> For the complete documentation index, see [llms.txt](https://docs.whiffle.cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.whiffle.cloud/release-notes/2026.md). # 2026 Stay up-to-date with the latest updates on Whiffle Wind by [subscribing](http://eepurl.com/iQb8wA) to our monthly newsletter. ## 2026-10-13 **Whiffle Wind:** * A new `nrel5mw` turbine model with a corrected thrust curve has been added. The previous version is deprecated and no longer appears in the turbine list. Existing simulations that use it keep their original specifications, and its details remain viewable. * Selecting a turbine model when setting up a simulation has been improved: the selector now shows the turbine name and ID. Once a turbine is selected, a link takes you to its detail page to check the power and thrust curves. ## 2026-09-25 **Whiffle Wind (statistics & time series)** * **Attach your own geodata:** all users can now attach custom terrain, surface and/or canopy data to their simulations. * **High-resolution LES at 40 m:** all users can now request high-resolution LES simulations at 40 m resolution. * **Geodata download renamed to "GeoTIFF":** downloads now include simulation outputs such as wind speed as well as geodata, so the download option is now labelled "GeoTIFF." **Whiffle Wind (time series)** * **Support for 200+ met masts:** timeseries simulations can now include more than 200 met masts. **Whiffle Wind and Atlas** * **Descriptive browser tab titles:** each browser tab now shows a title describing the current page, so it's easier to tell multiple open tabs apart. ## 2026-09-07 **Whiffle Wind** * **Full GeoTIFF set for statistics simulations:** statistics simulations now include the complete set of GeoTIFFs. Previously you only received terrain quantities such as elevation, and now you also get wind flow quantities such as turbulence intensity. * **New GeoTIFF outputs (statistics & time series):** * **Wind shear:** shows how quickly wind speed increases with height, to help you select the best turbine for a site. * **Representative turbulence intensity at 15 m/s:** the 90th-percentile TI, also to help you select the best turbine for a site. * **Terrain complexity map:** based on the RIX index, for a quick assessment of where the wind flow is likely to be laminar or turbulent. * **GeoTIFFs grouped by category (statistics & time series):** GeoTIFFs are now organised into two groups, Terrain and Wind Flow, so you can find what you need faster. **Whiffle Wind and Atlas** * **New map layout:** map controls have been repositioned for a cleaner view: * *Top right:* boundaries legend and controls (full screen, 3D map, compass) * *Bottom left:* scale and attributions * *Bottom right:* map menu (backgrounds, overlays) and editable legend colorbars ## 2026-08-05 **Atlas** * **Weibull plots now capped at 35 m/s** (previously 50 m/s), removing the stretch of empty space at the high end of the plot. * **Fixed download failures in tile overlap zones**: downloads requested in the \~15 km strip where adjacent tiles overlap no longer fail. * **Downloads no longer marked successful prematurely**, which previously could result in a download being charged to your balance before it had actually completed. * **Clearer ERA5 timeout errors**: if an ERA5 download times out, you'll now see a descriptive error instead of the download staying stuck on "pending." **Whiffle Wind (time series)** * **Geotiff metadata included**: every GeoTIFF, whether viewed as a map layer or downloaded, now comes with its metadata (units, colormaps, etc.) attached. * **New output quantities available as GeoTIFFs**: surface roughness length, mean wind speed per height, mean turbulence intensity at 15 m/s per height, and canopy heights. All can be inspected via map layers or downloaded. * **More informative turbulence intensity GeoTIFF**: mean turbulence intensity is now generated at 10 m/s (per height) instead of across all wind speeds, since turbines mostly operate around that speed. **Geodata upload in Whiffle Wind** *This feature is behind a feature flag. Early access is available via Whiffle Support.* Attaching uploaded geodata to a simulation now happens directly in the **Site** step, instead of the Via Support area. Geodata isn't yet supported for direct runs, but we've made this interface change ahead of that becoming available. ## 2026-07-22 * Customers using our Python client on machines without browser access can now log in via the **OAuth device code flow**. ## 2026-07-07 * **ERA5 data** can now be downloaded from Atlas for free, offering 26 years of representative data at 31 km resolution. Simply add a point to instantly download ERA5 data. * Added **Elevation and Mean Turbulence Intensity overlays**, downloadable as GeoTIFF. On the simulation detail page of Whiffle Wind, overlays can be activated via the map layer button or downloaded via the Download button. * In Whiffle Wind, you can now switch resolution from 100 meter to 40 meter and start the run directly. *This feature is behind a feature flag. Early access is available via Whiffle Support.* ## 2026-06-24 Added filters above the simulation list. You can now filter by simulations you created, time series or statistics type, and status (e.g. draft, successful, in progress). ## 2026-05-22 **Configurable wind direction sectors** Previously defaulted to 16 sectors before moving to 12, reflecting standard practice in wind resource assessment and layout analysis. Both options are now available — choose what works for your workflow. **Broader file format support** Import met masts, wind farms, turbines, and areas of interest from a wider range of formats: KML, KMZ, GeoJSON, GeoPackage, GPX, zipped shapefile, and CSV. Upload your existing GIS data directly, without conversion steps. ## 2026-05-13 **Calibration** has left beta and is now **available to all users** 🎉. Projects with met mast or LiDAR data can integrate measurements directly into the WRG generation process, aligning the simulated wind climate with observed conditions and eliminating bias on mean wind speed. Calibration is currently supported for Statistics simulations only. To request a calibrated Time Series, set up a simulation in Whiffle Wind and select **Run via support** on the Overview step. {% content-ref url="/pages/WUPxEO7BNmYxEbU5YXpz" %} [Measurements](/getting-started/adding-custom-data/calibration.md) {% endcontent-ref %} ## 2026-05-07 * The Simulation Setup Outputs step now shows only sections and input fields relevant to the current data selection, reducing clutter and improving clarity. * In the turbine model form, **Reference density** has been renamed to **Power curve air density** and **Reference Turbulence Intensity** to **Power curve turbulence intensity**, to better reflect their meaning. ## 2026-05-05 The Wind Farm and Met Mast steps have been merged into a single step called **Site**. The new Site step also lets you define an area and set up calibration with measurements. ## 2026-04-08 #### **Atlas** 📊 **Export analytics charts as PNG** You can now save any chart on the Analytics page as a PNG image by clicking the camera icon — making it easier to share results and include visuals in reports. 📅 **Representative period now visible** The representative period for your data is now shown on both the **Analytics** and **Download** tabs. #### **Whiffle Wind** **Fixed tooltip visibility for wind farm placement** A bug that caused the wind farm placement tooltip (explaining whether a farm is inside or outside the LES boundary) to be partially hidden behind the map has been fixed. The full guidance is now visible. #### **Measurements in Whiffle Wind** *This feature is behind a feature flag. Early access is available via Whiffle Support.* **Smarter measurements uploader** Uploading measurement data is now more flexible and forgiving: * **Sensor names with brackets** are now accepted, removing a common source of upload errors. * **Special characters in column headers** are supported, and leading/trailing spaces are automatically trimmed so your data is cleaned on import. * **Automatic timezone conversion** handles timestamps with UTC offsets, so you don't need to pre-process time data manually. * **Timestamps are trimmed automatically**, preventing hidden whitespace from causing failures. * **Clearer time format errors** — if a time format isn't recognised, you'll now get a specific error message. * **CSV delimiter auto-detection** means both comma- and semicolon-separated files are accepted without any manual adjustment. * **Most characters in file names** are now supported, so you rarely need to rename files before uploading. * **More flexible timestamp column names** — in addition to "Timestamp" and "Time", the uploader now recognises variations like lowercase "time" and "timestamp". * **Common placeholder values** such as `-99`, `9999`, `9999.99`, `-`, and empty strings are now automatically treated as missing data (NaN), preventing these from skewing your results. **Validation for measurement heights** Atlas now checks that every measurement height includes both a wind speed and wind direction, catching incomplete configurations before they cause issues downstream. **Status icons in Measurements and Geodata lists** Measurements and Geodata items now display a clear status icon showing whether an item is a **draft** or has been **marked as final** — so you can quickly see what's ready to use in a simulation. ## 2026-01-29 * Implemented **automatic name saving** in the Simulation Wizard. Simulation names are now saved while typing, preventing loss of draft data. * Added **plots in the Atlas side panel** for **Weibull, wind rose, and vertical wind speed profiles**, making it easier to **inspect weather data on the fly**. *This feature is behind a feature flag and will be available shortly.* * Added **Measurements, Geodata, and Support info** to the Simulation Detail page, allowing both users and Whiffle Support to see which data was used in a **Via Support** run. * **Default number of wind sectors** is now **12 instead of 16** for Statistics data in Whiffle Wind.