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.
A Potentially Record-Breaking El Niño Is Building for Fall-Winter
Every ensemble member of the ECMWF System 5 seasonal model now projects an exceptionally strong El Niño this fall and winter, with a real shot at surpassing the 1997–98 and 2015–16 events — the two strongest in the modern 150-year record. Here's what the pattern looks like and what it means for U.S. weather.
August Heat Outlook: What Every U.S. Power Grid Should Expect
ERCOT just broke its all-time load record in July. El Niño is strengthening toward very-strong status. Here's how each U.S. ISO region is set up as the calendar flips to August — which grids face the highest heat and record risk, where hydro constraints amplify the stress, and where the signal is mixed.
ERCOT Just Broke Its All-Time Load Record — in July
On July 22, 2026, ERCOT served 91,089 MW — smashing the previous record of 85,508 MW set in August 2023. It wasn't a hotter day; it was a heavier grid. Data centers, manufacturing, and population growth have raised the load floor, and August hasn't happened yet.
What Permanent Daylight Saving Time Would Mean for the Power Grid
The U.S. House voted 308–117 to make Daylight Saving Time permanent. For grid operators, the change is more than a calendar fix — it shifts when solar generation arrives relative to morning demand, reshapes the winter duck curve, and eliminates the 23- and 25-hour trading days that create scheduling headaches twice a year.
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