(n.) A violent storm, often of vast extent, characterized by high winds rotating about a calm center of low atmospheric pressure. This center moves onward, often with a velocity of twenty or thirty miles an hour.

air mass anticyclone baguio blaze burst cold front cold sector convulsion dirty weather dust devil eruption explosion fit flare-up foul weather front gale gust high high-pressure area hurricane irruption isobar isometric isometric line isopiestic line isotherm isothermal line line squall low low-pressure area occluded front outbreak outburst paroxysm polar front rainspout rainstorm rotary storm rough weather sand column sandspout seizure snowstorm spasm squall squall line stationary front storm stormy weather tempest tempestuous rage thunderstorm tornado twister typhoon upheaval warm front waterspout weather map whirlblast whirlwind wind eddy wind-shift line windstorm