It might be worth a call to Boltek to be sure. I have a UHF/VHF dual band antenna (I am a Ham) mounted on 3 foot standoffs (actual distance is a bit lower due to brackets) and I can transmit and receive VHF OK, but lightning is much lower in frequency. There may be a bit of a blind spot in the direction of the mast from the sensor, possibly.
I would have the mast direction WRT the Boltek in a direction that you typically do not get storms from.
Here is a pic of my antenna and mounting. My apologies, but this is the best closeup I have and it was when the solar panels on my Davis anemometer transmitters were covered by snow.
I got the aluminum tubing from DX Engineering. You might want to get fiberglass for this though.
Greg H.