A pulse storm is a single cellthunderstorm of substantial intensity which only produces severe weather for short periods of time. Such a storm weakens and then generates another short burst – hence "pulse".
Single cell thunderstorms ordinarily form in environments with low wind shear and moderate instability, with the low wind shear contributing to a short average lifespan of less than an hour.[1] When the instability, calculated by convective available potential energy (CAPE), is strong, the updraft will bring a larger amount of humid air very high above ground and generate a cumulonimbus cloud with high water and ice content.[2] When the rain content, and even hail, falls from it, they can generate damaging winds brought about by downbursts. Rarely, a weak tornado develops in association with a pulse storm as the environment is only weakly sheared, or not at all.[3]
Life cycleedit
Life cycle of a pulse storm.
One can distinguish three stages in the evolution of a pulse storm:[2]
Formation: the upward current of the cell intensifies and allows the condensation of water vapor from the rising air parcel. This forms a cumulus congestus, then a cumulonimbus when ice crystals form at its apex which spreads horizontally in contact with the tropopause.
Maturity: downdrafts are emerging. This stage is accompanied by characteristic phenomena such as lightning and thunder, showers, and gust front.
Dissipation: the cold pool descending from the cloud extends to the Earth's surface and helps to block the feed by pushing the updraft downstream. The outflow can then serve as a trigger for other single cell thunderstorms.
pulse, storm, pulse, storm, single, cell, thunderstorm, substantial, intensity, which, only, produces, severe, weather, short, periods, time, such, storm, weakens, then, generates, another, short, burst, hence, pulse, contents, description, life, cycle, also, . A pulse storm is a single cell thunderstorm of substantial intensity which only produces severe weather for short periods of time Such a storm weakens and then generates another short burst hence pulse Contents 1 Description 2 Life cycle 3 See also 4 ReferencesDescription editSingle cell thunderstorms ordinarily form in environments with low wind shear and moderate instability with the low wind shear contributing to a short average lifespan of less than an hour 1 When the instability calculated by convective available potential energy CAPE is strong the updraft will bring a larger amount of humid air very high above ground and generate a cumulonimbus cloud with high water and ice content 2 When the rain content and even hail falls from it they can generate damaging winds brought about by downbursts Rarely a weak tornado develops in association with a pulse storm as the environment is only weakly sheared or not at all 3 Life cycle edit nbsp Life cycle of a pulse storm One can distinguish three stages in the evolution of a pulse storm 2 Formation the upward current of the cell intensifies and allows the condensation of water vapor from the rising air parcel This forms a cumulus congestus then a cumulonimbus when ice crystals form at its apex which spreads horizontally in contact with the tropopause Maturity downdrafts are emerging This stage is accompanied by characteristic phenomena such as lightning and thunder showers and gust front Dissipation the cold pool descending from the cloud extends to the Earth s surface and helps to block the feed by pushing the updraft downstream The outflow can then serve as a trigger for other single cell thunderstorms See also editProject NIMRODReferences edit Jeff Haby What is a pulse storm www theweatherprediction com Retrieved February 20 2020 a b Departement of Atmospheric Sciences Evolution of a Single Cell Storm ww2010 atmos uiuc edu University of Illinois Retrieved 2020 02 19 Pulse storm Glossary US National Weather service Retrieved February 20 2020 nbsp This article about atmospheric science is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Pulse storm amp oldid 1211593571, wikipedia, wiki, book, books, library,
