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A squall line is an elongated line of severe thunderstorms that can form along or ahead of a cold front. [35] [36] The squall line typically contains heavy precipitation, hail, frequent lightning, strong straight line winds, and possibly tornadoes or waterspouts. [37]
Thunderstorm asthma is the triggering of an asthma attack by environmental conditions directly caused by a local thunderstorm. During a thunderstorm, pollen grains can absorb moisture and then burst into much smaller fragments with these fragments being easily dispersed by wind.
A derecho (/ ˈ d ɛ r ə tʃ oʊ /, from Spanish: derecho [deˈɾetʃo], 'straight') [1] is a widespread, long-lived, straight-line wind storm that is associated with a fast-moving group of severe thunderstorms known as a mesoscale convective system. [2] Derechos cause hurricane-force winds, heavy rains, and flash floods.
A cumulonimbus incus is a mature thunderstorm cloud generating many dangerous elements. Lightning : this storm cloud is capable of producing bursts of cloud-to-ground lightning. Hail : hailstones may fall from this cloud if it is a highly unstable environment (which favours a more vigorous storm updraft ).
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
Thunderstorms and heavy rain will persist across parts of the UK, as summer officially comes to an end. Thunder and lightning, hail and rain struck various parts of the country on Saturday ...
"A dark and heavy wall built up around the northwest coming fast, coming like those heavy thunderstorms, like a shot. In a few moments, we had the severest snowstorm I ever saw in my life with a terrible hard wind, like a Hurricane , snow so thick we could not see more than 3 steps from the door at times."
Cold fronts often bring rain, and sometimes heavy thunderstorms as well. Cold fronts can produce sharper and more intense changes in weather and move at a rate that is up to twice as fast as warm fronts, since cold air is more dense than warm air, lifting as well as pushing the warm air preceding the boundary.