Beaufort wind scale
| 0 calm | less than 1 mph (0 m/s) |
|---|---|
| 3 gentle Breeze | 8 20 km/h 3.55 m/s |
| 4 Moderate wind | 13 28 km/h 5, 58 m/s |
| 5 Cool breeze | 19 24 mph 8,510.5 m/s |
| 6 Strong breeze | 25 31 mph 1113.5 m/s |
Is 20 km/h wind bad?
Sustained wind speeds around 20mph or frequent gusts of 25-30mph. No discernible threat to life or property from strong winds. Sustained wind speeds are non-threatening wind conditions that may still exist. Note: In strong winds, small branches detach from trees and loose objects are blown away.
Are 20 mph winds strong for airplanes?
Strong surface winds – 20 MPH or more – can make the launch bumpy, but only for a minute or two. Check the percentage of precipitation. Thunderstorms in the area could make the climb bumpy.