# WindBorne Systems

WindBorne Systems operates the world's largest weather balloon constellation and builds AI-powered weather forecasting models. Our Global Sounding Balloons autonomously navigate the atmosphere for weeks, collecting observations over oceans and remote regions where no other data exists. Our AI model, WeatherMesh, fuses this proprietary data with other sources to produce forecasts that outperform traditional numerical weather prediction.

## Sitemaps

- [Sitemap Index](https://windbornesystems.com/sitemap.xml): Index of all sitemaps
- [Website Sitemap](https://windbornesystems.com/website-sitemap.xml): Marketing and blog pages on windbornesystems.com
- [Weather Sitemap](https://windbornesystems.com/weather/sitemap.xml): 25,000+ city forecast pages
- [API Documentation Sitemap](https://api.windbornesystems.com/sitemap.xml): All API reference pages

## Weather Forecasts

Free city-level weather forecasts for 25,000+ cities worldwide, powered by WeatherMesh-6.

- By city name: `https://windbornesystems.com/weather/{country}/{city}/`
- By coordinates: `https://windbornesystems.com/weather/{latitude}/{longitude}`
- Query parameters: `https://windbornesystems.com/weather/?lat={latitude}&lon={longitude}`
- JSON API: `https://windbornesystems.com/weather/{country}/{city}/forecast.json`

## Weather Data API

- [API Documentation](https://api.windbornesystems.com/): Full API reference, authentication, endpoints, and SDKs

## Products

- [Observations (Atlas)](https://windbornesystems.com/products/observations): Global balloon data
- [Forecasts (WeatherMesh)](https://windbornesystems.com/products/forecasts): AI weather models
- [Solutions](https://windbornesystems.com/products/solutions): Custom weather intelligence
- [Energy Trading](https://windbornesystems.com/products/energy-trading): Forecasts for energy markets
- [Utilities](https://windbornesystems.com/products/utilities): Weather intelligence for utilities

## Key Blog Posts

- [WeatherMesh-2 Technical Blog](https://windbornesystems.com/blog/weathermesh-2-technical-blog): Architecture, performance, and evaluation of WindBorne's AI weather model
- [WeatherMesh-3: Fast and Accurate Operational Global Weather Forecasting](https://windbornesystems.com/blog/weathermesh-3-fast-and-accurate-operational-global-weather-forecasting): Operational forecasting advances in WeatherMesh-3
- [How We Built Our Record-Breaking AI Model, WeatherMesh](https://windbornesystems.com/blog/how-we-built-our-record-breaking-ai-model-weathermesh): Technical background on WeatherMesh

## Company

- [Home](https://windbornesystems.com/)
- [Mission](https://windbornesystems.com/mission)
- [Blog](https://windbornesystems.com/blog)
- [FAQ](https://windbornesystems.com/faq)
- [Careers](https://windbornesystems.com/careers)
- [Contact](https://windbornesystems.com/contact)
- [Press](https://windbornesystems.com/ext/press)