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Judith Gap Wind Energy Center

Wind power plant in Montana, United States of America. Approximate location 46.5725, -109.7531.

WindMontanaUnited States of America

Judith Gap Wind Energy Center is a 135 MW wind power station in Montana, United States of America. It is operated by Invenergy Services LLC. Based on reported annual generation of 442 GWh, it can supply roughly 126,171 homes. It ranks #1635 of 9,833 United States of America power plants by installed capacity. Commissioned in 2006, it is around 20 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 10.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

135MW installed capacity
442GWh reported / yr
126,171homes powered
2006commissioned (~20 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0056377.

Reported generation trend

2013: 508 GWh20132014: 490 GWh20142015: 455 GWh20152016: 481 GWh20162017: 451 GWh20172018: 430 GWh20182019: 442 GWh2019508 GWh

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Invenergy Services LLC. All plants by this company →

Local climate & thermal context

This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 46.6°N — which shapes how much energy it can produce and how its output varies through the year.

6.9°Cannual mean temp
4,102heating degree-days (base 18°C)
62cooling degree-days (base 18°C)
1,312 melevation

Monthly mean temperature

J: -5 °CJF: -2 °CFM: 1 °CMA: 6 °CAM: 11 °CMJ: 16 °CJJ: 19 °CJA: 19 °CAS: 13 °CSO: 8 °CON: 0 °CND: -4 °CD19 °C

Heating degree-days here run 67% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 85/100 — this site sits in the top third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

How it compares & nearby plants

The #330 largest wind power plant of 1139 in United States of America by capacity.

United States of America has 1139 wind power plants in this dataset, together about 104,477 MW of capacity.

Nearby power plants

Location

Coordinates 46.5725, -109.7531 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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