The tornado frequency increases in the spring as the warm and cold seasons battle it out in the U.S.
Warm, humid air surges into the South during the spring months, while colder air remains in place across the northern tier of the country. The clash of warm, humid air and cooler, drier air to the north creates instability for thunderstorms to develop.
Another key ingredient for severe thunderstorm and tornado development is a powerful jet stream, or a corridor of fast winds around the altitude where planes fly. When there are powerful winds high in the atmosphere and weaker winds at the surface, a twisting motion in the atmosphere can help to produce rotating thunderstorms capable of spawning tornadoes.
During the spring months, the jet stream is often still potent across the U.S. before it shifts too far to the north during the summer to support violent storms with tornadoes touching down.
The sun's rays are also strengthening during the spring months, promoting increased daytime heating that further reduces the instability of the atmosphere.
Cyclonic Storm Kyant will unleash heavy rain and strong winds on parts of eastern India later this week as Diwali festivities take place.
A storm will slide in from the Midwest to bring another dose of cold rain and heavy, wet snow to parts of the northeastern United States from Wednesday night into Friday.
As many as three storms will roll in from the Pacific Ocean and bring rounds of soaking rain and high-country snow to California from late this week to early next week.
The severe drought in the northeastern U.S. has left most of the region reeling for months as farmers have been forced to work with arid land.
Dry weather is expected across much of Germany this weekend and will make for ideal conditions for viewing of autumn foliage or attending outdoor events.
Approximately one in 10 Americans may suffer from some degree of severe weather fear, including phobias related to extreme weather events, lightning and even clouds.
Atlantic Ocean (1995)
Trop. storm Tanya develops 600 miles SE of Bermuda. This is hte season's 19th storm - 2nd most active season on record.
Kalamozoo, MI (1997)
Heavy snow brought power lines down, leaving 44,000 people without power.
Rutland, MA (1764)
"...very high wind...snow fell 22 inches deep." Journal of Seth Metcalf, age 20.