
I'm writing this on a plane to Memphis, Tennessee, where after landing we'll drive another two hours north to a spot hammered by storms and tornadoes on Sunday. Sadly, the number of deaths from these storms is in the double digits. Watches and warnings were posted well ahead of time, but the storms moved so fast people were bound to get hurt.
Already this year, we have seen about five times the average number of tornado reports. That's a bit scary, considering the severe weather season is just getting started.
Typically, when daylight savings time begins, tornado season starts to crank up, eventually peaking in May. The main reason this time of year is so active is because the atmosphere is transitioning from winter to summer. This results in a clash of hot and cold air masses. Spring is more active than fall for tornadoes because the upper atmosphere is still cool in spring, making it more unstable. Also, the days are longer and the sun is stronger in late spring.
The most prominent spot for tornadoes is in the plains, stretching into the Ohio and Tennessee valleys. Dry heat from Mexico and moist air from the Gulf only add fuel to the fire. Supercell thunderstorms producing strong tornadoes are often the result.
Tragically, that's what happened last night in northwestern Tennessee.