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Terms and Definitions
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Water Repellency
The resistance to soil wettability, which can be increased by intense fires.
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Water Tender
A ground vehicle capable of transporting specified quantities of water.
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Weather Information and Management System (WIMS)
An interactive computer system designed to accommodate the weather information needs of all federal and state natural resource management agencies. Provides timely access to weather forecasts, current and historical weather data, the National Fire Danger Rating System (NFDRS) and the National Interagency Fire Management Integrated Database (NIFMID).
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Wet Line
A line of water, or water and chemical retardant, sprayed along the ground that serves as a temporary control line from which to ignite or stop a low-intensity fire.
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Wildland Fire
Any nonstructure fire, other than prescribed fire, that occurs in the wildland.
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Wildland Fire Implementation Plan (WFIP)
A progressively developed assessment and operational management plan that documents the analysis and selection of strategies and describes the appropriate management response for a wildland fire being managed for resource benefits.
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Wildland Fire Situation Analysis (WFSA)
A decision-making process that evaluates alternative suppression strategies against selected environmental, social, political and economic criteria. Provides a record of decisions.
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Wildland Fire Use
The management of naturally ignited wildland fires to accomplish specific prestated resource management objectives in predefined geographic areas outlined in Fire Management Plans.
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Wildland Urban Interface
The line, area or zone where structures and other human development meet or intermingle with undeveloped wildland or vegetative fuels.
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Wind Vectors
Wind directions used to calculate fire behavior.
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