{"id":15846,"date":"2026-06-13T05:27:20","date_gmt":"2026-06-12T23:57:20","guid":{"rendered":"https:\/\/ibexaviation.com\/pilot-training\/?p=15846"},"modified":"2026-07-26T10:50:30","modified_gmt":"2026-07-26T05:20:30","slug":"thunderstorm","status":"publish","type":"post","link":"https:\/\/ibexaviation.com\/pilot-training\/thunderstorm\/","title":{"rendered":"Thunderstorm"},"content":{"rendered":"<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-1.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<h2>Thunderstorm<\/h2>\n<h3>Types of Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-2.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>A <strong>thunderstorm (TS)<\/strong> is caused by intense convective currents within <strong>Cumulonimbus (Cb)<\/strong> clouds and is officially reported when thunder is heard.<\/li>\n<li>The diameter of a Cumulonimbus cloud can be as much as <strong>10 km<\/strong>.<\/li>\n<li><strong>Single-cell thunderstorms<\/strong> usually occur during the non-winter months due to intense surface heating (air-mass thunderstorms).<\/li>\n<li><strong>Multi-cell cluster thunderstorms<\/strong> are commonly associated with mountains, cold fronts and low-pressure systems.<\/li>\n<li><strong>Multi-cell line thunderstorms<\/strong> develop along squall lines associated with frontal systems.<\/li>\n<li><strong>Supercell thunderstorms<\/strong> may extend into the stratosphere and are capable of producing tornadoes.<\/li>\n<\/ul>\n<h3>Conditions for Thunderstorm Formation<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-3.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Thunderstorms develop in an unstable atmosphere where the <strong>Environmental Lapse Rate (ELR)<\/strong> is greater than the <strong>Saturated Adiabatic Lapse Rate (SALR)<\/strong>.<\/li>\n<li>High humidity and a triggering mechanism are essential for thunderstorm formation.<\/li>\n<li>Common lifting mechanisms include:\n<ul>\n<li>Surface heating (Insolation) causing local convection.<\/li>\n<li>Orographic lifting.<\/li>\n<li>Convergence of air.<\/li>\n<li>Frontal lifting.<\/li>\n<li>Radiational (Katabatic) cooling.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Heat and Orographic Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-4.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li><strong>Heat (Air-Mass) Thunderstorms<\/strong> develop due to intense afternoon heating and the formation of heat lows.<\/li>\n<li>Low pressure causes convergence of warm, humid air, leading to the development of Cumulonimbus clouds.<\/li>\n<li><strong>Orographic thunderstorms<\/strong> occur when warm, moist air is forced to rise over mountainous terrain, particularly during the afternoon.<\/li>\n<\/ul>\n<h3>Steady-State and Frontal Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-5.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li><strong>Steady-state thunderstorms<\/strong> form due to prolonged convergence associated with winds or upper-air troughs.<\/li>\n<li><strong>Frontal thunderstorms<\/strong> usually develop along cold fronts and occasionally along warm fronts.<\/li>\n<li>Strong uplift of warm, moist air along a cold front can produce thunderstorms during both day and night.<\/li>\n<\/ul>\n<h3>Line Squall (Squall Line)<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-6.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Squall lines consist of a series of thunderstorms arranged in a line.<\/li>\n<li>They are typically located <strong>100\u2013300 km<\/strong> ahead of a cold front.<\/li>\n<li>Squall lines may be embedded within layered clouds, making them difficult to detect visually and therefore particularly hazardous.<\/li>\n<\/ul>\n<h3>Mesoscale Convective Complex (MCC)<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-7.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>A <strong>Mesoscale Convective Complex (MCC)<\/strong> consists of multiple clusters of thunderstorms.<\/li>\n<li>MCCs may cover very large areas and are capable of producing cyclones, tornadoes and flash floods.<\/li>\n<\/ul>\n<h3>Cumulus Stage of a Thunderstorm<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-8.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>The initial growth phase of a thunderstorm is known as the <strong>Cumulus Stage<\/strong> and typically lasts <strong>15\u201320 minutes<\/strong>.<\/li>\n<li>The rising air cools initially at the <strong>Dry Adiabatic Lapse Rate (DALR)<\/strong> until saturation occurs.<\/li>\n<li>After saturation, cooling continues at the <strong>Saturated Adiabatic Lapse Rate (SALR)<\/strong>, allowing Cumulus clouds to develop into Cumulonimbus clouds.<\/li>\n<li>Only updrafts exist during this stage, while rain and ice particles grow within the cloud.<\/li>\n<li><strong>Entrainment<\/strong> (inflow of surrounding air into the cloud) occurs during this stage.<\/li>\n<\/ul>\n<h3>Mature Stage of a Thunderstorm<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-9.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>The <strong>Mature Stage<\/strong> is the most violent stage and generally lasts <strong>20\u201340 minutes<\/strong>.<\/li>\n<li>Precipitation reaches the ground during this phase.<\/li>\n<li>Both strong updrafts and down-drafts are present until the entrained air becomes relatively dry.<\/li>\n<li><strong>Roll clouds<\/strong> and <strong>Shelf clouds<\/strong> are commonly observed during this stage.<\/li>\n<\/ul>\n<h3>Dissipating Stage of a Thunderstorm<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-10.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>The <strong>Dissipating Stage<\/strong> is the final phase of a thunderstorm.<\/li>\n<li>Only down-drafts remain, preventing any further cloud development.<\/li>\n<li>Weak down-drafts continue at low and middle levels.<\/li>\n<li>The cloud develops a characteristic <strong>anvil top<\/strong> with <strong>false cirrus<\/strong>.<\/li>\n<li>Light rain may continue during this stage.<\/li>\n<\/ul>\n<h3>Secondary Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-11.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Secondary thunderstorms develop when cold down-drafts create squalls and gust fronts accompanied by heavy showers.<\/li>\n<li>The cold gust front undercuts warm air, forcing it upward.<\/li>\n<li>The rising moist air develops additional Cumulonimbus cells.<\/li>\n<li>Down-drafts from the parent storm interact with low-level winds, creating convergence that produces daughter cells.<\/li>\n<li>This repeated process results in <strong>multicell thunderstorms<\/strong>.<\/li>\n<\/ul>\n<h3>Movement of Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-12.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Thunderstorms generally move with the prevailing winds at approximately the midpoint of the cloud&#8217;s vertical extent.<\/li>\n<li>The direction and speed of movement are mainly controlled by winds near <strong>10,000 feet<\/strong> or between the <strong>700 hPa and 500 hPa<\/strong> pressure levels.<\/li>\n<\/ul>\n<h3>Supercell Thunderstorms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-13.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>In ordinary thunderstorms, down-drafts during the mature stage suppress further upward growth.<\/li>\n<li>Supercell thunderstorms develop under conditions of extreme instability, abundant moisture and strong vertical wind shear.<\/li>\n<li>Typically, the atmosphere is relatively stable near the surface but highly unstable at higher levels.<\/li>\n<\/ul>\n<h3>Supercell Development<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-14.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Supercells initially develop under slight instability, which increases with continued surface heating.<\/li>\n<li>Vertical wind shear results from winds blowing from different directions and at different speeds with height.<\/li>\n<li>Wind shear tilts the thunderstorm, separating the updrafts from the down-drafts.<\/li>\n<li>This separation allows the storm to continue growing into a long-lived supercell.<\/li>\n<\/ul>\n<h3>Thunderstorm Reporting<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-15.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li><strong>Light Thunderstorm:<\/strong> Characterised by faint thunder.<\/li>\n<li><strong>Moderate Thunderstorm:<\/strong> Loud thunder, lightning, showers and winds between <strong>15\u201340 knots<\/strong>.<\/li>\n<li><strong>Severe Thunderstorm:<\/strong> Continuous thunder and lightning, heavy showers and winds exceeding <strong>40 knots<\/strong>.<\/li>\n<li>Over plains, thunderstorms usually occur during the afternoon.<\/li>\n<li>Over valleys, thunderstorms are more common at night and during the early morning.<\/li>\n<li>Over the sea, thunderstorms are generally more frequent during the night.<\/li>\n<li>In mid-latitudes, thunderstorms are most common during summer, whereas in the tropics they are often associated with winter cold fronts.<\/li>\n<li>The first gust associated with a thunderstorm usually produces a sudden increase in atmospheric pressure.<\/li>\n<li>Thunderstorms are forecast by comparing existing atmospheric conditions with those required for development and by monitoring weather radar and satellite imagery.<\/li>\n<li>Aircraft should avoid thunderstorms by a wide margin, especially at lower altitudes.<\/li>\n<li>Jet streams create upper-level wind shear that tilts the updrafts and supports the development of supercell thunderstorms.<\/li>\n<\/ul>\n<h3>Dust and Sand Storms<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m18-thunderstorm-16.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Dust and sand storms develop over desert regions under conditions of high temperature, low humidity and atmospheric instability.<\/li>\n<li>Slight moisture intrusion may produce Cumulonimbus clouds that generate strong winds, lifting dust to heights of about <strong>10,000 feet<\/strong> and reducing visibility to as little as <strong>50 metres<\/strong>.<\/li>\n<li>During the pre-monsoon season, these storms resemble thunderstorms with relatively low cloud tops and precipitation that evaporates before reaching the ground.<\/li>\n<li><strong>Norwesters<\/strong> approach from the northwest over Bengal and are associated with violent thunderstorms and squall lines.<\/li>\n<li><strong>Tornadoes<\/strong> are rotating funnel clouds formed by intense convergence and low-level wind shear.<\/li>\n<li><strong>Waterspouts<\/strong> are tornadoes that develop over water and may lift spray, water and debris.<\/li>\n<li><strong>Dust Devils<\/strong> are small rotating columns of air formed by localized surface heating, capable of lifting dust to heights of about <strong>2 km<\/strong> and reaching diameters of up to <strong>10 km<\/strong>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Thunderstorm Types of Thunderstorms A thunderstorm (TS) is caused by intense convective currents within Cumulonimbus (Cb) clouds and is officially reported when thunder is heard. The diameter of a Cumulonimbus cloud can be as much as 10 km. Single-cell thunderstorms usually occur during the non-winter months due to intense surface heating (air-mass thunderstorms). Multi-cell cluster thunderstorms are commonly associated with mountains, cold fronts and low-pressure systems. Multi-cell line thunderstorms develop along squall lines associated with frontal systems. Supercell thunderstorms may extend into the stratosphere and are capable of producing tornadoes.&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"disable_featured_image":false,"footnotes":""},"categories":[358],"tags":[],"class_list":["post-15846","post","type-post","status-publish","format-standard","hentry","category-aviation-meteorology"],"_links":{"self":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/comments?post=15846"}],"version-history":[{"count":1,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15846\/revisions"}],"predecessor-version":[{"id":16691,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15846\/revisions\/16691"}],"wp:attachment":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/media?parent=15846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/categories?post=15846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/tags?post=15846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}