{"id":15866,"date":"2026-06-13T05:35:17","date_gmt":"2026-06-13T00:05:17","guid":{"rendered":"https:\/\/ibexaviation.com\/pilot-training\/?p=15866"},"modified":"2026-07-26T10:57:35","modified_gmt":"2026-07-26T05:27:35","slug":"sigmet-airmet-gamet","status":"publish","type":"post","link":"https:\/\/ibexaviation.com\/pilot-training\/sigmet-airmet-gamet\/","title":{"rendered":"Sigmet Airmet Gamet"},"content":{"rendered":"<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-1.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<h3>Significant Met Information<\/h3>\n<h3>SIGMET, AIRMET and GAMET<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-2.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li><strong>SIGMET<\/strong> (Significant Meteorological Information) contains weather information significant to the safety of aircraft in flight.<\/li>\n<li>In India, SIGMET is issued by the <strong>Meteorological Watch Office (MWO)<\/strong> and transmitted to aircraft through the <strong>Flight Information Centre (FIC)<\/strong> or <strong>Area Control Centre (ACC)<\/strong> at Delhi, Mumbai, Kolkata and Chennai.<\/li>\n<li>SIGMET is issued every <strong>3 hours<\/strong> starting from <strong>0100 UTC<\/strong> and is valid for a maximum of <strong>4 hours<\/strong>.<\/li>\n<li>For <strong>Volcanic Ash<\/strong> and <strong>Tropical Cyclones<\/strong>, validity may extend up to <strong>12 hours<\/strong>, with updates issued every <strong>6 hours<\/strong>.<\/li>\n<li><strong>SIGMET SST<\/strong> is a SIGMET issued specifically for supersonic flights.<\/li>\n<li><strong>AIRMET<\/strong> is a SIGMET intended for low-level flights.<\/li>\n<li><strong>GAMET<\/strong> is an area forecast issued for low-level flights and exchanged between neighbouring Flight Information Regions (FIRs).<\/li>\n<\/ul>\n<h3>Conditions for Significant Meteorological Information (SIGMET)<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-3.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>SIGMET is issued for the following significant weather phenomena:<\/li>\n<ul>\n<li>Thunderstorms:\n<ul>\n<li>OBSC TS \u2013 Obscured Thunderstorm<\/li>\n<li>FRQ TS \u2013 Frequent Thunderstorms<\/li>\n<li>EMBD TS \u2013 Embedded Thunderstorms<\/li>\n<li>SQL TS \u2013 Squall Line Thunderstorms<\/li>\n<li>TSGR \u2013 Thunderstorms with Hail<\/li>\n<\/ul>\n<\/li>\n<li>Tropical Cyclones with sustained winds greater than <strong>34 knots<\/strong> for at least <strong>10 minutes<\/strong>.<\/li>\n<li>Severe turbulence caused by strong winds or rotor clouds.<\/li>\n<li>Severe icing outside convective clouds or due to freezing rain.<\/li>\n<li>Severe mountain waves with updrafts exceeding <strong>3 m\/s<\/strong> accompanied by severe turbulence.<\/li>\n<li>Heavy dust storms or sandstorms.<\/li>\n<li>Volcanic ash.<\/li>\n<li>Radioactive cloud.<\/li>\n<\/ul>\n<\/ul>\n<h3>SIGMET Format<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-4.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>ICAO indicator of the FIR, report type and sequence number (e.g., <strong>VABB SIGMET 5<\/strong>).<\/li>\n<li>Date, time and validity period in UTC (e.g., <strong>VALID 271215\/271600<\/strong>).<\/li>\n<li>Location of the issuing Meteorological Watch Office (MWO).<\/li>\n<li>Name of the Flight Information Region (FIR) or Control Area.<\/li>\n<li>Weather phenomenon responsible for the SIGMET (e.g., <strong>SEV TURB<\/strong>).<\/li>\n<li>Whether the phenomenon is <strong>Observed (OBS)<\/strong> or <strong>Forecast (FCST)<\/strong>, together with the observation or forecast time.<\/li>\n<\/ul>\n<h3>SIGMET Position and Movement<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-5.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Location and altitude are reported using geographical features, latitude\/longitude, or location indicators followed by flight level (e.g., <strong>VAPO FL250<\/strong>).<\/li>\n<li>Movement is described using cardinal directions and speed in knots or km\/h, followed by intensity trend.<\/li>\n<li>Example: <strong>MOV SE 40KT WKN<\/strong> (Moving southeast at 40 knots and weakening).<\/li>\n<li>Volcanic ash and tropical cyclone SIGMETs include an outlook showing the expected future position beyond the validity period.<\/li>\n<\/ul>\n<h3>SIGMET Decode<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-6.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Originating Meteorological Watch Office (MWO).<\/li>\n<li>Message identification.<\/li>\n<li>Sequence number.<\/li>\n<li>Validity date and time.<\/li>\n<li>Intensity and weather phenomenon.<\/li>\n<li>Observed or forecast time.<\/li>\n<li>Location.<\/li>\n<li>Movement or expected movement.<\/li>\n<li>Forecast change in intensity.<\/li>\n<li>Outlook beyond the validity period.<\/li>\n<\/ul>\n<h3>Example SIGMET<\/h3>\n<pre><code>VOMM\nSIGMET 5\nVALID 101200\/101600\nSEV TC\nOBS AT 1130 UTC\n20.2N 89.2E\n25 NM NE OF CHENNAI\nMOV W 25KT\nINTSF\nOTLK TC CENTRE\n230300 21N 87E\n231200 21N 86E\n<\/code><\/pre>\n<h3>AIRMET Format<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-7.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Date, time and validity period in UTC (e.g., <strong>VALID FEB 27\/1215Z 27\/1600Z<\/strong>).<\/li>\n<li>Meteorological situation causing issuance, written in abbreviated plain language together with movement.<\/li>\n<li>Example: <strong>MET SITUATION AT 1500Z, LOW PRESSURE NEAR MUMBAI COAST<\/strong>.<\/li>\n<li>Wind warning for gusts exceeding <strong>20 knots<\/strong>.<\/li>\n<li>Forecast wind and temperature.<\/li>\n<li>Forecast freezing level.<\/li>\n<li>Weather forecast divided into geographical zones.<\/li>\n<li>Each zone includes:\n<ul>\n<li>Visibility.<\/li>\n<li>Weather.<\/li>\n<li>Cloud base and cloud tops.<\/li>\n<\/ul>\n<\/li>\n<li>Aviation warnings such as:\n<ul>\n<li>Cloud on hills.<\/li>\n<li>Icing.<\/li>\n<li>Turbulence.<\/li>\n<li>Mountain waves.<\/li>\n<\/ul>\n<\/li>\n<li>Outlook forecast valid for the following <strong>6 hours<\/strong>.<\/li>\n<\/ul>\n<h3>AIRMET Decode<\/h3>\n<p>  <img decoding=\"async\" src=\"https:\/\/ibexaviation.com\/page-show\/aviation-meteorology\/m28-sigmet-airmet-gamet-8.jpg\" alt=\"\" loading=\"lazy\"\/><\/p>\n<ul>\n<li>Identifier.<\/li>\n<li>Validity date and time.<\/li>\n<li>Meteorological situation.<\/li>\n<li>Wind warning.<\/li>\n<li>Forecast wind and temperature.<\/li>\n<li>Freezing level.<\/li>\n<li>Forecast zone.<\/li>\n<li>Visibility.<\/li>\n<li>Weather.<\/li>\n<li>Cloud base and cloud top.<\/li>\n<li>Weather warning.<\/li>\n<li>Outlook forecast.<\/li>\n<\/ul>\n<h3>Example AIRMET<\/h3>\n<pre><code>AIRMET\nVALID FEB 27\/1215Z 27\/1600Z\nMET SITUATION AT 1500Z, LOW PRESSURE NEAR MUMBAI COAST\nSTRONG WIND WRG: GUSTS AROUND 40KT\n1000FT 330\/20KT BECMG 280\/40KT PS05\nFREEZING LEVEL 3000FT\nZONE 1: SOUTH OF MUMBAI\nOCNL 7KM IN RA\n6\/8 CU\/AC\n2000FT\/14000FT\nWRNG MOD ICE AND MOD TURB IN CLD\nOUTLOOK UNTIL FEB 19\/0100Z\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Significant Met Information SIGMET, AIRMET and GAMET SIGMET (Significant Meteorological Information) contains weather information significant to the safety of aircraft in flight. In India, SIGMET is issued by the Meteorological Watch Office (MWO) and transmitted to aircraft through the Flight Information Centre (FIC) or Area Control Centre (ACC) at Delhi, Mumbai, Kolkata and Chennai. SIGMET is issued every 3 hours starting from 0100 UTC and is valid for a maximum of 4 hours. For Volcanic Ash and Tropical Cyclones, validity may extend up to 12 hours, with updates issued every&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-15866","post","type-post","status-publish","format-standard","hentry","category-aviation-meteorology"],"_links":{"self":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15866","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=15866"}],"version-history":[{"count":1,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15866\/revisions"}],"predecessor-version":[{"id":16702,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/posts\/15866\/revisions\/16702"}],"wp:attachment":[{"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/media?parent=15866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/categories?post=15866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibexaviation.com\/pilot-training\/wp-json\/wp\/v2\/tags?post=15866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}