Series promoter Dorna took the decision at around 12.30pm local time on Sunday, half an hour before the 13-lap race was due to begin.
It followed a chaotic Moto2 race which was red-flagged after just nine of 23 laps completed in the wet and windy conditions, which had been forecast from the beginning of the weekend.
Organisers took the decision on Friday to move the main race of the weekend to Saturday, and this race duly took place without incident, with Johann Zarco emerging as a first-time premier class winner.
MotoGP warm-up was held safely on Sunday morning at 9am, with Maverick Vinales setting the pace on his Aprilia, while the Moto3 race was also run in its entirety, albeit in heavy rain.
However, the wind increased in speed and changed direction ahead of the Moto2 race, making for a treacherous contest that resulted in 10 of the 30 riders…
