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Data as of 2026-11-05
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Built 2026-11-05 (5 November 2026)

SC Demand Forecast Accuracy: Error, Bias and Worst Miss, 6 October to 5 November 2026

The day-ahead demand forecast for SC was off by 4.5% on average (mean absolute percentage error) over 694 hours from 6 October to 5 November 2026, and 64% of hours landed within 5% of the reading. Its bias was +3.6%: it ran high on average, an over forecast. The largest miss was 1,530 MW (130.0%) too high at 12 Oct 2026, 01:00 EDT (UTC-04:00). Dates and times are local (America/New_York).

Key Facts

  • The day-ahead demand forecast for SC was off by 4.5% on average (mean absolute percentage error) over 694 hours from 6 October to 5 November 2026, and 64% of hours landed within 5% of the reading. Its bias was +3.6%: it ran high on average, an over forecast. The largest miss was 1,530 MW (130.0%) too high at 12 Oct 2026, 01:00 EDT (UTC-04:00).
  • Across 53 US grids ranked by average error over their own latest 30 day windows, SC came 30 (1 is the smallest error).
  • On average the forecast differed from reported demand by 126 MW, against average demand of 2,905 MW.
  • The forecast was above reported demand in 77% of compared hours.

Forecast Error at a Glance

694 hours from 6 October to 5 November 2026
Average error4.5%
Bias+3.6%
Hours within 5%64%
Worst miss1,530 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (+99 MW per hour on average): the forecast ran high on average, an over forecast. The worst miss was 1,530 MW (130.0%) too high at 12 Oct 2026, 01:00 EDT (UTC-04:00): forecast 2,707 MW, reported 1,177 MW.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-11-05. Accuracy is computed by World Power Monitor from the operator's hourly forecast and reported demand.

Forecast and Reported Demand, Last 7 Days

Local time, to 5 Nov 2026, 08:00 EST (UTC-05:00)
SC day-ahead demand forecast and reported demand by hour Hourly reported demand and the day-ahead forecast for SC over the last 7 days of the window, to 5 Nov 2026, 08:00 EST (UTC-05:00). Gaps are hours with a missing, zero or implausible report. 0 1,000 2,000 3,000 4,000 29 Oct, 10:0030 Oct, 10:0031 Oct, 10:001 Nov, 09:002 Nov, 09:003 Nov, 09:004 Nov, 09:00
Hourly reported demand and the day-ahead forecast for SC over the last 7 days of the window, to 5 Nov 2026, 08:00 EST (UTC-05:00). Gaps are hours with a missing, zero or implausible report.
Data to 2026-11-05
Show the data table (168 rows)
Local hourReported demandDay-ahead forecast
29 Oct, 10:002,909 MW2,845 MW
29 Oct, 11:002,920 MW2,876 MW
29 Oct, 12:003,000 MW2,948 MW
29 Oct, 13:003,145 MW3,003 MW
29 Oct, 14:003,154 MW3,106 MW
29 Oct, 15:003,214 MW3,178 MW
29 Oct, 16:003,187 MW3,234 MW
29 Oct, 17:003,235 MW3,265 MW
29 Oct, 18:003,267 MW3,302 MW
29 Oct, 19:003,280 MW3,309 MW
29 Oct, 20:003,114 MW3,296 MW
29 Oct, 21:002,995 MW3,191 MW
29 Oct, 22:002,849 MW3,048 MW
29 Oct, 23:002,588 MW2,872 MW
30 Oct, 00:002,466 MW2,683 MW
30 Oct, 01:002,438 MW2,579 MW
30 Oct, 02:002,417 MW2,460 MW
30 Oct, 03:002,309 MW2,419 MW
30 Oct, 04:002,349 MW2,446 MW
30 Oct, 05:002,568 MW2,494 MW
30 Oct, 06:002,761 MW2,658 MW
30 Oct, 07:002,855 MW2,775 MW
30 Oct, 08:002,879 MW2,801 MW
30 Oct, 09:002,911 MW2,861 MW
30 Oct, 10:002,858 MW2,859 MW
30 Oct, 11:002,964 MW2,862 MW
30 Oct, 12:003,048 MW2,934 MW
30 Oct, 13:003,092 MW2,985 MW
30 Oct, 14:003,135 MW3,094 MW
30 Oct, 15:003,228 MW3,201 MW
30 Oct, 16:003,283 MW3,304 MW
30 Oct, 17:003,226 MW3,322 MW
30 Oct, 18:003,148 MW3,311 MW
30 Oct, 19:003,153 MW3,280 MW
30 Oct, 20:003,009 MW3,233 MW
30 Oct, 21:002,929 MW3,106 MW
30 Oct, 22:002,816 MW2,980 MW
30 Oct, 23:002,695 MW2,842 MW
31 Oct, 00:002,502 MW2,668 MW
31 Oct, 01:002,514 MW2,492 MW
31 Oct, 02:002,448 MW2,355 MW
31 Oct, 03:002,436 MW2,373 MW
31 Oct, 04:002,453 MW2,364 MW
31 Oct, 05:002,344 MW2,394 MW
31 Oct, 06:002,444 MW2,404 MW
31 Oct, 07:002,499 MW2,538 MW
31 Oct, 08:002,639 MW2,652 MW
31 Oct, 09:002,710 MW2,741 MW
31 Oct, 10:002,846 MW2,739 MW
31 Oct, 11:002,866 MW2,781 MW
31 Oct, 12:002,909 MW2,825 MW
31 Oct, 13:002,934 MW2,818 MW
31 Oct, 14:002,877 MW2,818 MW
31 Oct, 15:002,928 MW2,815 MW
31 Oct, 16:002,905 MW2,798 MW
31 Oct, 17:002,874 MW2,781 MW
31 Oct, 18:002,888 MW2,818 MW
31 Oct, 19:002,828 MW2,891 MW
31 Oct, 20:002,846 MW2,900 MW
31 Oct, 21:002,780 MW2,836 MW
31 Oct, 22:002,729 MW2,774 MW
31 Oct, 23:002,627 MW2,642 MW
1 Nov, 00:002,627 MWn/a
1 Nov, 01:002,528 MWn/a
1 Nov, 01:002,311 MWn/a
1 Nov, 02:002,349 MWn/a
1 Nov, 03:002,367 MWn/a
1 Nov, 04:002,438 MWn/a
1 Nov, 05:002,548 MWn/a
1 Nov, 06:002,677 MWn/a
1 Nov, 07:002,767 MWn/a
1 Nov, 08:002,755 MWn/a
1 Nov, 09:002,811 MWn/a
1 Nov, 10:002,822 MWn/a
1 Nov, 11:002,845 MWn/a
1 Nov, 12:002,869 MWn/a
1 Nov, 13:002,896 MWn/a
1 Nov, 14:002,866 MWn/a
1 Nov, 15:002,887 MWn/a
1 Nov, 16:002,977 MWn/a
1 Nov, 17:002,993 MWn/a
1 Nov, 18:002,977 MWn/a
1 Nov, 19:002,921 MWn/a
1 Nov, 20:002,795 MWn/a
1 Nov, 21:002,684 MWn/a
1 Nov, 22:002,545 MWn/a
1 Nov, 23:002,545 MWn/a
2 Nov, 00:002,497 MW2,570 MW
2 Nov, 01:002,367 MW2,483 MW
2 Nov, 02:002,438 MW2,416 MW
2 Nov, 03:002,412 MW2,386 MW
2 Nov, 04:002,469 MW2,438 MW
2 Nov, 05:002,389 MW2,505 MW
2 Nov, 06:002,571 MW2,715 MW
2 Nov, 07:002,722 MW2,796 MW
2 Nov, 08:002,772 MW2,830 MW
2 Nov, 09:002,843 MW2,893 MW
2 Nov, 10:002,916 MW2,910 MW
2 Nov, 11:002,926 MW2,949 MW
2 Nov, 12:002,968 MW2,986 MW
2 Nov, 13:003,019 MW2,997 MW
2 Nov, 14:003,033 MW2,994 MW
2 Nov, 15:003,054 MW2,983 MW
2 Nov, 16:003,092 MW3,005 MW
2 Nov, 17:003,110 MW3,109 MW
2 Nov, 18:003,142 MW3,225 MW
2 Nov, 19:003,094 MW3,223 MW
2 Nov, 20:003,039 MW3,159 MW
2 Nov, 21:002,817 MW3,079 MW
2 Nov, 22:002,742 MW2,953 MW
2 Nov, 23:002,643 MW2,782 MW
3 Nov, 00:002,519 MW2,641 MW
3 Nov, 01:002,480 MW2,519 MW
3 Nov, 02:002,443 MW2,428 MW
3 Nov, 03:002,465 MW2,390 MW
3 Nov, 04:002,487 MW2,440 MW
3 Nov, 05:002,554 MW2,498 MW
3 Nov, 06:002,657 MW2,636 MW
3 Nov, 07:002,659 MW2,755 MW
3 Nov, 08:002,715 MW2,817 MW
3 Nov, 09:002,806 MW2,889 MW
3 Nov, 10:002,929 MW2,956 MW
3 Nov, 11:003,059 MW3,016 MW
3 Nov, 12:003,104 MW3,072 MW
3 Nov, 13:003,139 MW3,142 MW
3 Nov, 14:003,215 MW3,156 MW
3 Nov, 15:003,172 MW3,160 MW
3 Nov, 16:003,181 MW3,166 MW
3 Nov, 17:003,219 MW3,229 MW
3 Nov, 18:003,222 MW3,302 MW
3 Nov, 19:003,190 MW3,286 MW
3 Nov, 20:003,089 MW3,175 MW
3 Nov, 21:002,927 MW3,096 MW
3 Nov, 22:002,780 MW2,968 MW
3 Nov, 23:002,558 MW2,813 MW
4 Nov, 00:002,526 MW2,602 MW
4 Nov, 01:002,498 MW2,484 MW
4 Nov, 02:002,471 MW2,434 MW
4 Nov, 03:002,470 MW2,400 MW
4 Nov, 04:002,450 MW2,289 MW
4 Nov, 05:002,483 MW2,437 MW
4 Nov, 06:002,654 MW2,599 MW
4 Nov, 07:002,626 MW2,706 MW
4 Nov, 08:002,639 MW2,740 MW
4 Nov, 09:002,753 MW2,818 MW
4 Nov, 10:002,814 MW2,890 MW
4 Nov, 11:002,919 MW2,956 MW
4 Nov, 12:003,037 MW3,043 MW
4 Nov, 13:003,127 MW3,119 MW
4 Nov, 14:003,210 MW3,219 MW
4 Nov, 15:003,223 MW3,230 MW
4 Nov, 16:003,264 MW3,234 MW
4 Nov, 17:003,261 MW3,294 MW
4 Nov, 18:003,340 MW3,348 MW
4 Nov, 19:003,199 MW3,326 MW
4 Nov, 20:003,152 MW3,218 MW
4 Nov, 21:002,951 MW3,132 MW
4 Nov, 22:002,866 MW2,993 MW
4 Nov, 23:002,743 MW2,837 MW
5 Nov, 00:002,676 MW2,649 MW
5 Nov, 01:002,588 MW2,559 MW
5 Nov, 02:002,552 MW2,467 MW
5 Nov, 03:002,527 MW2,460 MW
5 Nov, 04:002,562 MW2,481 MW
5 Nov, 05:002,622 MW2,544 MW
5 Nov, 06:002,804 MW2,691 MW
5 Nov, 07:002,826 MW2,786 MW
5 Nov, 08:002,943 MW2,814 MW

Assumptions

  • Only hours with both a forecast and a positive demand reading count (694 of 720 hours in the window). Missing and zero values, and readings under 30% or over 3 times the grid's own median for the window, are treated as reporting faults and left out.
  • Error is (forecast minus reported demand) divided by reported demand; average error uses absolute values so high and low misses do not cancel. Bias keeps the sign and does cancel.
  • Reported demand is preliminary and may be revised. A 30 day window is a short sample and one heat wave or holiday can move these figures.
  • US figures are for the EIA balancing authority or region named on this page. US and European grids are ranked separately.
Cite this page
APA 7

World Power Monitor. (2026). SC Demand Forecast Accuracy: Error, Bias and Worst Miss. https://worldpowermonitor.com/forecast-accuracy/sc/

Plain text

World Power Monitor. SC Demand Forecast Accuracy: Error, Bias and Worst Miss. Data as of 2026-11-05. Data from U.S. Energy Information Administration. https://worldpowermonitor.com/forecast-accuracy/sc/

BibTeX 
@misc{wpm_forecast_accuracy_sc_2026,
  title = {{SC Demand Forecast Accuracy: Error, Bias and Worst Miss}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-11-05. Data from U.S. Energy Information Administration.},
  url = {https://worldpowermonitor.com/forecast-accuracy/sc/}
}

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