Reservoir · Pennsylvania · United States · USACE CWMS
East Branch Clarion Lake
65.8% full
Capacity
80.55 hm³
Volume stored
53 hm³
Vs month average
95% of normal
Coordinates
41.561°N, 78.595°W
Last updated
2026-10-28
Current fill
65.8%vs 7 days ago
-1.3 pplosing
vs 1 year ago
N/A7-day trend
↓falling
Drought context
Storage vs October average
95%of normal
65.8% full on 2026-10-28, against an average of 69.2% for October across 2 years of readings (-3.4 points).
Drought Monitor at this site · 20 October 2026
Nonenot in a drought category
East Branch Clarion 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. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.561°N, 78.595°W · Open in Google Maps
About East Branch Clarion Lake
As of October 28, 2026, East Branch Clarion Lake is filled to 65.8% of its total capacity, holding 52.97 hm³ of water out of a maximum 80.55 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 1.3 percentage points.
Across the readings we hold for East Branch Clarion Lake — 329 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 65.8% (October 28, 2026) to a high of 104.2% (March 20, 2022). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It is at 41.561°N, 78.595°W.
Key facts
- Current fill level
- 65.8% of total capacity
- Water stored
- 52.97 hm³
- Total capacity
- 80.55 hm³
- 7-day change
- ▼ 1.3 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 41.561°N, 78.595°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 65.8% | 52.97 |
| 27 Oct 2026 | 65.9% | 53.06 |
| 26 Oct 2026 | 66.1% | 53.24 |
| 25 Oct 2026 | 66.3% | 53.42 |
| 24 Oct 2026 | 66.5% | 53.57 |
| 23 Oct 2026 | 66.7% | 53.73 |
| 22 Oct 2026 | 66.9% | 53.88 |
| 21 Oct 2026 | 67.1% | 54.02 |
| 20 Oct 2026 | 67.3% | 54.17 |
| 19 Oct 2026 | 67.4% | 54.31 |
| 18 Oct 2026 | 67.7% | 54.53 |
| 17 Oct 2026 | 68.0% | 54.75 |