Tomorrow.ioTomorrow.io THE ATMOSPHERE TODAY · DESK← TODAY'S COVER
DESK

⚡Energy

Sep 15, 2026 · NO. 0915
THE READ — what this desk must decide today

cooling load in one hemisphere, heating load booked for Wednesday in the other

Two opposite loads, forty-eight hours apart. The American mid-South holds a 105–110 °F index across nine states, which is cooling demand on a grid whose severe risk stepped down to a Marginal — load without much outage pressure, for one more day. In the Southern Hemisphere the opposite is booked: Argentina's fresh Antarctic front peaks Wednesday with sectors to −10 °C and Chubut gusts above 85 km/h, and New Zealand's snow lands the same day above 600 m — heating demand and line-exposure arriving together on a single midweek date. In Vietnam, flooding across the delta is a distribution-interruption problem before it is a generation one.

THE DRIVERS 1–12h — what is driving this desk today
UNITED STATES — THE MID-SOUTH HEAT REGIME HELD: 0 EXTREME HEAT WARNINGS, 12 HEAT ADVISORIES AT A 105-110 F INDEX ACROSS NINE STATESACTIVE→VIETNAM — THE FLOOD TOLD TO TAPER TODAY EXPANDED NORTH INSTEAD: 200-400 MM ISOLATED ABOVE 500 OVER HANOI, NINH BÌNH AND THANH HÓA, BẠCH MÃ PAST 680 MM, ~200 COMMUNES WARNED, 712 HOUSEHOLDS MOVEDPEAK→ARGENTINA — THE EXTREME-COLD ALERT CLEARED ENTIRELY TODAY WITH NO PROVINCE AT OR BELOW 0 C, AND A FRESH ANTARCTIC FRONT PEAKS WEDNESDAY OVER N SANTA CRUZ, CHUBUT, C RÍO NEGRO AND S NEUQUÉNBUILDING→NEW ZEALAND — THE COLD SNAP ARRIVES WEDNESDAY ON SCHEDULE: HEAVY SNOW WATCH ABOVE 600 M FOR CENTRAL OTAGO, THE SOUTHERN LAKES AND THE MACKENZIE BASIN, PLUS ROAD SNOWFALL WARNINGS AND A FIORDLAND RAIN WATCHEMERGING→UNITED STATES — FORECASTERS STEPPED SUNDAY'S SLIGHT DOWN TO A MARGINAL WIND DAY ACROSS THE SOUTH-CENTRAL PLAINS INTO THE MIDWEST, PLUS A SEPARATE MARGINAL OVER UTAH AND WESTERN COLORADOEASING→
THE RECORD past — how exposed this desk has run

carried on 38 of the last 61 editions — since Jul 5, the 10 most recent shown.

Sep 15THE MID-SOUTH HEAT REGIME HELD: 0 … · THE FLOOD TOLD TO TAPER TODAY EXPA… · THE EXTREME-COLD ALERT CLEARED ENT…
Sep 13THE ACUTE TIER HELD AT ZERO A SECO… · A MARGINAL DAY FOR DAMAGING WIND A… · THE POLAR PHASE TOOK OVER: YELLOW …
Sep 12THE ACUTE TIER READ ZERO · RED-FLAG WARNINGS ROSE 6 TO 10 AS … · THE WATER IS CERTAIN AND THE CAUSE…
Sep 11THE ACUTE-HEAT TIER COLLAPSED A SE… · A FINAL ADVISORY · A RED WARNING THAT WALKED SOUTH ON…
Sep 8A CATEGORY-2 LOWELL AT CLOSEST APP… · THE ACUTE-HEAT MAP RE-LIT: WARNING… · 28.0 CM
Aug 28KAUB STOPPED FALLING AT 60 CM · A SECOND ESTOFEX LEVEL 3 · RED FLAG FLIPPED OUT OF THE PACIFI…
Aug 27KAUB DOWN AGAIN TO 60 CM · AN ESTOFEX LEVEL 3 FOR TONIGHT · RED FLAG UP 4 TO 5 AND MOVED NORTH
Aug 25THE FIRST TOP-TIER HEAT-WAVE EMERG… · 25 EXTREME HEAT WARNINGS · KAUB UP AGAIN TO 74 CM AND STILL B…
Aug 24THE FIRST TOP-TIER HEAT-WAVE EMERG… · STILL 110 KT · KAUB SURGED 27 CM IN A DAY TO 70 CM
Aug 2314 EXTREME HEAT WARNINGS · KAUB RISES AGAIN TO 43 CM · A LEVEL-IV FLOOD EMERGENCY ACTIVAT…