Jennifer Edwards Baker reports:
This will be our fifth day in a row with blistering heat and humidity at 90 degrees or above, but relief is in sight.
A cold front from the Great Lakes region is headed to Greater Cincinnati and Northern Kentucky, bringing a 70 percent chance for rain by Saturday afternoon.
Less humid air will arrive Sunday, with the daytime high temperature in the 80s for the first time in a week, according to the National Weather Service in Wilmington.
First, though, we are going to bake one more day as the worst heat wave so far this summer keeps much of the Eastern portion of the country and Midwest in the oven.
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A heat advisory remains in effect until 9 p.m. tonight for our entire region, and an excessive heat warning also is in effect for Hamilton and Montgomery counties, which includes the cities of Cincinnati and Dayton.
It’s 76 degrees this morning at Cincinnati/Northern Kentucky International Airport. The lunchtime forecast calls for temperatures in the upper 80s with the high topping out at 91 with a heat index of 101 by 5 p.m.
Once the advisories expire tonight, it will still be muggy with an overnight low of 73, said meteorologist John Franks. There’s a slight, 20 percent chance for showers and thunderstorms.
The best shot at shower and thunderstorms will come after 2 p.m. Saturday as the cold front arrives. There’s a 70 percent chance for precipitation. Otherwise, it will be partly sunny with a high of 89.
More storms could develop overnight Saturday into Sunday. It will be mostly cloudy with a low around 69.
Sunday will be partly sunny and noticeably less humid with a high of 87 degrees, right around normal for this time of year.
Next week, daytime high temperatures will remain in the upper 80s with overnight lows in the upper 60s.
As hot as this week has been, we are not near record high temperatures or even the worst heat wave on record, Franks said.
Today’s heat record will remain intact at 101 degrees, set on this date back in 1887.
And, last summer, the mercury soared to 99 degrees or higher for five days in a row, ending on July 8, 2012, Franks said. Additionally, we sweated through two straight weeks of 90 degree weather or hotter in June and July last summer, with that streak ending on July 11, 2012.
Our region also cooked under three consecutive days of temperatures at or above 100 degrees in August 2007, July 1988 and July 1983, he said.