US Morning Demand Note, Wednesday, July 29, 2026
The dominant signal this morning is a broad, persistent heat pattern driving gas-weighted CDDs to more than double seasonal norms across all four major demand zones simultaneously, a configuration that leaves little room for bears to hide.
The synoptic driver is a sprawling high-pressure ridge anchored across the central and southern US, funneling heat into the continent's core demand corridors. What matters most from a run-to-run standpoint is that the latest model update has pushed the 15-day national gas-weighted CDD count from 219 to 243, a 24-unit upward revision against a normal of 117. That puts the anomaly at 127, meaning the market is pricing a window of heat that is running at roughly twice the seasonal baseline. The key uncertainty is the ridge's eastern boundary: if the axis holds near its current position, the Northeast stays locked in the demand-supportive column; if the ridge sheds eastward into the Atlantic, cooling load along Algonquin and TETCO M3 could ease more quickly than the 15-day window implies. The widest run-to-run day-level swing in this packet falls at August 10, a 5.7-unit gap, flagging that the tail end of the forecast window remains the least stable and where model convergence or divergence in coming runs will carry the most information.
Zone-by-zone, the Midwest is the most structurally significant revision this morning. Chicago Citygate and MISO are registering a CDD anomaly of 130 against a sigma of only 14, indicating that the heat departure sits roughly nine standard deviations above the mean. The 15-day tally moved from 175 to 200, a 24-unit gain that directly prices incremental generation demand and pipeline pull across the MISO footprint. The Northeast also chips in with a 21-unit CDD revision to 192 against a normal of 96, a 97-unit anomaly, meaningful for Algonquin basis and power burn, though the Northeast's smaller sigma of 19 means this zone remains more sensitive to any eastward ridge erosion. ERCOT adds 15 units to reach 416 CDDs against a normal of 175; the anomaly of 240 there is vast but the incremental revision is the smallest of the four zones, suggesting ERCOT's heat load is already well-embedded in the forward curve and today's news is more confirmation than surprise. The largest revision magnitude belongs to South/West: CDDs moving from 312 to 349, a 38-unit jump, against a normal of 145 and a sigma of 23, a 204-unit anomaly that keeps Transco Zone 4 and SoCal in firmly bullish territory for both gas and power.
The picture changes from here if the ridge begins its anticipated eastern migration sooner than the current ensemble median suggests, which would first show up as a Northeast CDD trim in the overnight model runs. A second pivot to watch is the August 10 inflection, if the next two or three runs converge on either holding or cutting load in that window, it redefines whether today's 243-unit CDD print represents the ceiling or a stepping stone to a further upward revision. Absent those model signals, all four zone chips remain lit and the aggregate cooling burn above normal keeps both Henry Hub and regional power markets in the supportive column.