Back to main menu  /  d1+09Z  d1+12Z  d1+15Z Help and usage   /  Use the clickable blipmaps on the right to get the name (mouse over) or the aerological profile (click on) of the place indicated by a black small star. Thermal parameters: BL top height / BL depth / BL topvariab / W* / B/S ratio / Convergence   /  Wind parameters  /  sfc parameters  /  clouds parameters Quick help: It is the height of the top of the mixing convective boundary layer (CBL or BL), which for thermal convection is the average top of a dry thermal. In the presence of clouds (which release additional buoyancy aloft, creating "cloudsuck") the updraft top will be above this forecast, but the maximum thermalling height will then be limited by the cloud base. See the "Cloud prediction parameters". Further, when the mixing results from shear turbulence rather than thermal mixing this parameter is not useful for glider flying. See B/S ratio parameter blipmap. Aide rapide: Carte de prvision de l'altitude du sommet de la couche convective (CC) soit le plafond moyen des thermiques sans cumulus. En prsence de gros cumulus qui augmentent pourtant la flottabilit des ascendances (effet de "succion" des cumulus) le plafond utilisable est bien sr limit par l'altitude de la base des nuages (voir les cartes concernant les nuages). Il faut tenir compte aussi de la qualit des thermiques (voir cartes des B/S ratio) pour pouvoir atteindre le plafond.