Real-time weather data, model guidance, and NWS alerts organized by U.S. power market ISO regions. Weather Workbench brings these official forecast products into a single monitoring workspace so users can quickly scan conditions without switching between multiple sources. Select a region to view forecasts, precipitation, and weather sources.
Click a region to view detailed weather data. Colors reflect active alert severity.
Map boundaries are approximate and illustrative. ISO/RTO territories frequently cross state lines; several states are served by multiple operators.
California ISO
California's grid operator managing generation and transmission across the Golden State.
Electric Reliability Council of Texas
Texas's independent grid operator, covering ~90% of the state's electric load.
Midcontinent ISO
Spanning 15 U.S. states and Manitoba, managing the Midcontinent's energy market.
ISO New England
Operating New England's bulk power system across six northeastern states.
New York ISO
Managing New York State's electric grid and competitive wholesale markets.
PJM Interconnection
America's largest grid operator, serving 65M+ people across 13 states and DC.
Southwest Power Pool
Central U.S. regional transmission organization across 15 states, expanded in April 2026 to include the Colorado Front Range and Wyoming.
Western Interconnection
The Western Interconnection's non-CAISO footprint, spanning 11 western states from the Pacific Northwest to the desert Southwest.
Reliability organization, not an ISO/RTO.
Southeast Energy Exchange Market
A bilateral energy exchange serving utilities across 8 southeastern states, coordinating power trade outside of traditional ISO markets.
Bilateral exchange market, not a traditional ISO/RTO.
Background
A short tour of the structure of U.S. wholesale electricity markets, why weather drives them, and how to use Weather Workbench day-to-day.
In-depth explainers on the weather-and-energy interface — degree days, CPC outlooks, winter storm reliability, renewable forecasting, and hurricane season impacts on the grid.
How Weather Drives U.S. Power Markets
A practical overview of how temperature, wind, solar, and storm patterns translate into electricity demand, generation output, and wholesale prices across the nine major U.S. ISO regions.
Understanding Heating and Cooling Degree Days
What HDD and CDD actually measure, why the natural gas and power industries standardized on a 65°F base, and how to interpret degree day departures in the context of weekly load forecasts.
Reading the CPC 6–10 and 8–14 Day Outlooks for Energy Decisions
A walkthrough of the NOAA Climate Prediction Center's extended outlooks: how the probabilistic categories work, what they actually forecast, and how to use them in weekly load and gas trading workflows.
How Wind and Solar Forecasts Shape ISO Operations
Why renewable forecasting matters more than installed capacity, how ISOs build and use wind and solar forecasts, and where the major sources of error originate.
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