Delft, The Netherlands, 27 October 2025 – Whiffle has launched Whiffle Atlas, a new mesoscale weather data service that provides instant access to 20 years of precomputed hourly wind data. RWE, one of Europe’s largest renewable energy developers, has already integrated Whiffle Atlas into its global wind resource assessment workflows.
Ready-to-use mesoscale data
Whiffle Atlas provides long-term wind time series at 2 km resolution across ten fixed heights (up to 500 m). Analysts can download the data in seconds, and use it directly for their MCP and site-screening workflows.
“With the Whiffle Atlas, our goal was to build a service for accurate, long-term wind data that developers and analysts can rely on,” said Thijs van Winden, CTO at Whiffle. “It’s been validated across hundreds of onshore and offshore sites, showing near-zero bias and a very tight error spread. Seeing it now in use across RWE’s global portfolio is a strong signal that Atlas delivers the level of quality the industry has been asking for.”
Long-term accuracy guaranteed
Powered by the Whiffle Meso model, Whiffle Atlas resolves atmospheric features – such as coastal transitions, regional gradients, and complex terrain flows – that global reanalysis may often miss. Validated against over 300 met masts across 170 onshore and offshore sites, it shows low bias, narrow error spread and high correlation, compared to standard mesoscale datasets.
Trusted by RWE
RWE was actively involved in testing the Whiffle Atlas during its development and is now using it operationally across its global projects.
“At RWE, we rigorously benchmark every dataset before bringing it into our internal processes,” said Sam Williams, Senior Scientist at RWE. “Whiffle Atlas has demonstrated the long-term accuracy and reliability we need – it’s become a trusted reference for MCP and early prospecting. Having this quality of mesoscale data available instantly has changed the way we approach early-stage assessments. It means our teams can evaluate sites faster and with greater confidence, knowing the inputs are already benchmarked and ready to use.”
Now available across major wind regions
Whiffle Atlas is now available for Europe, the United States, Australia, Japan, and Korea, with additional regions under development (or available upon request). Datasets include 15 meteorological variables such as wind speed, direction, pressure, air density, stability, and boundary-layer height at 10 fixed heights (2m, 10m, 50m, 100m, 150m, 200m, 250m, 300m, 400m and 500 m).
Outputs can be exported CSV and NetCDF formats for use in tools such as WindPRO and OpenWind, or accessed via Whiffle’s REST API, ensuring seamless integration into existing workflows.
For more information, visit whiffle.nl/atlas or contact info@whiffle.nl
About Whiffle
Whiffle B.V. was founded in 2015, starting as a spin out of the Dutch Delft University of Technology. With its roots in science, the company continues to use cutting edge R&D to further develop Large Eddy Simulation (LES) models and its unique implementation on high performance computing systems. This resulted in the world’s first Large Eddy Simulation (LES) based operational weather model that produces highly accurate and ultra high-resolution weather forecasts. Application areas of Whiffle’s model include short-term wind and solar power forecasting, wind resource assessments and wind energy yield modelling.
About RWE
RWE is a leading global renewable energy company headquartered in Germany. With a strong commitment to sustainability, RWE is driving the energy transition through extensive investments in onshore and offshore wind, solar power, battery storage, and hydrogen solutions. Leveraging decades of expertise and innovative technologies, RWE develops, builds, and operates renewable energy projects worldwide, significantly contributing to the growth of clean, reliable, and affordable energy.