Datasets

Various thermall comfort parameters showing thermal comfort

ECMWF is now running a series of data-driven forecasts as part of its experimental suite. These machine-learning based models are very fast, and they produce a 10-day forecast with 6-hourly time steps in approximately one minute. The outputs are available in graphical form.

Currently, three of these models are available:

ECMWF is now running its own Artificial Intelligence Forecasting System (AIFS). The AIFS consists of a deterministic model and an ensemble model. The deterministic model has been running operationally since 25 February 2025; further details can be found on the dedicated Implementation of AIFS Single v1 page.

Specific humidity gives an indication of the amount of moisture within a sample of air (in g of water vapour within a kg of air, g kg⁻¹). The chart shows the specific humidity at 1000 hPa and 925 hPa levels and...