I'll readily admit to being a bit of a weather geek, but this thing is mesmerizing...it almost seems like I can sit and watch this thing for hours.
http://hint.fm/wind/
Another one of my favorites, but I remember seeing someone link to it before.
http://radar.weather.gov/Conus/full_loop.php
I also love the water vapor loop
http://www.ssd.noaa.gov/PS/PCPN/DATA/RT/na-wv-loop.html
And lastly the NOAA image of the day
http://www.nnvl.noaa.gov/imageoftheday.php
http://hint.fm/wind/
Another one of my favorites, but I remember seeing someone link to it before.
http://radar.weather.gov/Conus/full_loop.php
I also love the water vapor loop
http://www.ssd.noaa.gov/PS/PCPN/DATA/RT/na-wv-loop.html
And lastly the NOAA image of the day
http://www.nnvl.noaa.gov/imageoftheday.php