National Weather Service United States Department of Commerce

A rare and dangerous weather pattern is emerging for the region. A significant severe weather threat exists tomorrow with intense tornadoes possible in the afternoon and evening. A significant flash flood threat will then emerge over the region through Saturday.
Here is the timing information on the anticipated severe weather threat tomorrow.
Forecast rainfall amounts may end up in historic ranges leading to significant and potentially catastrophic flash flooding across the area. By Saturday evening as much as 10 to 15 inches of rain is anticipated across parts of the region. Flooding in areas that do not normally flood is anticipated.
Here is a multi-day summary of the threats over the next four days.