Search results
Results from the WOW.Com Content Network
A squall line, or quasi-linear convective system (QLCS), is a line of thunderstorms, often forming along or ahead of a cold front. In the early 20th century, the term was used as a synonym for cold front (which often are accompanied by abrupt and gusty wind shifts).
A squall line is an elongated line of severe thunderstorms that can form along and/or ahead of a cold front. [11] [12] In the early 20th century, the term was used as a synonym for cold front. [13] The squall line contains heavy precipitation, hail, frequent lightning, strong straight-line winds, and possibly tornadoes and waterspouts. [14]
If outflow boundaries or squall lines form over arid regions, a haboob may result. [21] Squall lines are depicted on NWS surface analyses as an alternating pattern of two red dots and a dash labelled SQLN or squal line, while outflow boundaries are depicted as troughs with a label of outflow boundary.
Straight-line wind damage: A fast-moving squall line of severe thunderstorms can produce straight-line winds on the order of those estimated with EF0 or, in rarer cases, EF1 tornadoes. Downed ...
As such, fine line patterns within weather radar imagery, associated with converging winds, are dominated by insect returns. [15] At the surface, clouds of dust can be raised by outflow boundaries. If squall lines form over arid regions, a duststorm known as a haboob can result from the high winds picking up dust in their wake from the desert ...
A bow echo is associated with squall lines or lines of convective thunderstorms. These echoes can range in size from 20 to 200 km, and have a life span of 3 to 6 hours. Bow echoes tend to develop when moderate to strong wind shear exists in the lower 2 to 3 km of the atmosphere. While similar to squall lines, bow echoes are smaller in scale and ...
A snow squall is a brief period of intense snowfall and wind that leads to whiteout conditions which could trigger dangerous traffic accidents. Snow squalls are most common in the northern United ...
Meso-alpha (meso-α) – 200–2000 km scale of phenomena like fronts, squall lines, mesoscale convective systems (MCS), tropical cyclones at the smaller edge of synoptic scale. [6] Meso-beta (meso-β) – 20–200 km scale of phenomena like mesocyclones, sea breezes, and lake effect snow storms. [6] Mesocale often refers to meso-β scale ...