Wind
Steady winds straight down the runway present no problem, if anything they make it easier to takeoff and land. Winds blowing across the runway are a different matter; difficult crosswind landings are something every pilot respects. Coming home yesterday I landed in a 10-14kt crosswind at San Carlos, but it took me 3 tries.
The biggest problem with strong winds is they’re seldom steady. If a wind is 10kt gusting 20kt, your airspeed may suddenly drop 10kts in a lull. That can be a problem if you’re flying slow near stalling speed. And gusty winds require active flying to stay pointed the right way. San Carlos has a bunch of mechanical turbulence from the wind swirling around the buildings near the runway. Crosswinds there don’t just mean a static correction, you have to sit up and dance fast on the controls like you’re playing a videogame. It’s kind of fun but very demanding.
