Futuresource energy station has a nice drag down menu of weather decision tools for a reasonable price. Other than that, weather.com, NOAA, NHC, and intellicast.com
I believe Centaurus Energy, the most successful Energy Hedge fund ever uses www.wsi.com Also, check www.customweather.com.
BTW, is there any good book written on this subject on how to make energy bets based on weather patterns? Thanks!