Today's peak temperature of 56° wasn't only 12° below average for this time of the year, it also marked our coolest measured afternoon high in nearly six months! The last time we dealt with temperatures this cool was during the afternoon of April 24th. While the combination of overcast skies and breezy northwesterly winds kept those temperatures well below the norm earlier on today, clearer skies this evening could allow some spots to fall back into the upper 30s at times overnight. A resurgence of some added cloud cover early on Saturday however, will help drive the mercury back up toward the mid to low 40s by 6 or 7 o'clock. Dry conditions will also linger into our Saturday morning, but don't expect them to last the day long.
We're already tracking our next round of scattered rainfall - a disturbance forming over the Missouri/Illinois boarder will migrate eastward tomorrow and settle in over portions of the Tri-State by 12PM Saturday. On and off rain chances are expected to affect the Ohio Valley throughout the rest of our Saturday. While we're not expecting a washout by any means, you may want to check that radar before you head out the door tomorrow; you may need that umbrella. While warmer overall, the second round of overcast/rainy weather in as many days will again keep temperature below average Saturday - we'll only reach an afternoon high of 62°. It's expected that those light and sporadic rain showers will also stick around though the overnight hours and even Sunday morning - that being said, the majority of our Sunday will be dry.
Strong southerly winds and dry, clear conditions Sunday afternoon will drive temperatures back into the upper 70s and low 80s ahead of this weekend's most significant round of anticipated rainfall. Lower pressure near the Great Lakes will gradually drag northeastward though the day Sunday; as that occurs, its associated cold front will drag through the Mississippi Valley and up the Ohio Valley late Sunday evening. The interaction between our warm weather and that cold front will produce a well-developed line of thunderstorms. By the time this line reaches our westernmost counties (around 10PM Sunday) some of these storms may be capable of producing damaging straight-line winds, large hail and even isolated tornadic rotation. Due to the threat for Severe Weather the Storm Prediction Center has placed the entire Tri-State region under a threat for Severe Weather Sunday night and early Monday morning.