Thunderstorms get scarier all the time. And you have global warming to thank for that! Scientists at Stanford University are saying that global warming is expected to cause the “perfect storm” of conditions to produce severe thunderstorms across the U.S. in the next century. Through a climatemodel experiment, they found that global warming will increase convective available potential energy (or CAPE), which is created when air in the low atmosphere warms and rises carrying moisture with it. It then interacts with strong vertical wind shear--a strong moving wind current that sustains a storm. Storms like this also lead to tornado formation they say, so get out a raincoat and take cover!