Metro Detroit weather: Heat advisory Sunday with strong showers, thunderstorms possible

Highs in the 90s, heat index near or greater than 100 degrees

Sunday, July 19, 2020 weather forecast

DETROIT – Welcome to Sunday Motown.

Today will have a triple threat - high heat, oppressive humidity and dangerous thunderstorms.

It feels like a sauna as the atmosphere will be thick with moisture. Temperatures quickly rise to the 80s before noon, and the humidity will lead to instability which will lead to showers and thunderstorms forming and racing across the area by middle morning and through the lunch hour.

The National Weather Service has a marginal to slight risk of strong to severe storms with heavy downpours, frequent lightning and damaging winds and hail. Straight-line winds with speeds of at least 60 mph will be the most likely culprit of any damage across the metro area.

Drivers must be wary of localized flooding due to a torrential rain.

Sunday afternoon will be hot and sweltering. Any peek of sunshine will result in temperatures near 95°F. Heat indices will be near 100°F.

A second wave of showers and thunderstorms remain possible during the second half of the day that will potentially be as potent as earlier stormy weather.

Sunday evening will be mostly cloudy with scattered showers. Temperatures will be in the 90s before dinner time and in the upper 80s afterward.

Sunset is at 9:05 p.m.

Sunday night becomes a partly cloudy day mostly clear overnight. Overnight lows will be on the warm side; near 70°F.

Monday will be mostly sunny and hot. Afternoon temperatures will be near 90°F.

Scattered showers and thunderstorms return Tuesday and Wednesday. It will not be as hot with daytime temperatures reaching the middle 80s on Tuesday and in the upper 80s on Wednesday.

Sunshine returns and it becomes more steamy by the end of the week. Thursday’s highs will reach the upper 80s. Friday and Saturday will have high temperatures near 90°F or a bit more.

For an in-depth, interactive live weather radar map, go here: Michigan Weather Radar.


Lake Erie

Sunday: Wind SSW 12-18 knots, Waves 0-1 ft., Water Temp 80 degrees

Lake Huron

Sunday: Wind SSW 10-15 knots, Waves 0-1 ft., Water Temp 74 degrees

Lake St. Clair

Sunday: Wind SSW 6-12 knots, Waves 0-1 ft., Water Temp 73 degrees

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About the Author:

Andrew Humphrey is an Emmy Award winning meteorologist, and also an AMS Certified Broadcast Meteorologist (CBM). He has a BSE in Meteorology from the University of Michigan and an MS in Meteorology from the Massachusetts Institute of Technology, where he wrote his thesis on "The Behavior of the Total Mass of the Atmosphere."