Wind Load Calculation on an Antenna Radome

Google it

http://www.google.co.uk/search?q=wind+loading+on+antennas&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=2RL-TP60JNGYhQfTjpHgCw

http://www.google.co.uk/search?q=wind+loading+on+radome&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=EBP-TKmlKcmAhQfO-72-Cw

Any Good ?

Alternatively AS1170 if you are in Australia.

search in the sustainable engineering section (linkt at right hand side) and you will see some discussion on how the wind load calculation. It was for a solar panel installation (ground mounted) but will be applicable to your case. Principle is the same.