Major Flood
28 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
23 ft
Minor Flood
18 ft
Action Stage
14 ft
What Floods at Each Level
40 ft
Approximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
34.2 ft
Flood of record from Hurricane Agnes in 1972.
32.5 ft
Approximate level of the FEMA 1% Annual Chance Flood level (100-year flood).
32 ft
Flood 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 ft
Approximate level of the FEMA 2% Annual Chance Flood level (50-year flood).
28 ft
The 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.
25.5 ft
Approximate level of the FEMA 10% Annual Chance Flood level (10-year flood).
25 ft
Low lying areas on the right, or west bank are affected. The left bank continues to experience inundation.
23 ft
The mobile home park along Route 405 downstream of the bridge will flood.
21 ft
The left, or east bank experiences substantial overflow.
19 ft
Route 405 is affected downstream of the Lewisburg Bridge.
18 ft
The left, or east bank overflows. Low lying areas will flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 23, 1972 | 34.23 ft | 300,000 cfs |
| Mar 18, 1936 | 32.1 ft | 287,000 cfs |
| May 31, 1889 | 29.8 ft | — |
About This Gauge
USGS Site
NWS LID
LWBP1
River
West Branch Susquehanna River
County
Northumberland, PA
Coordinates
40.9676°N, 76.8764°W
Get Flood Alerts for West Branch Susquehanna River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of West Branch Susquehanna River at Lewisburg?
The West Branch Susquehanna River at Lewisburg gauge is maintained by USGS (site 01553500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for West Branch Susquehanna River at Lewisburg?
The NWS-defined flood stage for West Branch Susquehanna River at Lewisburg is 18 feet. Action stage begins at 14 feet. Moderate flooding starts at 23 feet, and major flooding at 28 feet.
How do I get alerts when West Branch Susquehanna River rises?
Download StormCast free on Google Play, go to River Gauges, and add West Branch Susquehanna River at Lewisburg to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the West Branch Susquehanna River at Lewisburg gauge located?
The gauge is located in Northumberland County, Pennsylvania at coordinates 40.9676°N, 76.8764°W. USGS site number: 01553500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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On This River
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.