An area of high atmospheric pressure. Highs generally create cooler, dryer temperatures, with little or no clouds. Hurricane - A tropical cyclone with wind speeds in excess of 74 miles per hour. I Iridescence - Colorful patches in clouds caused by sunlight passing through the water droplets. K Knot - A unit of measuring for speeds of ships and is used in meteorology for wind speed.
All meteorologists currently use knots for plotting wind speed on weather maps.
L Latent Heat - Heat released into the air when water vapor condenses and forms clouds. Lightning - A form of visible electrical discharge between rain clouds or between rain clouds and the ground. M Mesocyclone -A rotating, upward moving column of air in a thunderstorm that can spawn tornadoes. Meteorologist -A scientist who studies and predicts the weather. Multicell Storms - Thunderstorms consisting of clusters of single cell thunderstorms.