{"thcode":2,"term":{"code":1102,"name":"storms","parent":63,"scope":"Atmospheric disturbances with winds of unusual force or direction. Accompanied by rain, snow, hail, or sleet, and often by thunder and lightning."},"uf":[],"bt":[{"code":63,"name":"atmospheric and climatic processes","parent":101,"scope":"Phenomena affecting or occurring within the mass of gases that surrounds the earth, including its physics, chemistry, dynamics, and weather conditions."},{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":121,"name":"blizzards","parent":1102,"scope":"Severe snowstorms with intense winds."},{"code":1696,"name":"dust storms","parent":1102,"scope":"Atmospheric disturbances in which a significant amount of dust is transported."},{"code":549,"name":"hurricanes","parent":1102,"scope":"Severe cyclones, or revolving storms, originating over the equatorial regions of the earth, accompanied by torrential rain, lightning, and winds with a speed greater than 74 miles per hour."},{"code":568,"name":"ice storms","parent":1102,"scope":"Storms in which falling snow or rain freezes on contact with surfaces on the ground."},{"code":1178,"name":"tornadoes","parent":1102,"scope":"Violent storms characterized by whirling funnels of wind moving at great speeds."}],"rt":[{"code":531,"name":"hazards","parent":1174,"scope":"Potential dangers from both natural processes (e.g., earthquakes, floods, and climate change) and human impacts on the environment."},{"code":731,"name":"meteorology","parent":68,"scope":"Branch of science dealing with the short-term variations of atmospheric conditions including wind, precipitation, temperature, humidity, cloud cover, and air pressure."},{"code":927,"name":"precipitation (atmospheric)","parent":63,"scope":"Any or all forms of water particles that fall from the atmosphere, such as rain, snow, hail and sleet."}]}