbances will then translate thru the mean
trough position and bring somewhat cooler temperatures as well as
periods of breezy south to westerly winds.  Under these conditions
highest levels coarse particles (PM-10) are estimated to be no higher
than the mid-moderate range of the Air Quality Index.  However, winds
aloft will be capable of transporting additional ozone and its
precursors over the metro area from California.  One such episode may
contribute to a spike in local ozone concentrations on Wednesday.
-Reith 

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