{"id":230,"date":"2008-08-07T11:03:06","date_gmt":"2008-08-07T09:03:06","guid":{"rendered":"http:\/\/vandiepenbeeck.org\/?p=230"},"modified":"2008-08-07T11:03:06","modified_gmt":"2008-08-07T09:03:06","slug":"tornades-et-medias","status":"publish","type":"post","link":"http:\/\/vandiepenbeeck.org\/?p=230","title":{"rendered":"Tornades et m\u00e9dias"},"content":{"rendered":"

\"556af7cb44b5f56e2d6e43379a7c2e54.png\"<\/a>Dans la nuit de dimanche \u00e0 lundi une tornade a s\u00e9vi entre Haumont et Assevent en passant par Maubeuge dans le nord de la France (d\u00e9partement du Nord). Les m\u00e9dias continuent \u00e0 appeler ce ph\u00e9nom\u00e8ne mini-tornade. Ce terme qui a fait son apparition il y a une vingtaine d\u2019ann\u00e9e n\u2019a aucune signification et n\u2019a pas sa place dans les dictionnaires.
De plus ce terme a \u00e9t\u00e9 utilis\u00e9 pour la tornade d\u2019Haumont. Lorsque j\u2019ai vu les premi\u00e8res images, j\u2019ai pens\u00e9 que c\u2019\u00e9tait une F3 si pas une F4. Ces termes qualifient l\u2019intensit\u00e9 des tornades dans une \u00e9chelle \u00e9tablie par Fujita (voir tableau).<\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
\u00c9chelle<\/span><\/b> <\/p>\n

 <\/span><\/b><\/p>\n<\/td>\n

Vitesse du vent (km\/h)<\/span><\/b> <\/p>\n

 <\/span><\/b><\/p>\n<\/td>\n

Dommages<\/span><\/b> <\/p>\n

 <\/span><\/b><\/p>\n<\/td>\n

Remarques<\/span><\/b> <\/p>\n

 <\/span><\/b><\/p>\n<\/td>\n<\/tr>\n

F0<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

 <\/span>Inf\u00e9rieure \u00e0 115<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

L\u00e9ger<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Branches cass\u00e9es ou chemin\u00e9es l\u00e9g\u00e8rement endommag\u00e9es<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n

F1<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

116-179<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Moyen<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Tuiles arrach\u00e9es, voitures l\u00e9g\u00e8rement d\u00e9plac\u00e9es<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n

F2<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

180-251<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Fort<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Toitures arrach\u00e9es, arbres cass\u00e9s ou d\u00e9capit\u00e9s, d\u00e9placements d\u2019objets l\u00e9gers<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n

F3<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

252-330<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

S\u00e9v\u00e8re<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Maison partiellement d\u00e9truite, mur partiellement d\u00e9truits, d\u00e9raillement de trains, d\u00e9placement de v\u00e9hicules.<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n

F4<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

331-416<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Tr\u00e8s s\u00e9v\u00e8re<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Maisons d\u00e9truites, arbres cass\u00e9es, objets lourds d\u00e9plac\u00e9s sur de grandes distances<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n

F5<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Sup\u00e9rieure \u00e0 417<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Destruction totale<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n

Destruction totale des maisons, objets devenant des projectiles perforants.<\/span> <\/p>\n

 <\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Comme on le voit sur ce clich\u00e9 pris par un coll\u00e8gue, les voitures ont m\u00eame \u00e9t\u00e9 soulev\u00e9es ; selon les t\u00e9moignages, une autre a \u00e9t\u00e9 d\u00e9plac\u00e9e sur plus de 500 m. Localement, les destructions correspondent \u00e0 une tornade de force 4 sur l\u2019\u00e9chelle de Fujita.<\/font><\/span> <\/p>\n

 <\/font><\/span><\/p>\n

Malheureusement elle a fait des victimes dont 4 morts. On ne peut vraiment pas utiliser le terme mini-tornade<\/i>, terme qui devrait \u00eatre proscrit du vocabulaire.<\/span><\/p>\n

 \"9911d727899adfba40d2f6dc7c79b108.png\"<\/p>\n

Photo Karel Holvoet, source : Analyse de la tornade \u00e0 Haumont \u2013 Maubeuge, 3 ao\u00fbt 2008 (Karim HAMID, IRM).<\/p>\n","protected":false},"excerpt":{"rendered":"

Dans la nuit de dimanche \u00e0 lundi une tornade a s\u00e9vi entre Haumont et Assevent en passant par Maubeuge dans le nord de la France (d\u00e9partement du Nord). Les m\u00e9dias continuent \u00e0 appeler ce ph\u00e9nom\u00e8ne mini-tornade. Ce terme qui a fait son apparition il y a une vingtaine d\u2019ann\u00e9e n\u2019a aucune signification et n\u2019a pas […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-230","post","type-post","status-publish","format-standard","hentry","category-meteo"],"_links":{"self":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts\/230"}],"collection":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=230"}],"version-history":[{"count":0,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts\/230\/revisions"}],"wp:attachment":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}