The SPC has outlined this outlook for the day of Friday, May 1st. You can see that the areas in Middle TN sit right on the fringe of the Slight risk zone. The areas that are in this zone are places to the N and NW of Nashville as well as areas in SCK. The biggest threat with this system will be large hail and damaging winds. But we will have to watch it closely as May is one of our big severe weather months.
Today, we will see some widely scattered showers/t'showers today with a few embedded t'storms. We aren't expecting any severe weather today, but in the strongest of storms...you could see some gusty winds and small hail. This activity should begin to "pop" later on this morning into the afternoon hours.
UPDATE: OHX has posted this in their morning AFD. These are a few convective numbers for today's event.
MODIFIED GFS SOUNDING FOR BNA FOR A MAX TEMP OF 77 TODAY SHOWS THE FOLLOWING CONVECTIVE STATISTICS: LI -4, CAPE 1092 J/KG, TOTAL TOTALS 47, PWA 1.32 INCHES