Pattern change will bring cooler temperatures after the weekend heat

Today is the beginning of the much-talked-about heatwave. There isn’t much I can add to the conversation at this point. It’s going to get very warm and very uncomfortable outside the next few days. Friday and Saturday will be the worst and an Excessive Heat Watch is in place.

I’ll not waste time preaching about the danger hot and humid weather can have on your health. I’m sure there has already been plenty of that on TV and the internet.

Despite the hot, humid and unstable airmass in place, there will not be much of an opportunity for rain or thunder. Outflow from thunderstorms in western Ohio tonight may spark an isolated storm here in east-central Ohio Friday morning but I wouldn’t count on it. Odds for a thunderstorm will be a little better Friday evening but a strong cap present in the upper levels will be hard to overcome.

The good news is this will not be a long heatwave. The upper-level ridge responsible for the heat and humidity will begin to break down Saturday night. A cold front north of the Great Lakes will start a southward shift and begin moving into northern Ohio on Sunday. Odds for showers and thunderstorms will increase through the day ahead of the front as it advances south.

With a very warm and humid airmass in place Sunday ahead of the front, we will need to monitor for the potential of severe thunderstorms Sunday afternoon and evening as the front makes its way through our area.

Cooler and drier air will spread into east-central Ohio. By Monday, temperatures will return to around average for the daytime high. Tuesday will be even cooler. Dew points will come down drastically on Monday as a cool dry northerly breeze sets up. You may even want to open the windows Monday night and give the A/C a much-needed rest. Temperatures will dip to around 60 Monday night – upper 50s Tuesday night.

This pattern change to a cooler regime is likely to stick around through the latter part of the month.

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