Definitions for "ISALLOBAR"
a line on a map passing through all the places with equal changes in pressure over a certain period
A line of constant barometric tendency. Such lines are drawn on synoptic charts, mainly as an aid to forecasting the movement of features of the pressure distribution.
A line on a weather map drawn through points where similar changes in barometric pressure have occurred in a given period of time. Isallobars show regions of rising and falling pressure.