How is a wind speed of 20 knots recorded in column 4 of an observation?

In the context of wind speed reporting, the correct method to record a wind speed of 20 knots is simply to write it as "20" in column 4 of an observation. This standard format is used for clarity and consistency in aviation weather reporting.

Recording wind speeds involves using a straightforward numeric indication to represent the speed in knots, where the value directly reflects the wind speed measured. It is essential for pilots and meteorologists to understand these formats accurately to ensure proper interpretation of the data.

Using a leading zero, like "02," is generally not applicable as it implies a speed of 2 knots rather than 20 knots. Writing it in a three-digit format as "200" is misleading because it suggests wind speeds of 200 knots, which is unrealistic for typical operational conditions. Conversely, decimal formats such as "2.0" misrepresent the actual speed significantly and are not appropriate for this kind of straightforward measurement.

Thus, stating "20" correctly conveys the intended wind speed for the operational context in aviation weather reporting.