Reservoir · Pennsylvania · United States · USACE CWMS
Loyalhanna Lake
16.8% full
Capacity
26.51 hm³
Volume stored
4 hm³
Vs month average
83% of normal
Coordinates
40.457°N, 79.451°W
Last updated
2026-10-29
Current fill
16.8%vs 7 days ago
-0.8 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
83%of normal
16.8% full on 2026-10-29, against an average of 20.2% for October across 2 years of readings (-3.4 points).
Drought Monitor at this site · 27 October 2026
Nonenot in a drought category
Loyalhanna Lake's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Pennsylvania drought figures →
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-10-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.457°N, 79.451°W · Open in Google Maps
About Loyalhanna Lake
As of October 29, 2026, Loyalhanna Lake is filled to 16.8% of its total capacity, holding 4.44 hm³ of water out of a maximum 26.51 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.8 pp).
Across the readings we hold for Loyalhanna Lake — 326 data points between October 30, 2021 and October 29, 2026 — the level has ranged from a low of 7.5% (March 9, 2022) to a high of 100.0% (May 8, 2022). On average the reservoir is fullest around February and at its lowest around November.
It is operated by USACE primarily for multiple purposes. It is at 40.457°N, 79.451°W.
Key facts
- Current fill level
- 16.8% of total capacity
- Water stored
- 4.44 hm³
- Total capacity
- 26.51 hm³
- 7-day change
- ▼ 0.8 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 40.457°N, 79.451°W
- Last updated
- October 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Oct 2026 | 16.8% | 4.44 |
| 28 Oct 2026 | 17.0% | 4.52 |
| 27 Oct 2026 | 17.5% | 4.63 |
| 26 Oct 2026 | 17.8% | 4.71 |
| 25 Oct 2026 | 18.0% | 4.78 |
| 24 Oct 2026 | 18.1% | 4.8 |
| 23 Oct 2026 | 18.0% | 4.76 |
| 22 Oct 2026 | 17.6% | 4.65 |
| 21 Oct 2026 | 16.8% | 4.44 |
| 20 Oct 2026 | 16.8% | 4.44 |
| 19 Oct 2026 | 17.1% | 4.54 |
| 18 Oct 2026 | 19.4% | 5.15 |