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    Error in TWOSTREAM subroutine (module_sf_noahmplsm.F)

    Hi everyone, I am running WRF4.2.2 at urban scale (1km) after having successfully completed the simulations for the parent domains D01 and D02 (15km and 5km). Unfortunately, in one of my urban domain I get a segmentation fault after 6 hours from the beginning of the simulation. Playing with...
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    Large difference between NOAH and NOAH-MP

    Dear WRF users, I am running WRF 4.2.2 to examine the impact of urbanization on surface climate; I apply ndown in a triply-nested domain to downscale ERA5 from 15 km to 1 km. I am using the corine landcover to define the different urban categories, while for the 1 km domain I use the BEP model...
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    Issue with corine land cover

    Hi All, I am trying to use the corine land cover in WPS, but after following the steps suggested in the user guide, the geo_em has a constant LU_INDEX and does not display any LANDUSEF. These are the steps I did to process the data: 1) Downloaded CLC from this link...
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    WRF4.3.2 crashes while writing output

    Hi all, I am having some issues running WRF V4.3.2 with MOZART-MOSAIC chemistry (chem_opt = 201). The simulation starts correctly and works fine until the model attempts to write wrfout. In particular, when reaching the history_interval the simulation crashes without any message. Playing a bit...
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    WRF4.3.2 crashes while writing output

    Hi all, I am having some issues running WRF V4.3.2 with MOZART-MOSAIC chemistry (chem_opt = 201). The simulation starts correctly and works fine until the model attempts to write wrfout. In particular, when reaching the history_interval the simulation crashes without any message. Playing a bit...
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    Large precipitation bias after ndown

    Hi, I am using ndown to generate boundary conditions for a finer simulation. The coarser domain generally well reproduces the reference data but the precipitation of the nested domain is heavily overestimated (please look at the attached figures). The ndown namelist and the run namelists are...
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    Large winter cold bias over Europe

    Hi all, I'm currently running some hindcast simulations over Europe using WRF V3.8.1 driven by ERA-Interim and I have a very large cold bias (> 6C) during winter in the North Eastern part of the domain (see figure). I tried several different configurations changing the land surface scheme as...
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    Too strong wind speed

    Hi, I am forcing WRF with ERA-Interim data for a real-case simulation over Europe. Compared to ERAI, I noticed the model simulates too strong surface wind speed (10m) over Gibraltar strait (please see attached for example). This issue then gets progressively worse in the nested domain. I tried...
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    Troubles, could not find trapping x locations

    Hi all, I am using WRF4.2 to downscale CMIP6 data and I get the following error while running real.exe: -------------- FATAL CALLED --------------- FATAL CALLED FROM FILE: <stdin> LINE: 5868 troubles, could not find trapping x locations -------------------------------------------...
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    (RESOLVED) Issue writing daily carbon fluxes (GPP & NPP) in Noah-MP

    Hi All, I am facing an issues with Noah-MP: when I set the history frequency to 1 day, the variables GPP and NPP are always 0, while when the history frequency is 3h or 6h they are correctly saved and displayed in wrfout. Any suggestion on how to fix this bug keeping the history frequency at 1...
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    (RESOLVED) ungrib not reading 00 UTC time stamp

    Hi all, I am trying to use MPI-ESM data to force WRF, so I prepared the surface and pressure grib files and created a new Vtable. When I run ungrib, I noted that dates are not read correctly; in particular, for each day, ungrib does not find/read the date at midnight (1980-01-02 00:00:00...
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    Different results between adaptive time step and constant dt

    Dear All, I am running WRF3.8.1 for some hindcast simulations and I am getting different results between a simulation with fixed dt and a simulation using adaptive time step. I do not expect to get identical bit-to-bit results, but differences are quite large for both surface air temperature...
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    Adaptive time step & time-step precipitation

    Hi, when using the adaptive time step which dt I have to use to convert the time-step precipitation (i.e. RAINCV and RAINNCV) into a rate at the end of simulation? Thanks, Alessandro
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