STORM LAKE II
OperatingWind power plant
- Capacity
- 80 MW
- Primary fuel
- Wind
- County
- Buena Vista County
- Operator
- AES WIND GENERATION INC
- Status
- Operating
- Commissioned
- 1999
- EIA plant ID
- 55287
- Generators
- 1
- Technology
- Onshore Wind Turbine
- Net generation (2024)
- 114 GWh
- Capacity factor (2024, EIA nameplate)
- 16%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 42.7456, -95.3085
STORM LAKE II, an 80 MW Wind power plant in Buena Vista County, Iowa. Operated by AES WIND GENERATION INC, commissioned 1999.
How STORM LAKE II compares
With 80 MW of capacity, STORM LAKE II ranks 51st among the 198 operating power plants Bywatts maps in Iowa and 27th of the 63 operating Wind plants in the state. It accounts for about 1.6% of Iowa's operating Wind capacity and 0.5% of all operating capacity in the state. Nationally it is the 301st-largest of the 708 operating Wind plants in the database. Commissioned in 1999, it is older than 51% of the 198 operating Iowa plants with a recorded commissioning year. It shares Buena Vista County with 3 other operating plants, including INTREPID and STORM LAKE 1.
EIA-860 lists 1 generator at the site with 80 MW of nameplate capacity, all onshore wind turbine technology. Net generation was 114 GWh in 2024 (a 16% capacity factor), down 29% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 161 kV line, about 2.5 miles away. Another 4 operating power plants totaling 293 MW sit within 25 miles; the largest is INTREPID (176 MW, Wind).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
STORM LAKE II is an 80 MW wind power plant in Buena Vista County, IA, operated by AES WIND GENERATION INC, commissioned in 1999. Buena Vista County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.1 of 5 at the 52nd national percentile. Tornado is the leading peril, rated Relatively Moderate by FEMA at the 97th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a wind plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Buena Vista County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Tornado | Relatively Moderate | 97th | 4.9 of 5 | 0.48 |
| Winter weather | Relatively Moderate | 92nd | 4.7 of 5 | 15.4 |
| Heat wave | Very Low | 91st | 4.6 of 5 | 5.5 |
| Strong wind | Relatively Moderate | 76th | 4.0 of 5 | 3.9 |
| Ice storm | Relatively Low | 62nd | 3.5 of 5 | 0.69 |
| Hail | Relatively Moderate | 57th | 3.3 of 5 | 5.3 |
| Lightning | Very Low | 42nd | 2.7 of 5 | 41.5 |
| Wildfire | Very Low | 23rd | 1.9 of 5 | <0.01 |
| Riverine flooding | Very Low | 18th | 1.7 of 5 | 2.1 |
| Earthquake | Very Low | 13th | 1.5 of 5 | <0.01 |
Perils not assessed in Buena Vista County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Buena Vista County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.