|A screencap from Windyty|
It's a website called Windyty, and if you enter your location, it will show you an animated map detailing wind direction and speed, both current and forecasted. If you want to make sure your launch field will have calm enough winds - and this has been an issue for me in the past - check this website first. It might also help you figure out the best place to set up your launch pad to ensure recovery.
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