The current settings of WPS/WRF are such that the initial state of the model (initial wrfout files) has no hydrometeors. This greatly affects the initial forecast moisture fields, and results in unrealistic precipitation forecasts for the first several hours of the simulation (long spin-up time). This seems especially bad for a tropical setting.
Describe the Enhancement
Modify the WPS or WRF settings (or both) in order to include hydrometeors in the initial conditions.
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The current settings of WPS/WRF are such that the initial state of the model (initial wrfout files) has no hydrometeors. This greatly affects the initial forecast moisture fields, and results in unrealistic precipitation forecasts for the first several hours of the simulation (long spin-up time). This seems especially bad for a tropical setting.
Describe the Enhancement
Modify the WPS or WRF settings (or both) in order to include hydrometeors in the initial conditions.
This may be as simple as modifying the VTABLE, per this wrfhelp forum post: https://forum.mmm.ucar.edu/threads/resolved-using-hydrometeor-mixing-ratios-in-gfs-metgrid-error-in-ext_pkg_write_field.8644/
There is literature that indicates this significantly reduces spin-up time (improves short-term forecasts): https://ui.adsabs.harvard.edu/abs/2020AGUFMA183.0007L/abstract
Time Estimate
1 day
Sub-Issues
Consider breaking the enhancement down into sub-issues.
Relevant Deadlines
NONE
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feature_<Issue Number>/<Description>feature <Issue Number> <Description>