Another powerful severe weather outbreak strikes the south. Multiple large tornadoes were reported on the ground. Including a deadly tornado in Madill, OK where our Field Correspondent Tony Russell was able to get damage video at first light. https://twitter.com/WeatherNation/status/1253311461582974976 https://www.facebook.com/WeatherNation/videos/571366170167220/   The threat for severe thunderstorms continued overnight into Thursday morning into the Mississippi Delta region. Areas generally along and east of the Red River were under a risk for severe weather. Warm temperatures, coupled with high humidity and a strong jet stream created severe thunderstorms overnight and early Thursday morning. The added moisture was mostly supplied by a rich flow from Gulf of Mexico. Climbing temperatures produced plenty of energy (CAPE) to fuel stronger storms. For Thursday, a strengthening low pressure center will continue to push eastward toward the Mississippi River delta. Thunderstorms will fire ahead of the main cold front.  Initially forming as supercells, the thunderstorms will likely develop into a line, bringing straight-line wind damage.  However, the threat for tornadoes will remain.There will also be very heavy rainfall.  This could lead to flooding in some areas. WeatherNation will keep you updated on the severe weather threat on-air and online. Be sure to check back for updates!