The National Oceanic and Atmospheric Administration’s began nationwide use of a new weather model Sept. 30. NOAA says the High-Resolution Rapid Refresh model will help weather forecasters will be able to pinpoint neighborhoods under threat of from severe weather and warn residents hours before a storm hits. It will also help forecasters provide more information to air traffic managers and pilots about hazards such as air turbulence and thunderstorms. Credit: U.S. National Weather Service