Frankstown Branch Juniata River at Williamsburg, PA
USGS Site No: 01556000 • Frankstown Branch Juniata River • Blair County, PA
Frankstown Branch Juniata River at Williamsburg, PA on the Frankstown Branch Juniata River is currently at 535 cfs (High — 83th percentile for this date) . Gage height: 4.17 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 112 | |
| 25th | Low threshold | 141 | |
| 50th (Median) | Normal (median) | 205 | |
| 75th | High threshold | 295 | |
| 95th | Very High threshold | 882 | Today: 535 cfs |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 734 | — |
| May 27, 2026 | 986 | — |
| May 26, 2026 | 1,430 | — |
| May 25, 2026 | 2,270 | — |
| May 24, 2026 | 1,410 | — |
| May 23, 2026 | 1,970 | — |
| May 22, 2026 | 247 | — |
| May 21, 2026 | 258 | — |
| May 20, 2026 | 186 | — |
| May 19, 2026 | 185 | — |
| May 18, 2026 | 196 | — |
| May 17, 2026 | 200 | — |
| May 16, 2026 | 207 | — |
| May 15, 2026 | 228 | — |
| Apr 21, 2026 | 306 | — |
| Apr 20, 2026 | 328 | — |
| Apr 19, 2026 | 376 | — |
| Apr 18, 2026 | 310 | — |
| Apr 17, 2026 | 387 | — |
| Apr 16, 2026 | 250 | — |
| Apr 15, 2026 | 269 | — |
| Apr 14, 2026 | 270 | — |
| Apr 13, 2026 | 285 | — |
| Apr 12, 2026 | 299 | — |
| Apr 11, 2026 | 328 | — |
| Apr 10, 2026 | 335 | — |
| Apr 9, 2026 | 363 | — |
| Apr 8, 2026 | 391 | — |
| Apr 7, 2026 | 434 | — |
| Apr 6, 2026 | 488 | — |
Station Information
- USGS Site No
- 01556000
- State
- PA
- County
- Blair County
- Coordinates
- 40.4631, -78.1997
- Drainage Area
- 291 mi²
- Datum (ft)
- 831.8
- HUC Code
- 02050302
Flood Stage Thresholds
- Action Stage
- 9.0 ft
- Flood Stage
- 12.0 ft
- Moderate Flood
- 13.0 ft
- Major Flood
- 15.0 ft
Currently 7.83 ft below flood stage.
Recent Extremes
- Max discharge
-
5,120 cfsJun 18, 2025
- Min discharge
-
70 cfsSep 21, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Juniata River at Huntingdon, PAHigh9.6 mi · 1,450 cfs
-
Little Juniata River at Spruce Creek, PAHigh10.8 mi · 482 cfs
-
Rays Branch Juniata River below Rays Dam near Huntingdon, PAHigh11.2 mi · 1,710 cfs
-
Juniata River at Mapleton Depot, PAHigh14.8 mi · 3,340 cfs
-
Bald Eagle Creek at Tyrone, PAHigh15.3 mi · 80 cfs