Thunderstorms need three ingredients to form. There needs to be moisture, rising unstable air and lift.

Thousands of thunderstorms form this way during the spring and summer, but only a few produce tornadoes. That's because one other ingredient is needed: wind shear.

It's then that thunderstorms will begin to form. After the initial thunderstorm development, storms that develop after may be able to overcome the atmospheric cap as rain cooled air rushes to the ...

This video explains how microbursts develop during severe thunderstorms. Straight-line winds are common during severe thunderstorms in North Carolina and can cause damage to homes and property ...

Severe thunderstorms have formed over central and eastern Oregon today.At 2:50 p.m., the National Weather Service issued a Severe Thunderstorm Warning for Bend.

There are thousands of thunderstorms in the United States each year, but only a few become strong enough to spin up a tornado.