"Anthony
There should by hourly forecast for race day. Now, there is a forecast saying "Heavy Rain - 90% chance, humidity 70%" and in the race it is 30 degrees without a hint of cloud. Weather forecasting could definitely be improved.
Because the forecast is for the 24hour period... the live weather is shown when your doing your setup/strategy [and also in race] depending on what time the race is at the forecast could be totally irrelevant