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Data as of 2026-10-27
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Built 2026-10-28 (28 October 2026)

SPP Daily Load Shape and Duck Curve by Hour, 29 September to 27 October 2026

In the 29 complete local days from 29 September to 27 October 2026, electricity demand in SPP averaged 32,485 MW and typically peaked at 16:00 local time (36,867 MW) and bottomed out at 03:00 (27,855 MW). With solar and wind taken off, the remaining load fell to 13,235 MW at 01:00 and then rose 1,128 MW between 14:00 to 17:00. Hours are local clock time (America/Chicago).

Key Facts

  • Over 29 complete local days from 29 September to 27 October 2026, average demand in SPP was 32,485 MW. The hour of the day with the highest average demand was 16:00 local time (36,867 MW) and the lowest was 03:00 (27,855 MW).
  • The largest three hour rise in average demand was 839 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 45,166 MW, in the hour starting 12 Oct 2026, 16:00 CDT (UTC-05:00).
  • Solar output averaged 2,094 MW at its 15:00 peak, 6% of average demand.
  • Demand minus solar and wind (net load) averaged 17,997 MW, fell to 13,235 MW at 01:00 and rose 1,128 MW over the three hours from 14:00 to 17:00, 3% of average demand.

Average Day by Local Hour

29 days to 2026-10-27, America/Chicago time
SPP average demand and net generation by local hour Average electricity demand in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 03:00 (27,855 MW) and highest at 16:00 (36,867 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 10,000 20,000 30,000 40,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 03:00 (27,855 MW) and highest at 16:00 (36,867 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-09-29 to 2026-10-27
SPP average demand and net generation by local hour
Local hour (America/Chicago)DemandNet generation
00:0029,454 MW30,486 MW
01:0028,657 MW29,680 MW
02:0028,128 MW29,102 MW
03:0027,855 MW28,790 MW
04:0027,941 MW28,874 MW
05:0028,602 MW29,685 MW
06:0029,958 MW31,013 MW
07:0030,967 MW31,861 MW
08:0031,418 MW31,885 MW
09:0031,963 MW31,796 MW
10:0032,727 MW32,280 MW
11:0033,558 MW33,113 MW
12:0034,402 MW33,927 MW
13:0035,283 MW34,775 MW
14:0035,965 MW35,485 MW
15:0036,515 MW36,135 MW
16:0036,867 MW36,797 MW
17:0036,804 MW37,255 MW
18:0036,176 MW37,054 MW
19:0035,642 MW36,810 MW
20:0034,716 MW35,838 MW
21:0033,490 MW34,585 MW
22:0032,010 MW33,109 MW
23:0030,530 MW31,580 MW
SPP duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 01:00 (13,235 MW) and then rose 1,128 MW between 14:00 to 17:00. 0 10,000 20,000 30,000 40,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 01:00 (13,235 MW) and then rose 1,128 MW between 14:00 to 17:00.
Mean MW by local hour, 2026-09-29 to 2026-10-27
SPP duck curve: demand and net load by local hour
Local hour (America/Chicago)DemandNet load (demand minus solar and wind)
00:0029,454 MW13,570 MW
01:0028,657 MW13,235 MW
02:0028,128 MW13,272 MW
03:0027,855 MW13,377 MW
04:0027,941 MW13,764 MW
05:0028,602 MW14,580 MW
06:0029,958 MW15,958 MW
07:0030,967 MW17,049 MW
08:0031,418 MW17,344 MW
09:0031,963 MW18,578 MW
10:0032,727 MW19,766 MW
11:0033,558 MW20,051 MW
12:0034,402 MW20,506 MW
13:0035,283 MW21,131 MW
14:0035,965 MW21,632 MW
15:0036,515 MW21,989 MW
16:0036,867 MW22,314 MW
17:0036,804 MW22,760 MW
18:0036,176 MW23,095 MW
19:0035,642 MW21,455 MW
20:0034,716 MW19,207 MW
21:0033,490 MW17,221 MW
22:0032,010 MW15,559 MW
23:0030,530 MW14,514 MW
SPP average solar and wind output by local hour Average solar and wind generation in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 15:00 at 2,094 MW. 0 5,000 10,000 15,000 20,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in SPP by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 15:00 at 2,094 MW.
Mean MW by local hour, 2026-09-29 to 2026-10-27
SPP average solar and wind output by local hour
Local hour (America/Chicago)SolarWind
00:000 MW15,884 MW
01:000 MW15,422 MW
02:000 MW14,855 MW
03:000 MW14,479 MW
04:000 MW14,178 MW
05:000 MW14,022 MW
06:000 MW14,000 MW
07:0019 MW13,899 MW
08:00576 MW13,498 MW
09:001,626 MW11,759 MW
10:002,011 MW10,950 MW
11:002,078 MW11,429 MW
12:002,080 MW11,816 MW
13:002,080 MW12,073 MW
14:002,091 MW12,243 MW
15:002,094 MW12,432 MW
16:001,960 MW12,594 MW
17:001,389 MW12,655 MW
18:00368 MW12,713 MW
19:006 MW14,181 MW
20:000 MW15,508 MW
21:000 MW16,269 MW
22:000 MW16,451 MW
23:000 MW16,015 MW
Average SPP demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 29,454 MW 30,486 MW 0 MW 15,884 MW 13,570 MW
01:00 28,657 MW 29,680 MW 0 MW 15,422 MW 13,235 MW
02:00 28,128 MW 29,102 MW 0 MW 14,855 MW 13,272 MW
03:00 27,855 MW 28,790 MW 0 MW 14,479 MW 13,377 MW
04:00 27,941 MW 28,874 MW 0 MW 14,178 MW 13,764 MW
05:00 28,602 MW 29,685 MW 0 MW 14,022 MW 14,580 MW
06:00 29,958 MW 31,013 MW 0 MW 14,000 MW 15,958 MW
07:00 30,967 MW 31,861 MW 19 MW 13,899 MW 17,049 MW
08:00 31,418 MW 31,885 MW 576 MW 13,498 MW 17,344 MW
09:00 31,963 MW 31,796 MW 1,626 MW 11,759 MW 18,578 MW
10:00 32,727 MW 32,280 MW 2,011 MW 10,950 MW 19,766 MW
11:00 33,558 MW 33,113 MW 2,078 MW 11,429 MW 20,051 MW
12:00 34,402 MW 33,927 MW 2,080 MW 11,816 MW 20,506 MW
13:00 35,283 MW 34,775 MW 2,080 MW 12,073 MW 21,131 MW
14:00 35,965 MW 35,485 MW 2,091 MW 12,243 MW 21,632 MW
15:00 36,515 MW 36,135 MW 2,094 MW 12,432 MW 21,989 MW
16:00 36,867 MW 36,797 MW 1,960 MW 12,594 MW 22,314 MW
17:00 36,804 MW 37,255 MW 1,389 MW 12,655 MW 22,760 MW
18:00 36,176 MW 37,054 MW 368 MW 12,713 MW 23,095 MW
19:00 35,642 MW 36,810 MW 6 MW 14,181 MW 21,455 MW
20:00 34,716 MW 35,838 MW 0 MW 15,508 MW 19,207 MW
21:00 33,490 MW 34,585 MW 0 MW 16,269 MW 17,221 MW
22:00 32,010 MW 33,109 MW 0 MW 16,451 MW 15,559 MW
23:00 30,530 MW 31,580 MW 0 MW 16,015 MW 14,514 MW

Each value is the mean over 29 complete local days from 29 September to 27 October 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 45,166 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 2026-10-27. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/Chicago. 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.
Cite this page
APA 7

World Power Monitor. (2026). SPP Daily Load Shape and Duck Curve by Hour. https://worldpowermonitor.com/load-shapes/spp/

Plain text

World Power Monitor. SPP Daily Load Shape and Duck Curve by Hour. Data as of 2026-10-27. Data from U.S. Energy Information Administration. https://worldpowermonitor.com/load-shapes/spp/

BibTeX 
@misc{wpm_load_shapes_spp_2026,
  title = {{SPP Daily Load Shape and Duck Curve by Hour}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-10-27. Data from U.S. Energy Information Administration.},
  url = {https://worldpowermonitor.com/load-shapes/spp/}
}

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