What does a wind rose diagram illustrate?

What does a wind rose diagram illustrate?

• A. A diagram showing the relative frequency and direction of wind loading.
• B. A chart of humidity levels.
• C. A map of rainfall amounts.
• D. A graph of wind speed over time.

Answer: (A)

A wind rose diagram shows where winds come from and how often they blow from those directions, often grouping wind speeds into categories. The diagram uses a circular layout with compass directions around the edge, and the length or shading for each direction reflects the relative frequency of winds from that direction (and sometimes the speed ranges). This is why it’s the best choice for understanding wind loading on a site or structure—knowing both direction and how often winds occur from each direction helps assess exposure and design considerations. It isn’t about humidity, rainfall, or a time-based record of wind speed, which would be shown by separate charts or maps.

A wind rose diagram shows where winds come from and how often they blow from those directions, often grouping wind speeds into categories. The diagram uses a circular layout with compass directions around the edge, and the length or shading for each direction reflects the relative frequency of winds from that direction (and sometimes the speed ranges). This is why it’s the best choice for understanding wind loading on a site or structure—knowing both direction and how often winds occur from each direction helps assess exposure and design considerations. It isn’t about humidity, rainfall, or a time-based record of wind speed, which would be shown by separate charts or maps.