| A | B |
|---|
| air mass | a large body of air with the propertie of the land mass it's over |
| front | boundary between cold and warm air masses |
| tornado | violent whirling wind that moves over land |
| wind shear | difference between wind direction and speed |
| doppler radar | uses radio waves and monitors the reflected waves from distant storms |
| hurricane | large swirling, low-pressure systems over tropical oceans |
| temperature, density of the air, amount of water vapor | three things that determine air pressure |
| high pressure areas | clear skies, fair weather |
| lightning | build up of electricity in the clouds |
| thunderstorms | heavy rain, lightning, loud thunder |
