BRETAGNE

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Une accalmie avant une autre tempête. La vigilance orange "fortes-précipitations" est maintenue pour les Côtes-d'Armor, le Finistère et le Morbihan.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Elle est levée pour les six autres départements : Charente-Maritime, Gironde, Landes, Loire-Atlantique, Pyrénées-Atlantiques et Vendée. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Plus de risque de submersion :

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Par ailleurs, la vigilance "vagues-submersion" est entièrement levée par Météo-France. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Toutefois, un épisode pluvieux notable arrivant sur des sols déjà saturés et nécessitant une vigilance accrue est attendu. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Une nouvelle dépression au nord-ouest de la Corogne en fin de nuit va remonter vers le sud-ouest-Bretagne au cours de la journée de jeudi, puis se décaler en Manche. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Associée à cette dépression, une zone pluvieuse atteindra en fin de nuit prochaine la façade atlantique. Au cours de leur progression vers le nord-est en matinée, les pluies vont s'intensifier, plus particulièrement sur les départements de l'ouest-Bretagne. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Toujours du vent :

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Les pluies s'évacueront de la Bretagne en seconde partie de nuit de jeudi à vendredi. Sur l'épisode, on attend des précipiations comprises entre 20 et 40 mm, localement 50 à 60 mm sur les versants exposés du relief. Le sud-est du Morbihan devrait rester en deçà de ces seuils (15 mm attendus). 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            En liaison avec ces pluies, le vent de sud-est à sud se renforce avec des rafales de 80 à 100 km/h dans les terres, 90 à 110 km/h sur les côtes. A l'arrivée de la dépression en soirée, puis son passage au cours de la nuit, le vent de sud à sud-ouest puis ouest à ouest-nord-ouest va se renforcer sensiblement. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Un passage en vigilance orange vent est probable vers 6 heures jeudi matin avec extension à d'autres départements.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          (source : Ouest-France)