How would you report an average wind speed of 25 knots that is varying rapidly between 20 and 30 knots?

In this scenario, the average wind speed is 25 knots, but the wind is also characterized by gusts reaching up to 30 knots. Reporting this information accurately is essential for aviation safety and weather monitoring.

The correct choice indicates the average wind speed followed by the maximum gust speed, which is typical in aviation weather reports. Stating "25G30" conveys that the average wind speed is 25 knots with gusts up to 30 knots. This provides vital information for pilots and others who need to understand not just the average conditions, but also the potential for sudden changes in wind speed that could affect flight operations.

Other formats presented in the choices do not comprehensively communicate both the average wind and the variability indicated by gusts. While the 25 and WND 20V30 remark provide information about variation, they do not present a clear maximum gust speed in relation to the average. Therefore, using the format of average wind speed followed by maximum gust speed is the most efficient and correct way to report this situation.