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

WALC 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 WALC averaged 891 MW and typically peaked at 18:00 local time (1,170 MW) and bottomed out at 02:00 (699 MW). With solar and wind taken off, the remaining load fell to 600 MW at 07:00 and then rose 326 MW between 16:00 to 19:00. Hours are local clock time (America/Phoenix).

Key Facts

  • Over 29 complete local days from 29 September to 27 October 2026, average demand in WALC was 891 MW. The hour of the day with the highest average demand was 18:00 local time (1,170 MW) and the lowest was 02:00 (699 MW).
  • The largest three hour rise in average demand was 209 MW, between 16:00 to 19:00 local time.
  • The single highest hour of demand in the 30 day window was 1,505 MW, in the hour starting 7 Oct 2026, 17:00 MST (UTC-07:00).
  • Solar output averaged 163 MW at its 15:00 peak, 18% of average demand.
  • Demand minus solar and wind (net load) averaged 757 MW, fell to 600 MW at 07:00 and rose 326 MW over the three hours from 16:00 to 19:00, 37% of average demand.

Average Day by Local Hour

29 days to 2026-10-27, America/Phoenix time
WALC average demand and net generation by local hour Average electricity demand in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 02:00 (699 MW) and highest at 18:00 (1,170 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 500 1,000 1,500 2,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 02:00 (699 MW) and highest at 18:00 (1,170 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
WALC average demand and net generation by local hour
Local hour (America/Phoenix)DemandNet generation
00:00720 MW1,080 MW
01:00701 MW1,019 MW
02:00699 MW959 MW
03:00705 MW918 MW
04:00721 MW967 MW
05:00744 MW1,039 MW
06:00754 MW1,103 MW
07:00705 MW1,040 MW
08:00843 MW859 MW
09:00865 MW873 MW
10:00894 MW897 MW
11:00929 MW952 MW
12:00973 MW1,023 MW
13:00998 MW1,046 MW
14:001,014 MW1,084 MW
15:00999 MW1,133 MW
16:00935 MW1,244 MW
17:001,156 MW1,738 MW
18:001,170 MW1,817 MW
19:001,144 MW1,701 MW
20:001,048 MW1,589 MW
21:00984 MW1,528 MW
22:00902 MW1,398 MW
23:00784 MW1,240 MW
WALC duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 07:00 (600 MW) and then rose 326 MW between 16:00 to 19:00. 0 300 600 900 1,200 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 07:00 (600 MW) and then rose 326 MW between 16:00 to 19:00.
Mean MW by local hour, 2026-09-29 to 2026-10-27
WALC duck curve: demand and net load by local hour
Local hour (America/Phoenix)DemandNet load (demand minus solar and wind)
00:00720 MW645 MW
01:00701 MW643 MW
02:00699 MW639 MW
03:00705 MW647 MW
04:00721 MW659 MW
05:00744 MW687 MW
06:00754 MW687 MW
07:00705 MW600 MW
08:00843 MW686 MW
09:00865 MW692 MW
10:00894 MW699 MW
11:00929 MW712 MW
12:00973 MW742 MW
13:00998 MW759 MW
14:001,014 MW768 MW
15:00999 MW740 MW
16:00935 MW715 MW
17:001,156 MW1,005 MW
18:001,170 MW1,051 MW
19:001,144 MW1,041 MW
20:001,048 MW950 MW
21:00984 MW886 MW
22:00902 MW813 MW
23:00784 MW700 MW
WALC average solar and wind output by local hour Average solar and wind generation in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 15:00 at 163 MW. 0 50 100 150 200 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in WALC by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 15:00 at 163 MW.
Mean MW by local hour, 2026-09-29 to 2026-10-27
WALC average solar and wind output by local hour
Local hour (America/Phoenix)SolarWind
00:004 MW71 MW
01:000 MW58 MW
02:000 MW59 MW
03:000 MW58 MW
04:000 MW62 MW
05:001 MW56 MW
06:0011 MW56 MW
07:0045 MW60 MW
08:00102 MW55 MW
09:00113 MW60 MW
10:00117 MW78 MW
11:00129 MW88 MW
12:00138 MW93 MW
13:00143 MW96 MW
14:00150 MW96 MW
15:00163 MW96 MW
16:00120 MW100 MW
17:0060 MW90 MW
18:0039 MW80 MW
19:0025 MW78 MW
20:0019 MW79 MW
21:0016 MW82 MW
22:007 MW82 MW
23:004 MW79 MW
Average WALC demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 720 MW 1,080 MW 4 MW 71 MW 645 MW
01:00 701 MW 1,019 MW 0 MW 58 MW 643 MW
02:00 699 MW 959 MW 0 MW 59 MW 639 MW
03:00 705 MW 918 MW 0 MW 58 MW 647 MW
04:00 721 MW 967 MW 0 MW 62 MW 659 MW
05:00 744 MW 1,039 MW 1 MW 56 MW 687 MW
06:00 754 MW 1,103 MW 11 MW 56 MW 687 MW
07:00 705 MW 1,040 MW 45 MW 60 MW 600 MW
08:00 843 MW 859 MW 102 MW 55 MW 686 MW
09:00 865 MW 873 MW 113 MW 60 MW 692 MW
10:00 894 MW 897 MW 117 MW 78 MW 699 MW
11:00 929 MW 952 MW 129 MW 88 MW 712 MW
12:00 973 MW 1,023 MW 138 MW 93 MW 742 MW
13:00 998 MW 1,046 MW 143 MW 96 MW 759 MW
14:00 1,014 MW 1,084 MW 150 MW 96 MW 768 MW
15:00 999 MW 1,133 MW 163 MW 96 MW 740 MW
16:00 935 MW 1,244 MW 120 MW 100 MW 715 MW
17:00 1,156 MW 1,738 MW 60 MW 90 MW 1,005 MW
18:00 1,170 MW 1,817 MW 39 MW 80 MW 1,051 MW
19:00 1,144 MW 1,701 MW 25 MW 78 MW 1,041 MW
20:00 1,048 MW 1,589 MW 19 MW 79 MW 950 MW
21:00 984 MW 1,528 MW 16 MW 82 MW 886 MW
22:00 902 MW 1,398 MW 7 MW 82 MW 813 MW
23:00 784 MW 1,240 MW 4 MW 79 MW 700 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 1,505 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/Phoenix. 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). WALC Daily Load Shape and Duck Curve by Hour. https://worldpowermonitor.com/load-shapes/walc/

Plain text

World Power Monitor. WALC 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/walc/

BibTeX 
@misc{wpm_load_shapes_walc_2026,
  title = {{WALC 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/walc/}
}

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