The terms “wind speed” and “wind gust” are both related to the movement of air, but they refer to different aspects of the wind’s behavior. Here’s the difference between the two:
- Wind speed refers to the average speed of the wind over a specified period, typically measured in meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), or knots (nautical miles per hour).
- It represents the constant or steady flow of air in a particular direction, measured over a specific time interval, such as one minute or ten minutes.
- For example, if the wind speed is reported as 20 km/h, it means that the average speed of the wind during the measurement period was 20 kilometers per hour.
- A wind gust is a sudden and brief increase in wind speed above the prevailing or average wind speed.
- Gusts occur over a short period, typically lasting a few seconds to a minute, and can be significantly higher than the steady wind speed.
- Wind gusts are caused by temporary changes in atmospheric conditions, such as a sudden increase in the pressure gradient, the passage of a weather front, or the effects of local topography.
- For example, if the wind speed is reported as 20 km/h, but a gust of 40 km/h is mentioned, it means that the wind briefly accelerated to 40 kilometers per hour, which is twice the average wind speed, before returning to its normal speed.
In summary, wind speed refers to the average speed of the wind over a specific time period, providing a general sense of how fast the wind is blowing. On the other hand, wind gusts represent sudden and temporary increases in wind speed, providing information about short-lived bursts of stronger winds that can have significant impacts, especially in terms of weather phenomena and their effects on the environment and human activities.