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Built 2026-11-12 (12 November 2026)

SCEG Demand Forecast Accuracy: Error, Bias and Worst Miss, 13 October to 12 November 2026

The day-ahead demand forecast for SCEG was off by 5.1% on average (mean absolute percentage error) over 694 hours from 13 October to 12 November 2026, and 63% of hours landed within 5% of the reading. Its bias was -4.1%: it ran low on average, an under forecast. The largest miss was 654 MW (22.4%) too low at 7 Nov 2026, 12:00 EST (UTC-05:00). Dates and times are local (America/New_York).

Key Facts

  • The day-ahead demand forecast for SCEG was off by 5.1% on average (mean absolute percentage error) over 694 hours from 13 October to 12 November 2026, and 63% of hours landed within 5% of the reading. Its bias was -4.1%: it ran low on average, an under forecast. The largest miss was 654 MW (22.4%) too low at 7 Nov 2026, 12:00 EST (UTC-05:00).
  • Across 53 US grids ranked by average error over their own latest 30 day windows, SCEG came 32 (1 is the smallest error).
  • On average the forecast differed from reported demand by 133 MW, against average demand of 2,491 MW.
  • The forecast was above reported demand in 21% of compared hours.

Forecast Error at a Glance

694 hours from 13 October to 12 November 2026
Average error5.1%
Bias-4.1%
Hours within 5%63%
Worst miss654 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (-111 MW per hour on average): the forecast ran low on average, an under forecast. The worst miss was 654 MW (22.4%) too low at 7 Nov 2026, 12:00 EST (UTC-05:00): forecast 2,266 MW, reported 2,920 MW.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-11-12. 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 12 Nov 2026, 07:00 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 12 Nov 2026, 07:00 EST (UTC-05:00). Gaps are hours with a missing, zero or implausible report. 0 1,000 2,000 3,000 4,000 5 Nov, 08:006 Nov, 08:007 Nov, 08:008 Nov, 08:009 Nov, 08:0010 Nov, 08:0011 Nov, 08:00
Hourly reported demand and the day-ahead forecast for SCEG over the last 7 days of the window, to 12 Nov 2026, 07:00 EST (UTC-05:00). Gaps are hours with a missing, zero or implausible report.
Data to 2026-11-12
Show the data table (168 rows)
Local hourReported demandDay-ahead forecast
5 Nov, 08:002,589 MW2,478 MW
5 Nov, 09:002,871 MW2,559 MW
5 Nov, 10:002,943 MW2,646 MW
5 Nov, 11:003,066 MW2,772 MW
5 Nov, 12:003,126 MW2,888 MW
5 Nov, 13:003,099 MW2,995 MW
5 Nov, 14:003,110 MW3,052 MW
5 Nov, 15:003,154 MW3,091 MW
5 Nov, 16:003,125 MW3,089 MW
5 Nov, 17:003,092 MW3,126 MW
5 Nov, 18:003,089 MW2,943 MW
5 Nov, 19:003,015 MW2,828 MW
5 Nov, 20:002,912 MW2,722 MW
5 Nov, 21:002,767 MW2,556 MW
5 Nov, 22:002,597 MW2,428 MW
5 Nov, 23:002,428 MW2,286 MW
6 Nov, 00:002,378 MW2,190 MW
6 Nov, 01:002,373 MW2,110 MW
6 Nov, 02:002,333 MW2,062 MW
6 Nov, 03:002,376 MW2,048 MW
6 Nov, 04:002,395 MW2,063 MW
6 Nov, 05:002,418 MW2,179 MW
6 Nov, 06:002,462 MW2,361 MW
6 Nov, 07:002,519 MW2,438 MW
6 Nov, 08:002,608 MW2,496 MW
6 Nov, 09:002,756 MW2,569 MW
6 Nov, 10:002,992 MW2,631 MW
6 Nov, 11:003,148 MW2,739 MW
6 Nov, 12:003,063 MW2,790 MW
6 Nov, 13:003,055 MW2,869 MW
6 Nov, 14:003,062 MW2,904 MW
6 Nov, 15:003,076 MW2,928 MW
6 Nov, 16:003,005 MW2,940 MW
6 Nov, 17:002,972 MW2,891 MW
6 Nov, 18:002,885 MW2,793 MW
6 Nov, 19:002,786 MW2,654 MW
6 Nov, 20:002,673 MW2,510 MW
6 Nov, 21:002,555 MW2,347 MW
6 Nov, 22:002,424 MW2,258 MW
6 Nov, 23:002,272 MW2,141 MW
7 Nov, 00:002,148 MW2,102 MW
7 Nov, 01:002,046 MW2,017 MW
7 Nov, 02:001,987 MW1,961 MW
7 Nov, 03:001,951 MW1,942 MW
7 Nov, 04:001,949 MW1,944 MW
7 Nov, 05:001,968 MW1,959 MW
7 Nov, 06:002,033 MW1,990 MW
7 Nov, 07:002,142 MW2,039 MW
7 Nov, 08:002,385 MW2,098 MW
7 Nov, 09:002,494 MW2,182 MW
7 Nov, 10:002,697 MW2,220 MW
7 Nov, 11:002,838 MW2,251 MW
7 Nov, 12:002,920 MW2,266 MW
7 Nov, 13:002,831 MW2,305 MW
7 Nov, 14:002,846 MW2,322 MW
7 Nov, 15:002,863 MW2,326 MW
7 Nov, 16:002,537 MW2,348 MW
7 Nov, 17:002,468 MW2,393 MW
7 Nov, 18:002,534 MW2,420 MW
7 Nov, 19:002,495 MW2,359 MW
7 Nov, 20:002,428 MW2,312 MW
7 Nov, 21:002,339 MW2,266 MW
7 Nov, 22:002,325 MW2,174 MW
7 Nov, 23:002,162 MW2,084 MW
8 Nov, 00:002,060 MW2,069 MW
8 Nov, 01:002,014 MW2,026 MW
8 Nov, 02:001,971 MW1,998 MW
8 Nov, 03:001,955 MW2,000 MW
8 Nov, 04:001,959 MW2,016 MW
8 Nov, 05:001,989 MW2,051 MW
8 Nov, 06:002,058 MW2,080 MW
8 Nov, 07:002,126 MW2,115 MW
8 Nov, 08:002,252 MW2,181 MW
8 Nov, 09:002,365 MW2,245 MW
8 Nov, 10:002,435 MW2,246 MW
8 Nov, 11:002,526 MW2,226 MW
8 Nov, 12:002,546 MW2,216 MW
8 Nov, 13:002,567 MW2,211 MW
8 Nov, 14:002,552 MW2,218 MW
8 Nov, 15:002,591 MW2,246 MW
8 Nov, 16:002,493 MW2,267 MW
8 Nov, 17:002,509 MW2,356 MW
8 Nov, 18:002,568 MW2,446 MW
8 Nov, 19:002,504 MW2,425 MW
8 Nov, 20:002,474 MW2,362 MW
8 Nov, 21:002,391 MW2,317 MW
8 Nov, 22:002,262 MW2,217 MW
8 Nov, 23:002,159 MW2,112 MW
9 Nov, 00:002,077 MW2,025 MW
9 Nov, 01:002,046 MW1,995 MW
9 Nov, 02:002,009 MW1,974 MW
9 Nov, 03:002,036 MW1,993 MW
9 Nov, 04:002,078 MW2,046 MW
9 Nov, 05:002,220 MW2,176 MW
9 Nov, 06:002,445 MW2,359 MW
9 Nov, 07:002,517 MW2,428 MW
9 Nov, 08:002,522 MW2,443 MW
9 Nov, 09:002,559 MW2,426 MW
9 Nov, 10:002,535 MW2,397 MW
9 Nov, 11:002,554 MW2,381 MW
9 Nov, 12:002,565 MW2,393 MW
9 Nov, 13:002,603 MW2,432 MW
9 Nov, 14:002,629 MW2,453 MW
9 Nov, 15:002,615 MW2,483 MW
9 Nov, 16:002,625 MW2,496 MW
9 Nov, 17:002,668 MW2,558 MW
9 Nov, 18:002,694 MW2,606 MW
9 Nov, 19:002,653 MW2,564 MW
9 Nov, 20:002,576 MW2,478 MW
9 Nov, 21:002,455 MW2,383 MW
9 Nov, 22:002,312 MW2,253 MW
9 Nov, 23:002,205 MW2,143 MW
10 Nov, 00:002,108 MW2,049 MW
10 Nov, 01:002,083 MW2,018 MW
10 Nov, 02:002,072 MW2,003 MW
10 Nov, 03:002,068 MW2,028 MW
10 Nov, 04:002,136 MW2,089 MW
10 Nov, 05:002,298 MW2,238 MW
10 Nov, 06:002,496 MW2,470 MW
10 Nov, 07:002,619 MW2,566 MW
10 Nov, 08:002,510 MW2,561 MW
10 Nov, 09:002,582 MW2,509 MW
10 Nov, 10:002,452 MW2,433 MW
10 Nov, 11:002,422 MW2,430 MW
10 Nov, 12:002,449 MW2,441 MW
10 Nov, 13:002,450 MW2,483 MW
10 Nov, 14:002,500 MW2,494 MW
10 Nov, 15:002,562 MW2,519 MW
10 Nov, 16:002,570 MW2,520 MW
10 Nov, 17:002,617 MW2,588 MW
10 Nov, 18:002,671 MW2,650 MW
10 Nov, 19:002,597 MW2,583 MW
10 Nov, 20:002,564 MW2,497 MW
10 Nov, 21:002,437 MW2,371 MW
10 Nov, 22:002,334 MW2,230 MW
10 Nov, 23:002,202 MW2,100 MW
11 Nov, 00:002,179 MW1,969 MW
11 Nov, 01:002,229 MW1,922 MW
11 Nov, 02:002,237 MW1,905 MW
11 Nov, 03:002,223 MW1,909 MW
11 Nov, 04:002,265 MW1,957 MW
11 Nov, 05:002,312 MW2,073 MW
11 Nov, 06:002,436 MW2,288 MW
11 Nov, 07:002,491 MW2,357 MW
11 Nov, 08:002,626 MW2,365 MW
11 Nov, 09:002,864 MW2,354 MW
11 Nov, 10:002,858 MW2,326 MW
11 Nov, 11:002,794 MW2,320 MW
11 Nov, 12:002,801 MW2,341 MW
11 Nov, 13:002,771 MW2,390 MW
11 Nov, 14:002,621 MW2,400 MW
11 Nov, 15:002,514 MW2,431 MW
11 Nov, 16:002,544 MW2,449 MW
11 Nov, 17:002,651 MW2,548 MW
11 Nov, 18:002,695 MW2,606 MW
11 Nov, 19:002,647 MW2,530 MW
11 Nov, 20:002,556 MW2,405 MW
11 Nov, 21:002,452 MW2,328 MW
11 Nov, 22:002,322 MW2,166 MW
11 Nov, 23:002,192 MW2,023 MW
12 Nov, 00:002,075 MW2,018 MW
12 Nov, 01:002,036 MW1,956 MW
12 Nov, 02:002,017 MW1,912 MW
12 Nov, 03:001,977 MW1,902 MW
12 Nov, 04:002,023 MW1,930 MW
12 Nov, 05:002,169 MW2,022 MW
12 Nov, 06:002,401 MW2,192 MW
12 Nov, 07:002,504 MW2,247 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 2026-11-12. 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 2026-11-12. Data from U.S. Energy Information Administration.},
  url = {https://worldpowermonitor.com/forecast-accuracy/sceg/}
}

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