FORECAST SUMMARY:
FORECAST SUMMARY: Friday, July 16th, 2021 through Monday, July 19th, 2021
Ozone: 8-hour Ozone concentrations are expected to be mostly Good throughout the weekend. There will be some pooling of Ozone over Lake Michigan but with a northeast wind over the weekend, it should keep Ozone concentrations at bay.
PM-2.5: More of the same with PM-2.5 concentrations, northeast winds will keep potential wildfire smoke from entering the area and keeping PM-2.5 concentrations Good.
FORECAST DISCUSSION:
Upper-level temperatures will be in the low-teens for much of the weekend and into next week. Upper-level winds will be from the east which will help to keep wildfire smoke out of our area. Into the weekend a High-pressure system sets up over the Upper Peninsula providing clear and sunny skies for the region.
Surface temperatures look to be in the low-mid 80s for much of the weekend with the lower half of the state dealing with a stalled front which will provide relatively cooler temperatures to start the weekend, but the front will move out going into Saturday night. Surface winds appear to be easterly-northeasterly for the weekend, which, stated above, will help keep near-surface smoke from entering the area. In terms of dewpoint, there will be a rather sharp dewpoint gradient across the state Saturday ranging from the upper 50s to the north and upper 60s to the south. This is due to the stalled front over the Michigan/Ohio border. Going into Sunday as the front moves out, dewpoints drop across the state to the mid-50s.
EXTENDED FORECAST:
Going into Monday and next week, the High-pressure sticks around until a fast-moving cold front comes through from north to south Tuesday and into Wednesday. This cold front may produce some rain, but nothing too much. Overall, for the start of next week, concentrations should be mostly Good.
Forecast updated by Alec Kownacki/Stephanie Hengesbach: Friday, July 16th, 2021.