Perhaps you could show a log page from a hurricane and put in a bit of the historical stuff - e.g. Halifax fire, Jutland, Falklands and point out that during the battle the temperatures and wind direction are recorded and immediately afterwards, during the clearing up, pressure readings resume.
Maybe a page from one of the arctic ships showing the conditions that those sailors endured might go down well.
Can you nick one or two of the animations from the blogs, that fog of uncertainty one is illustrative, and point out that that one was early in the project.
Stress that this data will be available for the foreseeable future, worldwide and can be used for climate modelling and, in some cases (probably ports), extra data for the study of local weather trends.
Have fun and enjoy the day