{"id":3405,"date":"2026-01-30T08:43:03","date_gmt":"2026-01-30T13:43:03","guid":{"rendered":"https:\/\/glennspecht.com\/wp\/?p=3405"},"modified":"2026-01-30T08:43:05","modified_gmt":"2026-01-30T13:43:05","slug":"explainer-the-madden-julian-oscillation-mjo","status":"publish","type":"post","link":"https:\/\/glennspecht.com\/wp\/explainer-the-madden-julian-oscillation-mjo\/","title":{"rendered":"Explainer: The Madden-Julian Oscillation (MJO)"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p>If El Ni\u00f1o is the &#8220;marathon&#8221; of weather (lasting months or years), the <strong>Madden-Julian Oscillation (MJO)<\/strong> is the &#8220;sprint.&#8221; It is a massive, fast-moving pulse of clouds and rain that circles the globe every 30 to 60 days.<sup><\/sup><\/p>\n\n\n\n<p>For people in Ecuador, the MJO is often the &#8220;hidden hand&#8221; behind a sudden week of torrential rain or a strangely dry &#8220;break&#8221; in the middle of the rainy season.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. What is the MJO?<\/h3>\n\n\n\n<p>The MJO is an eastward-moving &#8220;wave&#8221; of atmospheric energy.<sup><\/sup> It consists of two parts:<sup><\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The Enhanced Phase (The Wet Pulse):<\/strong> A massive cluster of thunderstorms and low pressure. When this pulse passes over South America, it acts like a giant vacuum, pulling moisture in and dumping heavy rain.<\/li>\n\n\n\n<li><strong>The Suppressed Phase (The Dry Pulse):<\/strong> Following right behind the wet phase is a zone of high pressure and clear skies. This &#8220;brings the sun out&#8221; and can lead to unseasonably dry, hot weeks.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Why It Matters to Ecuador<\/h3>\n\n\n\n<p>While El Ni\u00f1o sets the &#8220;background&#8221; for the year, the MJO dictates the <strong>timing<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Intensifying El Ni\u00f1o:<\/strong> If the MJO\u2019s &#8220;wet phase&#8221; arrives while an El Ni\u00f1o is already happening, it can turn a normal rainy week into a catastrophic flood. In fact, a strong MJO pulse in March 2023 was a major trigger for the &#8220;Coastal El Ni\u00f1o&#8221; that hammered Ecuador and Peru.<\/li>\n\n\n\n<li><strong>Energy and Reservoirs:<\/strong> Ecuador\u2019s electricity depends on rain in the Highlands. If the MJO enters a &#8220;suppressed phase&#8221; over the Andes, it can lead to the reservoir drops and power cuts we\u2019ve seen in recent years.<\/li>\n\n\n\n<li><strong>Agriculture:<\/strong> Farmers watch for the MJO (often without knowing its name) to time their planting. The &#8220;wet pulse&#8221; provides the soaking rain seeds need to germinate.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Current Situation: January\/February 2026<\/h3>\n\n\n\n<p>As of <strong>late January 2026<\/strong>, the MJO is currently very active.<sup><\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Current Phase:<\/strong> The MJO pulse has recently amplified in the Western Pacific and is rapidly propagating toward the <strong>Western Hemisphere (Americas)<\/strong>.<\/li>\n\n\n\n<li><strong>What to Expect:<\/strong> Over the next 1\u20132 weeks (early February), this &#8220;wet pulse&#8221; is expected to center over South America. For the Ecuadorian coast and the Northern Sierra, this often means an <strong>increase in convective rainfall<\/strong> (afternoon thunderstorms) and cloudier skies.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. What to Look For<\/h3>\n\n\n\n<p>You don&#8217;t need a PhD in meteorology to spot the MJO\u2019s influence. Watch for these &#8220;MJO Markers&#8221;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The &#8220;Grey Week&#8221;:<\/strong> If the weather suddenly shifts from bright and sunny to 5\u20137 days of persistent humidity and afternoon deluges, you are likely in the <strong>Enhanced Phase<\/strong>.<\/li>\n\n\n\n<li><strong>The Wind Shift:<\/strong> Sailors and fishermen often notice the &#8220;Trade Winds&#8221; weakening or even reversing (blowing from the west) just as the rainy pulse arrives.<\/li>\n\n\n\n<li><strong>The 40-Day Echo:<\/strong> If you had a massive storm on January 1st, and then another one around February 10th, you are seeing the 40-day cycle of the MJO in action.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Summary \/ Resumen<\/h3>\n\n\n\n<p><strong>English:<\/strong> The Madden-Julian Oscillation (MJO) is a 30\u201360 day cycle of tropical weather that moves eastward around the world.<sup><\/sup> In its &#8220;wet phase,&#8221; it brings heavy rain and thunderstorms to Ecuador; in its &#8220;dry phase,&#8221; it brings clear skies.<sup><\/sup> As of late January 2026, a strong MJO pulse is moving toward the Americas, which will likely trigger more frequent rains across the Ecuadorian coast and Andes in the first half of February.<\/p>\n\n\n\n<p><strong>Espa\u00f1ol:<\/strong> La Oscilaci\u00f3n de Madden-Julian (MJO) es un ciclo clim\u00e1tico tropical de 30 a 60 d\u00edas que se desplaza hacia el este alrededor del mundo.<sup><\/sup> En su &#8220;fase h\u00fameda&#8221;, trae fuertes lluvias y tormentas a Ecuador; en su &#8220;fase seca&#8221;, trae cielos despejados. A finales de enero de 2026, un fuerte pulso de la MJO se desplaza hacia las Am\u00e9ricas, lo que probablemente activar\u00e1 lluvias m\u00e1s frecuentes en la costa y los Andes ecuatorianos durante la primera quincena de febrero.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Quick Links &amp; Fact Checks:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Track the Pulse:<\/strong> The<a href=\"https:\/\/www.cpc.ncep.noaa.gov\/products\/precip\/CWlink\/MJO\/mjo.shtml\" target=\"_blank\" rel=\"noreferrer noopener\">NOAA Climate Prediction Center<\/a>provides weekly &#8220;MJO Updates&#8221; with phase maps.<\/li>\n\n\n\n<li><strong>Local Impact:<\/strong><a href=\"https:\/\/twitter.com\/inamhi_ec\" target=\"_blank\" rel=\"noreferrer noopener\">INAMHI<\/a>often issues &#8220;Alertas Meteorol\u00f3gicas&#8221; when a wet MJO phase aligns with local moisture, signaling high flood risks.<\/li>\n\n\n\n<li><strong>Academic Context:<\/strong> Research from<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33456207\/\" target=\"_blank\" rel=\"noreferrer noopener\">Recalde-Coronel et al.<\/a>shows that the MJO can increase rainfall in Western Tropical South America by <strong>20\u201350%<\/strong> above normal.<\/li>\n<\/ul>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>If El Ni\u00f1o is the &#8220;marathon&#8221; of weather (lasting months or years), the Madden-Julian Oscillation (MJO) is the &#8220;sprint.&#8221; It [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ngg_post_thumbnail":0,"footnotes":""},"categories":[389,398,400],"tags":[351],"class_list":["post-3405","post","type-post","status-publish","format-standard","hentry","category-explainer","category-geography","category-living-in-ecuador","tag-ecuador-images"],"_links":{"self":[{"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/posts\/3405","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/comments?post=3405"}],"version-history":[{"count":1,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/posts\/3405\/revisions"}],"predecessor-version":[{"id":3406,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/posts\/3405\/revisions\/3406"}],"wp:attachment":[{"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/media?parent=3405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/categories?post=3405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/glennspecht.com\/wp\/wp-json\/wp\/v2\/tags?post=3405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}