Unusual days
Days where demand or price departed from what the usual weekly and seasonal pattern predicts. Severity is how far, in robust standard deviations.
Where they fall in time
GWh/day
- Unusually high
- Unusually low
Unusual days by severity
| Date | Direction | Severity | Observed (GWh/day) | Expected (GWh/day) | Method |
|---|---|---|---|---|---|
| Apr 1, 2020 | Lower than expected | 10.3 | 171.2 | 198.4 | Seasonal decomposition + Isolation Forest |
| Mar 31, 2020 | Lower than expected | 10.2 | 173.3 | 198.1 | Seasonal decomposition + Isolation Forest |
| Mar 25, 2020 | Lower than expected | 9.9 | 175.2 | 201.8 | Seasonal decomposition + Isolation Forest |
| Mar 24, 2020 | Lower than expected | 9.9 | 179.1 | 202.2 | Seasonal decomposition + Isolation Forest |
| Apr 2, 2020 | Lower than expected | 9.8 | 173.2 | 199.2 | Seasonal decomposition + Isolation Forest |
| Mar 26, 2020 | Lower than expected | 9.8 | 176.3 | 202.9 | Seasonal decomposition + Isolation Forest |
| May 1, 2021 | Lower than expected | 9.3 | 177.5 | 199.9 | Seasonal decomposition + Isolation Forest |
| Mar 30, 2018 | Lower than expected | 9.0 | 151.6 | 169.9 | Seasonal decomposition + Isolation Forest |
| Mar 31, 2018 | Lower than expected | 8.9 | 162.8 | 184.1 | Seasonal decomposition + Isolation Forest |
| Dec 24, 2023 | Higher than expected | 8.8 | 198.8 | 177.5 | Seasonal decomposition + Isolation Forest |
| Jan 22, 2018 | Higher than expected | 8.7 | 191.5 | 172.5 | Seasonal decomposition + Isolation Forest |
| Jan 15, 2018 | Higher than expected | 8.6 | 187.4 | 168.5 | Seasonal decomposition + Isolation Forest |
| Jan 29, 2018 | Higher than expected | 8.4 | 194.2 | 176.5 | Seasonal decomposition + Isolation Forest |
| Apr 20, 2019 | Lower than expected | 8.4 | 172.2 | 192.9 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2018 | Lower than expected | 8.3 | 163.2 | 181.0 | Seasonal decomposition + Isolation Forest |
| Apr 14, 2020 | Lower than expected | 8.3 | 175.3 | 192.6 | Seasonal decomposition + Isolation Forest |
| Jan 8, 2018 | Higher than expected | 8.2 | 161.6 | 146.5 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2025 | Lower than expected | 8.2 | 202.4 | 224.0 | Seasonal decomposition + Isolation Forest |
| Apr 15, 2020 | Lower than expected | 8.2 | 173.6 | 192.7 | Seasonal decomposition + Isolation Forest |
| Apr 7, 2023 | Lower than expected | 8.1 | 176.0 | 195.1 | Seasonal decomposition + Isolation Forest |
| Apr 8, 2023 | Lower than expected | 8.0 | 190.2 | 212.6 | Seasonal decomposition + Isolation Forest |
| Mar 30, 2024 | Lower than expected | 7.9 | 203.4 | 225.0 | Seasonal decomposition + Isolation Forest |
| Apr 16, 2020 | Lower than expected | 7.8 | 175.4 | 193.2 | Seasonal decomposition + Isolation Forest |
| Mar 27, 2020 | Lower than expected | 7.7 | 176.2 | 189.8 | Seasonal decomposition + Isolation Forest |
| Jan 1, 2022 | Lower than expected | 7.7 | 165.3 | 182.4 | Seasonal decomposition + Isolation Forest |
| May 3, 2021 | Lower than expected | 7.7 | 189.4 | 206.4 | Seasonal decomposition + Isolation Forest |
| Apr 7, 2020 | Lower than expected | 7.6 | 175.2 | 191.4 | Seasonal decomposition + Isolation Forest |
| May 6, 2021 | Lower than expected | 7.6 | 190.6 | 207.2 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2021 | Lower than expected | 7.4 | 168.4 | 185.7 | Seasonal decomposition + Isolation Forest |
| May 7, 2021 | Lower than expected | 7.4 | 191.6 | 207.7 | Seasonal decomposition + Isolation Forest |
| May 5, 2021 | Lower than expected | 7.3 | 188.9 | 204.0 | Seasonal decomposition + Isolation Forest |
| Apr 3, 2020 | Lower than expected | 7.1 | 176.3 | 187.6 | Seasonal decomposition + Isolation Forest |
| May 4, 2021 | Lower than expected | 7.1 | 191.3 | 205.9 | Seasonal decomposition + Isolation Forest |
| Mar 6, 2020 | Higher than expected | 7.1 | 216.9 | 202.0 | Seasonal decomposition + Isolation Forest |
| Jul 20, 2021 | Higher than expected | 7.1 | 199.6 | 186.0 | Seasonal decomposition + Isolation Forest |
| Dec 31, 2023 | Higher than expected | 7.1 | 191.3 | 177.6 | Seasonal decomposition + Isolation Forest |
| Apr 19, 2019 | Lower than expected | 7.0 | 163.1 | 177.6 | Seasonal decomposition + Isolation Forest |
| Apr 3, 2021 | Lower than expected | 7.0 | 179.4 | 197.8 | Seasonal decomposition + Isolation Forest |
| Mar 14, 2020 | Higher than expected | 7.0 | 199.2 | 183.4 | Seasonal decomposition + Isolation Forest |
| Mar 16, 2020 | Higher than expected | 6.9 | 206.7 | 190.7 | Seasonal decomposition + Isolation Forest |
| Jan 7, 2025 | Lower than expected | 6.9 | 217.9 | 235.1 | Seasonal decomposition + Isolation Forest |
| May 2, 2021 | Lower than expected | 6.8 | 171.4 | 181.7 | Seasonal decomposition + Isolation Forest |
| Mar 13, 2020 | Higher than expected | 6.8 | 209.9 | 196.9 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2020 | Lower than expected | 6.8 | 181.8 | 198.6 | Seasonal decomposition + Isolation Forest |
| Mar 7, 2020 | Higher than expected | 6.7 | 204.2 | 188.2 | Seasonal decomposition + Isolation Forest |
| May 8, 2021 | Lower than expected | 6.7 | 185.9 | 199.8 | Seasonal decomposition + Isolation Forest |
| Apr 1, 2018 | Lower than expected | 6.7 | 157.1 | 167.0 | Seasonal decomposition + Isolation Forest |
| Feb 2, 2026 | Lower than expected | 6.7 | 220.6 | 240.2 | Seasonal decomposition + Isolation Forest |
| Mar 30, 2020 | Lower than expected | 6.7 | 173.9 | 185.0 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2024 | Lower than expected | 6.6 | 203.9 | 222.3 | Seasonal decomposition + Isolation Forest |
| Mar 29, 2024 | Lower than expected | 6.6 | 191.5 | 206.4 | Seasonal decomposition + Isolation Forest |
| Apr 8, 2020 | Lower than expected | 6.5 | 176.6 | 191.5 | Seasonal decomposition + Isolation Forest |
| Apr 11, 2020 | Lower than expected | 6.3 | 163.2 | 173.7 | Seasonal decomposition + Isolation Forest |
| Apr 21, 2020 | Lower than expected | 6.3 | 176.4 | 188.6 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2026 | Lower than expected | 6.3 | 215.1 | 231.5 | Seasonal decomposition + Isolation Forest |
| Sep 15, 2024 | Higher than expected | 6.3 | 216.3 | 201.7 | Seasonal decomposition + Isolation Forest |
| Jul 20, 2022 | Higher than expected | 6.1 | 206.9 | 193.7 | Seasonal decomposition + Isolation Forest |
| Jan 7, 2020 | Lower than expected | 6.1 | 195.8 | 209.6 | Seasonal decomposition + Isolation Forest |
| Apr 2, 2021 | Lower than expected | 6.1 | 169.1 | 181.0 | Seasonal decomposition + Isolation Forest |
| Jan 1, 2018 | Higher than expected | 6.1 | 139.8 | 126.8 | Seasonal decomposition + Isolation Forest |
| Mar 9, 2020 | Higher than expected | 6.0 | 208.3 | 195.6 | Seasonal decomposition + Isolation Forest |
| Jan 3, 2025 | Lower than expected | 6.0 | 209.9 | 222.7 | Seasonal decomposition + Isolation Forest |
| Jan 2, 2019 | Lower than expected | 6.0 | 175.0 | 190.6 | Seasonal decomposition + Isolation Forest |
| Apr 30, 2021 | Lower than expected | 6.0 | 194.7 | 207.6 | Seasonal decomposition + Isolation Forest |
Methods: a seasonal decomposition measures how far a day is from its weekly and yearly pattern, and Isolation Forest flags days that are unusual in the combination of the other signals.