Mesoscale wind data
for site screening
- ready in seconds

Get 21 years of hourly wind time series, precomputed at 2 km resolution and 10 heights

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Whiffle Atlas is trusted by industry leaders

A consistent, long-term wind climate
for early-stage site screening

  • 21-year time series
  • Hourly-averaged
  • 2 km resolution
  • 10 heights
  • 15 variables
  • Instant download

Whiffle Atlas provides 21 years of hourly-averaged mesoscale wind data at 2 km resolution and 10 fixed heights (up to 500 m), enabling consistent comparison of candidate sites before measurement campaigns or high-resolution modelling are in place. Use the full time series to compare wind speed distributions across locations, quantify vertical shear variability across heights, assess how vertical profiles vary under stable and unstable atmospheric conditions, and evaluate directional and interannual variability over a 21-year record. Wind rose, Weibull and vertical profile statistics are available directly in the platform. The complete hourly time series can be exported for detailed analysis in your existing workflows.

Evaluate Whiffle Atlas with a 30-day trial

Create a free account to access Whiffle Atlas for 30 days. During the trial, you can download up to five 21-year mesoscale datasets at locations of your choice. Use the trial period to compare candidate sites, review vertical wind behaviour, and test integration within your wind resource workflows.

Whiffle Atlas is currently available for Europe, the US, Australia, Japan, and Korea, with additional regions in development. Pick any site in these regions for your free trial, or request coverage for a location you don’t see yet.

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Accuracy matters, especially
when you're long-term correcting

A near-zero mean wind speed bias and narrow error spread

Whiffle Atlas is generated by the Whiffle Meso model and has been rigorously benchmarked against over 300 met masts across 170 sites globally – including onshore, offshore, and complex terrain. 

Across these validation campaigns results show:

  • a mean wind speed bias of 0.07 m/s
  • standard deviation of 0.48 m/s.

This narrow error spread provides a consistent, long-term reference for comparing candidate sites.

"A major step forward in long-term wind modelling"

"Atlas is a major step forward in long-term wind modelling – driving deeper understanding of long term trends for projects dominated by mesoscale effects and terrain induced complex flows. Alongside the Whiffle LES model, it has improved the consistency and accuracy of our predictions, reducing uncertainty in our wind resource assessments, and helping reduce long term project risk."

-Jeffrey Snyder, Snr Wind Resource Analyst (GE Vernova)

Trusted for accuracy, chosen for speed, scale, and usability

Data is ready in seconds, preview wind statistics instantly

Whiffle Atlas data is precomputed and instantly accessible. Insert coordinates to retrieve 21-year time series and inspect wind rose, Weibull distribution, and vertical profiles directly in the Analytics tab. Export as CSV or NetCDF when needed.

Key heights and variables are resolved and available

Get hourly data at 10 fixed heights (up to 500 m), with key variables including wind speed, direction, pressure, density, and stability indicators – delivered in one file.

 

Affordable access for portfolio-wide screening

Access starts at €450 per download, with discounts for volume or regional bundles. Export datasets in NetCDF or CSV, ready to use in WindPRO, OpenWind, or your internal tools. API access is also available.

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Access options

Whiffle Atlas is accessible via a UI or API. Integration with partner apps coming soon.

Web application

Log-in to the Whiffle Atlas web application, enter your site coordinates and get your data in seconds.

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API Client

Whiffle Atlas is available programmatically through our REST API – with an official Python SDK for developers.

Learn about API Access

Pricing

From free trials to portfolio-scale access – choose the plan that fits your workflow.

Free trial

  • Validate on your own sites before you commit
  • Includes 5 free mesoscale downloads (your choice of locations)
  • Instant download - outputs ready in seconds

Per-site lookup

Discounts

  • Discounted tile packs and flat-rate regional access
  • Custom pricing for large portfolios
  • Ideal for consultants and developers working across markets

Frequently Asked Questions 

What is Whiffle Atlas?

Whiffle Atlas is a validated, precomputed, mesoscale dataset offering 20-year hourly wind time series at 2 km resolution across 10 heights (2m –500 m). Built for MCP workflows and early-stage screening, it’s instantly downloadable and available today for Europe, the US, Australia, Japan, and Korea.

Whiffle Atlas provides finer spatial resolution (2 km), is precomputed, directly downloadable at 10 heights (from 2m to 500m), and validated against over 300 met masts globally. 

What sets Atlas apart is its performance: across validation campaigns, it shows lower wind speed bias and higher correlation to measurements than other mesoscale datasets. That means reduced uncertainty in long-term wind estimates, especially in nearshore zones, coastal areas, and complex terrain where global models tend to underperform. 

Use Atlas as an additional reference in your MCP, alongside ERA5, or as a faster alternative to traditional on-demand mesoscale simulations. 

The Whiffle Meso model is Whiffle’s in-house mesoscale weather model, developed alongside its LES model. Like LES, it is a physics-based numerical model but it operates at a coarser horizontal resolution of 2 km. While it does not resolve turbulence directly (as turbulence is typically smaller than 1 km), it uses physical parametrisations to capture the net effects of turbulence on atmospheric flow.

This makes the Whiffle Meso model well-suited to resolve larger-scale phenomena like coastal transitions, regional wind gradients, and sea breezes. It is used both as a pre-driver for LES simulations and as a standalone engine for generating long-term wind climatologies – as in Whiffle Atlas. This allows for cost-effective coverage of large spatial domains and multi-decade timeframes.

Five site lookups: 21-year, hourly wind datasets at 10 heights for any location in the available regions. No credit card, no setup required.

Measure-Correlate-Predict (MCP)?
✅ Yes – You can download long-term, hourly time series at mast or LiDAR locations for bias correction.

Horizontal extrapolation across turbine sites?
⚠️ Limited – Atlas can show wind gradients at 2 km resolution, which is useful for early-stage prospecting. For layout-level extrapolation, use Whiffle Wind WRGs.

Site-specific fine-scale flow modelling?
❌ No – For flow modelling at turbine level or within complex terrain, use Whiffle Wind’s LES simulations at 100 m resolution or finer.

Offshore site screening?
✅ Yes – Atlas provides a long-term wind reference across offshore clusters or lease zones where measurements are sparse or unavailable.

  • Horizontal: 2km × 2 km grid. 
  • Vertical: 2 m, 10 m, 50 m, 100 m, 150 m, 200 m, 250 m, 300 m, 400 m, and 500 m above ground level

20 years of hourly values at 2m, 10m, 50m, 100m, 150m, 200m, 250m, 300m, 400m, 500 m. The meteorological variables included are wind speed, wind direction, vertical velocity, air density, pressure, surface pressure, temperature, surface temperature, relative humidity, boundary layer height, turbulence kinetic energy, Brunt-Väisälä frequency squared, vertical shear squared, Richardson number, inverse Obukhov length.

No. Atlas is based on the Whiffle Meso model (mesoscale). For raw LES at 100 m resolution, use Whiffle Wind. 

You can start for free, no credit card required. Every user gets 5 free dataset downloads to test Whiffle Atlas on their own sites.

After that, access is simple and scalable:

  • €450 per site download

  • Discounted rates available for bulk lookups, regional coverage, or portfolio subscriptions

Whether you need data for one project or dozens, there’s a plan that fits.

Yes, via the Whiffle Python client: whiffle-client on PyPI.

Yes. Whiffle Atlas currently covers Europe, the United States, Australia, Japan, and Korea — with more regions in development. If your project site falls outside these areas, reach out to us directly via support@whiffle.nl. Custom regions can often be added based on demand or generated upon request.

Not yet, but this feature is planned to be released soon.

No. By default Atlas delivers the time series for the last 21 whole years, which currently is 2004-2025.

Time series output in .csv and .netCDF are available today. Statistical and gridded output in the form of a WRG export is in development.

Yes, particularly for extrapolation across turbine clusters and regions with sparse measurement coverage.

Yes. The Whiffle Meso model accounts for terrain and land–sea transitions at 2 km scale, improving representativeness compared to coarser reanalysis.

You can get started with creating your account, by filling in this form.

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2629 JD Delft

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