Western Interconnection hourly electric power supply: June 28 - July 4, 2026
Distribution powerline at Rico, Colorado
Linecurrents photo
November 11, 2019
by Allyn Svoboda
July 14, 2026
Week summary
U.S. Energy Information Administration (EIA) Hourly Electric Grid Monitor is the source for data for this report. EIA provides this disclaimer:
Disclaimer: The information submitted by reporting entities is preliminary data and is made available "as-is" by EIA. Neither EIA nor reporting entities are responsible for reliance on the data for any specific use.
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[above charts] U.S. Western Interconnection electric generation from all energy sources - June 28, 2025 - July 4, 2026. Linecurrents.live charts, U.S. Energy Information Administration (EIA) Hourly Electric Grid Monitor data.
Non-combustion generation results
Hydroelectric dams and solar energy contributed the largest individual shares of electric generation in the Western Interconnection for the week beginning June 28, 2026.
Non-combustion energy sources - wind, solar, nuclear, geothermal and hydroelectric - combined supplied 72.34% of total electric power generated.
Solar generation 65,000 to 75,000 MWhr per hour during peak-sun hours 10 AM to 6 PM Pacific time. Maximum hourly production of nearly 80,000 MWhr late afternoon June 30.
Wind
fairly stable all week - most hours
Hydroelectric
increases in early evenings to compensate for loss of solar generation and evening increase in electric consumers’ demand.
Nuclear
constant production
Geothermal
constant production
Hourly electric generation by type for each day
Daily charts for the week beginning June 28, 2025 show hourly totals of:
U.S. Energy Information Administration (EIA) non-combustion electric generating categories.
total of all electric energy sources, including combustion.
Linecurrents charts created from U.S. Energy Information Administration (EIA) data.
EIA collects and displays standalone hourly battery energy storage megaWatt-hours. Standalone battery energy is not shown in this report because:
battery energy storage systems (BESS) do not generate (produce) electricity.
hourly values are negative (-) when absorbing power from other electric generating sources delivered by the electric transmission or distribution system, and positive (+) when releasing stored energy.
The EIA category for co-located solar with battery systems are included in this report because the solar portion is a generating source.
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NOTE
EIA retired Western Area Power Administration (WAPA) Rocky Mountain (WACM) and Upper Great Plains (WAUW) regional Balancing Authorities March 31, 2026, according to EIA Hourly Grid Monitor list of balancing authorities.Southwest Power Pool (SPP) in the EIA central region and Eastern Interconnection expanded its service to become the regional transmission organization (RTO) for the areas previously controlled by the two WAPA balancing authorities.
EIA Hourly Grid monitor does not show a replacement for WACM and WAUW (such as “SPP-West”) at the date of this report publication.
EIA HOURLY GRID MONITOR DATA REGIONS
United States regions defined by U.S. Energy Information Administration (EIA). Map adapted from U.S. EIA Hourly Electric Grid Monitor. Colors and region labels added by Linecurrents.live.