Division of Energy
Wind Energy Resources
- Small Wind Energy Systems, Fact Sheet--PUB2313 (02/09)
- Net Metering and the Easy Connection Act, Fact Sheet--PUB2238 (02/08)
- Wind Energy Public Forums (2008 forums)
- Missouri Wind Energy Workgroup
- Wind Energy Internet Resources
- Missouri Anemometer Loan Project Initial Results (Graphs and Data Files)
Wind Speed Maps
The final wind speed maps show the predicted mean wind speed in Missouri at heights of 30 meters, 50 meters, 70 meters, and 100 meters, respectively, above the effective ground level. As of 2005, typical tower height for the current generation of large utility-scale wind turbines of 750 KW (kilowatt) to 2 MW (megawatt) rated capacity is 70 meters. A typical height for small turbines of up to 50 KW rated capacity is 30 meters, which is consistent with on-farm or residential use.
|Wind Speed 30 Meters||High Res 3.9 MB||Low Res 717 KB|
|Wind Speed 50 Meters||High Res 2.8 MB||Low Res 783 KB|
|Wind Speed 70 Meters||High Res 3.2 MB||Low Res 726 KB|
|Wind Speed 100 Meters||High Res 3.1 MB||Low Res 733 KB|
Wind Power Density Maps
The 50-meter wind power density map shows the predicted mean wind power density (amount of wind energy) at 50-meter height in the National Renewable Energy Laboratory's (NREL) standard wind resource classes.The 100-meter wind power density map shows the predicted mean wind power density at 100-meter height. When compared to the 50-meter wind density map, this indicates a substantial increase in wind energy as the distance from the ground increases.
|Wind Power Density 50 Meters||High Res 2.5 MB||Low Res 814 KB|
|Wind Power Density 100 Meters||High Res 2.4 MB||Low Res 725 KB|
The mean speed and power describe different aspects of the wind resource, and both can be useful in different ways. The mean speed is the easiest for most people to relate to. Some experts regard the mean wind power, which depends on the air density and the cube of the wind speed, as a more accurate indicator of the wind resource when assessing wind project sites.
Generally speaking, utility-scale wind power projects using large turbines that service the electrical grid require an average wind speed of at least 7 meters per second (15.7 miles per hour) or average power of at least 400 Watts per square meter (NREL class 4). Small-scale turbines such as those used by farmers and homeowners are often used in locations with lower average annual wind speeds.
Persons interested in evaluating the financial aspects of an investment in a wind energy project are encouraged to become familiar with one or more of the free wind energy financial calculators that can be found on the internet at:
- Windustry: http://www.windustry.com/calculator/default.htm
- Wind Powering America (U.S. Department of Energy): http://analysis.nrel.gov/windfinance/login.asp
- Canada's Renewable Energy Decision Support Center's "RETScreen International": http://www.retscreen.net/ang/g_win.php
These maps are final work products of AWS Truewind Solutions prepared under contract with the Missouri Department of Natural Resources, with financial support from the U.S. Department of Energy's Wind Powering America.
Validation of the map was conducted by the National Renewable Energy Lab and consulting meteorologists. After reviewing the validation results, NREL recommended moderate adjustments in speed and power to one region of the state. The speed was increased by 5 percent in eastern Missouri in the counties of St. Charles and St. Louis, and the power was increased by about 30 percent. For your convenience we have kept the INTERIM wind maps online.
Note that while it is believed that these maps represent an accurate overall picture of Missouri's wind energy resource, estimates at any location should be confirmed by additional wind measurements taken at the specific site.
Portions of the preceding description were adapted from the final report submitted by AWS Truewind as part of their preparation of these maps. For more information see AWS Truewind's Final Report .
30 meter average annual wind speed - County level maps
All of the following counties are predicted to have some areas with an average-annual wind speed (measured at 30 meters, 100 feet above ground level) of 6.0 meters per second (13.4 miles per hour) or greater.
Click below to view a county level version of the 30-meter wind speed map for the listed counties. State and county roads are displayed in red.
Note: * Indicates counties that are predicted to have some areas with average annual wind speeds between 6.5 and 7.0 meters per second (14.5 and 15.7 miles per hour) at 30 meters above ground level.
Counties not included in the list below are predicted to have very little area, or no area, with an average-annual wind speed of 6.0 meters per second (13.4 miles per hour) or greater.
Missouri Wind Energy Resources CD-ROM
- An interactive version of the wind maps, that includes ArcReader 8.3 Geographic Information System map viewing software is available on CD-ROM. According to the company that created ArcReader 8.3, the software will work on a PC-Intel system with:
- Windows NT 4.0 with service pack 6a,
- Windows 2000 or
- Windows XP operating systems
- It will not work on Windows ME, 98 or earlier.
- The CD-ROM will also include a variety of wind energy publications, presentations, and links to internet websites.
You can request a free copy of this CD-ROM by filling out our online form. It is expected that the initial mailing of the CD-ROM will be during September 2005.