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Wednesday update for Chevrolet Detroit Grand Prix

6/9/2021

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By: Stephen McCoy
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The forecast from Monday remains mostly the same, with a bit more clarity in conditions. Temperatures will remain mostly stable through the weekend, in the upper 60's for lows and in the mid 80's for highs. Scattered showers may develop Friday afternoon, though Saturday's chances look more likely as a cold front moves through the region; these showers may last into Sunday morning, but no precipitation is expected afterwards.

On Friday, a surface high pressure system will be centered over northern Canada, causing winds in western Michigan from the east/northeast through the day. A low pressure system to the south will result in partly cloudy conditions in the upper levels of the atmosphere during the morning, with lower clouds building in from the north/northwest in the afternoon. Scattered showers may develop in central Michigan during the afternoon and could reach Detroit thanks to mid-level winds from the northwest.

On Saturday, a cold front will approach the region from the west as a surface low pressure system tracks northeastward from the northern Great Plains into Canada. Ahead of the front, winds will shift to the south/southwest, bringing increased moisture to the region. As a result, scattered showers and/or thunderstorms may develop, especially in the late afternoon to evening. Much like on Friday, partly cloudy conditions will be expected in the morning, with lower cloud cover building in the afternoon, now due to the approaching front.

After the frontal passage overnight Saturday into Sunday, winds will shift to the northwest, with increased wind speeds and gusty conditions expected. Clouds over the region will begin clearing, with mostly sunny to full clear skies anticipated for much of the day. A slight chance for isolated showers is present during the morning, still associated with the front, but otherwise, no precipitation is expected.
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