isallobar lines

isallobar lines

isallobar lines
Lines drawn connecting places having equal pressure tendencies. The change in pressure during the period of three hours prior to the time of observation is called the pressure tendency. The tendency can be calculated after a lapse of 12 or 24 h value also. See also pressure tendency.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved