Off Topic - Application to save daily web data??

Greetings,

While off topic, my application is soaring related.

Does anyone know of an application that would automatically load and
store web data.

What I'd like to have is the daily unysis data saved so that I could go
back and review any date's forecast.

http://weather.unisys.com/gfs/6panel...es_6panel.html

For example, I go fly on Saturday and it's just awesome. I want to
better predict what the conditions that lead up to this were. So I go
back to the forecast images from the preceding week that were
automatically stored so that I can review and then be better prepared in
the future to anticipate great soaring weather.

To do this, it would be great to have an application that would load
URLs automatically at a pre-set interval that would save each day's data
in a logical format.

Anyone know of something like this?

Thanks,

Gary