Meteorologists have warned about North Carolina’s ‘radar gap’ for years. It’s taking a toll on forecasts.

Rotating supercell thunderstorms barreled across the North Carolina Piedmont on Saturday night, prompting tornado sirens to blare in Charlotte as three dangerous storms targeted the city. A total of 18 tornado warnings were issued for the trio of tempests as they straddled the North Carolina-South Carolina State line and tracked directly into the Queen City…