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 Action Day
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Air Quality Index (AQI)
observed at 18:00 EDT
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Health Message: None |
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here. |
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| Air Quality Index (AQI) |
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Moderate |
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Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. |
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| Air Quality Index (AQI) |
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Good |
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Health Message: None |
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Forecast Discussion: FORECAST SUMMARY: Saturday, July 14th, 2018 through Monday, July 16th, 2018 Ozone: 8-hour Ozone concentrations will be generally Good to Moderate. PM-2.5: 24-hour Fine Particulate concentrations will remain mostly Low Moderate. FORECAST DISCUSSION Clouds and scattered showers will be sufficient to hold down ozone production during Saturday. Fine particulate numbers will continue to slowly creep up but should stay in the Low Moderate range. The question of the day will be what Sunday is likely to produce. The weak front crossing the state on Saturday will wash out allowing partly sunny skies during Sunday. I expect significant ozone to form over the lake but I expect the wind profile to keep that dirty cloud closer to the Wisconsin shore. In southeast Michigan, light winds will begin the day from the northwest but will become more southerly by mid-afternoon. After the wind switches direction, there should not be enough time for ozone levels to increase enough to cause problems. The chance for scattered showers will also persist during the day. Dew points will likely cross the 70 degree mark and the excessive moisture will help retard ozone growth. A stronger cold front will sweep through the state during Monday. This front should clean out the current hot, humid, and dirty air mass and replace it with cooler, drier, and cleaner air. As such, next week should be much more pleasant. EXTENDED FORECAST: Air Quality is expected to be mostly Good beginning Monday night. Forecast updated by Jim Haywood: Saturday, July 14th, 2018 Next forecast update: Monday, July 16th, 2018 |
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AQI: Good (0 - 50)
AQI: Moderate (51 - 100)
AQI: Unhealthy for Sensitive Groups (101 - 150) 
AQI: Unhealthy (151 - 200) 
AQI: Very Unhealthy (201 - 300)
AQI: Hazardous (301 - 500)
National Parks/Monuments
Tribal Boundaries
