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.
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Beneficial rain will help ease the brush fire danger across Florida at midweek and bring an end to a prolonged stretch of dry weather.
A storm will continue to unleash heavy rain, gusty winds and mountain snow across Northern California into Tuesday.
The risk for severe thunderstorms will ramp up across the Ohio Valley states and lower Great Lakes region to end the week.
Several storm systems will bring rounds of gusty winds and rain to Germany this week.
Blustery showers and strong wind gusts will lead to difficult travel at times this week.
Heavy snow and gusty winds may unfold as a strong storm system sweeps colder air across the central United States late this week.
Tropical Cyclone Alfred will threaten coastal communities around the Gulf of Carpentaria with flooding downpours through early this week.
A stormy weather pattern unfolding across Europe this week will lead to showers and gusty winds sweeping into Germany on a daily basis.