{"id":1257,"date":"2013-06-13T13:40:51","date_gmt":"2013-06-13T13:40:51","guid":{"rendered":"http:\/\/ialert.com\/blog\/?p=1257"},"modified":"2014-09-20T20:29:54","modified_gmt":"2014-09-20T20:29:54","slug":"what-is-a-derecho","status":"publish","type":"post","link":"https:\/\/ialert.com\/blog\/weather-articles\/what-is-a-derecho\/","title":{"rendered":"What is a Derecho?"},"content":{"rendered":"<p>A <em><strong>Derecho<\/strong><\/em> (deh REY cho), or sometimes called a &#8220;Bow Echo&#8221; due to the bent curve of the radar signature, is a wide spread, long-lived, line or cluster of strong thunderstorms, that rapidly moves east or southeast, and produces a large damaging wind field over the length of the storm.<\/p>\n<p>The June 29, 2012 Radar Imagery Composite Summary below nicely shows an actual derecho that started near Chicago and eventually pushed into Washington DC over 12 hours time.\u00a0 Looking at this radar summary you will notice the largest width of the storm is over 240 miles, duration length of storm in the image nearly 450 miles (full path extended 700 miles into DC), and of course the signature &#8220;bow echo&#8221; or reverse &#8220;C&#8221; signature of a Derecho.<\/p>\n<p><a href=\"http:\/\/ialert.com\/blog\/wp-content\/uploads\/2013\/06\/derecho_evolution.jpg\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1259 aligncenter\" title=\"Radar Derecho Evolution of June 29, 2012 Midwest\/Ohio Valley\" src=\"http:\/\/ialert.com\/blog\/wp-content\/uploads\/2013\/06\/derecho_evolution.jpg\" alt=\"\" width=\"960\" height=\"720\" \/ rel=\"nofollow\" srcset=\"https:\/\/ialert.com\/blog\/wp-content\/uploads\/2013\/06\/derecho_evolution.jpg 960w, https:\/\/ialert.com\/blog\/wp-content\/uploads\/2013\/06\/derecho_evolution-300x225.jpg 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n<p><strong>Specific Criteria for a Derecho:<\/strong><\/p>\n<ul>\n<li>Fast moving, long-lived wind storm<\/li>\n<li>Violent thunderstorms coupled together<\/li>\n<li>Wind gust &gt; 58 mph<\/li>\n<li>Wind damage extends &gt; 240 miles<\/li>\n<\/ul>\n<p>Finally, it is worth mentioning that there is not a &#8220;Derecho&#8221; watch, warning, advisory alert for this specific severe weather event.\u00a0 Instead Derecho warnings are embedded in <a title=\"Criteria for a severe thunderstorm warning\" href=\"http:\/\/ialert.com\/blog\/weather-articles\/criteria-for-a-severe-thunderstorm-warning\/\" rel=\"nofollow\">Severe Thunderstorm Warnings<\/a>.\u00a0 So in your <a title=\"ialert.com membership\" href=\"http:\/\/iAlert.com\/signup.php\" rel=\"nofollow\">iAlert.com member account<\/a> if you have selected to receive &#8220;Severe Weather&#8221; alerts by email or text message you will be notified of an approaching Derecho. To learn more about the different alert types offered by iAlert.com <a title=\"Different alert types by email or text supported by iAlert.com\" href=\"http:\/\/ialert.com\/blog\/ialert-faq\/what-type-of-alerts-can-i-receive-with-ialertcom\/\" rel=\"nofollow\">click here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Derecho (deh REY cho), or sometimes called a &#8220;Bow Echo&#8221; due to the bent curve of the radar signature, is a wide spread, long-lived, line or cluster of strong thunderstorms, that rapidly moves east or southeast, and produces a large damaging wind &hellip;<span class=\"more\"> <a href=\"https:\/\/ialert.com\/blog\/weather-articles\/what-is-a-derecho\/\">Read More&#8230;<\/a><\/span><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[189,13],"tags":[316,312,314,313,315],"class_list":["post-1257","post","type-post","status-publish","format-standard","hentry","category-basic-meteorology","category-weather-articles","tag-bow-echo","tag-derecho","tag-severe-storm","tag-severe-thunderstorm","tag-wind-storm"],"acf":[],"_links":{"self":[{"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/posts\/1257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/comments?post=1257"}],"version-history":[{"count":18,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/posts\/1257\/revisions"}],"predecessor-version":[{"id":1275,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/posts\/1257\/revisions\/1275"}],"wp:attachment":[{"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/media?parent=1257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/categories?post=1257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ialert.com\/blog\/wp-json\/wp\/v2\/tags?post=1257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}