A trough of low pressure extending northward from the Gulf Coast into the Ohio Valley will move slowly east today. This will continue to feed ample Gulf moisture into the area, allowing a steady moderate rain to continue into the afternoon hours. The heaviest rain will affect areas east of I-65, especially across south-central Kentucky and the southern Bluegrass region of Kentucky. Many locations have already received a half to three quarters of an inch of rain. Right now it looks like a total of 1 to 2 inches of rain could fall, especially nearest the Kentucky/Tennessee border (see Hydrometeorological Prediction Center's image of total rainfall below).
Thus, Mother's Day unfortunately looks like a washout for many areas. Ample rainfall and cloudy conditions will make temperatures struggle to get out of the 60s this afternoon. Mothers will need extra flowers for this potentially dreary Sunday!