What causes wind on top of hills?
The air over the hill top is now warmer than the air at a similar altitude around it and will rise through convection. This creates a lower pressure region into which the air at the bottom of the slope flows, causing the wind.
Are mountains always windy?
Winters see less of these thermal gradients and in general winds will be limited to higher altitudes where they blow pretty consistently. In both of your scenarios, however, winds blow pretty consistently at higher elevations….which is why wind farms are typically found there.
Is wind stronger in the mountains?
Ridge lines of mountains get even more wind, he said, with Mount Washington in New Hampshire holding the record for directly measured surface wind speeds, at 231 miles per hour. But such extremes are mostly found in the higher mountains, around 6,000 feet and above, closer to the jet stream.
How does wind interact with mountains?
The wind pushes air, and clouds in the air, up the mountain slopes. … Dense masses of warm, moist air that move up and over a mountain swell as the air pressure confining them drops away. The air becomes colder in the same way as a pressurized spray can’s contents become colder when the can’s pressure drops rapidly.
Does wind go up or down a mountain?
Mountain winds blow from mountain towards valley after sunset, when mountain cools down and valley zone is comparatively warmer. While valley breezes occur when the warm air rises up the sides of the valley, warm air in a mountain breeze will rise up the middle.
Where is the calmest weather?
These Are the Places with the Best Weather in America
- Jackson, Kentucky. 1/20. …
- Wallops Island, Virginia. 2/20. …
- Oklahoma City, Oklahoma. 3/20. …
- Vero Beach, Florida. 4/20. …
- Hilo, Hawaii. 5/20. …
- Cape Hatteras, North Carolina. 6/20. …
- Santa Maria, California. 7/20. …
- Miami, Florida. 8/20.
Why does mountain weather change so quickly?
This happens because as altitude increases, air becomes thinner and is less able to absorb and retain heat. The cooler the temperature the less evaporation there is, meaning that there is more moisture in the air. Air pressure decreases with altitude.
Why are winds faster at higher altitudes?
Going up in altitude, the pressure gradient between the warm air and the cold air increases with height. … The influence of this friction is less with height above the ground, thus the wind speed increases with height.
Can you walk in 30 mph winds?
Walking in a 30 mph wind can be tricky, at 40 mph you could be blown off balance and at 60 mph it is almost impossible to walk. The wind speed given by the BBC or local radio station will be at sea level. … At 900m above sea level the wind could be blowing about three times stronger than at sea level.
Can you walk in 60 mph winds?
Walking will be arduous. … Attempting to walk in 60-70mph winds is dangerous, and there is a high risk of being blown over and suffering injury. Stay away from difficult underfoot conditions or exposed edges and get off the hill as soon as possible.
What wind speed will lift a human?
Knocking you down would take a wind of at least 70 mph. The terminal velocity, which is the wind speed (falling speed) where the force of the wind equals the force of gravity, for a person is about 120 mph — that would likely knock you down.