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Three-Day Reliability Region Demand Forecast

Download the ISO's hourly demand forecast for each day as forecasted in-day and the preceding two days, broken down by reliability region. The region's transmission system is divided into eight reliability regions that reflect the system's operating characteristics and major constraints. New England's load zones, which represent aggregations of pricing nodes within specific areas, generally correspond to these reliability regions.

 

Note: NEMASSBOST = Northeast Massachusetts and Boston Area Reliability Region; SEMASS = Southeast Massachusetts Reliability Region; WCMASS = Western/Central Massachusetts Reliability Region; % = the reliability region's demand as a percentage of the zonal total. The demand included in the forecast is in megawatts (MW).

Forecasts prior to May 24, 2017, can be found on the Three-Day Reliability Region Demand Forecast Archive.

 

 
Three-Day Reliability Region Demand Forecast
Description Timestamp Download
May 22, 2025 05/20/2025 09:30 AM EDT CSV
May 08, 2025 05/08/2025 06:24 PM EDT CSV
May 09, 2025 05/09/2025 11:18 AM EDT CSV
May 10, 2025 05/10/2025 02:26 PM EDT CSV
May 11, 2025 05/11/2025 09:15 AM EDT CSV
May 12, 2025 05/12/2025 04:57 PM EDT CSV
May 13, 2025 05/13/2025 03:55 PM EDT CSV
May 14, 2025 05/14/2025 12:34 PM EDT CSV
May 15, 2025 05/15/2025 03:37 PM EDT CSV
May 16, 2025 05/16/2025 03:00 PM EDT CSV
May 17, 2025 05/17/2025 08:43 PM EDT CSV
May 18, 2025 05/18/2025 11:57 AM EDT CSV
May 19, 2025 05/19/2025 10:33 AM EDT CSV
May 20, 2025 05/20/2025 09:30 AM EDT CSV
May 21, 2025 05/20/2025 09:30 AM EDT CSV