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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) Action DayAction Day
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Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Good Good
Health Message: None
Data Not Available
AQI - Pollutant Details
Particles (PM2.5)
Data Not Available
Forecast Discussion: FORECAST SUMMARY: Monday, July 21st, 2014 through Thursday, July 24th, 2014 Ozone: 8-hour concentrations are expected to be Moderate to USG through Tuesday then stay Good for the remainder of the forecast period… PM-2.5: 24-hour Fine Particulate concentrations are also expected to be mostly Moderate through Tuesday then Good for the remainder of the forecast period… FORECAST DISCUSSION: Our Action Day Advisories will continue through Tuesday as some areas of Michigan may see its first 90 degree weather of the summer. Sunday’s Action Day Advisory for West Michigan proved to be accurate as the Holland monitor exceeded the USG threshold while the Coloma and Muskegon monitors just missed the threshold. There is a good chance that our monitors will see even more ozone, during Monday. This trend will continue through Tuesday as increasing southwest winds will drive in more dirty air with creeping temperatures and humidity. Fortunately, we are looking at a cold front approaching from the northwest late Tuesday and into Wednesday morning. This cold front will arrive too late to affect the Tuesday forecast as precipitation associated will not come until later Tuesday night into Wednesday morning. The cold front should be passed by noon on Wednesday. Cooler, dryer air, which seems to be the new normal for this July, will move back into the area and dominate our weather until the weekend. That cooler, dryer air will also provide the region with Good Air Quality. EXTENDED FORECAST: Cooler weather and Good Air Quality should last through the weekend… Forecast updated by Jim Haywood: Monday, July 21st, 2014 Next forecast update: Thursday, July 24th, 2014

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