Following an active afternoon and early evening that left thousands without power and downed multiple trees and power lines across portions of the Tri-State, it looks as though quieter conditions are gearing up for a return to the Ohio Valley. The last of our shower and thunderstorm activity should exit east of the Tri-State between 9PM and 10PM this evening, leaving us with lingering cloud cover and more mild air despite a weak northerly wind flow overnight. Morning low temperatures are expected to dip toward the upper 60s and low 70s early Friday morning - well fall to 69° in the River City. While today's passing cold front isn't expected to have much effect on our temperatures for the end of the work week, the amount of humidity in the air will be slightly more barrable; dew points routinely pushing 70° in recent days will be closer to 65° for much of our Friday.
While our humidity won't be quite as stifling Friday, we're still in for a scorcher of an afternoon; peak temperatures will again reach the upper 80s and low 90s. Heat indices are still expected to inch toward 94° or 95° in some spots tomorrow afternoon. In addition to Friday's heat, the Storm Prediction Center has already placed portions of the Tri-State under a threat for Severe Weather for late Friday night and early Saturday morning. A large cluster of thunderstorm activity will form across Iowa, Illinois and Missouri Friday afternoon and early evening; current model data suggests that these storms may continue to intensify through the late evening and could reach the Tri-State just before midnight Saturday morning. The greatest concern aside from the timing of the system (10PM-7AM) will be the threat of damaging straight-line winds and large hail. We'll continue to monitor the situation over the next day.