Yes, in the winter last weekend. Mt Rogers (highest in VA) is notorious for high winds (60+) and extreme weather shifts (temp drops of 30ºF in a couple of hours). Lots of news stories of people getting in serious trouble up there in prevous winters including a couple of entire scout troups ending up in the hospital.
This weekend, it was forecast to be quite mild by Mt Rogers winter standards, so several of us decided to take our lightweight shelters. I had my new MLD SuperFly, one person had a Golite Shangri-La 1, and two had TT Rainbows. The rest took heavier double-wall tents. I had my Superfly pitched down to the ground and used all the optional tie-outs.
Friday night was quite mild. We were at 4500 ft in the valley below Scales, so were a bit sheltered. We had winds 15-20 mph gusting to 30 mph and a low of 35. The SuperFly hardly moved and none of the others had any problems as well.
Saturday night was much more of an extreme test. We were on the highest ridge line at 5400 ft and a storm system was approaching (the same one that caused a bunch of tornados in the Southeast yesterday) and conditions deteriorated during the night. Around 8 pm the clouds lowered so that we were inside them and the wind began to kick up. Most of the night we had winds of 30-40 with gusts in the 50-60 mph range and bursts of horizontal freezing rain and ice, which sounded like machinegun fire hitting the spinnaker at high speed. The SuperFly definitely had some deflection under the high gusts (looked like about 4" at the ridge line), but never so much that I was worried about it. In the morning, the poles were not quite at the same angle as when I set it up, but it was still solid and all the stakes held. It was very nice to be able to pack up completelty inside the shelter before heading out into the storm and pull up the shelter and stick it into the back pocket of my Starlight. The Shangri-La 1 also made it throught the night without any significant problems (just a little misting, normal for silnylon). The two people in the Rainbows had a significant amount of water get in, however. They believe the high-speed horizontal freezing rain got in through the mesh.
When we were hiking out in the morning (packed up at 6:30 and hit the trail at 7 so we could get off the mountain before it got even worse since the main body of storm hadnt arrived yet), the wind gusts were strong enough that you sometimes got staggered sideways a step or two before you could recover and visibility was about 20 ft. All in all, it was definitely an experience and I was very happy with how the SuperFly performed.
Tim

