“High Resolution Rapid Refresh”— The HRRR model is run every hour, with a very high resolution of 2-3 kilometers. It takes about 1.3 hours to almost 2 hours (for the 48 hour forecast runs) for for each model to be computed and become available.
The HRRR is one of several new “Convection Allowing Models”. (referred to as CAM models). It has specific physics for the parameterization of convection (thunderstorms).« Back to Glossary Index