US natural gas futures surged as much as 5.8% on Monday, November 9, 2026, following revised weather forecasts predicting cooler temperatures along the Atlantic seaboard. The shift in outlook suggests increased demand for heating fuel as winter approaches, prompting a sharp rise in prices.
The cooler weather forecasts likely triggered automatic unwinding of short positions by hedge funds, exacerbating the price increase. Short-only positions on US gas contracts hit a record high last week as traders anticipated a mild winter due to a Super El Niño pattern.
The combination of higher demand expectations and forced short covering accelerated the price surge beyond what the weather changes alone would have caused. The market reaction underscores the sensitivity of natural gas prices to short-term weather forecasts and speculative positioning.