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Primary air pollutant in the Decatur area:
PM2.5 - 52 Moderate
If you are unusually sensitive to particle pollution, consider reducing your activity level or shorten the amount of time you are active outdoors.
Other Pollutants:
OZONE - 13 Good
Ozone was mostly good on Wednesday, with a couple of moderates near the lake shore, and then all good on Thursday. PM2.5 has also seen a bit of a decrease, with moderate on Wednesday and a mix of good and moderate on Thursday. Today will bring temperatures reaching the low 90's at the warmest. Cloud cover will be scattered, dewpoints will be in the 70's, and there will be a low chance of scattered rain throughout today and tonight. Wind direction will vary throughout the day as wind speeds rise above 5 mph, and mixing heights will reach near 4000 ft at most. Tomorrow will see a decrease in temperatures as a front moves down from the north, with highs staying below 90 degrees, while dewpoints stay around 70 degrees. Cloud cover will be scattered throughout the weekend. Winds will be primarily from the north reaching speeds near 10 mph, and mixing heights will rise to around 3000 ft at most. Sunday will see temperatures reaching the upper 70's at the warmest. Dewpoints will decrease throughout the day, falling to around 60 degrees. Winds will shift to be primarily from the northwest, with wind speeds staying below 10 mph, and mixing heights will reach near 5000 ft at most. Monday will see similar conditions with highs in the upper 70's, dewpoints around 60 degrees, and a decrease in wind speeds. Temperatures will start to increase again on Tuesday, seeing highs reaching around 80 degrees. Dewpoints will be in the 60's, cloud cover will start to increase, and mixing heights will decrease again, reaching near 4000 ft at most. Winds will be primarily from the south at this time reaching speeds over 5 mph. The Canadian model shows good PM2.5 throughout the period while the NOAA 6Z BC model shows a decrease from a mix of good and moderate today to mostly good by Sunday. The NOAA model is more consistent with recent, mixed PM2.5 values. With a front moving down through the region at the start of the period, moderate PM2.5 buildup will become less likely. Moderate PM2.5 will be possible again near the end of the period, however, after a couple of days of relatively light winds. Canadian model shows moderate ozone today, with higher values over and around Lake Michigan, and a decrease into the good range by Sunday. The NOAA 6Z BC model shows a similar decrease, with a mix of moderate and good today, as well as some points of USG near the lake, and then good over the weekend. Even with the high temperatures and sunny skies, high dewpoints and any scattered rain will help to dampen ozone development. As the front moves through and temperatures decrease over the weekend, ozone buildup will become less likely.
Primary Pollutant: OZONE - 0 Good
Secondary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Moderate
Secondary Pollutant: OZONE - 0 Good
Primary Pollutant: PM2.5 - 0 Moderate
Secondary Pollutant: OZONE - 0 Good