Thunderstorm cell moving across a field

Strong Wind

Strong Wind consists of damaging winds, often originating from thunderstorms, that are classified as exceeding 58 mph.

In the National Risk Index, a Strong Wind Risk Index score and rating represent a community's relative risk for Strong Wind when compared to the rest of the United States. A Strong Wind Expected Annual Loss score and rating represent a community's relative level of expected building, population, and agriculture loss each year due to Strong Wind when compared to the rest of the United States.

A map of the United States colored by Strong Wind Risk Index ratings. Strong Wind risk is possible and prevalent across the United States with concentrated risk in the Midwest. For full results, see the National Risk Index Map webpage.

Strong Wind Exposure

A Strong Wind exposure value represents a community's building value (in dollars), population (in both people and population equivalence), and agriculture value (in dollars) exposed to Strong Wind.

Strong Wind Annualized Frequency

A Strong Wind annualized frequency value represents the average number of recorded Strong Wind hazard occurrences (events) per year over the period of record (32 years).

Strong Wind Historic Loss Ratio

A Strong Wind historic loss ratio is the representative percentage of the exposed consequence type value (building, population, or agriculture) expected to be lost due to a Strong Wind hazard occurrence.

Strong Wind Processing Methodology

For comprehensive details about the Strong Wind processing methodology, see the National Risk Index Technical Documentation.