EnergyReader · Weather
Sunday 19 July ·04:00 JST ·05:00 AEST·JP 20 min fresh·AU 20 min fresh
Balance-tightening — demand +·JP run 2026-07-19·AU run 2026-07-19

Japan runs +47 gwCDD against the 10-yr normal on the 15-day; the NEM runs +7 gwHDD against the 10-yr normal on the 15-day.

Japan's demand-weighted 15-day gwCDD total runs +47 above the 10-yr normal — cooling load is the mechanism. Chubu leads at +62 CDD vs normal. Australia's demand-weighted 15-day gwHDD total runs +7 above the 10-yr normal — heating load is the mechanism. New South Wales leads at +19 HDD vs normal.

Japan · demand + · +47 gwCDDNEM · demand + · +7 gwHDDNiño3.4 +2.30 · 2026-07-08IOD -0.22 · 2026-07-05SAM +2.79 · 2026-06-30

What changed overnight

Open-Meteo · 2026-07-19
Japan 15-day gwCDD anomaly up +18 run-on-run to +47 vs the 10-yr normal.
gwCDD: +29 → +47
Open-Meteo · 2026-07-19
Australia (NEM) 15-day gwHDD anomaly down -4 run-on-run to +7 vs the 10-yr normal.
gwHDD: +11 → +7
JEPX · 5 Jul
JEPX Tokyo day-ahead area price on file at ¥20.0/kWh. Day-ahead settles are independent day to day — level shown as context only.
JEPX Tokyo ¥20.0/kWh
TTF (EEX settle)
57.51€/MWh
0.0%
Newcastle coal
119.70$/t
0.0%
JEPX Tokyo · DA
¥20.0/kWh
as of 5 Jul
as of 5 Jul
NEM NSW1 · DA
A$86/MWh
as of 5 Jul
as of 5 Jul
JEPX and NEM day-ahead prices settle independently each day — no day-on-day change is shown for them. Levels are context for the physical read, not a price view.

Trajectory — where the forecast is heading

run-to-run comparison · stored model cycles
Japan 15-day gwCDD by run · vs 10-yr normal
19 Jul run
+29
19 Jul run
+47
Zero line = 10-yr normal. Run-on-run the anomaly moved +18 gwCDD.

A reinforced Pacific High is anchoring anomalous heat over Chubu, driving CDD15 to 192.85 against a seasonal normal of 154.125 — a +38.7 surplus consistent with the HEAT_SURGE regime and El Niño-biased (Nino3.4 +2.30) warm advection from the western Pacific. Cooling demand is accelerating — CDD15 has risen from 170.35 to 192.85 against a normal of 154.125, with the anomaly widening run-to-run, signalling a continuing rather than plateauing heat load.Desk zone brief — Chubu · generated 18 Jul 21:41 UTC

A cross-Tasman frontal sequence is driving above-normal heating demand across New South Wales, with the 15-day HDD accumulation of 90.45 running 13.9 units above the seasonal normal of 76.54 — consistent with the positive SAM state (+2.79) steering successive cold fronts across the southeast and suppressing interior warming. Negative IOD (-0.22) reinforces the cool maritime influence on the eastern seaboard. The heating signal has edged marginally higher from 89.35 to 90.45, indicating the cold pattern is sustaining rather than retreating, with no meaningful reversal in run-to-run momentum.Desk zone brief — New South Wales · generated 18 Jul 21:46 UTC

Where the anomaly sits

15-day cumulative degree-day anomaly, demand-weighted zones · markers = where it prices
Japan
JEPX area prices · gas-weighted CDD vs 10-yr normal
Tokyo Chubu Kansai +37 CDD +62 CDD +52 CDD
Strong demand + Demand + Near normal Demand −
Colour = physical demand vs normal, never a price view. Country fill = demand-weighted national anomaly (strong demand +).
Zone · area
CDD 15-day
vs normal
run Δ
JEPX DA
1
Chubu
JEPX Chubu · JKM
218
+62
+19
¥17.9/kWh
2
Kansai
JEPX Kansai · JKM
218
+52
+28
¥13.9/kWh
3
Tokyo
JEPX Tokyo · JKM
187
+37
+11
¥20.0/kWh

Anomaly = 15-day cumulative CDD vs the 10-yr Open-Meteo archive, weighted by JEPX-area demand share. No zone inside the ±5 band is treated as pricing-relevant.

Australia
NEM regions, winter · heating degree days vs 10-yr normal
New South Wales Queensland Victoria South Australia +19 HDD +3 HDD -2 HDD +2 HDD
Strong demand + Demand + Near normal Demand −
Colour = physical demand vs normal, never a price view. Country fill = demand-weighted national anomaly (demand +).
Region · driver
HDD 15-day
vs normal
run Δ
NEM DA
1
New South Wales
AEMO NSW1
95
+19
+2
A$86/MWh
2
Queensland
AEMO QLD1
36
+3
-7
A$75/MWh
3
South Australia
AEMO SA1
100
+2
-11
A$140/MWh
4
Victoria
AEMO VIC1
115
-2
-4
A$72/MWh

Winter frame: anomalies are 15-day cumulative HDD against the 10-yr archive, weighted by NEM regional demand share. Day-ahead RRP levels are context only — independent daily settles, never compared day-on-day.

The balance — Japan gas stocks against their recent path

JODI monthly · national closing stocks · data month Mar 2026
Japan closing gas stocks 285 PJ · JODI monthly, Mar 2026Apr 2024 — Mar 2026
239 PJ 274 PJ 309 PJ Jul 24 Jan 25 Jul 25 Jan 26 285 PJ · Mar 2026
— monthly closing stocks, realised 34 PJ above the prior-5-yr Mar average of 251 PJ. JODI monthly national closing stocks (all gas, TJ → PJ) — a monthly, two-to-three-month-lagged proxy. METI weekly utility LNG stocks are not yet ingested; when they are, this card switches to that series.

What would change the read

published tripwires · watched, not forecast
Regime: active — 1 of 3 tripwires liveState classification only; thresholds are fixed, not tuned per day.
Japan heat event (gwCDD, 15-day vs normal)
Open-Meteo zone basket · trips at +10
trips at +10
Tripped · +47
threshold cleared
NEM cold surge (gwHDD, 15-day vs normal)
Open-Meteo zone basket · trips at +10
trips at +10
Quiet · +7
3 gwHDD from tripping
SAM opens the southern door (SAM ≤ -1.0)
Marshall/NOAA index · 2026-06-30
trips at -1.0
Quiet · +2.79
+3.79 from tripping
Thresholds are fixed, not tuned per day. Each is the same number an alert would fire on.

Method: anomalies are 15-day cumulative gas-/demand-weighted degree days vs the 10-yr Open-Meteo archive (Japan weighted by JEPX-area demand share, Australia by NEM regional demand share; weights are launch approximations pending certification). Australia renders in its winter (heating) frame, chosen from the data. Japan stocks are JODI monthly national closing stocks — a lagged proxy, labelled with its data month. Direction and mechanism only, site-wide — no trade calls, no targets. A quiet morning renders as a quiet page: missing feeds are omitted, flat signals are published as flat.