Open Arsenal

Forecasts You Can Trust, Data You Can Verify.

Nimbus is an open-source global weather platform designed to deliver accurate, transparent, and feature-rich forecasting for users anywhere in the world. Built under the AGPL 3.0+ license, Nimbus focuses on giving people forecasts they can trust while allowing the public to inspect, improve, and contribute to the software. By combining multiple trusted forecasting models such as GFS, ECMWF, ICON, and regional weather sources, Nimbus aims to provide stronger accuracy than single-source weather apps.

One of Nimbus’s core strengths is its hyperlocal forecasting system. Instead of broad city-level predictions, Nimbus is designed to provide neighborhood and street-level forecasts using GPS precision, helping users understand the conditions that matter most to them. Real-time weather data includes temperature, humidity, wind speed, pressure, precipitation, radar imagery, and satellite views. Users can also receive severe weather alerts for tornadoes, hurricanes, flash floods, snowstorms, and other dangerous events.

Nimbus also emphasizes advanced visualizations and interactive tools. Users can explore live weather maps with layers such as temperature, rainfall, wind flow, cloud cover, air quality, pollen, UV index, wave heights, and snowfall accumulation. Animated radar loops, storm tracking, and 3D weather maps make it easier to understand changing conditions. Historical weather trends and climate comparisons can help users study patterns over time or prepare for seasonal changes.

Beyond forecasting, Nimbus is designed to be practical for daily life. The app can provide activity recommendations for running, hiking, biking, gardening, beach trips, and travel planning. Route-based forecasts can show weather conditions along a drive or flight path rather than only at the destination. Energy features may estimate solar panel output or wind production, while smart home integrations could automate sprinklers, thermostats, or lighting based on upcoming weather.

Because Nimbus is open source, the community plays a major role in its growth. Developers can build plugins, new map layers, analytics tools, or integrations. Users may contribute crowdsourced weather reports such as rain, hail, fog, or flooding, helping improve local awareness. With transparency, innovation, and community collaboration at its core, Nimbus aims to become a next-generation weather platform that is smarter, more trustworthy, and more useful than traditional weather apps.