
Post by
BooBill | 2020-11-24 | 18:13:13
My conclusion of what happened with the 00Z update (last night for us in NA) was that 00Z had the frontal line slow, so that it was behind where it was forecast to be in prior 18Z update.
For those of us that had just crossed the line, it appeared in the game to be a meteorological impossibility, a front backing up. Artifacts in the interpolation caused wind shifts of 45 degrees from one 10 minute refresh to the next. Zezo missed all this, since it used the old forecast for the first hour of the update and by the time it switched to the new, the issued had passed and everything synced up.
While a front backing up can't happen in real life, because we are sailing between forecasts of future wind, it can. If the progression of a front slows and you have reached the point where it was earlier predicted to be, it would appear to back up and you have to cross it again.
Not sure what your experience was over where you are YM, but for the tight pack I'm in it was a tonne of fun that kept me up till 2am. Some team mates who had gone to bed before the 00Z update started with TWA set, found themselves 100 miles off course this morning.