Very warm and muggy weather is here to stay for a while, along with isolated showers and thunderstorms. The best shot for rain will be Wednesday night and Thursday with a passing cold front.
High pressure over the southeast will keep a warm and humid southwest breeze going today. An isolated shower or storm will also be possible just about anywhere in the region with the afternoon and evening heat. Coverage will be limited and the vast majority of the area will remain dry.
Heat index values will likely remain just below advisory levels today. With that being said, it will still be a miserable day for anyone working outside or in a non-air conditioned place. Air temperatures will approach 90 degrees and heat index values will likely reach the mid to upper 90s.
It will remain warm and muggy overnight with temperatures cooling off only to the low 70s in most neighborhoods. Baring an isolated thunderstorm, we will again remain dry.
Tuesday will likely be the hottest day this week. The models indicate even less in the way of high clouds tomorrow afternoon so expect temperatures to top out around 90/92 degrees in most places. With dew points in the 70s again tomorrow, it will be another hot and humid day. Warm upper-level temperatures will ‘cap’ the atmosphere, preventing thunderstorm development.
WEDNESDAY THROUGH THURSDAY
Wednesday will still be a very warm and humid day but a brief respite from the heat and humidity will get underway late in the day as low pressure tracks across the upper Great Lakes. The low will drag a cold front across east-central Ohio late Wednesday afternoon and evening.
Scattered showers and thunderstorms will develop in the moderately unstable atmosphere ahead of the front. As f today, computer modeling brings the front through Wednesday night when support for strong/severe storms will be decreasing.
Residual showers and thunderstorms will continue into Thursday morning with improving weather during the afternoon. Temperatures will be noticeably cooler Thursday behind the front with highs Thursday afternoon around 80 degrees. Dew points will also get knocked back to more comfortable levels.
FRIDAY THROUGH SUNDAY
The break from warm temperatures and tropical humidity will be a short one. High pressure will build over the region and shift east to New England. Temperatures and moisture will begin to creep back up Friday through the weekend. Odds for a shower or a storm will return Saturday with better chances on Sunday as the next low pressure system crosses the Great Lakes.
It’s a way off yet for specifics but looks warm and toasty for Labor Day. As a matter of fact, it looks as if we’ll be basking in warmer than average temperatures through the long range as we head toward the autumn season.