Weather4D Training with ACM Catamaran [2022]

After these last two years disrupted by the pandemic, I am starting my trainings all over again in partnership with ACM Catamaran.

In 2022 the Weather4D Routing & Navigation with iPad trainingsare renewed. I will manage these trainings during onboard weekend on one of the cruising school catamarans starting from the school base inHyères – Le Gapeau.

From 3 to 6 people in private cabins for these intensive training courses that have been a great success for almost ten years ! Catamarans offer you a great "classroom", the bay of Hyères a superb navigation basin "all weather", and ACM an "all inclusive" service, it's royal !

13 weekends are scheduled : next internship 30 April-1st may Read more …

Weather4D sur Mac M1

We have been talking about it since 2020 in the Facebook group of Weather4D users, and often in the support, Weather4D Routing & Navigation now works on Mac with M1 processors, with the system MacOS 11.x ("Big Sur" and following). All you need to do is connect the Mac to a GPS receiver or a NMEA gateway via Wi-Fi to receive the position and navigation data from the instruments.. Read more …

Alternative weather models

For several years, forecast files in GRIB format have been widely used in meteorological applications.. The majority of forecast models have been made freely available by the meteorological services, all countries included. Applications like XyGrib, LuckGrib, SailGrib, Weather4D and other, offer a selection of atmospheric and oceanic models, up to 25 weather models and 15 wave and current models for Weather4D, nearly fifty models with LuckGrib, for example. But there are always others that can usefully complement the standard offerings of these applications.. Read more …

Predict thunderstorms with Weather4D


In Weather4D (all versions) most weather models provide a data calledCAPE.

Convective Available Potential Energy, in French : Energie potentielle de convection disponible. Behind this abstruse acronym hides a powerful tool for forecasting thunderstorms. The CAPE is measured in joules per kilogram of air (J / Kg) and defines the vertical thrust energy of a hot air particle in a colder atmosphere. In other words, vertical acceleration of the air particle will be directly related to this energy measurement. Read more …

Weather4D and iOS Local Network

From iOS / iPadOS version 14.5, a new setting has appeared proposing to allow application access to the Local network. This option is offered when installing a new application, but is not necessarily activated if the application is already installed when updating the OS.

Since then, many of you can no longer connect certain applications (Weather4D, iNavX, aso.) to devices connected via Wi-Fi : Iridium GO!®, multiplexers, various NMEA gateways. To do this, you must activate this "Local network" option for the application concerned. Read more …