{"id":7491,"date":"2026-04-20T20:10:40","date_gmt":"2026-04-20T18:10:40","guid":{"rendered":"https:\/\/meteo-sain-bel.fr\/wp\/blog\/le-20-avril-2026-a-18h10-chaleur-saharienne-et-froid-polaire-la-france-sous-tension-entre-deux-extremes\/"},"modified":"2026-04-20T20:10:40","modified_gmt":"2026-04-20T18:10:40","slug":"le-20-avril-2026-a-18h10-chaleur-saharienne-et-froid-polaire-la-france-sous-tension-entre-deux-extremes","status":"publish","type":"post","link":"https:\/\/meteo-sain-bel.fr\/wp\/blog\/le-20-avril-2026-a-18h10-chaleur-saharienne-et-froid-polaire-la-france-sous-tension-entre-deux-extremes\/","title":{"rendered":"le 20 avril 2026 \u00e0 18h10  Chaleur saharienne et froid polaire : la France sous tension entre deux extr\u00eames"},"content":{"rendered":"<p>M\u00e9t\u00e9o\u00a0 Republi\u00e9 via Innoreader <a href=\"https:\/\/www.meteo-paris.com\/actualites\/chaleur-saharienne-et-froid-polaire-la-france-sous-tension-entre-deux-extremes\" target=\"_blank\" class=\"feedzy-rss-link-icon\">Lire la Suite<\/a><\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.meteo-paris.com\/uploads\/actu\/conflit%20air%20polaire%20et%20air%20du%20sahara%20sur%20la%20France.png\" \/><\/p>\n<p><em><strong>La France se retrouvera au milieu d&#8217;un conflit de masses d&#8217;air cette semaine, entre air frais et sec au nord et air chaud au sud\u00a0<\/strong><\/em><\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<h2>Une baisse des temp\u00e9ratures sur la moiti\u00e9 nord<\/h2>\n<p>\u00a0<\/p>\n<p>Si la douceur a de nouveau regagn\u00e9 tout le pays la semaine derni\u00e8re, les temp\u00e9ratures repassant parfois nettement au-dessus des normales de saison, la fin de semaine a vu une nouvelle baisse des temp\u00e9ratures sur la France.<\/p>\n<p>Contrairement \u00e0 la derni\u00e8re, cette baisse du mercure fut n\u00e9anmoins plut\u00f4t cantonn\u00e9e \u00e0 la moiti\u00e9 nord de la France, de l&#8217;air sensiblement plus frais ayant d\u00e9bord\u00e9 sur le nord-ouest du pays samedi avant d&#8217;envahir tout le nord du pays ce dimanche, la douceur\/chaleur r\u00e9sistant encore plus au sud.<\/p>\n<p>En ce d\u00e9but de semaine, l&#8217;air plus frais persiste sur la moiti\u00e9 nord du pays sous l&#8217;influence d&#8217;un flux plus continental. De l&#8217;air plus frais venu d&#8217;Europe de l&#8217;est circule en effet sous un large anticyclone pr\u00e9sent sur l&#8217;Atlantique nord, se dirigeant vers une zone d\u00e9pressionnaire s&#8217;isolant pr\u00e8s des A\u00e7ores, tandis que de l&#8217;air plus doux et m\u00eame encore chaud persiste sur le sud de la France.<\/p>\n<p>\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.meteo-paris.com\/uploads\/actu\/situ%2021%20avril.png\" \/><\/p>\n<p><em><strong>Situation atmosph\u00e9rique sur l&#8217;Europe en ce d\u00e9but de semaine<\/strong><\/em> \u2013 Mod\u00e8le ECMWF via WX CHARTS<\/p>\n<p>\u00a0<\/p>\n<p>Ainsi, les temp\u00e9ratures restent tr\u00e8s contrast\u00e9es en ce d\u00e9but de semaine sur notre pays avec des valeurs situ\u00e9es sous les normales de la p\u00e9riode sur le nord et au contraire au-dessus des moyennes d&#8217;une derni\u00e8re d\u00e9cade d&#8217;avril sur une large moiti\u00e9 sud, le centre du pays se retrouvant au c\u0153ur de cette zone de conflit.<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<h2>Ce type de situation va-t-il persister\u00a0cette semaine\u00a0?<\/h2>\n<p>\u00a0<\/p>\n<p>Selon les derni\u00e8res mod\u00e9lisations, ce flux continental frais va persister dans les prochains jours, apportant ainsi des temp\u00e9ratures un peu justes pour la p\u00e9riode jusqu&#8217;en milieu de semaine sur la moiti\u00e9 nord de la France. N\u00e9anmoins, sous l&#8217;influence de la zone d\u00e9pressionnaire s&#8217;\u00e9tant isol\u00e9e du c\u00f4t\u00e9 des A\u00e7ores, la masse d&#8217;air va peu \u00e0 peu se radoucir sur le nord du pays en seconde partie de semaine avec des temp\u00e9ratures devenant de nouveau tr\u00e8s douces pour la p\u00e9riode.<\/p>\n<p>\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/images.meteociel.fr\/im\/57\/15822\/animbad6.gif\" \/><\/p>\n<p><em><strong>Animation des temp\u00e9ratures \u00e0 850 hPa sur l&#8217;Europe du 20 au 26 avril 2026<\/strong><\/em> \u2013 Mod\u00e8le ECMWF via meteociel<\/p>\n<p>\u00a0<\/p>\n<p>Ainsi, le ressenti va devenir de nouveau plus printanier au fil de la semaine sur le nord de la France, les temp\u00e9ratures finissant par repasser au-dessus des normales de la p\u00e9riode. Dans le m\u00eame temps, la chaleur pr\u00e9coce persistera sur la moiti\u00e9 sud, notamment en allant vers le sud-ouest o\u00f9 le ressenti s&#8217;annonce parfois tr\u00e8s estival.<\/p>\n<p>\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.meteo-paris.com\/uploads\/actu\/maxi%2021%2024%20avril.png\" \/><\/p>\n<p><em><strong>Temp\u00e9ratures maximales pr\u00e9vues sur la France du 21 au 24 avril 2026<\/strong><\/em> \u2013 M\u00e9t\u00e9o-Villes<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<h2>Une situation propice aux orages\u00a0?<\/h2>\n<p>\u00a0<\/p>\n<p>En temps normal, surtout en cette p\u00e9riode de l&#8217;ann\u00e9e, un conflit entre air doux\/chaud et air frais est synonyme de d\u00e9gradation orageuse. Pourtant, le risque orageux restera seulement cantonn\u00e9 au sud et surtout au sud-ouest de la France dans les prochains jours. Comment expliquer cela\u00a0?<\/p>\n<p>En g\u00e9n\u00e9ral, les d\u00e9gradations orageuses printani\u00e8res sont provoqu\u00e9es par l&#8217;arriv\u00e9e d&#8217;air oc\u00e9anique humide et frais en altitude sur de l&#8217;air doux\/chaud et plus sec. C&#8217;est ce type de situation qui engendre les fameuses d\u00e9gradations orageuses concernant principalement les r\u00e9gions du sud-ouest au nord-est du pays entre le printemps et l&#8217;\u00e9t\u00e9.<\/p>\n<p>Cette semaine, la situation sera diff\u00e9rente. En effet, le conflit de masse d&#8217;air actuel s&#8217;effectue entre de l&#8217;air continental sec et frais et de l&#8217;air doux\/chaud plus humide remontant du sud\/sud-est, ce qui diff\u00e8re donc de ce que nous rencontrons habituellement. Sous l\u2019influence de ce flux continental, la masse d&#8217;air sera trop s\u00e8che sur les \u00be de la France pour favoriser les d\u00e9veloppements orageux, sans parler des pressions qui resteront en plus anticycloniques sur une large moiti\u00e9 nord.<\/p>\n<p>Le sud-ouest du pays est cependant soumis \u00e0 un air plus humide remontant de M\u00e9diterran\u00e9e, en bordure d&#8217;air plus frais circulant sur le nord de la France, une situation bien plus favorable au d\u00e9veloppements orageux. C&#8217;est donc pour cela que ce conflit de masse d&#8217;air, m\u00eame s&#8217;il se montre notable, n&#8217;engendrera pas de d\u00e9gradations orageuses g\u00e9n\u00e9ralis\u00e9es et organis\u00e9es dans les prochains jours.<\/p>\n<p>\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.meteo-paris.com\/uploads\/actu\/situ%20semaine%20avril.png\" \/><\/p>\n<p><em><strong>Comparaison d&#8217;une situation favorable aux orages sur la France \u00e0 la situation actuelle<\/strong><\/em> &#8211; M\u00e9t\u00e9o-Villes<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<h3><strong>\u00c0 lire \u00e9galement :<\/strong><\/h3>\n<p>\u00a0<\/p>\n<p>&gt;&gt;&gt;\u00a0<a href=\"https:\/\/www.meteo-paris.com\/actualites\/la-fin-avril-peut-elle-etre-plus-froide-que-le-debut\">La fin avril peut-elle \u00eatre plus froide que le d\u00e9but ?<\/a><\/p>\n<p>&gt;&gt;&gt;\u00a0<a href=\"https:\/\/www.meteo-paris.com\/actualites\/temps-calme-mais-un-changement-brutal-arrive-t-il\">Temps calme\u2026 mais un changement brutal arrive-t-il ?<\/a><\/p>\n<p>&gt;&gt;&gt;<strong>\u00a0<\/strong><a href=\"https:\/\/www.meteo-paris.com\/actualites\/quand-il-neigeait-partout-en-france-en-avril\">De la neige est possible partout en France jusqu&#8217;\u00e0 la fin du mois d&#8217;avril !<\/a><\/p>\n<p>&gt;&gt;&gt;\u00a0<a href=\"https:\/\/www.meteo-paris.com\/actualites\/bilan-meteo-et-climatique-de-l-hiver-2025-2026-une-multititudes-d-intemperies-et-un-froid-tres-bref\">Bilan m\u00e9t\u00e9o d&#8217;un hiver 2025-2026 tr\u00e8s perturb\u00e9 avec un froid tr\u00e8s bref<\/a><\/p>\n<p>&gt;&gt;&gt; <a href=\"https:\/\/www.meteo-villes.com\/france\/previsions\">Notre bulletin m\u00e9t\u00e9o r\u00e9actualis\u00e9 quotidiennement<\/a><\/p>\n<p>&gt;&gt;&gt; <a href=\"https:\/\/x.com\/Meteovilles\">Notre compte Twitter tr\u00e8s suivi et r\u00e9f\u00e9rence dans tous les m\u00e9dias !<\/a><\/p>\n<p>\u00a0<\/p>\n<p>Auteur : <a href=\"https:\/\/x.com\/BergenTristan\">Tristan Bergen<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>M\u00e9t\u00e9o\u00a0 Republi\u00e9 via Innoreader Lire la Suite La France se retrouvera au milieu d&#8217;un conflit de masses d&#8217;air cette semaine, entre air frais et sec [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7492,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_uag_custom_page_level_css":"","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":"","ast-disable-related-posts":"","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-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[6],"tags":[],"class_list":["post-7491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-externes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>le 20 avril 2026 \u00e0 18h10 Chaleur saharienne et froid polaire : la France sous tension entre deux extr\u00eames - Meteo Sain-Bel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meteo-sain-bel.fr\/wp\/blog\/le-20-avril-2026-a-18h10-chaleur-saharienne-et-froid-polaire-la-france-sous-tension-entre-deux-extremes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" 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