(rain, convective and snow) in millimeter rain gauge. Stronger winds generally means also more wind above, which could produce wind shear, destroying the thermals. Surface instability up to 200 meters above ground is generally not shown. A Day Trip from Zurich in the Swiss Countryside. 3, very good chance of sailplanes reaching the altitude of this temperature difference. We climbed further up the trail and admired the cascades falling over the rocks in various channels.