I have a couple of suggestions for them.
1. When you're looking at the map, the station that's providing the weather conditions should have that green "halo" like on the other WU meso-map.
2. Because mine is only 750px wide, the maps options (Map, Sat, Terrain) is partially hidden behind the Temp, precip, clouds buttons.
3. It would be nice to either specify the size of the Current Conditions box or have it auto-size based or the size of the window.
I'm sure I could come up with a few more but overall, it's pretty slick.