Meteorology

2025 marks the 100 ans de l’émission de prévisions météorologiques maritime Shipping Forecast sur la BBC Radio 4. This emblematic transmission, produite par le Met Office pour le compte de MCA_media, continue d’être un service de sécurité vital pour les Read more …

Updated 2.1 tutorials : Get the weather forecast by satellite phone Get Weather forecast with Satphone at Sea. Updating New Offers (Services and Rates) and Starlink Terms of Use at 10 October 2024. –––

No, these are not the catastrophic rantings of an inveterate collapsologist, but from a very serious study reported by the climatologist Stefan Rahmstorf. I give here a French and freely adapted transcription. The warm currents that reach Europe are now called Read more …

The Pacific Ocean is transitioning from an El Niño episode earlier this year 2024 to a La Niña situation expected at the end of this summer. But it seems, for NOAA scientists, that a similar phenomenon Read more …

The ENSO climate phenomenon (El Niño Southern Oscillation) had experienced a new “El Niño” episode towards the end of spring 2023 in the tropical regions of the Pacific (¹). After reaching a peak between November and December Read more …

Episode 2 – Illustrations IFREMER forecasts (see Episode 1) available in Weather4D are of two kinds : Current forecasts from the MARS2D model Sea state forecasts (combined currents and waves) based on the WW3 Ces model Read more …

Episode 1 – Description Since 7 May 2024 the latest versions of Weather4D have been enriched with several new weather and ocean models (¹). Among the latter, ultra-high current and wave forecast models Read more …

An incomprehensible malfunction occurred recently for a Weather4D user, sailing in a “lost hole” on the edge of the Indian Ocean, namely the Cocos Islands, challenged me to the point of getting lost in conjectures. A GFS file to Read more …

Following the forecast of an El Niño episode beginning in March 2023 (¹) and confirmed the following June (²), this climatic phenomenon of the Pacific Ocean, called ENSO (El Niño Southern Oscillation), strengthened until Read more …

Updated 1.9 tutorials : Get the weather forecast by satellite phone Get Weather forecast with Satphone at Sea. Correction implemented GOexec® with Weather4D –––

El Niño continues to develop in tropical Pacific regions. Forecasters expect the phenomenon to continue until spring, with 75 up to 85 % likely to become an intense event. An El Niño plus Read more …

Updated 1.8 tutorials : Get the weather forecast by satellite phone Get Weather forecast with Satphone at Sea. What's new ? Complete overhaul of books : descriptive, tariffs, implementations, screenshots. Introduction and implementation Read more …

After three years of La Niña phenomenon (¹) in the tropical Pacific Ocean (from mid-2020 to mid-2023) having brought a fairly calm meteorological situation to Polynesia : regular trade winds, lack of hurricane, mainly dry weather, this idyllic situation will be reversed Read more …

Florence Rabier, Director General of ECMWF, has developed February the 13 February the projects of the European Center for Medium-Term Meteorology for 2023 (¹). She announced a major update to the IFS forecasting model (²) planned in Read more …

  Europe is moving forward slowly, but she moves forward… towards free access to data from public services ! On September 21 December 2022 was published in the Official Journal of the European Union, under the reference C/2022/9562, the “Executing Regulations Read more …

The October Marine Guide 2022 for recreational boating from Météo-France has been updated. All the detailed information and ways to take the weather forecast at sea, from the coast to the open sea. All frequencies and times Read more …

With the Routing version & Navigation 2.0.81, Weather4D supports weather files in GRIB2 format by external download. For example, the very high resolution model ICON-D2 (¹) from the German Weather Service(DWD) for Northern Europe can be opened in Read more …

More and more of you have adopted the Iridium GO! for its easy way to request GRIB files, directly from Weather4D and some other applications. But some also want to transfer these files to PC for Read more …

Trafalgar Hit for the flagship of European meteorology, despite Brexit and contrary to what had been planned (¹), the European Center for Medium-Range Weather Forecasts will remain in England ! Even better, a new Read more …

I've been asked this question regularly, but until now I've never wanted to give my opinion on the subject publicly, so as not to offend anyone or create unnecessary controversy.. But by doing it Read more …

[Updated 29 July 2022] 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 Read more …

In Weather4D applications (all versions) most weather models offer data called the CAPE. Convective Available Potential Energy, in French : Energie potentielle de convection disponible. Behind this obscure acronym hides a powerful storm forecasting tool. The Read more …

In an article updated in August 2020 (¹), I described nautical works in digital format that can be usefully saved on iPad in the Apple Books application. Among them I mentioned the Météo-France works available in PDF format Read more …

Many sailors who cross the "Big Blue" have known for ages that, if the navigation is relatively easy, the weather represents a particularly difficult constraint to deal. Indeed, if the coasts are mostly steep and the dangers Read more …

The new “Introduction to Marine Weather” tutorial is available on the iBook Store (¹). A complete reworking of the originally published book in 2015, new, clearer and more readable layout in portrait mode, ful revision of the text, update Read more …

NOAA (¹) annouced on 22 March a major upgrade to its GFS weather forecast model. For the first time, le Global Forecasting System (GFS), NOAA's flagship weather forecast model (¹) will be coupled to Read more …

Dans Weather4D, as generally in other applications, sea ​​state forecasts are described by ocean models. The most used is the WW3 model (Wave Watch III), published by FNMOC (Fleet Numerical Meteorology and Oceanography Center) Read more …

Source : The Parliament Mag par Umberto Modigliani, ECMWF Deputy Director of Forecasts, responsible, with the department director, continuous production of forecasts and relations with users. Early October, the European Center for Forecasts Read more …

Created in 1975 at the initiative of members of the European Union, the European Center for Medium-Range Weather Forecast is an independent intergovernmental organization whose headquarters, until this day, is located in Reading, England. ECMWF is funded by Read more …

HF Weather Fax from Black Cat Systems is an application for decoding facsimile weather maps on an iPad, an iPhone or Android device. Weather analysis and forecast maps are provided by radio stations Read more …

Weather analysis and forecasting maps developed by the NOAA (USA) and the Met Office (UK) cover vast areas over the Wold. They can be obtained by email by sending a request by email to the weather server of the Read more …

I relayed in December 2018 an excellent article published on the blog of our friends at Geogarage, who make a permanent duty of a press review of the best foreign articles concerning cartography, meteorology, and more generally all Read more …

It's been a long time since I've written a book report in this section.... Lack of time, or lack of discovery ? I once again found real literary enthusiasm after reading this excellent work by Read more …

[Update 15 February 2019] The recent update of the Iridium Mail application & Web gives me the opportunity to refresh this post originally written in December 2011. The Wi-Fi Optimizer gateway from the RedPort company allows owners Read more …

A year after my advocacy for free European data (¹) Météo-France finally offers free access to its two famous ARPEGE and AROME models. A welcome development, started in 2014 by the success of the MyOcean project, Read more …

By a corrected notification on 23 December 2014 (¹), with NWS (National Weather Service) NOAA announced a major update to its GFS weather prediction model to be effective in mid-January 2015. Actually, Read more …

This could be a subject of the Baccalaureate in Economic Sciences, and although I never took this exam (due to post-sixty-eight incompatibility and chronic cancer) the subject seems sufficiently imminent and serious to me to attempt Read more …

With the basic 1.3.3 and PRO versions 1.3.9 delivered last November, Weather4D had replaced Great Circle's fine-mesh GRIB files with its own files based on the American WRF model (¹), calculated by its own Read more …

Since version 3.6.1 iNavX offers display of high resolution GRIB weather files from theyr.com. This English site from the company Kona Ltd is the developer of the GribView application which I talked about in a previous post (¹). An account Read more …

The Atlas of Oceans by Jimmy and Ivan Cornell is a gold mine in color A3 size of over one kilogram. This one won't fit in an iPad ! 60 pilot charts latest data updates, Read more …

With Weather4D PRO and AxcessPoint, associated with an Iridium satellite phone, we now have a complete solution, reliable and low cost to receive, display and manage GRIB files in open seas with iPad. iNavX and Navionics cartography Read more …

The new Weather4D PRO application for iOS (iPhone / iPad), developed by Olivier Bouyssou, was submited yesterday to Apple. It provides advanced functions associated with GRIB files for demanding users. It complements the Weather4D application which has obtained Read more …

Thierry Dubois and his teammates, including Jacques Vermeulen who is experimenting with his Iridium connection with his brand new MacBook Air, must not be laughing at the time I post this short post. La Louise, conveying from Newfoundland to La Trinité, Read more …

Weather4D 1.2 will be introduced by the designer, Olivier Bouyssou, at Grand Pavois boat show in La Rochelle from 15 until 17 September on the iPadNav.fr stand. This new version 1.2, which will be available as an update on the iTunes App Store Read more …

XyGrib, the GRIB weather file viewer developed under Linux and well known in the PC world, is the subject of a port on Mac which, since version 5.0, is real progress compared to the first versions. Since the beginning 2011 il Read more …

Created in 1988, the Météo Consult company was the first private meteorology company in France. She mainly developed paid forecasting services for professionals, leaving the public service Météo France to take care of free forecasts for Read more …

Two months after out for iPhone, Weather4D (¹), by surprising Olivier Bouyssou, arrives with a version fully optimized for iPad, with the modest release number 1.1. This unique iPhone/iPad version is therefore a simple update Read more …

Disturbances are not just atmospheric, it happens that they are also in the transmission of GRIB files ! Some of you alert me for two or three days about difficulties to receive files, or even the absence Read more …

With the versions 3.1.6 and 3.1.7, iNavX improved GRIB files request by proposing a new window settings. As for MacENC, can now choose several settings for required files, in order to optimize the size Read more …

The Weather menu in these two applications allows you to request a GRIB weather forecast file and then view it on the open map.. The Request GRIB File function sends a request to the Saildocs.com server which returns to Read more …

In a previous post on my favorite applications for iPhone, I cited two weather apps : La Chaine Météo, very good general weather application from Meteo Consult, and iSailing Weather which offers file-based marine weather charts Read more …

Marine weather, or rather I should write : Marine Weather, with capital letters, is to modern navigators what the ancient gods were to our distant ancestors : a permanent reference to the conduct of our life.
1 – The Long Waves

Not so long ago, this divinity was speaking to us, sailors to trade, fishermen or boaters, by a celestial voice carried by the waves. Our high priestess, Marie-Pierre Planchon, informing us twice a day of the destinies, happy or terrible, that we risked experiencing by venturing out on the waves. In those days the weather had a name and a voice, recognizable at a glance. Read more …