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Data as of 2026-09-19
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Built 2026-09-21 (21 September 2026)

NWMT Daily Load Shape and Duck Curve by Hour, 22 August to 19 September 2026

In the 29 complete local days from 22 August to 19 September 2026, electricity demand in NWMT averaged 1,296 MW and typically peaked at 18:00 local time (1,473 MW) and bottomed out at 03:00 (1,104 MW). With solar and wind taken off, the remaining load fell to 444 MW at 04:00 and then rose 97 MW between 15:00 to 18:00. Hours are local clock time (America/Denver).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in NWMT was 1,296 MW. The hour of the day with the highest average demand was 18:00 local time (1,473 MW) and the lowest was 03:00 (1,104 MW).
  • The largest three hour rise in average demand was 82 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 1,801 MW, in the hour starting 26 Aug 2026, 17:00 MDT (UTC-06:00).
  • Solar output averaged 113 MW at its 11:00 peak, 9% of average demand.
  • Demand minus solar and wind (net load) averaged 708 MW, fell to 444 MW at 04:00 and rose 97 MW over the three hours from 15:00 to 18:00, 7% of average demand.

Average Day by Local Hour

29 days to 2026-09-19, America/Denver time
NWMT average demand and net generation by local hour Average electricity demand in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 03:00 (1,104 MW) and highest at 18:00 (1,473 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 750 1,500 2,250 3,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 03:00 (1,104 MW) and highest at 18:00 (1,473 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-08-22 to 2026-09-19
NWMT average demand and net generation by local hour
Local hour (America/Denver)DemandNet generation
00:001,165 MW2,526 MW
01:001,130 MW2,501 MW
02:001,111 MW2,486 MW
03:001,104 MW2,499 MW
04:001,110 MW2,494 MW
05:001,144 MW2,497 MW
06:001,215 MW2,500 MW
07:001,264 MW2,538 MW
08:001,297 MW2,454 MW
09:001,298 MW2,369 MW
10:001,304 MW2,321 MW
11:001,317 MW2,334 MW
12:001,335 MW2,349 MW
13:001,359 MW2,369 MW
14:001,388 MW2,396 MW
15:001,417 MW2,430 MW
16:001,448 MW2,464 MW
17:001,470 MW2,504 MW
18:001,473 MW2,547 MW
19:001,455 MW2,563 MW
20:001,431 MW2,585 MW
21:001,370 MW2,617 MW
22:001,283 MW2,595 MW
23:001,205 MW2,510 MW
NWMT duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 04:00 (444 MW) and then rose 97 MW between 15:00 to 18:00. 0 375 750 1,125 1,500 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 04:00 (444 MW) and then rose 97 MW between 15:00 to 18:00.
Mean MW by local hour, 2026-08-22 to 2026-09-19
NWMT duck curve: demand and net load by local hour
Local hour (America/Denver)DemandNet load (demand minus solar and wind)
00:001,165 MW581 MW
01:001,130 MW535 MW
02:001,111 MW502 MW
03:001,104 MW462 MW
04:001,110 MW444 MW
05:001,144 MW486 MW
06:001,215 MW581 MW
07:001,264 MW645 MW
08:001,297 MW707 MW
09:001,298 MW703 MW
10:001,304 MW743 MW
11:001,317 MW743 MW
12:001,335 MW756 MW
13:001,359 MW779 MW
14:001,388 MW811 MW
15:001,417 MW839 MW
16:001,448 MW872 MW
17:001,470 MW893 MW
18:001,473 MW936 MW
19:001,455 MW948 MW
20:001,431 MW895 MW
21:001,370 MW794 MW
22:001,283 MW701 MW
23:001,205 MW639 MW
NWMT average solar and wind output by local hour Average solar and wind generation in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 11:00 at 113 MW. 0 200 400 600 800 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in NWMT by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 11:00 at 113 MW.
Mean MW by local hour, 2026-08-22 to 2026-09-19
NWMT average solar and wind output by local hour
Local hour (America/Denver)SolarWind
00:000 MW585 MW
01:000 MW596 MW
02:000 MW610 MW
03:000 MW642 MW
04:000 MW666 MW
05:000 MW658 MW
06:000 MW633 MW
07:0015 MW604 MW
08:0066 MW524 MW
09:00103 MW492 MW
10:00109 MW453 MW
11:00113 MW461 MW
12:00113 MW466 MW
13:00113 MW467 MW
14:00111 MW466 MW
15:00103 MW475 MW
16:0090 MW486 MW
17:0082 MW495 MW
18:0046 MW491 MW
19:007 MW500 MW
20:000 MW536 MW
21:000 MW576 MW
22:000 MW582 MW
23:000 MW567 MW
Average NWMT demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 1,165 MW 2,526 MW 0 MW 585 MW 581 MW
01:00 1,130 MW 2,501 MW 0 MW 596 MW 535 MW
02:00 1,111 MW 2,486 MW 0 MW 610 MW 502 MW
03:00 1,104 MW 2,499 MW 0 MW 642 MW 462 MW
04:00 1,110 MW 2,494 MW 0 MW 666 MW 444 MW
05:00 1,144 MW 2,497 MW 0 MW 658 MW 486 MW
06:00 1,215 MW 2,500 MW 0 MW 633 MW 581 MW
07:00 1,264 MW 2,538 MW 15 MW 604 MW 645 MW
08:00 1,297 MW 2,454 MW 66 MW 524 MW 707 MW
09:00 1,298 MW 2,369 MW 103 MW 492 MW 703 MW
10:00 1,304 MW 2,321 MW 109 MW 453 MW 743 MW
11:00 1,317 MW 2,334 MW 113 MW 461 MW 743 MW
12:00 1,335 MW 2,349 MW 113 MW 466 MW 756 MW
13:00 1,359 MW 2,369 MW 113 MW 467 MW 779 MW
14:00 1,388 MW 2,396 MW 111 MW 466 MW 811 MW
15:00 1,417 MW 2,430 MW 103 MW 475 MW 839 MW
16:00 1,448 MW 2,464 MW 90 MW 486 MW 872 MW
17:00 1,470 MW 2,504 MW 82 MW 495 MW 893 MW
18:00 1,473 MW 2,547 MW 46 MW 491 MW 936 MW
19:00 1,455 MW 2,563 MW 7 MW 500 MW 948 MW
20:00 1,431 MW 2,585 MW 0 MW 536 MW 895 MW
21:00 1,370 MW 2,617 MW 0 MW 576 MW 794 MW
22:00 1,283 MW 2,595 MW 0 MW 582 MW 701 MW
23:00 1,205 MW 2,510 MW 0 MW 567 MW 639 MW

Each value is the mean over 29 complete local days from 22 August to 19 September 2026, weekdays and weekends together, for the hour starting at that local clock time. Net load is demand minus solar and wind generation. The single highest hour of demand in the whole 30 day window was 1,801 MW; it is a published reading, not an average, and is not part of the profile above.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-09-19. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/Denver. A local day is used only if it is whole inside the 30 day window and at least 22 of its hours are complete; the profile uses the 29 most recent such days. Daylight saving follows the local clock: on a clock change day the missing hour is absent and the repeated hour is averaged over both readings.
  • The average mixes weekdays and weekends and covers only 29 days, so it describes recent conditions, not a seasonal norm.
  • The evening ramp is the largest rise over three hours in the average profile, starting between 14:00 and 20:00 local time.