Wind Speed Volatility
Volatility of wind speed is obviously an issue.
Imagine a wind expertise recommending a location based on historical data from 1990 until 2012, park is built in 2013/14 and becomes operational in 2016.
Particularly if project is highly leveraged such a 'bad start' might quickly eat up any reserves in project's financial set-up.
=> That's weather risk and that's why it makes sense to look at this even before operation starts