There have been many times I've wished I could know what the exact wind speed was at a launch but just had to guess. At the last SEARS launch Jack Kale had a pocket wind gauge that was really cool. It gives wind speed, average speed and maximum gusts as well as temp & wind chill, all with a quartz display.
Last Friday morning I ordered one from the website of Outdoor Sports at the link below. I got it today! If you ever wanted an inexpensive way to know the wind speed on the spot, this is it.