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image/svg+xml Courant entrant arrière Descending rear inflow Descending rear inflow Flux ascendant Ascending Ascending de l'avant vers l'arrière front-to-rear flow front-to-rear flow Nuage Cloud base Cloud base Limite des échos radars Radar echo boundary Arcus Shelf cloud Shelf cloud Front de rafales Gust front Gust front Cellule mature Mature cell Mature cell Haute pression High pressure High pressure Vieille cellule Old cell Old cell Basse pression Low pressure Low pressure Déplacement Storm motion Storm motion Basse pression Low pressure Low pressure Sommet du nuage Cloud top Cloud top 0°C 0°C 0°C Pluie continue Stratiform rain Stratiform rain Précipitation Heavy convective Heavy convective torrentielle showers showers Nouvelle cellule New cell Ensemencement Seeding Seeding A H H D3 L3 L3 D4 L4 L4