Because it drags in tropical air from the Gulf and Atlantic. Arctic air over the CONUS, especially in the Southeast, is extremely frail when it gets pumped full of moisture. There is a reason why places like Siberia get extremely high rates at low QDF and temps, because cold air by nature is drier. When you pump it full of tropical moisture, it can retain latient heat, which is how we get the warm nose due to the fact the Coriolis Effect of Northern Hemisphere anticyclones drags it on shore at the upper levels and at the surface. Sent from my SM-S115DL using Tapatalk