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E-M:/ Detroit/Macomb County - Code Orange Today/Alert for Tomorrow

The East side of Detroit and Macomb County go
to high side of Code Orange (AQI - 143)  .. Unhealthy
for Sensitive Groups late this afternoon...on
Air Quality Index.



Ozone Action Day set for Wednesday in West and
Southeastern Michigan; conditions may persist to the


MDEQ content follows

FORECAST SUMMARY: Tuesday, July 31st, 2007 through Wednesday, August 1st, 2007

OZONE: 8-hour concentrations are expected to be Upper Good to Low Moderate Tuesday. Levels will be Moderate to Unhealthy for Sensitive Groups (USG) on Wednesday.

PM-2.5: 24-hour concentrations are expected to be in the Moderate range through Wednesday.


Temperatures soared into the 90s on Monday; however, air quality levels remained mostly Good across the state. This will not be the case in the next few days; however. Hot conditions will continue through mid-week as the high pressure that was talked about Monday slides overhead then further east by Thursday. As the high slides east the wind flow will change to the south/southwest starting Wednesday. Hot conditions, southwest winds and plenty of sunshine will help create an environment conducive for Ozone development. Therefore, an Ozone Action Day has been issued for Wednesday for parts of west and southeastern Michigan.

The threat for elevated Ozone levels could linger Thursday as stronger southwest winds develop ahead of a weak front forecasted to pass the state late in the day. The stronger wind flow will aid in the transport of pollution from northern Illinois/Indiana to West Michigan. Plus, there is not much moisture with this front so plenty of sunshine and hot temperatures will continue Thursday. Conditions will be reviewed again on Wednesday to decide if the Ozone Action Day will be continued into Thursday.

PM2.5 levels were ranging in the upper Good to middle Moderate range on Tuesday and these readings were slowly increasing. A continued climb in PM2.5 is expected with levels statewide in the Moderate range by Wednesday.


Without a clean air mass change expected over the next few days these conditions may persist into the weekend. The next stronger cold front should pass the area late Saturday/early Sunday. Until then we will be keeping a close eye on the air quality for Michigan.

Forecast updated by Stephanie Hengesbach: Tuesday, July 31st, 2007

Next forecast update: Wednesday, August 1st, 2007


Ontario Smog Advisory....issued this afternoon...

A SMOG ADVISORY* has been issued by the Ontario Ministry of the
Environment for the following forecast regions:

For: Tuesday July 31, 2007

Huron - Perth
London - Middlesex
Sarnia - Lambton
Windsor - Essex - Chatham - Kent

Advisories will remain in effect until further notice.

For more details visit the Air Quality Ontario website at:

During the smog episode, individuals may experience eye
irritation. Heavy outdoor exercise may cause respiratory
symptoms such as coughing or shortness of breath. People
with heart or lung disease including asthma may experience
a worsening of their condition.

* A Smog Advisory means that there is a strong likelihood
that there may be poor air quality within the next 24 hours
due to ground-level ozone and/or particulate matter.

Spare the Air Actions

During a smog advisory, there are a number of actions that you can
take to help spare the air.

Travel tips - all year round:
- leave your car at home - walk, cycle, carpool or take public transit
- tele-conference instead of driving to meetings
- limit car trips by doing all your errands at once, and do
not let your engine idle
- keep your car well tuned, check your tire pressure and
drive at moderate speeds

Health tips:
- avoid exposure to vehicle exhaust fumes
- consult your doctor for specific health advice
- wear light clothing at work while air conditioning is reduced
- avoid strenuous exercise in the heat of the day

Electricity saving tips:
- save electricity at home by setting your air conditioner
temperature a few degrees higher (health permitting) and turning
off lights you are not using

Other pollution reduction tips:
- leave lawn mowing for another day
- restrict the use of gasoline-powered equipment
- delay using oil-based paints, solvents and cleaners

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