[ADEQ Forecasts] ADEQ Daily Air Quality Forecast for Fri., June 1

forecasts@lists.azdeq.gov
Thu May 31 11:55:24 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, JUNE 01, 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 05/30/2007

 

 

NONE   

 

 

 

 

 

 

Highest AQI Reading/Site

(Preliminary data only)

TODAY

THU 05/31/2007

 

 

NONE  

 

 

 

 

 

 

 

TOMORROW

FRI 06/01/2007

 

 

NONE 

 

 

 

 

 

 

EXTENDED

SAT 06/02/2007

 

 

NONE  

 

 

 

 

 

 

 

 


O3*


48


CAVE CREEK 


& 


RIO VERDE

59

MODERATE


64


MODERATE


54


MODERATE

 


CO*


18


PHOENIX SUPERSITE

12

GOOD


14


GOOD

13

GOOD

 


PM-10*


67


 WEST FORTY THIRD


73


MODERATE


75


MODERATE


46


GOOD

 


PM-2.5*


41


DURANGO

35

GOOD


38


GOOD


34


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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* 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, May 31:   Unusually sensitive people should
consider limiting prolonged or heavy exertion outdoors.   

 

Health message for Friday, June 01:   Unusually sensitive people should
consider limiting prolonged or heavy exertion outdoors. 

 

Synopsis and Discussion

For only the fourth time since 1996, it appears that the month of May
will come and go with no unhealthy local ozone levels.  During the same
interval (1996-2006) the average daily ozone concentration for May was
72.7 ppb; thru the 30th of this month the average has only been 67.9
ppb.  It is likely that a combination of persistent westerly flow and
very dry air masses, along with daytime temperatures below their May
potential, have contributed to this situation.  It remains to be seen if
this trend will hold; since 1996 over 73% of the total number of 8-hour
average ozone exceedance days - 124 of 169 - has occurred during the
June-July-August period.  With afternoon temperatures forecast to
approach 110 degrees F early next week, local ozone concentrations may
exhibit a modest rise then depending on afternoon wind speeds. In the
meantime, highest concentrations of coarse particles (PM-10) and ozone
(O3) are predicted to be no higher than the mid-moderate range of the
Air Quality Index. -Reith 

 

 

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