Juniata River at Lewistown
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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Observed (OBS) 07/02/2025 11:30 PM EDTOfficial Forecast (FCST) 07/02/2025 10:18 PM EDTRecord: 43.3 ftLow Threshold: 0 ftCATEGORY STAGE 
Major Flooding 28 ft Moderate Flooding 27 ft Minor Flooding 23 ft Action 18 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 43.3 - Flood of record from June 1889. FEMA 0.2 0X0P+0nnual Chance Flood Level (500-year flood).
- 34.5 - FEMA 1 0X0P+0nnual Chance Flood Level (100-year flood). Widespread inundation occurs on both banks of the river. A large portion of Lewistown is affected by flood waters.
- 32 - The right, or south bank begins to overflow. Expect water up to 6 feet deep in houses on West Elizabeth Street. Expect water up to 2 feet deep in houses on South Main Street.
Gauge Info
| Coordinates | 40.5944, -77.5828 |
| RFC | MARFC |
| State | PA |
| WFO | CTP |
| County | Mifflin |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 01564895 |
Gauge Location
Recent Crests
| 1. | 23.00 ft | on 09-11-2018 |
| 2. | 31.68 ft | on 09-19-2004 |
| 3. | 23.60 ft | on 11-08-1997 |
| 4. | 31.63 ft | on 01-20-1996 |
| 5. | 21.34 ft | on 03-26-1994 |
Recent Crests
| 1. | 23.00 ft | on 09-11-2018 | |
| 2. | 31.68 ft | on 09-19-2004 | |
| 3. | 23.60 ft | on 11-08-1997 | |
| 4. | 31.63 ft | on 01-20-1996 | |
| 5. | 21.34 ft | on 03-26-1994 | |
| 6. | 22.40 ft | on 11-29-1993 | |
| 7. | 27.40 ft | on 02-15-1984 | |
| 8. | 42.10 ft | on 06-23-1972 | |
| 9. | 19.80 ft | on 02-23-1971 | |
| 10. | 23.30 ft | on 04-03-1970 | |
| 11. | 32.00 ft | on 11-26-1950 | |
| 12. | 43.00 ft | on 03-18-1936 | 1 |
| 13. | 43.30 ft | on 06-01-1889 | 1 |
Historic Crests
| 1. | 43.30 ft | on 06-01-1889 | 1 |
| 2. | 43.00 ft | on 03-18-1936 | 1 |
| 3. | 42.10 ft | on 06-23-1972 | |
| 4. | 32.00 ft | on 11-26-1950 | |
| 5. | 31.68 ft | on 09-19-2004 |
Historic Crests
| 1. | 43.30 ft | on 06-01-1889 | 1 |
| 2. | 43.00 ft | on 03-18-1936 | 1 |
| 3. | 42.10 ft | on 06-23-1972 | |
| 4. | 32.00 ft | on 11-26-1950 | |
| 5. | 31.68 ft | on 09-19-2004 | |
| 6. | 31.63 ft | on 01-20-1996 | |
| 7. | 27.40 ft | on 02-15-1984 | |
| 8. | 23.60 ft | on 11-08-1997 | |
| 9. | 23.30 ft | on 04-03-1970 | |
| 10. | 23.00 ft | on 09-11-2018 | |
| 11. | 22.40 ft | on 11-29-1993 | |
| 12. | 21.34 ft | on 03-26-1994 | |
| 13. | 19.80 ft | on 02-23-1971 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 471.83 ft |
| moderate Flooding | 470.83 ft |
| minor Flooding | 466.83 ft |
| action | 461.83 ft |
| Latest Value | 449.59 ft |
| Gauge Zero | 443.83 ft |
Unique Local Info
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Potential River Levels Used to Estimate the Chance of Flooding and the Range of Possible River Levels |
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| 10 Day (HEFS) | 10 Day (NAEFS) | 10 Day (GEFS) |
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Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.
Click individual graphics to enlarge.
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.