Radar Gap Elimination Act

Creates a federal program to modernize the U.S. weather radar network by directing NOAA (the Under Secretary of Commerce for Oceans and Atmosphere, with the National Weather Service) to design and carry out a multi‑step replacement of the NEXRAD radar system. The agency must set performance and coverage requirements, work with the public and private weather sectors on solutions, produce a detailed replacement plan with tests and testbeds, and complete implementation by September 30, 2040.

Allows NOAA to contract with outside partners or purchase commercial radar data (“Radar‑as‑a‑Service”) to fill coverage gaps, and requires periodic progress updates to two Congressional committees. The law authorizes planning and program design actions but does not specify appropriation amounts or funding schedules.