PredictWind - Graphic showing expected wind strength and direction at 40metres for Friday 15 August at 1500hrs for Qingdao
www.predictwind.com!PredictWind is showing more wind for tomorrow, Friday at the Qingdao Olympics.
Racing today has been cancelled. Tomorrow all five courses will be in operation.
However www.predictwind.com!Predictwind is showing winds blowing at 12 knots tomorrow maybe more.
The actual graphs show substantially more wind however these are predictions for 40metres and to get to a five metre level which is of more interest to sailors in Qingdao and fans at home, the reading should be divided by a factor of 1.7.
Developer of the PredictWind application, and member of the Alinghi weater team in 2003 and 2007, Jon Bilger comments: 'Regarding the forecasted wind strength, as the model predicts at 40m, and the height that sailors are interested in is around 5m, and often there is a high wind gradient, you will find dividing the wind strength by 1.7 is often a good factor.'
In the graph above it can be seen that there is a high degree of variation between the Canadian feed (CMC) and the US feed (GFS) represented by the solid line.
This variation indicated the degree of uncertainty in the forecast, and if the Canadian feed is more correct then substantially stronger winds could be expected.
|Date||Hour||Speed (Knots)||Direction (Magnetic)|