Meltemus Grib Service
The Meltemus grib service provides access to high-resolution weather, wave, current and tide data directly from qtVlm, on all platforms (Windows, MacOS, Linux, Android, iOS and Raspberry) and with no limit on the number of devices: use your subscription in parallel on your computer, tablet and phone.
The latest version of qtVlm is required to perform the download. The resulting files are standard GRIB files that can then be used in any compatible application.
🎉 Launch period: the Meltemus grib service is free for everyone until 15/05/2026. To benefit from it: download the latest version of qtVlm, select a zone and choose the "Grib Meltemus" source. You can already subscribe now: your subscription will automatically start at the end of the free period, ensuring uninterrupted access.
GFS data (atmosphere and waves) will remain free for all qtVlm users, even after the launch period. The subscription gives access to all the models listed below.
Atmospheric models provide as applicable: wind (surface and altitude), pressure, temperature, dew point, humidity, gusts, precipitation, cloud cover, CAPE/CIN, visibility, ice (cover and thickness), reflectivity, 0°C isotherm.
Subscription pricing
A single subscription gives access to all the models listed below. Choose the duration that matches your usage:
| Duration | Price |
| 3 months | €20 |
| 6 months | €35 |
| 12 months | €59 |
The grib data subscription is independent of the qtVlm license. qtVlm is free on Windows, MacOS, Linux and Raspberry; on Android, iOS and Windows tablets, the full version (one-time purchase) is still required to fully exploit the downloaded data (routing, advanced charts…).
Access to the service is via a Meltemus account. Following your purchase, we will create this account and send you the connection details by email, which you can then enter in the qtVlm license manager (menu->qtVlm->License management). As this account creation is done manually on our side, a short delay may occur between your purchase and the effective activation of your subscription.
Model coverage map
Click on a zone to see the model details. Use the filters to show/hide categories.
Atmospheric models - Global coverage
| Model | Provider | Resolution | Horizon |
| GFS | NOAA | 0.25° / 0.5° / 1° | 16 days |
| ECMWF IFS | ECMWF | 0.25° | 15 days |
| ICON Global | DWD | 0.125° | 5 days |
Atmospheric models - High-resolution regional
| Model | Provider | Resolution | Horizon | Zone |
| HRRR | NOAA | 3 km | 48h | USA (CONUS) |
| HRRR hourly | NOAA | 3 km | 18h | USA (CONUS) - updated every hour |
| ICON Europe | DWD | 6 km | 5 days | Europe |
| ICON D2 | DWD | 2 km | 48h | Germany |
| ARPEGE | Météo-France | 10 / 25 km | 4 days | Europe / North Atlantic |
| AROME France | Météo-France | 1 / 2.5 km | 51h | Metropolitan France |
| AROME West Indies | Météo-France | 2.5 km | 48h | West Indies |
| AROME French Guiana | Météo-France | 2.5 km | 48h | French Guiana |
| AROME Réunion / Mayotte | Météo-France | 2.5 km | 48h | Indian Ocean |
| AROME Polynesia | Météo-France | 2.5 km | 48h | French Polynesia |
| AROME New Caledonia | Météo-France | 2.5 km | 48h | New Caledonia |
| ICON-2I | ItaliaMeteo | 2.2 km | 72h | Italy |
| WRF LaMMA | ItaliaMeteo | 1.5 km | 72h | Italy |
| RDPS | ECCC (Canada) | 10 km | 84h | North America |
| HRDPS | ECCC (Canada) | 2.5 km | 48h | Canada |
Waves
| Model | Provider | Resolution | Horizon | Zone |
| GFS Waves | NOAA | 0.16° / 0.25° | 16 days | Global |
| ECMWF Waves | ECMWF | 0.25° | 15 days | Global |
| MFWAM | Météo-France | 2.5 / 10 km | 4 days | France / NE Atlantic |
| Copernicus Waves | CMEMS | 0.08° | 10 days | Global |
| AMM15 Waves | UK Met Office | 1.5 km | 7 days | NW Europe (Channel, North Sea, North Bay of Biscay) |
Currents and tides
| Model | Provider | Resolution | Horizon | Zone |
| Copernicus Global | CMEMS | 0.08° | 10 days | Global |
| RTOFS Global | NOAA | 1/12° (~8 km) | 72h | Global |
| Copernicus IBI | CMEMS | 0.027° | 10 days | NE Atlantic (Spain to Ireland) |
| Copernicus Mediterranean | CMEMS | 0.04° | 5 days | Mediterranean |
| SHOM HYDRO Atlantic | SHOM | 2.5 km | 5 days | Atlantic France (Channel to Bay of Biscay) |
| SHOM HYDRO Mediterranean | SHOM | 1.7 km | 5 days | North Mediterranean |
| AMM15 Currents | UK Met Office | 1.5 km | 7 days | NW Europe (Channel, North Sea, North Bay of Biscay) |
| OFS | NOAA | 250 m | 2-5 days | 13 US coastal zones and Great Lakes |
The OFS model for US tide and current forecasts have been expanded to also provide the digital depth data used in the model as well as the forecasted water depth based on these depths and the forecasted tides.
Data provider attributions
ECMWF:
Based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF). ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use.
DWD (ICON):
Source: Deutscher Wetterdienst. Datenlizenz Deutschland - Namensnennung - Version 2.0 (DL-DE/BY-2.0).
Météo-France (ARPEGE, AROME, MFWAM):
Source: Météo-France. Licence Ouverte Etalab 2.0.
Copernicus Marine Service (CMEMS):
Generated using E.U. Copernicus Marine Service Information. Products are provided without any express or implied warranty regarding quality, accuracy, availability, or fitness for purpose.
SHOM:
Source: Shom. Licence Ouverte Etalab 2.0.
ItaliaMeteo (ICON-2I):
Source: National Agency for Meteorology and Climatology "ItaliaMeteo". CC-BY 4.0.
UK Met Office (AMM15):
Contains public sector information licensed under the Open Government Licence v3.0. The Information is licensed 'as is' and the Information Provider excludes all representations, warranties, obligations and liabilities in relation to the Information to the maximum extent permitted by law.
NOAA (GFS, HRRR, OFS, RTOFS):
Data provided by NOAA/National Weather Service. Public domain (US Government).
ECCC (Canada RDPS, HRDPS):
Source: Environment and Climate Change Canada. Open data, free for commercial use.