An abrupt discharge of electricity through the air that produces a quick flash of bright light.

A tool that measures temperature.

A narrow funnel of powerful, rapidly whirling wind that stretches from a cloud to the ground, and can travel from speeds of 34 mph to 150 mph (or more).

A localized storm involving lightning, thunder, strong winds, heavy rain, and sometimes hail or tornadoes.

A shockwave of sound produced as lightning heats the air.

A tool that measures atmospheric pressure.

A tornado that forms over water; generally not as powerful as land tornadoes.

Long, narrow lines of thunderstorms around the eye wall at lower altitudes that rotate around the eye.

Appears as flashes of light that seem to light up the entire sky.

A tool that measures relative humidity.

Any low-pressure system in which winds rotate counterclockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere.

A line of advancing thunderstorms?

This releases tremendous energy, bright light, and thunder.

A gage that records the speed and direction of wind near the surface of the earth.

A funnel shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud.

An unorganized mass of low pressure, thunderstorms with very little, if any, organized wind circulation.

An electron stream that jerkily travels from a cloud during a thunderstorm.

A device using a laser or other light source to determine the height of a cloud base.

The name given to a powerful tornado that form the rotating updrafts found in many supercell thunderstorms.

A fierce, single-updraft thunderstorm that usually occur during the spring and early summer.