Hi Folks
windty.com is a reworking of Cameron Beccario's
http://earth.nullschool.net
windty is an nice implementation,
particularly the metars, and maps at higher zoom levels.
It's a pity James Fallows gives Ivo all the credit.
He'd obviously not bothered reading windty's info panel.
Select an overlay, and a key displays at the middle of the right hand edge.
Click it to switch units.
ATB
Paul