Monday will be hot and humid with instability that will result in showers and thunderstorms. There is a marginal risk of strong to severe storms with heavy downpours, frequent lightning and damaging hail and wind. After a cold front passes, Tuesday and Wednesday will be less humid and warm. MARINE FORECASTLake ErieSaturday Night: Wind S 4-8 knots, Waves 0-1 ft., Water Temp 80 degreesSunday: Wind SW 10-15 knots, Waves 0-1 ft., Water Temp 80 degreesLake HuronSaturday Night: Wind S 4-8 knots, Waves 0-1 ft., Water Temp 73 degreesSunday: Wind SW 10-15 knots, Waves 0-1 ft., Water Temp 73 degreesLake St. ClairSaturday Night: Wind S 4-8 knots, Waves 0-1 ft., Water Temp 76 degreesSunday: Wind SW 10-15 knots, Waves 0-1 ft., Water Temp 76 degreesUP NORTH FORECASTNorthern Lower PeninsulaSaturday Night: Partly cloudy and warm. Remember to download the FREE Local4Casters weather app -- its easily one of the best in the nation.