U.S. Severe Weather Forecast (Convective Outlook)

Day Three

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Storm Prediction Center ac 200730 

Day 3 convective outlook 
National Weather Service Storm Prediction Center Norman OK 
0130 am CST Tue Feb 20 2018 

Valid 221200z - 231200z 

..no severe thunderstorm areas forecast... 

showers and a few thunderstorms are expected from Texas through a 
portion of the Tennessee and Ohio Valley Thursday. 

..Texas into the lower Mississippi, Tennessee and Ohio valleys... 

Upper pattern will remain characterized by a synoptic trough over 
the western half of the U.S. On Thursday. A low-amplitude shortwave 
trough initially over the southern rockies will eject northeast 
through the Central Plains and middle MS valley regions. 
Quasi-stationary front will reside from the middle Atlantic through 
the Tennessee and lower MS valleys to south Texas Thursday morning. This 
boundary may retreat some distance northwest during the period, but 
in general an Ana-frontal southwesterly flow regime will persist 
with episodes of showers and a few thunderstorms occurring primarily 
within zone of isentropic ascent on the cool side of the front. The 
elevated nature of the convection and weak instability should 
preclude a threat for severe storms. 

.Dial.. 02/20/2018