Area forecast discussion National Weather Service Nashville Tennessee 1212 PM CDT Wednesday Jun 19 2013 Update...for 18z aviation. && Aviation... Upper ridging will have a hold on the middle Tennessee weather through the next 24 hours. Mostly VFR conditions will prevail...with isolated-scattered rain showers/thunderstorms and rain being possible this afternoon...and again Thursday afternoon but beyond this 24-hour time period. May introduce a vcsh this afternoon at the area terminals since any convection should be widely scattered...with the best chance occurring between 20z-02z. Will amend should thunderstorms and rain develop near a terminal. Overnight...IFR (mvfr) visibilities may develop at csv (ckv) towards dawn Thursday from light fog but overall conditions will be calm and clear overnight. More scattered cumulus around 4-5kft will develop by the end of this taf period. Light nearly winds today will shift to light southeasterly winds tomorrow. && Previous discussion... /issued 1043 am CDT Wednesday Jun 19 2013/ Update... upper trough will pull away today from the Tennessee Valley with dirty upper ridge trying to build this way. This will lead to a more summery pattern for the next several days. Looking for mostly sunny sky today with light northerly flow down into the middle state. With temperatures getting into the upper 80s isolated afternoon and very early evening convection is expected. Boyd && Ohx watches/warnings/advisories... none. && $$ Alabama