1.1      The Weather Research and Forecasting Model: 2019 Annual Update.

Dudhia, Jimy, Mesoscale and Microscale Meteorology Laboratory, National Center for Atmospheric Research

In April 2019, Version 4.1 of WRF was released. This included new and updated physics options. For microphysics, there is a new particle-habit predicting scheme called Jensen ISHMAEL, and also new options WSM7 and WDM7 that include hail, as well as a new 4-ice Goddard microphysics option. NASA Goddard has also updated their radiation scheme in this version. There is also a new shallow convection option called the Deng scheme that was developed for the WRF-Solar project and is now generally available. There is a new physics suite defined as 'tropical' that is shared between WRF and MPAS. Memory use for the urban options has been made more efficient. Bug-fixes include one for the LES option that was added in V4.0.3 to treat surface moisture fluxes consistently with theta_m, and a fix for ozone in V4.1 that had a problem with time-interpolation from the monthly climatology. More details can be found at https://github.com/wrf-model/WRF/releases.