Layer PW Gradients Helpful With Placement Of Storms In KY and TN.

Below is the 4 panel LAP Layer PW product at 2100 UTC. The total PW image in the upper left, and the 700-300mb layer PW in the upper right, were showing a plume of PW from eastern KY into south central TN.

The MRMS 0.5 degree reflectivity image below shows a broken line of showers and some storms from eastern KY into north central TN. This corresponded to the backside gradient of PW described above. These gradients are a good way to find more favorable areas for convective development. JJW