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# Metrics

## Regional metrics

Regional metrics are available via `/region/{iso}/{metric}/` endpoints. These provide forecasts and actuals for geographic areas within each ISO.

System-wide electricity demand (load) for a region, measured in **MW**.

Represents the total power consumption within the specified region, including residential, commercial, and industrial loads.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, ensemble, actual, backcast

Total wind generation capacity for a region, measured in **MW**.

Represents aggregate output from all wind facilities within the region. Driven by weather model wind speed and direction forecasts.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, ensemble, actual, backcast

Total solar generation capacity for a region, measured in **MW**.

Represents aggregate output from all solar facilities within the region. Driven by weather model irradiance, cloud cover, and temperature forecasts.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, ensemble, actual, backcast

Planned and forced generation outages within a region, measured in **MW**.

Represents the total generation capacity that is offline due to planned maintenance or unplanned forced outages as reported by the ISO.

**Granularity:** Daily | **Endpoints:** forecast, continuous, ensemble, actual, backcast

Population-weighted temperature for a region, measured in **°C**.

Averages temperature across the region weighted by population density, providing a demand-relevant temperature signal rather than a simple geographic average.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, ensemble, actual, backcast

## Plant metrics

Plant metrics are available via `/plant/{iso}/{metric}/` endpoints. These provide forecasts for individual wind and solar facilities.

Plant generation forecasts represent theoretical power production based on weather conditions. They do **not** account for economic curtailment, transmission constraints, maintenance outages, or regulatory limitations.

Hourly power production forecast for individual wind plants, measured in **MW**.

Based on weather model wind speed and direction at the plant's coordinates, combined with the plant's nameplate capacity and power curve characteristics.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

Hourly power production forecast for individual solar plants, measured in **MW**.

Based on weather model irradiance, cloud cover, and temperature at the plant's coordinates, combined with the plant's nameplate capacity and panel characteristics.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

Icing risk coverage percentage for individual wind plants, measured as **0–100%**.

Estimates the proportion of turbines at a plant likely to be impacted by icing conditions. High values indicate significant risk of ice-related generation losses.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

Snow and ice coverage percentage for individual solar plants, measured as **0–100%**.

Estimates the proportion of panel area likely to be covered by snow or ice. High values indicate significant risk of snow-related generation losses.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

## Cell metrics

Cell metrics are available via `/cells/{iso}/{metric}/` endpoints. Regional forecasts are disaggregated to H3 hexagonal cells; the `resolution` query parameter selects the H3 level (2–5). Each cell response includes a GeoJSON geometry clipped to the ISO boundary.

Electricity demand forecast disaggregated to the cell level, measured in **MW**.

Derived by breaking down regional forecasts using population weighting, historical load patterns, local weather data, and other factors.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

Wind generation forecast disaggregated to the cell level, measured in **MW**.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

Solar generation forecast disaggregated to the cell level, measured in **MW**.

**Granularity:** Hourly | **Endpoints:** forecast, continuous, backcast

## Gas metrics

Gas metrics are available via `/gas/` endpoints. No metric parameter is needed — all gas endpoints return price forecasts.

Natural gas price forecast for major US trading hubs, measured in **\$/MMBtu**.

Incorporates weather-driven demand, storage levels, and market fundamentals. Forecasts are available for multiple hubs including Henry Hub, TETCO M3, Algonquin Citygate, and others.

**Granularity:** Daily | **Endpoints:** forecast, continuous

## LMP metrics

LMP metrics are available via `/lmp/{iso}/{type}/` endpoints. The `type` parameter selects the market type.

Day-ahead Locational Marginal Price forecasts for select pricing nodes and hubs, measured in **USD/MWh**.

LMP reflects the marginal cost of serving an additional unit of load at a specific location on the grid. Forecasts combine demand, generation, and transmission models. Essential for revenue optimization, hedging, and market participation.

**Granularity:** Hourly | **Endpoints:** forecast, continuous

Real-time Locational Marginal Price forecasts, measured in **USD/MWh**. Captures intraday price variation driven by short-term load, generation, and transmission conditions.

**Granularity:** Hourly | **Endpoints:** forecast, continuous

## Quick reference

| Metric           | Parameter    | Units    | Granularity | Scope          |
| ---------------- | ------------ | -------- | ----------- | -------------- |
| Demand           | `demand`     | MW       | Hourly      | Region, County |
| Wind Generation  | `wind`       | MW       | Hourly      | Region, Plant  |
| Solar Generation | `solar`      | MW       | Hourly      | Region, Plant  |
| Outages          | `outage`     | MW       | Daily       | Region         |
| Temperature      | `poptemp`    | °C       | Hourly      | Region         |
| Wind Icing       | `wind_icing` | %        | Hourly      | Plant          |
| Solar Snow       | `solar_snow` | %        | Hourly      | Plant          |
| Gas Price        | —            | \$/MMBtu | Daily       | Hub            |
| Day-Ahead LMP    | `dalmp`      | USD/MWh  | Hourly      | Node           |
| Real-Time LMP    | `rtlmp`      | USD/MWh  | Hourly      | Node           |