Straight-line Wind

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HazardHub Damaging Straight-line Wind Risk

The HazardHub Damaging Winds Risk File is part of the Convective Storm Suite which also includes Lightning, Hail, and Tornados.

During the period 2006-2015, damaging winds caused $180 billion in total losses and $124 billion in insured losses for a 10-year average of $12.4 billion per year. In addition, these storms produced 1,646 fatalities during that decade .

Damaging winds are often called “straight-line” winds to differentiate the damage they cause from tornado damage. Strong thunderstorm winds can come from several different processes. Most thunderstorm winds that cause damage at the ground are a result of outflow generated by a thunderstorm downdraft. Damaging winds are classified as those exceeding 50-60mph. HazardHub uses a NOAA standard of 58+ mph .

Damaging winds are a product of convective storms, often called thunder storms, that occur everywhere in the United States but most frequently in the areas east of the Rockies where warm, moist air from the Gulf of Mexico meets cooler air sweeping southward.

The HazardHub Damaging Winds Risk File was compiled from long-term NOAA Doppler radar and other sources. The NOAA data contains almost 30 years of convective storm event data for every county in the United States consisting of over 31 million records.

The HazardHub Damaging Winds model covers both the total number of convective storm events which includes “thunder storms” that do not produce winds exceeding 58 mph. The sample data reports only total convective storms, but long term observations suggest that 10% of these storms produce damaging winds so that value was used to produce 58+ mph storm results.