Winter Grid Stress: PJM, NERC and the Price of Cold

Gas in storage is above normal but not ample; getting it to plants in the cold is the test

PJM enters the winter with gas storage modestly above normal and a strong El Nino tilting the odds toward a milder season, but its capacity market has cleared at the price cap with a shortfall in consecutive auctions. The price of cold is now set less by the gas in storage than by the generators that fail when the cold arrives, and by capacity charges that lift retail unit rates whatever the weather, while the fight over how much new data center load the next auction must cover decides where that charge goes next.

ISSUED 11 OCTOBER 2026 · INFRASTRUCTURE & ENERGY · AEGEAN INTELLIGENCE GROUP · AUDITED AGAINST AEGEAN-OS

THE DOCUMENT

NumberAIG-INS-26-006

Product IDPMR-2026-1011-GLB-006

ProductAssessment

Issued2026-10-11

Pages17

DistributionPublic release

TimelinessCURRENT

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Aegean Intelligence Group, “Winter Grid Stress: PJM, NERC and the Price of Cold,” AIG-INS-26-006, The Aegean Register, 11 October 2026.

Winter Grid Stress: PJM, NERC and the Price of Cold cover

Abstract

Central finding

The cost of cold in PJM has moved from the volume of fuel to the delivery of fuel and the capacity market. Gas storage is above normal, though with a thinner cushion than a year ago, and the weather odds lean mild, so the probable winter is an expensive one rather than a dangerous one. The danger sits in the tail: a short, wide cold snap that takes out gas and other generators faster than demand rises, as the January storm did. Meanwhile the capacity auctions price a structural shortage that a mild winter does nothing to cure. The regulator has kept the cap in place for the December auction and has held up the backstop meant to fix the shortage, and the next lever on the clearing price is PJM's request to stop counting new large loads that bring no supply of their own in the auction's demand.

Publication at a glance

Source registry22 entries

Forward claims3

Pages17

Issued 2026-10-11Public releaseCURRENTAIG-INS-26-006

Cover

FORWARD CLAIMS · DATED TO PUBLICATION · SCORED ON THE SCORECARD →

ID	Statement	p	Made on	Resolves by	Status
CLM-2026-380	Lower 48 working gas in storage for the week ending 13 November 2026, in the weekly storage report released on 19 November 2026, is at or above the five-year average for that week.	0.70	2026-10-11	2026-11-19	Locked
CLM-2026-381	The RTO clearing price of PJM's base residual auction for the 2029/2030 delivery year equals that auction's price cap.	0.70	2026-10-11	2026-12-31	Locked
CLM-2026-382	Lower 48 working gas in storage for the week ending 13 November 2026 will be about 3,900 Bcf.	3820 to 3980 Bcf (central 3900)	2026-10-11	2026-11-19	Locked

A claim is entered in the brief's own words and carries its publication date and the day it entered the ledger: the register's briefs on 8 September 2026, when the standard was first applied; the forward benchmark on the day it was locked. It resolves only against a dated public source. The scoring rule is on the Methodology page.

THE CENTRAL JUDGMENT

KEY JUDGMENTS

Bottom line

KJ-01Gas in storage is unlikely to run short for PJM this winter, and Lower 48 storage will probably stay at or above its five-year average into mid-November, but delivery of gas to generators in a cold snap remains a live risk. Storage sits above its five-year average nationally and by more in the East region, yet it is 130 Bcf below a year earlier, which is why the cushion is modest rather than ample, and in the January storm plants were forced offline in freezing weather.MODERATE

KJ-02The main physical risk this winter is forced generator outages during a short, wide cold snap, including gas units that cannot get fuel, not a shortage of installed capacity. In the January storm outages ran above the operator's own seasonal projection while demand stayed below record, and one listed wire report tied most outages to freezing weather and constrained gas supply, a split no source read here gives in figures.MODERATE

KJ-03The next PJM base capacity auction will more likely than not clear at its price cap again. The two main risks to that outcome are a FERC order, in time for the auction, accepting PJM's plan to drop new large loads that bring no supply from the auction's demand, and a delay of the auction past year-end. The last three auctions cleared at their caps, the most recent one about 6,800 MW short, and the exclusion would remove only large load added since that auction's forecast, so a clear below the cap needs both a timely order and a large new supply response.MODERATE

KJ-04A strong El Nino lowers the odds of a severe, prolonged cold winter across PJM but does not remove the risk of a single sharp cold outbreak. The ENSO signal and the official seasonal outlook shift seasonal averages toward warmth, while the damage in recent winters came from events lasting days.LOW

KJ-05Retail unit rates for power in PJM will be higher this winter than last, because capacity charges for the current delivery year are higher, though total bills may still fall if the winter is mild and the timing varies by state. The auction for the delivery year that began in June 2026 cleared at its cap, 22 percent above the prior year's price, and that charge runs through this winter for every load serving entity, while state default service calendars decide when each customer sees it.MODERATE

SOURCES AND LIMITS

Open-source intelligence current through 11 October 2026. The publication carries a 22-entry source registry, explicit confidence tags, limitations, and deterministic resolution rules for its forward claims.

SOURCE REGISTRY: 22 ENTRIES17 PAGESTIMELINESS: CURRENT

The source tiers, estimative language, forward-claim rule, scoring, and corrections record are public on the Methodology page.