We have been in discussions with Nottingham City Council and following the meeting we can update you as follows:

“In the event of adverse weather and high winds (40mph +) alternative car parking arrangements will be in force. We strongly advise all visitors to arrive early in time for their race and to be prepared to be re-directed.
The Council will utilise alternative areas not normally used for parking and they are currently trying to secure additional off site parking.
Please be patient at all times, the organisers are working hard to ensure the event goes ahead”.

Clearly it will not be cancelled because of the state of the course but parking safely is very important. We suggest you plan to get to Nottingham a good bit earlier than you would normally.
Please keep looking for updates, as late as Saturday morning.