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Tonight's forecast: Mostly clear, a bit on the muggy side

High heat and humidity build tomorrow
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Posted at 3:29 AM, Jul 17, 2020
and last updated 2020-07-17 22:49:06-04

GRAND RAPIDS — The forecast from FOX 17 Meteorologist Erik Kostrzewa: After a quiet night with seasonably warm temperatures, a strong southwest flow will bring a hot and humid Saturday to the area. There is also an Air Quality Alert for Saturday, as air quality is expected to go into the "unhealthy for sensitive groups" range for Kent county and many of our lakeshore counties. A Heat advisory for heat indices around 100° tomorrow afternoon and evening is in effect for Berrien, Cass, St. Joseph and Branch counties. An approaching cold front could bring some storms to the area after midnight Saturday night and into Sunday. A few of those storms could be strong to severe with damaging wind and very heavy rain.

TONIGHT: Mostly clear and a bit muggy. Lows in the middle to upper 60s. Southwest wind around 5 mph becoming calm.

TOMORROW: Partly cloudy, hot and humid. Highs in the lower 90s. Heat indices in the upper 90s to near 100°. South/southwest winds at 5 to 15 mph.

TOMORROW NIGHT: Increasing clouds, with a chance of showers and thunderstorms well after midnight. Very warm and muggy with lows in the middle 70s. South/southwest winds at 5 to 15 mph.

SUNDAY: A chance of showers and thunderstorms, mainly before 2 P.M. Partly sunny. Still very warm and humid. Highs in the middle 80s. Southwest winds at 10 to 15 mph.