Several tornado warnings are happening in southern Mississippi. STP (Significant Tornado Parameter) values are in excess of 4 (anything over 1 is concerning!).
STP over west Alabama creeping up to around 1.5 as of 4PM. Atmosphere is becoming more unstable. pic.twitter.com/NWBclvazt8
— Spinks Megginson (@rzweather) December 16, 2019
