The recent radar trends have been favoring the heaviest axis of
rainfall a bit to the south and east of the 00Z HREF mean
including recent HRRR runs. Adjusting for this, and accounting for
the organized nature of the convection (with aid of 50 to 60 kt
effective bulk shear values), it would appear that the heaviest
axis of rainfall going through the mid-morning hours will tend to
be oriented more to the east-northeast from northern MS and
northern AL over through south-central TN. Although, it appears
that heavy rainfall with bit less intensity will also overspread
eastern TN over the next several hours. Also, areas of far
northwest GA and far southwest NC may see some period of heavy
rain as well.
The hires multi-model suite of guidance would support additional
rainfall amounts as high as 2 to 4 inches with isolated amounts
near 5 inches going through 15Z.