The Storm Prediction Center has placed a good chunk of the Tri-State under a threat for Severe Weather overnight and early Saturday morning. A cluster of shower and thunderstorm activity spanning much of Southern Iowa, Northern Missouri and Western Illinois is expected to gradually shift southeastward during the next several hours. Current model data suggest that the majority of these storms will likely lose much of their potency as they make the trip toward the Tri-State, but there's a possibility some cells may remain strong to even Severe by the time the settle into the Ohio Valley between 2AM and 3AM Saturday morning.
The primary threats from any storms we see overnight or early tomorrow will be damaging straight-line winds in excess of 60 mph along with large hail. The latest model data indicates that the initial cluster of storms will pass across the northern half of the region between the hours of 3AM and 6AM. A secondary line of shower and thunderstorm development may follow shortly thereafter, spreading southward across the entirety of the Tri-State between 6AM and 9AM. From there, on and off showers and storms will continue to affect the Ohio Valley through the remainder of our Saturday morning and afternoon; the Threat of Severe Weather is expected to continue for this period - anyone of these sporadic storms may produce damaging winds and large hail. An isolated tornadic threat cannot be ruled out especially tomorrow afternoon and early evening.