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Second heat wave of the season begins: Heat indices flirt with triple digits

Another three-day stretch of intense heat and humidity begins Saturday.

Heat indices will be in the mid 90s to triple-digits during peak heating hours this weekend. (Photo: 13 ON YOUR SIDE)

GRAND RAPIDS, Mich. -- Yet another three-day stretch of 90°+ days begins in West Michigan. This time, the humidity will really pack a punch.

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Saturday through Monday, highs are expected to reach the 90s, with Father's Day Sunday being the hottest day of the stretch.

Temperatures will flirt with 90° today and reach into the mid 90s Sunday. Heat index numbers (top line) may exceed 100° on Father's Day.  (Photo: 13 ON YOUR SIDE)

Combine those highs with dew points and heat index numbers climb into the mid 90s to even triple-digits during peak heating hours.

Dew points will be in the mid 60s to low 70s, which will feel oppressive.   (Photo: 13 ON YOUR SIDE)

Saturday morning rain and storms clear out fast, opening the door for the heat and humidity to build.

The heat wave stretches into Monday of the work week. Relief from the heat starts Tuesday.  (Photo: 13 ON YOUR SIDE)

Monday will be the final day with highs in the 90s expected. By the evening, rain and storms move into West Michigan along a cold front. This cold front will bring relief from the high heat and humidity through the rest of the week.

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