prefrontal squall line

prefrontal squall line

[prē′frənt·əl ′skwȯl ‚līn]
(meteorology)
A squall line or instability line located in the warm sector of a wave cyclone, about 50 to 300 miles (80 to 480 kilometers) in advance of the cold front, usually oriented roughly parallel to the cold front, and moving in about the same manner as the cold front. Also called nonfrontal squall line; pre-cold-frontal squall line.
References in periodicals archive ?
Papers that Chester was most proud of included his study of a prefrontal squall line (1950), work with Harriet on large convective clouds in shear (1959), and a description of the movement of convective storms with J.
The hourly precipitation forecasts (Figure 4(a)) for the August 01, 2009, prefrontal squall line (Figure 4(b)) ranged from 0 to 5 mm average over the watershed.
Floods are in general caused by two or more consecutive precipitation events, prefrontal squall lines followed by cold fronts.