Windy conditions aren't necessarily a reason to stay grounded; you have to judge the "quality" of the wind. Our runways here in Nebraska tend to run north/south due to the prevailing winds, so a 30 mph wind is actually flyable so long as it is steady and blowing consistently from the north or south. I went to a club fun fly in SW Iowa when the prevailing winds were 25 to 30 mph straight out of the south. A bunch of us flew, and there were no crashes. My Goldberg Tiger 2 had to be flown at full throttle upwind, but flew well.

On the other hand, gusty wind conditions where speed and/or direction vary can be much more hazardous to your plane. I was flying my Tower Trainer last fall on a day with gusty wind conditions. The wind died down significantly as I was making my approach, so I cut my throttle way back and was gliding in for a nice landing down the middle of our asphalt runway. I was about 10 foot above the deck and just a click or two above idle on the throttle when a big gust came up out of nowhere. It caught the wing on my trainer and popped the plane straight up, then proceeded to flip it over upside down and backwards onto the runway.

Fortunately my wife was there to capture my moment of glory on camera!