Currently, shortly after the start of the eNordstream race, I'm seeing huge discrepancies between the game wind (which matches Zezo expectation) and the expected wind displayed in Wind.com (GFS model) and a grib that I downloaded from VLM (file: gfs_NOAA-2021031206.grb).
In the grib, I'm looking at 10m wind map with a resolution of 0.5 x 0.5 and 3h step.
The difference is really quite large, 18.3knts @ 235 in game, 15.4knts at 234 in grib.
Am I looking at the wrong grib, or is there a data problem somewhere?

Post by
BooBill | 2021-03-13 | 13:48:38
Thanks guys. So, in http://zezo.org/grib/gribv1/all.grib it appears you are splicing together the fresh partial update with the previous forecast, so that it's always the full 16 day forecast that you are using. Is that correct Cvetan? I think you said earlier you switch from the old after a set period (1hr?) to the new (without interpolation), till the end of what's downloaded, then back to the old to the end of the 16 day period.
That works great for me. What I'm looking to do is replicate as close as possible what you and the game are doing for the short term, then apply some alternative models for the medium and long term to look at alternative strategies.