Do you know the difference between a hurricane and a typhoon? Find definitions for weather terms from absolute humidity to zonal flow and everything in between in the WeatherBug weather glossary.

Dry Line

A boundary separating moist and dry air masses, and an important factor in severe weather frequency in the Great Plains. It typically lies north-south across the central and southern high Plains states during the spring and early summer, where it separates moist air from the Gulf of Mexico (to the east) and dry desert air from the southwestern states (to the west).

More Glossary Terms:

• Doppler Radar
• Down Slope Winds
• Downburst
• Drifting Snow
• Drought

• Dust Devil
• El Nino
• Equation
• Equilibrium
• Evaporate