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Wind erosion: The detachment and transportation of soil by wind. Wind erosion is a cropland management concern in the Plains states.
Wind shear: The change of wind speed or direction with distance, usually vertical.
Wind vane: An instrument that determines the direction from which a wind is blowing.
Wind waves: Short period and irregular waves created by the flow of air over the water.
Windbreak: A living barrier that usually includes several rows of trees, and perhaps shrubs, located upwind of a farm, field, feedlot or other area and intended to reduce wind velocities. Windbreaks, also called shelterbelts, can reduce wind erosion, conserve energy or moisture, control snow accumulations, and provide shelter for livestock or wildlife.
Winter storm: A heavy snow event. In the Sierra Nevada below 7000 feet, a snow accumulation of >6 inches/12 hrs or >12 inches/24 hrs; and above 7000 feet, >8 inches/12 hrs or >18 inches/24 hrs.
Withdrawal use of water: The water removed from the ground or diverted from a stream or lake for use.
Wood energy: Wood and wood products used as fuel, including roundwood (i.e., cordwood), limbwood, wood chips, bark, sawdust, forest residues, and charcoal.
Working Poor: Workers earning inadequate income as judged by government-established standards of poverty.
WSFO: Weather Service Forecast Office.