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Built 2026-11-05 (5 November 2026)

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

The day-ahead demand forecast for SCEG was off by 4.8% on average (mean absolute percentage error) over 694 hours from 6 October to 5 November 2026, and 63% of hours landed within 5% of the reading. Its bias was -3.6%: it ran low on average, an under forecast. The largest miss was 583 MW (20.1%) too low at 21 Oct 2026, 13:00 EDT (UTC-04:00). Dates and times are local (America/New_York).

Key Facts

  • The day-ahead demand forecast for SCEG was off by 4.8% on average (mean absolute percentage error) over 694 hours from 6 October to 5 November 2026, and 63% of hours landed within 5% of the reading. Its bias was -3.6%: it ran low on average, an under forecast. The largest miss was 583 MW (20.1%) too low at 21 Oct 2026, 13:00 EDT (UTC-04:00).
  • Across 53 US grids ranked by average error over their own latest 30 day windows, SCEG came 33 (1 is the smallest error).
  • On average the forecast differed from reported demand by 126 MW, against average demand of 2,521 MW.
  • The forecast was above reported demand in 24% of compared hours.

Forecast Error at a Glance

694 hours from 6 October to 5 November 2026
Average error4.8%
Bias-3.6%
Hours within 5%63%
Worst miss583 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (-98 MW per hour on average): the forecast ran low on average, an under forecast. The worst miss was 583 MW (20.1%) too low at 21 Oct 2026, 13:00 EDT (UTC-04:00): forecast 2,319 MW, reported 2,902 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)
SCEG day-ahead demand forecast and reported demand by hour Hourly reported demand and the day-ahead forecast for SCEG 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 SCEG 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, 10:002,678 MW2,392 MW
29 Oct, 11:002,741 MW2,444 MW
29 Oct, 12:002,819 MW2,497 MW
29 Oct, 13:002,861 MW2,566 MW
29 Oct, 14:002,818 MW2,628 MW
29 Oct, 15:002,766 MW2,711 MW
29 Oct, 16:002,788 MW2,750 MW
29 Oct, 17:002,781 MW2,766 MW
29 Oct, 18:002,773 MW2,726 MW
29 Oct, 19:002,780 MW2,697 MW
29 Oct, 20:002,692 MW2,574 MW
29 Oct, 21:002,525 MW2,422 MW
29 Oct, 22:002,400 MW2,276 MW
29 Oct, 23:002,222 MW2,120 MW
30 Oct, 00:002,100 MW2,068 MW
30 Oct, 01:002,029 MW1,986 MW
30 Oct, 02:001,995 MW1,929 MW
30 Oct, 03:001,909 MW1,899 MW
30 Oct, 04:001,962 MW1,915 MW
30 Oct, 05:002,087 MW2,008 MW
30 Oct, 06:002,272 MW2,170 MW
30 Oct, 07:002,387 MW2,265 MW
30 Oct, 08:002,454 MW2,299 MW
30 Oct, 09:002,659 MW2,332 MW
30 Oct, 10:002,814 MW2,391 MW
30 Oct, 11:002,910 MW2,468 MW
30 Oct, 12:002,926 MW2,557 MW
30 Oct, 13:002,990 MW2,657 MW
30 Oct, 14:003,032 MW2,774 MW
30 Oct, 15:003,018 MW2,858 MW
30 Oct, 16:002,912 MW2,900 MW
30 Oct, 17:002,855 MW2,891 MW
30 Oct, 18:002,775 MW2,786 MW
30 Oct, 19:002,692 MW2,731 MW
30 Oct, 20:002,573 MW2,619 MW
30 Oct, 21:002,472 MW2,484 MW
30 Oct, 22:002,322 MW2,332 MW
30 Oct, 23:002,205 MW2,179 MW
31 Oct, 00:002,203 MW2,086 MW
31 Oct, 01:002,011 MW1,990 MW
31 Oct, 02:001,930 MW1,922 MW
31 Oct, 03:001,907 MW1,901 MW
31 Oct, 04:001,912 MW1,899 MW
31 Oct, 05:001,927 MW1,899 MW
31 Oct, 06:001,983 MW1,958 MW
31 Oct, 07:002,071 MW2,002 MW
31 Oct, 08:002,147 MW2,076 MW
31 Oct, 09:002,265 MW2,197 MW
31 Oct, 10:002,366 MW2,281 MW
31 Oct, 11:002,444 MW2,331 MW
31 Oct, 12:002,464 MW2,348 MW
31 Oct, 13:002,520 MW2,374 MW
31 Oct, 14:002,559 MW2,421 MW
31 Oct, 15:002,509 MW2,437 MW
31 Oct, 16:002,407 MW2,447 MW
31 Oct, 17:002,389 MW2,457 MW
31 Oct, 18:002,356 MW2,464 MW
31 Oct, 19:002,349 MW2,470 MW
31 Oct, 20:002,325 MW2,414 MW
31 Oct, 21:002,257 MW2,361 MW
31 Oct, 22:002,180 MW2,242 MW
31 Oct, 23:002,094 MW2,105 MW
1 Nov, 00:001,908 MW2,037 MW
1 Nov, 01:001,865 MW1,969 MW
1 Nov, 01:001,858 MW1,907 MW
1 Nov, 02:001,840 MW1,876 MW
1 Nov, 03:001,855 MW1,865 MW
1 Nov, 04:001,884 MW1,879 MW
1 Nov, 05:001,925 MW1,913 MW
1 Nov, 06:001,959 MW1,991 MW
1 Nov, 07:002,060 MW2,082 MW
1 Nov, 08:002,120 MW2,146 MW
1 Nov, 09:002,157 MW2,173 MW
1 Nov, 10:002,202 MW2,186 MW
1 Nov, 11:002,242 MW2,197 MW
1 Nov, 12:002,301 MW2,243 MW
1 Nov, 13:002,346 MW2,259 MW
1 Nov, 14:002,369 MW2,287 MW
1 Nov, 15:002,393 MW2,319 MW
1 Nov, 16:002,414 MW2,368 MW
1 Nov, 17:002,421 MW2,421 MW
1 Nov, 18:002,408 MW2,408 MW
1 Nov, 19:002,363 MW2,363 MW
1 Nov, 20:002,295 MW2,295 MW
1 Nov, 21:002,183 MW2,183 MW
1 Nov, 22:002,075 MW2,075 MW
1 Nov, 23:001,908 MWn/a
2 Nov, 00:001,959 MWn/a
2 Nov, 01:001,906 MWn/a
2 Nov, 02:001,891 MWn/a
2 Nov, 03:001,890 MWn/a
2 Nov, 04:001,923 MWn/a
2 Nov, 05:002,029 MWn/a
2 Nov, 06:002,233 MWn/a
2 Nov, 07:002,321 MWn/a
2 Nov, 08:002,445 MWn/a
2 Nov, 09:002,585 MWn/a
2 Nov, 10:002,693 MWn/a
2 Nov, 11:002,807 MWn/a
2 Nov, 12:002,786 MWn/a
2 Nov, 13:002,755 MWn/a
2 Nov, 14:002,747 MWn/a
2 Nov, 15:002,667 MWn/a
2 Nov, 16:002,674 MWn/a
2 Nov, 17:002,723 MWn/a
2 Nov, 18:002,763 MWn/a
2 Nov, 19:002,660 MWn/a
2 Nov, 20:002,553 MWn/a
2 Nov, 21:002,439 MWn/a
2 Nov, 22:002,284 MWn/a
2 Nov, 23:002,140 MWn/a
3 Nov, 00:002,070 MW2,080 MW
3 Nov, 01:002,072 MW2,016 MW
3 Nov, 02:002,031 MW1,974 MW
3 Nov, 03:002,025 MW1,971 MW
3 Nov, 04:002,032 MW2,006 MW
3 Nov, 05:002,054 MW2,118 MW
3 Nov, 06:002,213 MW2,284 MW
3 Nov, 07:002,281 MW2,350 MW
3 Nov, 08:002,487 MW2,404 MW
3 Nov, 09:002,661 MW2,442 MW
3 Nov, 10:002,779 MW2,462 MW
3 Nov, 11:002,882 MW2,526 MW
3 Nov, 12:002,805 MW2,618 MW
3 Nov, 13:002,719 MW2,701 MW
3 Nov, 14:002,921 MW2,749 MW
3 Nov, 15:002,935 MW2,781 MW
3 Nov, 16:002,868 MW2,764 MW
3 Nov, 17:002,842 MW2,816 MW
3 Nov, 18:002,878 MW2,739 MW
3 Nov, 19:002,758 MW2,648 MW
3 Nov, 20:002,658 MW2,568 MW
3 Nov, 21:002,524 MW2,424 MW
3 Nov, 22:002,382 MW2,309 MW
3 Nov, 23:002,257 MW2,187 MW
4 Nov, 00:002,227 MW2,054 MW
4 Nov, 01:002,231 MW1,989 MW
4 Nov, 02:002,188 MW1,947 MW
4 Nov, 03:002,177 MW1,945 MW
4 Nov, 04:002,189 MW1,974 MW
4 Nov, 05:002,314 MW2,084 MW
4 Nov, 06:002,381 MW2,268 MW
4 Nov, 07:002,440 MW2,352 MW
4 Nov, 08:002,496 MW2,410 MW
4 Nov, 09:002,626 MW2,488 MW
4 Nov, 10:002,708 MW2,564 MW
4 Nov, 11:002,866 MW2,690 MW
4 Nov, 12:002,799 MW2,814 MW
4 Nov, 13:002,859 MW2,929 MW
4 Nov, 14:002,972 MW2,974 MW
4 Nov, 15:002,943 MW3,010 MW
4 Nov, 16:002,909 MW2,999 MW
4 Nov, 17:002,973 MW3,049 MW
4 Nov, 18:002,988 MW2,900 MW
4 Nov, 19:002,896 MW2,791 MW
4 Nov, 20:002,785 MW2,682 MW
4 Nov, 21:002,618 MW2,512 MW
4 Nov, 22:002,473 MW2,379 MW
4 Nov, 23:002,289 MW2,244 MW
5 Nov, 00:002,130 MW2,135 MW
5 Nov, 01:002,076 MW2,062 MW
5 Nov, 02:002,022 MW2,017 MW
5 Nov, 03:001,960 MW2,003 MW
5 Nov, 04:002,024 MW2,029 MW
5 Nov, 05:002,110 MW2,141 MW
5 Nov, 06:002,366 MW2,324 MW
5 Nov, 07:002,437 MW2,416 MW
5 Nov, 08:002,493 MW2,478 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). SCEG Demand Forecast Accuracy: Error, Bias and Worst Miss. https://worldpowermonitor.com/forecast-accuracy/sceg/

Plain text

World Power Monitor. SCEG 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/sceg/

BibTeX 
@misc{wpm_forecast_accuracy_sceg_2026,
  title = {{SCEG 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/sceg/}
}

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