The weather service says heat advisory levels will likely be met in many areas Monday, with heat index levels reaching 100 to 105 degrees by the afternoon.
"Early-season hot spell over Father's Day Weekend will likely reach oppressive to unsafe levels on Monday", according to the National Weather Service at State College.
The highest heat index readings will impact the St. Louis metropolitan area.
The big jump in heat and humidity begins on Sunday.
Showers and isolated thundershowers will be possible Monday morning for the metro. The heat wave is not expected to have a significant warming effect on the water because it is still early in the season, Mott said.
Hot for Father's Day Weekend: Saturday looks hotter and drier than Sunday, but neither day offers much heat relief or guaranteed rainfall.
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MONDAY | Continued hazy, hot, and humid with a stray PM storm. A unsafe combination of heat and humidity will be in the region Fridayafternoon and continue at least through early Sundayevening.
Tonight: Partly cloudy and warm.
Heat index values will once again be near 100°, so make sure to stay hydrated and pack the sunscreen for any outdoor plans with Dad.
MONDAY: Mostly sunny and hot, with a high near 95.
Temperatures will flirt with 90° today and reach into the mid 90s Sunday.
A cold front will move through Wednesday into Thursday with some thunderstorms. Our brief heat will be squashed to the south, bringing a drier, more comfortable brand of air back to northern OH by the middle to latter half of next week!