A segment-level environment model applied inside an optimization.
Wind belongs to Pacing and Equipment optimizations (the Wind step), not to courses. Every run keeps a copy of the wind it was calculated with.
Change segments? Update forecast—wind is fetched for the current segmentation.
If the optimization belongs to an event, the date is locked to the event date; you can only change the start time (default 08:00).
Before the first forecast
Local date and time of the event → the race start time, in local time at the course start. It drives the forecast.
Get forecast → fetches the wind for every segment (“Depending on the number of segments this can take a minute.”).
Or Edit wind manually to enter the wind yourself.
After fetching, three cards summarize the wind:
Forecast schedule: date & time and Update forecast.
Wind forecast: the range of wind speeds and the average direction (Wind from), plus when the forecast was fetched.
Manual wind overrides: how many segments use manual wind, with Edit segments and Use forecast for entire course.
Below, the course map shows the wind direction per segment (toggle Show wind on the map).
Edit segment wind (opened via Edit segments)
Per-segment columns: Manual (toggle), Headwind [km/h] (computed projection along the segment), Wind from (16 compass directions), Wind speed [km/h].
Bulk edit for multiple segments:
Tick the segment rows of interest.
Define manual wind → set one Wind from / Wind speed and Apply it to all selected rows.
Use forecast → revert the selected rows to the forecast.
Click Confirm to save.
Pacing Optimization: determines where the optimizer biases power (e.g., more on headwinds/climbs). Wind also drives the automatic grouping of flat segments (headwind / windless / tailwind).
Equipment Optimization: affects aero outcomes for each setup.
Forecast is fast and consistent—best for broad planning.
Manual is for local knowledge (e.g., typical afternoon thermal, venue micro-wind) or “what-if” tests.
Mix them: leave most segments on forecast and override only where you have better info.
Finish course segmentation.
Set Local date and time of the event and click Get forecast.
Override selectively with Manual where you have trusted intel (or use Define manual wind for controlled scenarios).
If you change segments later, Update forecast before running.
Re-fetch wind close to race day with Update forecast and run again (Edit & rerun) — the new run is suggested the name “Updated weather forecast”.
Pair wind + grouping: flats are grouped by exposure (headwind / windless / tailwind) for a clearer, more realistic plan.
Editing segments but forgetting to hit Update forecast. New segments show “No forecast data”, and Next stays disabled until every segment has forecast or manual wind (“Wind data incomplete”).
Bulk-setting manual wind then assuming forecast updates still apply—use Use forecast (or Use forecast for entire course) to revert.