Reservoir · Pennsylvania · United States · USACE CWMS
Tionesta Lake, PA
26.7% full
Capacity
42.73 hm³
Volume stored
11 hm³
Coordinates
41.474°N, 79.439°W
Last updated
2026-06-12
Current fill
26.7%vs 7 days ago
0.0%stable
vs 1 year ago
-38.3%year-over-year
7-day trend
→stable
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: 2026-06-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.474, -79.439 · Open in Google Maps
About Tionesta Lake, PA
As of June 12, 2026, Tionesta Lake, PA is filled to 26.7% of its total capacity, holding roughly 11 hm³ of water out of a maximum 43 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 38.3 points below its level on the same date a year earlier.
Across the readings we hold for Tionesta Lake, PA — 325 data points between June 13, 2021 and June 12, 2026 — the level has ranged from a low of 21.7% (November 9, 2021) to a high of 100.0% (April 6, 2026). On average the reservoir is fullest around April and at its lowest around November.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 41.474°N, 79.439°W.
Key facts
- Current fill level
- 26.7%
- Water stored
- 11 hm³
- Total capacity
- 43 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 38.3 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 41.474°N, 79.439°W
- Last updated
- June 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Jun 2026 | 26.7% | 11 |
| 11 Jun 2026 | 26.7% | 11 |
| 10 Jun 2026 | 27.0% | 12 |
| 9 Jun 2026 | 27.4% | 12 |
| 8 Jun 2026 | 27.7% | 12 |
| 7 Jun 2026 | 27.3% | 12 |
| 6 Jun 2026 | 26.9% | 12 |
| 5 Jun 2026 | 27.1% | 12 |
| 4 Jun 2026 | 27.1% | 12 |
| 3 Jun 2026 | 27.1% | 12 |
| 2 Jun 2026 | 26.8% | 11 |
| 1 Jun 2026 | 27.4% | 12 |
Frequently asked questions
What is the current water level of Tionesta Lake, PA?
As of June 12, 2026, Tionesta Lake, PA is at 26.7% of its capacity, holding approximately 11 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Tionesta Lake, PA reservoir full?
No. As of June 12, 2026, Tionesta Lake, PA is low at 26.7% of its capacity, so it is not full.
Is the water level at Tionesta Lake, PA rising or falling?
The level at Tionesta Lake, PA has been broadly stable over the latest week on record (0.0 points).
How much water can Tionesta Lake, PA hold?
Tionesta Lake, PA has a total capacity of 43 hm³.
Where is Tionesta Lake, PA reservoir located?
Tionesta Lake, PA is located in Pennsylvania, United States, within the Pennsylvania basin (coordinates 41.474°N, 79.439°W).
What is Tionesta Lake, PA used for?
Tionesta Lake, PA is used primarily for multiple purposes, and is managed by USACE.