US Morning Demand Note, Wednesday, August 12, 2026
The dominant trading signal this morning is a sprawling, persistent heat anomaly across all four demand-supportive regions, with cooling load running more than double normal nearly everywhere, offset by a meaningful cool erosion in the latest model run that deserves close attention on the mid-to-late period horizon.
The synoptic pattern favors an amplified ridge anchored over the south-central and southeast CONUS, sustaining the heat corridor from Texas through the mid-Atlantic. The national 15-day gas-weighted CDD came in at 217, down 15 from the prior run's 233, against a normal of 108, an anomaly of 109 CDDs above baseline. That is not a small number, and the erosion in the headline figure does not flip the story; it shades it. The sharpest run-to-run day gap is concentrated around August 26, where the models shed nearly 9 CDDs in a single date index. That is the hinge point to watch: if the ridge axis holds its current longitude into the final week of the period, that gap likely reconverges. If the ridge begins to retrograde or shed east ahead of a progressive trough, the late-period erosion could deepen and extend. Three consecutive runs in one direction would represent a model trend, not noise, this is run one of a southward adjustment, so conviction on the cooling side of the ledger is premature.
Zone-by-zone, the picture is uniformly supportive but with differentiated magnitudes. ERCOT is the outlier in the constructive direction: CDDs actually ticked up 4 on this run to 420, against a normal of 169, for a 251-unit anomaly. The Texas hub complex, ERCOT, HSC, Waha, is deep in summer load territory with no meaningful relief in sight, and the instrument chip is lit. South/West saw the largest absolute shed, down 25 to 298, but an anomaly of 160 above a 138 normal still represents a structurally hot pattern for Transco Z4 and SoCal. The Northeast shed 20 CDDs to 184 against a normal of 82, an anomaly of 102, Algonquin and TETCO M3 remain well within cooling-demand-supportive territory, though the run-to-run direction here bears watching given the region's sensitivity to ridge position. The Midwest slipped 11 to 151, with Chicago Citygate and MISO still sitting 89 CDDs above a 63-unit normal, the smallest anomaly of the four zones but still a historically elevated baseline.
The market read remains supportive: HH and regional power prices have a fundamental tailwind from cooling burn running materially above normal across all active zones.
What changes this picture: watch for a second and third consecutive run reinforcing the late-period August 26 gap, that would signal genuine ridge erosion and shift the anomaly trajectory. A trough track that accelerates east into the Plains earlier than the current consensus would pressure the Midwest and Northeast print first. On the other side, any model flip showing the ridge reloading through the final five days of the period would likely recover the lost CDDs and reinforce the current above-normal anomaly structure.