squall line


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squall line

[′skwȯl ‚līn]
(meteorology)
A line of thunderstorms near whose advancing edge squalls occur along an extensive front; the region of thunderstorms is typically 12 to 30 miles (20 to 50 kilometers) wide and a few hundred to 1200 miles (2000 kilometers) long.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

squall line

A narrow zone of meteorological activity usually parallel or nearly parallel to a cold frontal surface, occurring some distance away. Squall-line activity, or a line squall, is characterized by thunderstorms, heavy rain, brief wind shifts, gusty winds, abrupt pressure rises, and abrupt temperature falls.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
To further evaluate the characteristics of the squall line event simulation, we define the longitudinal center of the squall line as the meridionally averaged zonal maximum of the radar reflectivity in the 26[degrees]-38[degrees]N, 92[degrees]-80[degrees]W domain as illustrated in Figs.
Caption: LEFT: This example of a squall line was marching across the Oklahoma prairie.
The November 15 scourge of twisters formed in a squall line, while the November 6 monster descended from a broken line that formed an out-of-season supercell.
The Dover, Delaware, weather surveillance radar (DOX) showed the squall line and gust front arriving at Horn Point, Maryland (38.587[degrees]N, 76.141[degrees]W), at approximately 0820 UTC (Figs.
Guo, "Analysis and numerical simulation research on severe surface wind formation mechanism and structural characteristics of a squall line case," Chinese Journal of Atmospheric Sciences, vol.
Although the pilot requested assistance in avoiding the "squall line" noted by the controller, he did not provide the pilot with the information as required.
Johnson, 1991: Heat and moisture budgets of an intense midlatitude squall line. J.
This squall line propagated eastward and maintained its identity until 0000 UTC, May 27 (not shown), when it was found over eastern Mississippi (MS), northern Alabama (AL), and eastern Tennessee (TN).
- Anyone interested in seeing the radar image of the squall line as it approached Worcester County can go to www.ToddGross.com.
Once this happens, deep showers and thunderstorms form, commonly producing a squall line in Kansas, Oklahoma, and Texas.
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.