noun
- lines on a weather map connecting points of equal change in atmospheric pressure over a specified time period
Usage: meteorology; plural form; singular is isallobar
Examples
- Meteorologists use isallobars to identify areas where pressure is rising or falling rapidly.
- The isallobars on the surface analysis chart showed a deepening low-pressure system.
- By studying isallobars, forecasters can predict where severe weather might develop.
- The pattern of isallobars indicated that the high-pressure system was weakening.