Wind direction, objects

This is not technically a question about wind power, but it is about wind. If this is the wrong forum, please move this.

Is there a program that will estimate/map the direction of wind through obstacles?

For example, a wind from the due west at 45mph hits a line of pine trees 15 feet tall, then 50 feet after that, a house. What will the wind be like at the sides of the house? behind it?
I'm looking for a way to answer these sorts of questions as I design my property with winds in mind.