Isolated Storm Chances Today; Severe Saturday?

The map above is the Convective Outlook that I post on here very often when we have severe weather that may be possible. And the second map is the Probability Chart for severe weather potential in any given area. Well the SPC now has all of TN in a slight risk and most of TN in a 30% chance area of seeing severe weather. I'm going to be home all day and will be looking at the models and GFS precip. maps to see what those are saying. But it's still 3 days away so alot could change by then.

For today, however, we have a isolated chance of seeing a pop-up shower/t'storm later on during the heat of the day, but everyone won't see rain. I'm putting the chances at 20-30% for everyone with the western areas of Mid. TN getting the best chance. Here's today's forecasted high's and rain chances.

Nashville: low 90's; 20% chance
Clarksville: low 90's; 30% chance
Cookeville: mid to upper 80's; 20% chance
Columbia: upper 80's to low 90's; 20% chance
Manchester: upper 80's; 20% chance