[Spooks] Sorry about the newbie question

[Justin Solonynka]

If this is totally against the rules for me to ask a newbie question 
here, I apologize and please ignore.

I just got interested in Numbers Stations (as a math teacher, I love 
numbers and codes, and when I played some recordings I found online for 
my students, they were totally creeped out - which was a bonus).

I got myself a Tecsun PL-600.  I'll be really excited if I ever get to 
hear a Numbers Station live -- at this point I'm just interested in 
hearing stations from around the world, and particularly folk music of 
other countries.

The Tecsun PL-600 came with an antenna, maybe 20 feet long(?).  My 
office is on the second floor of my house.  I've run the antenna out my 
window and attached it to a tree, diagonally from my house.

My incredibly newbie question is: Do I need to worry about lightning?  
As long as I keep the antenna unplugged from the radio during a 
lightning storm, will I be OK?  Obviously I haven't done anything to 
"ground" my antenna, but all it amounts to is a wire running from my 
window to a tree, about 12 feet off the ground. There are much taller 
trees all around the house.

Any help would be appreciated.  Thanks!  Justin