Final Missouri Wind Maps
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 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.
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:
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.