
Post by
zezo | 2016-11-14 | 16:46:35
I download the winds from NOAA at 4,10,16,22h UTC at which times there are about 100h worth of forecast. The other 100 hours come a hour later - 5,11,17,23Z
The game seems to mirror the winds as soon as they come out from NOAA but it's not clear when the new data starts affecting your boat.
What I'm doing is to start with the +6h GFS. The timeline goes something like that (same for the other three 6-hour periods):
12-15h UTC - wind is interpolated between the 6Z+6 and the 6Z+9 models *corresponding to 12h and 15h actual time.
15-18h UTC - wind is interpolated between 6Z+9 and 6Z+12
18h UTC - 6Z+12 is replaced with 12Z+6, so the wind is interpolated betwwen 12Z+6 and 12Z+9 (with 12Z+6 being available as forecast starting from 16h)