The national 15-day gas-weighted total is 237 gwCDD, from 217 on the previous run, against a 10-yr normal of 122.
HH + regional power supportive (cooling burn above normal) Direction and mechanism only — never a price view.
SetupERCOT is deep into the sustained high-accumulation phase of summer, with a 15-day CDD total of 433 running 262 units above the published normal of 170 — an anomaly that reflects the persistent dominance of a broad subtropical ridge across the southern tier. The synoptic configuration continues to concentrate the heaviest cooling demand pressure across the Texas load zone, with no sign of the ridge axis retreating.
EvolutionThe latest run adds only 4 CDDs to the already-elevated 15-day ERCOT total, a marginal revision characteristic of a pattern where the ridge is so deeply anchored that incremental model adjustments are small. Run-to-run stability at this magnitude indicates high model confidence in heat persistence, with little scenario divergence being introduced by successive runs.
EnergyReader US demand note — stored zone brief, generated 19 Jul 2026
SetupThe 15-day cooling degree-day total is 353, 201 above the 152 ten-year normal.
EvolutionDown 5 from the prior run at 359.
EnergyReader US demand note — stored zone brief, generated 19 Jul 2026
SetupA persistent upper-level ridge anchored over the central US is driving cooling demand well above the climatological baseline, with the 15-day accumulation of 178 CDDs running 101 units above the published normal of 77. The ridge axis appears positioned to sustain heat concentration across the Great Lakes corridor, keeping Chicago Citygate and MISO load zones under continued above-normal demand pressure.
EvolutionThe latest run adds 39 CDDs to the 15-day total relative to the prior run — a meaningful upward revision pointing to run-to-run convergence on a more persistent heat pattern rather than a retreating signal. No evidence in the current guidance suggests the ridge is beginning to break down or shift away from the central US.
EnergyReader US demand note — stored zone brief, generated 19 Jul 2026
SetupA broad ridge influence extending into the Mid-Atlantic and New England is keeping the Northeast firmly in the warm sector of the dominant synoptic pattern, with the 15-day CDD accumulation of 189 running 85 units above the normal of 104. The setup is characteristic of a sustained warm regime rather than a brief excursion, with Algonquin and TETCO M3 corridors exposed to continued above-normal cooling demand.
EvolutionThe latest run adds 20 CDDs to the 15-day Northeast total, a constructive upward revision though more modest than the Midwest — consistent with a ridge centered farther west, with the Northeast capturing the warmer flank rather than the core anomaly. Run-to-run momentum remains positive, with no indication of a pattern break in the current guidance.
EnergyReader US demand note — stored zone brief, generated 19 Jul 2026
gwHDD/gwCDD = gas-weighted degree-days, base 65°F, weighted by the desk's published city basket (Open-Meteo forecasts). Anomaly vs the 10-yr normal for the same 15-day calendar window. "gwCDD Δ" = 15-day anomaly vs the 10-yr normal; "on run" = change vs the previous stored run. Zone prose is stored content from the US demand note, attributed and date-stamped above — never generated at render.
gwHDD/gwCDD = gas-weighted degree-days, base 65°F, weighted by the desk's published city basket (Open-Meteo forecasts). Anomaly vs the 10-yr normal for the same 15-day calendar window. Missing feeds are omitted, never zero-filled; stale data renders desaturated with its as-of stamp. Direction and mechanism only, site-wide — nothing on this page is a trade recommendation or a price view.