The latest 0z NAM model forecast continues to highlight the concern of another derecho in the Ohio Valley and Mid Atlantic regions tomorrow, with this latest forecast giving the two Virginias and Kentucky the brunt of this complex.
The image above is valid at 4:00 PM CDT, and highlights 3 hour precipitation in millimeters. Based on the above image, we see a bowing segment placed in West Virginia and Kentucky putting out potentially high precipitation. With any bowing segment comes the risk of damaging winds, but with a derecho this danger is greatly increased.
A derecho is a long-lived wind storm spanning a large area, while a bowing segment involves a small, weaker bow in a much smaller scale region. Considering the strength and span of this bowing segment, as well as the distance it will have travelled (origins from Chicago, IL), I believe that this has the characteristics of a derecho, and would most likely prompt damaging wind potential.
I will issue a special morning post on this matter tomorrow morning with a full model update.
For the initial derecho post, click here.