The sum of the changes in the value of natural resources affected by a fire. The basis for computing NVC is each resource's fire-induced value change (pluses and minuses) as computed and expressed on a per unit basis.

The relative change of some measurable quantity with change of temperature, like burning time per unit length, mostly expressed as mean change per degree in percentage of mean temperature within a certain range.

A designated area where unused quantities of water or fire retardant may be jettisoned, usually to permit an airtanker to land with less than a full load.

To jettison a load of water or retardant from an aircraft, or terminate a preplanned aircraft maneuver.

Wind directions used to calculate fire behavior.

According to the American Meteorological Society, the general name for instruments designed to measure total wind speed.

A coloring agent used in fire retardants that is designed to fade rapidly following retardant application in order to minimize the visual impacts of the retardant.

A fitting that may be installed between lengths of hose to provide an independently controlled outlet for a branch line.

The un-consumed grass stems and heads of cured grass left lying on the ground after the passage of a fire that under certain circumstances point in the direction that the fire came from. One of the 11 NWCG categories of fire pattern indicators.

Towering cumulus clouds which may lead to thunderstorms later in the day.