North Warning System

North Warning System
Active1988–present
CountryCanada & United States
BranchRoyal Canadian Air Force
United States Air Force
TypeEarly-warning radar
RoleContinental Air Defense
Part ofNorth American Aerospace Defense Command
Garrison/HQCFB North Bay
Joint Base Elmendorf-Richardson

The North Warning System (NWS, French: Système d'alerte du nord) is a joint United States and Canadian early-warning radar system for the atmospheric air defense of North America. It provides surveillance of airspace from potential incursions or attacks from across North America's polar region. It replaced the Distant Early Warning Line system in the late 1980s.