MMMmmmmm.....
OK quick lesson on aircraft structures......
The "hard points" on wings of the drone with the USFS and NOAA logos I am looking at on that site are the actuators for the flight controls.
http://wallbase.cc/search/tag:18339 (I can't open the original link from work.)
They are covered for better air flow around the attach points so there isn't as much drag. The large dorsal pod is more than likely a radar mapping set up. Devices like that can be used to track storm activity (cell movement and strength), terrain changes, and in case of fire the heat signature, direction and debris mapping. The NOAA and NFS also use a millimeter wave motion tracker radar to track fishing vessels or other animal movements.
The ones with weapons hardpoints on them are USAF.