HORIZON SYSTEMS

Welcome, storm watcher, to the official home of Horizon Systems, a free desktop radar viewer built for people who take severe weather seriously. Written from the ground up in C++ and Qt6, Horizon Systems pulls live Doppler radar, lightning, and alert data from dozens of national networks across Europe and North America, right onto your desktop.

Currently in pre-release testing: V 1 . 1 . 1

No subscriptions. Free for personal use, no accounts required to get started.

DISCLAIMER: Horizon Systems is not an official warning service. Always consult the responsible national meteorological authority for official watches, warnings, and advisories.

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Horizon Systems is an independent, small-team engineering project, currently in active pre-release development. It is built in C++ and Qt6 by a handful of storm chasers and developers who wanted better radar tooling. The project is not affiliated with any national meteorological agency; where live network data is used, we work directly with data providers to respect their access and redistribution terms. See the Partnerships page for details on how agencies and data providers can review or enable integrations.

• NEXRAD Level II and European ODIM HDF5 radar support
• National radar clients: FMI, DMI, MetNorway, MeteoFrance, and more
• NWS zone based alert rendering with clickable polygon detail
• Live Blitzortung lightning strike overlay
• Automatic IP based geolocation centering
• "ResolvIT 2.0" bilinear interpolation smoothing engine
• Hotkeys, contributor credits, and a proper watermark, because we are professionals