
Cold weather across the Northeast and Midwest pushed natural gas prices higher and led coal to overtake gas in PJM's generation mix. In New England, gas was diverted to heating and oil and diesel replaced gas at power plants, and the grid held up despite the Pilgrim nuclear outage.
Higher gas prices shifted generation toward coal, which reflects a gas-price-driven demand swing; analysts expect the coal advantage to fade as conditions normalize.
After 221 past bullish weather events, Natural Gas moved a median +3.3% over 5 sessions (61% higher; middle half -5.2% to +14.0%), and -0.3% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.