Day: August 20, 2022

Gravity The force of attraction of the earth on an object. The direction is downward relative to the earth, and it decreases with elevation or

Greenhouse Effect The overall warming of the earth’s lower atmosphere primarily due to carbon dioxide and water vapor which permit the sun’s rays to heat

Greenwich Mean Time (GMT) The name of the twenty-four hour time scale which is used throughout the scientific and military communities. Standard Time begins at

Ground Clutter A pattern of radar echoes reflecting off fixed ground targets such as buildings or hills near the radar. This may hide or confuse

Gulf Stream The warm, well-defined, swift, relatively narrow ocean current which exists off the east coast of the United States, beginning near Cape Hatteras. The

Gully Washer A heavy rain shower that occurs suddenly, possibly creating a flash flood. Shower Precipitation from a convective cloud that is characterized by its

Gust A sudden significant increase in or rapid fluctuations of wind speed. Peak wind must reach at least 16 knots (18 miles per hour) and

Gust Front The leading edge of the cool, gusty surface winds produced by thunderstorm downdrafts. Sometimes confused with an outflow boundary. Gust A sudden significant