US Morning Demand Note, Tuesday, July 28, 2026
The dominant signal this pre-open is a broad heat pattern that continues to run well above normal across all four demand-supportive regions, even as the 15-day gas-weighted CDD aggregate trims from 231 to 219, a net erosion of 12 CDDs that warrants attention but does not yet break the bullish structural read.
Synoptically, the setup reflects a persistent upper-level ridge anchoring heat across the southern tier and reinforcing anomalous warmth well into the mid-continent. The run-to-run evolution here is one of modest cooling rather than outright pattern collapse, the aggregate CDD count is stepping down, but the anomaly versus normal (102 CDDs above the 117 seasonal baseline) remains deep enough that cooling demand is driving a meaningfully above-normal gas burn. The critical inflection to watch is centered on August 6, where the widest single-day run-to-run delta of -3.8 CDDs sits. That date marks where model ensembles are most actively debating the ridge's forward evolution: if the ridge axis holds its current longitude, the August 6 erosion is likely a brief amplitude wobble before heat reloads; if it sheds eastward or the trough currently probing the western flank gains latitude, that single-day gap could widen into a more sustained retrenchment through the back half of the 15-day window. Three consecutive runs in one direction would be the signal to take the model shift seriously, we are not there yet.
ERCOT remains the anchor of this heat event and the zone where the pattern is most unambiguously priced. At 400 CDDs against a 175 normal, the 225-unit anomaly is extraordinary, and the -2 delta from the prior run is essentially noise inside a sigma-23 zone. Waha and HSC basis dynamics are subordinate to the sheer cooling load volume here. The South/West zone follows closely, 324 to 312, with a 166-unit anomaly against a 146 normal, and SoCal's contribution means electric power burn is pulling on both gas and grid simultaneously, sustaining the regional supportive read. Midwest is the zone where the model erosion is most pronounced: a -26 delta, the steepest of any zone, pulling the 15-day count from 201 to 175. Even so, at 104 CDDs above a 71-unit normal and across a sigma-14 zone, the anomaly is outsized, Chicago Citygate and MISO cooling load is running well above any prior comparable stretch. The Northeast holds relatively steady, off just 3 CDDs to 171 against a 96 normal; Algonquin and TETCO M3 are seeing less dramatic absolute heat but sustained above-normal conditions keep the chip lit.
The no-regime-call flag on this run is the primary source of uncertainty to carry into the session, inputs were incomplete, and the absence of a confirmed regime label means the structural narrative rests on the CDD anomalies alone rather than a verified synoptic regime. What changes the picture from here: a third consecutive run eroding the Midwest CDD count would signal genuine ridge axis migration and bring the aggregate anomaly toward a less supportive threshold; resolution of the August 6 model disagreement toward the trough scenario would front-run a mid-period demand break; and any morning model run that clips ERCOT's anomaly meaningfully, currently the load floor of this entire pattern, would be the single fastest route to a revised market read.