A severe thunderstorm produced hail earlier Tuesday morning in St. Lucie County. Strong thunderstorms need the right ...
A thunderstorm's updraft can tilt this rotating tube vertically ... tornado is the rear-flank downdraft (RFD), which is a cold air current wrapping around the base of the storm.
A mesocyclone (or "meso" for short) is formed when a thunderstorm updraft meets veering winds. As the air rises in the thunderstorm, the winds will begin to twist the updraft until the whole ...