Rivers in Pennsylvania
West Branch Susquehanna River at Lewisburg
Below flood stage
3.64ftStage
Observed Sun, Sep 27, 11:45 AM EDT
- Flood stage
- 18.00 ft
- Forecast crest
- 3.60 ftSun, Sep 27, 2:00 PM EDT
- Record crest
- 34.23 ft1972
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 28.00 ft |
| Moderate flood | 23.00 ft |
| Minor flood | 18.00 ft |
| Action | 14.00 ft |
- 40.00 ftApproximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
- 34.20 ftFlood of record from Hurricane Agnes in 1972.
- 32.50 ftApproximate level of the FEMA 1% Annual Chance Flood level (100-year flood).
- 32.00 ftFlood waters begin to reach the Market Street Bridge. The intersection of 4th and Catherine Streets is inundated. A significant portion of Lewisburg is inundated.
- 30.00 ftApproximate level of the FEMA 2% Annual Chance Flood level (50-year flood).
- 28.00 ftThe right, or west bank overflows and affects Lewisburg. Widespread inundation on the left bank affects several mobile home parks. Many residences and businesses on both banks are affected by flood waters.
- 25.50 ftApproximate level of the FEMA 10% Annual Chance Flood level (10-year flood).
- 25.00 ftLow lying areas on the right, or west bank are affected. The left bank continues to experience inundation.
- 23.00 ftThe mobile home park along Route 405 downstream of the bridge will flood.
- 21.00 ftThe left, or east bank experiences substantial overflow.
- 19.00 ftRoute 405 is affected downstream of the Lewisburg Bridge.
- 18.00 ftThe left, or east bank overflows. Low lying areas will flood.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 13% |
| Moderate flooding | 6% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.
Crest history
34 crests on NOAA’s list since 1889.
| # | Date | Stage |
|---|---|---|
| 1 | June 24, 1972 | 34.23 ft |
| 2 | March 19, 1936 | 32.10 ft |
| 3 | June 1, 1889 | 29.80 ft |
| 4 | May 21, 1894 | 28.50 ft |
| 5 | May 29, 1946 | 28.43 ft |
| 6 | September 27, 1975 | 27.62 ft |
| 7 | March 11, 1964 | 26.16 ft |
| 8 | November 26, 1950 | 26.05 ft |
| 9 | September 19, 2004 | 26.01 ft |
| 10 | January 20, 1996 | 25.94 ft |
| 11 | September 8, 2011 | 25.91 ft |
| 12 | February 15, 1984 | 24.26 ft |
| 13 | March 6, 1979 | 23.44 ft |
| 14 | April 2, 1993 | 21.30 ft |
| 15 | February 27, 1961 | 21.17 ft |
| 16 | April 1, 1960 | 21.00 ft |
| 17 | December 2, 2010 | 20.90 ft |
| 18 | March 12, 2011 | 20.78 ft |
| 19 | April 29, 2011 | 20.13 ft |
| 20 | April 15, 1948 | 20.07 ft |
| 21 | February 23, 1982 | 19.82 ft |
| 22 | March 9, 1956 | 19.80 ft |
| 23 | April 3, 2005 | 19.40 ft |
| 24 | September 12, 2018 | 19.35 ft |
| 25 | February 24, 1981 | 18.83 ft |
Most recent crests
- September 12, 2018: 19.35 ft
- September 8, 2011: 25.91 ft
- April 29, 2011: 20.13 ft
- March 12, 2011: 20.78 ft
- December 2, 2010: 20.90 ft
- April 3, 2005: 19.40 ft
- September 19, 2004: 26.01 ft
- January 9, 1998: 18.80 ft
- January 20, 1996: 25.94 ft
- August 19, 1994: 17.60 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Middle Atlantic River Forecast Center. Forecasts are issued routinely year-round. Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.