From the Knox County Emergency Management Agency Director, Mark J. Maxwell
Please find attached the latest forecast from the Cleveland Office of the National Weather Service (NWS). The NWS is pretty confident that strong storms will develop over Illinois. The impact to Knox County will depending on exactly how the storm system develops. Knox County will receive thunderstorms with periods of heavy rain with totals of possibly 2-3 inches. There is a risk of flooding. Hail is also possible but it appears the highest threat will be high wind. It is estimated the strongest portion of the storm system will strike know county approximately 10 hours after it develops over Illinois, likely between midnight and 6 a.m.
There is also a slight possibility of a derecho. If it does occur, the derecho pattern will be visible on weather radar over Indiana before it reaches Ohio.