{"id":32260,"date":"2012-10-27T20:56:10","date_gmt":"2012-10-27T18:56:10","guid":{"rendered":"http:\/\/staging.sillon38.com\/?p=32260"},"modified":"2012-10-27T20:56:10","modified_gmt":"2012-10-27T18:56:10","slug":"neige-et-vents-lisere-lardeche-et-la-drome-en-vigilance-orange","status":"publish","type":"post","link":"https:\/\/www.sillon38.com\/blog\/2012\/10\/27\/neige-et-vents-lisere-lardeche-et-la-drome-en-vigilance-orange\/","title":{"rendered":"Neige et vents: l’Is\u00e8re, l’Ard\u00e8che et la Dr\u00f4me en vigilance orange"},"content":{"rendered":"

C’est un ph\u00e9nom\u00e8ne rare en cette p\u00e9riode : l’Is\u00e8re est en vigilance orange pour risque de chutes de neige. Ceci de ce samedi 27 octobre jusqu’au dimanche 28 octobre 16 heures.<\/strong><\/p>\n

Le bulletin alerte m\u00e9t\u00e9o concerne \u00e9galement d’autres d\u00e9partements:<\/strong><\/p>\n

\"\"<\/strong>
\nQualification du ph\u00e9nom\u00e8ne :<\/strong>
\nGenre de temp\u00eate qui se produit en moyenne 3 fois tous les 10 ans
\nNeige : Episode hivernal non exceptionnel pour la r\u00e9gion concern\u00e9e (Is\u00e8re), mais suffisamment notable pour rendre les conditions de circulation difficiles (d’autant plus que c’est le premier \u00e9pisode de l’ann\u00e9e).<\/strong><\/span><\/p>\n

Situation:<\/strong>
\nLe mistral souffle mod\u00e9r\u00e9ment dans son domaine (80 km\/h \u00e0 Avignon)
\nDe petites averses donnent d\u00e9j\u00e0 quelques flocons au-dessus de 800\/900 m.<\/p>\n

\n

Evolution pr\u00e9vue :<\/strong>
\nOrange neige en Is\u00e8re :<\/span><\/strong>
\nLes pr\u00e9cipitations qui se produisent sur les Alpes vont devenir plus cons\u00e9quentes en premi\u00e8re partie de nuit et se produire essentiellement sous forme de neige \u00e0 partir de 400 m en d\u00e9but de nuit, jusqu’en plaine en fin de nuit. Ces pr\u00e9cipitations sont d’intensit\u00e9 plut\u00f4t faibles, mais elles sont continues dans le temps et donneront donc des quantit\u00e9s significatives.
\nOn attend ainsi en moyenne : 5 cm vers 500 m d’altitude, de 10 \u00e0 15 cm entre 800 et 1000 m, 20 \u00e0 30 cm au-del\u00e0 de 1500 m. (En-dessous de 300 m, les sols devraient \u00e0 peine blanchir).
\nLocalement, sur certains versants expos\u00e9s au vent de Nord, les quantit\u00e9s seront l\u00e9g\u00e8rement sup\u00e9rieures (Sur le Vercors par exemple) et des ph\u00e9nom\u00e8nes de cong\u00e8res se produiront sous l’impulsion du fort vent de Nord.
\nL’arr\u00eat progressif des pr\u00e9cipitations d\u00e9bute en soir\u00e9e de dimanche.<\/p><\/blockquote>\n

Orange vent :<\/strong><\/span>
\nSur Ard\u00e8che Dr\u00f4me :<\/strong> Le vent de Nord se renforce et un \u00e9pisode de violent mistral se met en place. En d\u00e9but de nuit, les rafales d\u00e9passeront 100 km\/h sur les hauteurs c\u00e9venoles et le Diois, puis atteindront 110 \u00e0 120 km\/h en fin de nuit.<\/p>\n

A ce moment dans la vall\u00e9e du Rh\u00f4ne, elles seront de l’ordre de 90 \u00e0 110 km\/h.
\nEn cours de matin\u00e9e, le vent atteint son paroxysme avec 120 \u00e0 130 km\/h sur les hauteurs, 100 \u00e0 120 km\/h dans la vall\u00e9e au Sud de Valence. Le vent commence \u00e0 faiblir en milieu d’apr\u00e8s-midi, les rafales d\u00e9passant 100 km\/h se concentrent en soir\u00e9e sur les hauteurs.
\nA noter que sur les d\u00e9partements limitrophes, le vent est \u00e9galement fort, avec des rafales de l’ordre de 70 \u00e0 80 km\/h.
\n
\nSur le Vaucluse :<\/strong>
\nL’\u00e9pisode de vent fort d\u00e9butera en cours de matin\u00e9e. Les plus fortes rafales concerneront essentiellement l’ouest du d\u00e9partement avec des rafales entre 110 et 130 km\/h. Le vent devrait commencer \u00e0 faiblir en fin de journ\u00e9e.<\/p>\n

Sur les Bouches-du-Rh\u00f4ne :<\/strong>
\nL’\u00e9pisode de vent fort d\u00e9butera en fin de nuit de samedi \u00e0 dimanche. Les plus fortes rafales concerneront essentiellement une bande allant de la vall\u00e9e du Rh\u00f4ne au littoral \u00e0 l’est de Marseille en passant par l’Etang de Berre. Les rafales pourront atteindre 110 \u00e0 130 km\/h.<\/p>\n

Sur le Var :
\nL’\u00e9pisode de vent fort concernera essentiellement le littoral du Var \u00e0 l’ouest des \u00eeles d’Hy\u00e8res, depuis la fin de nuit de samedi \u00e0 dimanche jusqu’\u00e0 la mi-journ\u00e9e de dimanche. Les rafales seront comprises sur cette zone littorale entre 110 et 130 km\/h. Le vent faiblira ensuite en cours d’apr\u00e8s-midi.<\/p>\n","protected":false},"excerpt":{"rendered":"

C’est un ph\u00e9nom\u00e8ne rare en cette p\u00e9riode : l’Is\u00e8re est en vigilance orange pour risque de chutes de neige.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[351,498,1895,2994],"class_list":["post-32260","post","type-post","status-publish","format-standard","hentry","category-nature","tag-alerte-meteo","tag-ardeche","tag-drome","tag-isere"],"yoast_head":"\nNeige et vents: l'Is\u00e8re, l'Ard\u00e8che et la Dr\u00f4me en vigilance orange -<\/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:\/\/www.sillon38.com\/blog\/2012\/10\/27\/neige-et-vents-lisere-lardeche-et-la-drome-en-vigilance-orange\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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