Dear Sirs,
As a new member of the 'windytv community', I appreciate what you say about not having enough staff to upkeep historical data.
However, surely it doesn't need that many people to upkeep what amounts to Weather Records? Have you thought about outsourcing the work?
My concern is that you will lose out to such Weather Sites as Metcheck and Weather Underground, who not only have accurate, localised forecasts, like yourselves, but also maintain historical data on a daily or even hourly basis.