Reservoir · Antioquia · Colombia · XM
San Lorenzo
79.3% full
Capacity
425.74 GWh
Energy stored
338 GWh
River
Nare
Coordinates
6.191°N, 74.944°W
Last updated
2026-10-26
Current fill
79.3%vs 7 days ago
-2.0 pplosing
vs 1 year ago
-3.3 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
91%of normal
79.3% full on 2026-10-26, against an average of 86.8% for October across 6 years of readings (-7.5 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around San Lorenzo had extremely little rain for the season, a shortfall seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −2.35). Rain, not storage. Colombia drought figures →
Data source: XM — Operador del Mercado de Energía — daily useful-energy storage (VoluUtilDiarEner) and useful capacity (CapaUtilDiarEner). Colombia is a hydropower system, so storage is reported as energy (GWh), not water volume; fill % is useful energy ÷ useful capacity. Last reading: 2026-10-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 6.191°N, 74.944°W · Open in Google Maps
About San Lorenzo
As of October 26, 2026, San Lorenzo is filled to 79.3% of its total capacity, holding 337.7 GWh of water out of a maximum 425.74 GWh. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 2.0 percentage points, and it is 3.3 points below its level on the same date a year earlier.
Across the readings we hold for San Lorenzo — 2065 data points between January 1, 2021 and October 26, 2026 — the level has ranged from a low of 6.3% (April 9, 2024) to a high of 105.0% (November 24, 2022). On average the reservoir is fullest around August and at its lowest around April.
It is operated by XM primarily for hydroelectric power. It lies within the Nare basin at 6.191°N, 74.944°W.
Key facts
- Current fill level
- 79.3% of total capacity
- Water stored
- 337.7 GWh
- Total capacity
- 425.74 GWh
- 7-day change
- ▼ 2.0 pp
- Year-on-year
- ▼ 3.3 pp
- Primary use
- Hydroelectric power
- River basin
- Nare
- Operator
- XM
- Coordinates
- 6.191°N, 74.944°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (GWh) |
|---|---|---|
| 26 Oct 2026 | 79.3% | 337.7 |
| 25 Oct 2026 | 78.1% | 332.35 |
| 24 Oct 2026 | 77.2% | 328.63 |
| 23 Oct 2026 | 79.0% | 336.22 |
| 22 Oct 2026 | 81.2% | 345.79 |
| 21 Oct 2026 | 83.7% | 356.52 |
| 20 Oct 2026 | 82.3% | 350.4 |
| 19 Oct 2026 | 81.3% | 346.26 |
| 18 Oct 2026 | 80.4% | 342.31 |
| 17 Oct 2026 | 78.2% | 332.93 |
| 16 Oct 2026 | 77.2% | 328.47 |
| 15 Oct 2026 | 78.1% | 332.72 |