Change to Wind Speed and Wind Direction observations?

[Michael Adams]

Hi, 

I have been collecting observation data over the past few days as part of a project at university. Over the weekend it stopped working and I have discovered that most Wind Speed and Wind Direction observations are no longer available, apart from the most recent two hours. Can anyone explain why this might be the case, and if this is a permanent change?

I have attached a screenshot of the XML. 

Thanks

Michael