Wind Speed

The purpose of the “Windspeed Web Site” is to provide users with a site specific windspeed using the GPS coordinate system. On this website, users can retrieve windspeeds from ASCE 7-10, ASCE 7-05 and ASCE 7-93. Windspeeds are also provided for serviceability purposes for 10, 25, 50 and 100-year return periods when using ASCE 7-10.

The reason this utility is needed is that the spatial resolution of the windspeed maps that are displayed in ASCE 7 are not sufficient to determine a site specific windspeed. There are no reference city or town locations on the ASCE 7 windspeed maps and while county boundaries are shown, the resolution is affected when the maps are expanded large enough to distinguish the boundaries and approximate the city locations.


To find the windspeed for a specific area, select one of the following methods:

  1. Click the radio button for decimal and enter latitude and longitude in the spaces in decimal form and select “Get Windspeed” or

  2. Click the radio button for address and enter the desired address; Select “Find” to auto-populate the latitude and longitude and select “Get Windspeed” or

  3. Find the site on the map, right click the mouse and the latitude and longitude will be displayed in decimals. Click the radio button for decimal and then the coordinates auto-populate in the decimal location. Select “Get Windspeed” or

  4. If your site is in the US Virgin Islands, Guam, American Samoa or Hawaii, click the appropriate radio button below and select “Get Windspeed”.

Windspeeds are site-specific for the GPS coordinates provided and are found by interpolation to the nearest 1-mph.

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