How hot or cold the air is.
Temperature
Collections of very small water droplets and ice crystals that form when water is evaporated from the ground and then returns to liquid form in the air.
Clouds
A form of precipitation made up of many ice crystals grouped together that fall to the ground as snowflakes.
Snow
Sound created by the expansion of the air that is suddenly heated by lightning.
Thunder
Tight circle located in the center of an organized storm.
Eye
Changes in weather patterns based on Earth's tilt toward the sun.
Seasons
Nimbus
Cool air pushing in on warm air.
Cold Front
Funnel cloud that comes down out of a storm cloud and actually makes contact with the ground.
Tornado
The edge of a hurricane's eye.
Wall
The study of weather.
Meteorology
Clouds formed by slowly rising air; can occur as high as 20,000 feet and last for days. Name translated means "layer."
Stratus
Warm air slowly rising as the cooler air sinks, causing condensation to take place.
Warm Front
Spinning of the air and the water vapor inside.
Funnel Cloud
Storms organized into a group through strong winds and wind patterns.
Tropical Depression
Water that falls to Earth in the form of rain, snow, sleet, hail, or freezing rain.
Precipitation
Thin, white clouds containing ice crystals; found at 20,000 feet and higher; name translated means "curl of hair."
Cirrus
Rain that falls from the clouds and freezes when it comes in contact with the ground or things on the ground. Occurs when the ground is below freezing, but the air temperature is higher.
Freezing Rain
Scale used to rate the strength of a tornado.
Fujita Scale
A tropical depression that has continued to grow and gain strength.
Tropical Storm
The regions around the equator, characterized by consistently warm temperatures and warm ocean waters.
Tropics
To change back to liquid form.
Condense
32 degrees Fahrenheit
Freezing
Weather-predicting tool that allows the inside of a storm to be seen through computer images.
Doppler Radar