 A wake low , or wake depression , is a mesoscale low @-@ pressure area which trails the mesoscale high following a squall line . Due to the subsiding warm air associated with the systems formation , clearing skies are associated with the wake low . Once difficult to detect in surface weather observations due to their broad spacing , the formation of mesoscale weather station networks , or mesonets , has increased their detection . Severe weather , in the form of high winds , can be generated by the wake low when the pressure difference between the mesohigh preceding it and the wake low is intense enough . When the squall line is in the process of decay , heat bursts can be generated near the wake low . Once new thunderstorm activity along the squall line ends , the wake low associated with it weakens in tandem . 
