On March 8, the European Centre for Medium-Range Weather Forecasts (ECMWF) upgraded the Integrated Forecast System (IFS) with a significant reduction of the horizontal resolution of the high-resolution (HRES) and ensemble (ENS) forecasts. The upgraded horizontal resolution is now around 9 km for the HRES from the previous 16 km grid spacing. Details on these and other changes to the modeling system related to the implementation of IFS cycle 41r2 is available at the following URL: https://software.ecmwf.int/wiki/display/FCST/Implementation+of+IFS+cycle+41r2
With this significant change, we wanted to share our updated NWP reference that Shawna Cokley from WFO Raleigh maintains. The reference provides details on the run time, number of forecast hours, horizontal grid spacing, vertical levels, and output frequency along with details on how the modeling system handles convection, microphysics, radiation, initial/boundary conditions, date of recent upgrade and more. Links to the full reference as well as a basic overview reference are shown below. If you have any comments or notice any items that need attention, please let us know.