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Metro Detroit weather update: Sept. 20, 2021 afternoon, evening forecast

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DETROIT – Here is the Metro Detroit weather forecast update for Sept. 20, 2021 afternoon and evening.

Local forecast

Active week ahead

  • Now through early Friday morning, showers and storms will have a big impact on the area.
  • Storms are likely later Tuesday, which could be strong to severe.
  • Flooding rains looking very possible mid-week. See details below.

Rain rest of Monday

  • A few showers will pass through from south to north for the rest of Monday.
  • No severe weather is expected, but can’t completely rule out a rumble of thunder.

Tuesday rain and storms

  • A few more spotty showers are possible pretty much all day Tuesday, but it’s later in the afternoon and evening that we have the better chance for impactful thunderstorms.
  • These storms will develop around 3/4 p.m. and will be with us until around 10 p.m.
  • There severe threat isn’t super high, but gusty winds over 50 mph and heavy downpours will pose a risk to the area.

Heavy rain midweek

  • Following the storms Tuesday later afternoon and evening, the flooding threat takes over.
  • Overnight Tuesday into Wednesday is when this threat starts and continues through Wednesday and even Thursday. A pre-dawn shower is still possible Friday.
  • By the time all is said and done a solid 3″ is likely areawide. Some spots may be as low as 2″, but some could be close to 4″.
  • A Flash Flood Watch is very possible in the near future.



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