Recent content by wallis

  1. W

    Positive temperature bias in results after switching to WRF 4.4 using NoahMP

    It's independent of the LSM - see left with RUC, right with Noah(not MP). These charts are both showing (T2 WRF 4.2) - (T2 WRF 4.4) Significant positive and negative biases, +2c degrees through the bay area and -2 degrees through the great lakes.
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    Positive temperature bias in results after switching to WRF 4.4 using NoahMP

    I have also now tested two forecasts, one in US and one in Europe, 4.2 vs 4.4, same namelists, both using Noah (not MP!), and saw 0.2c higher temperature on average and about 2% lower humidity. Interesting...
  3. W

    Positive temperature bias in results after switching to WRF 4.4 using NoahMP

    Why not repeat your test with 4.3.1 and 4.4 with a different LSM to confirm?
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    Obs nudging - Unknown regime type 0.0

    Nudging config: obs_nudge_opt = 1,1, max_obs = 190000, fdda_end = 6000,6000 obs_twindo = 0.6667,0.6667 obs_ipf_errob = .true., obs_nudge_temp = 1,1, obs_nudge_mois = 1,1, obs_nudge_wind = 1,1, obs_coef_temp = 6.E-4,6.E-4, obs_coef_wind = 6.E-4,6.E-4, obs_coef_mois =...
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    Obs nudging - Unknown regime type 0.0

    Unknown regime type 0.0 at grid coordinate i = 96 j = 505 -------------- FATAL CALLED --------------- FATAL CALLED FROM FILE: <stdin> LINE: 476 fddaobs_driver: compute_VIH STOP ------------------------------------------- I get this error very often with observation nudging, does...
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    Nesting boundary over mountainous terrain

    I did find that disabling DFI and going back to the default advection order reduced the CFL, allowing it to finish with a slightly higher timestep, but the discontinuity is clearly still there in the charts just the same, see W and T2 Any ideas?
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    Nesting boundary over mountainous terrain

    Sorry for the delay in performing those tests. Results: Changing to d01 still crashed in the same place, subsequent tests have been run with this as it's much quicker. epssm to 0.5 still crashed Increasing spec_exp/relax_zone made it crash faster Changing to real-defined eta_levels still...
  8. W

    Nesting boundary over mountainous terrain

    See attached some ncview charts from this region prior to the crash.
  9. W

    Nesting boundary over mountainous terrain

    Those points geographically are over flat land - isn't it suspicious that they're consistently occurring near the domain edge? I will try epssm - are there side-effects to this? Would adjusting spec_exp or relax_zone achieve anything?
  10. W

    Nesting boundary over mountainous terrain

    All of my errors are like this (~8-12 points from the boundary), but not all of my runs are errors. About 20% of my runs on real data are failing. I thought it was always over mountainous terrain, but here it's actually quite a few gridpoints away, and happening in the outer domain, but still...
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    Nesting boundary over mountainous terrain

    I get errors like this, always L=1, usually but not always I,J on the boundary between WARN5: NaN temperature; I,J,L,P= 465 95 1 59.02021 WARN1: Water saturation T<180K; I,J,L,TC,P= 463 40 2 -93.15373 76.89545 WARN5...
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    Nesting boundary over mountainous terrain

    Hi, I would like to do a high resolution (2-3km) forecast for the Sierra's, nesting down from GFS->~9km->~3km. Because the Sierra's are so large it is not possible for me to place the inner domain border entirely away from mountainous terrain, it has to cross somewhere, and it's always on this...
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    3D radiation

    GHI, ideally DHI/DNI as well.
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    3D radiation

    Are there any radiation modules that output 3D radiation, to be used to calculate solar irradiance at altitude? The goal is to calculate solar power for an aircraft in flight.
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    Poor results with NoahMP versus Noah

    I analysed both domains against observations from GDAS, comparing the average/median/stddev error. But I can also just load up all kinds of subsequent parameters and see subsequent catastrophically wrong results, like PBLH being nearly zero across large areas at the height of summer. Surface...
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