A squall comprises a rather sudden increase of the mean wind speed which lasts for several minutes at least before the mean wind returns to near its previous value. A squall may include many gusts. To top
Atmospheric phenomenon characterized by an abrupt and large increase of wind speed by at least 18 mph and rising to 25 mph with a duration of the order of minutes, which diminishes rather suddenly. It is often accompanied by showers or thunderstorms.
Essentially gusts of longer duration. In Canada, a squall is reported when the wind increases by at least 15 knots over the average speed for a duration of at least 2 minutes and the wind reaches a speed of at least 20 knots.
A sudden onset of strong winds with speeds increasing to at least 16 knots (18 miles per hour) and sustained at 22 or more knots (25 miles per hour) for at least one minute. The intensity and duration is longer than that of a gust. It is reported as "SQ"s in an observation and on the METAR.
Squall is a set of servers for the Peer Distributed Transfer Protocol , a BitTorrent-like protocol with stricter server control and support for exporting large, dynamically changing hierarchical filesystems .