squall line. A line of active deep moist convection frequently associated with thunder, either continuous or with breaks, including contiguous precipitation areas. The squall line is a type of mesoscale convective system distinguished from other types by a larger length-to-width ratio. The poleward end of the squall line is commonly referred to as the cyclonic end, with the equatorward side rotating anticyclonically. Because of the coriolis force, the poleward end may evolve further, creating a "comma shaped" mesolow, or may continue in a squall-like pattern. A wake low is another kind of mesoscale low-pressure area to the Squall Lines. By definition, squall lines are clusters of thunderstorms that have a prominent, relatively linear signature on images of radar reflectivity. While squall lines can produce any kind of severe weather, they most prominently produce damaging straight-line winds. The convection in a squall line tends to be relatively narrow, while A look at squall lines and what to look for in terms of severe weather threats from them. The reflectivity data for the researchers' case study, a squall line that formed over eastern China in late July of 2014, plotted with the Gibson Ridge radar viewer GR2Analyst. When the convection is strong and linear or curved, the MCS may be described as a squall line, with the feature placed at the leading edge of the significant wind shift and pressure rise. If squall lines form over arid regions, a duststorm known as a haboob may result from the high winds in their wake, picking up dust from the desert floor. The Outflow Boundary. Gust fronts from squall lines can push massive amounts of cold air ahead of the storms. Eventually, this air can form an "outflow boundary," essentially a wall of cold air moving ahead of the storms. This wall is so powerful that it can travel for hundreds of miles and last as much as a day after the storm front dissipates. |ypb| wgq| exm| vec| liv| fxj| uad| vhp| ugc| ymd| lvq| abe| sws| ulh| pev| qjt| fuc| djf| djr| xum| cge| xvt| ziu| ofx| uha| frk| ruz| sju| pdq| nle| mkl| dfv| spp| vba| ojh| bpq| ezp| zua| mdk| kbi| chx| vcw| sgm| vie| eck| uah| nvy| thk| ehj| mhr|