West Branch Susquehanna River at Allenwood, PA
River level and flood forecast · Union County
The river is 15.9 ft below flood stage (24 ft).
Forecast to rise to 9.2 ft Wed 2 PM, below the 24 ft flood stage.
Flow: 3,630 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 2:51 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 30 ft |
| Moderate flood stage | 26 ft |
| Flood stage | 24 ft |
| Action stage | 20 ft |
| Record crest (September 11, 2018) | 26.07 ft |
What floods at each level
From the National Weather Service, highest first.
- 32 ftMany homes in Watsontown are affected by high water levels. A number of streets and roads are closed.
- 30 ftMany residences on Canal Street in Watsontown flood. Some homes on Elm Street are also affected. Homes and businesses in other low lying areas are also affected.
- 28 ftA number of homes in the Watsontown area are affected by high water.
- 26 ftHomes in the Park Manor section on the left, or east bank of the river flood.
- 24 ftThe park on the left, or east bank floods. Roadway flooding occurs at a few low lying areas on both sides of the river.
- 22 ftRiver interests are encouraged to monitor conditions for further rises. A few roads in the vacinity of Watsontown are affected by high water.
- 20 ftRiver interests are encouraged to monitor conditions for further rises. A few roads including Routes 405 and 44 between Milton and Watsontown are affected by high water.
Highest crests on record
- 26.07 ft — September 11, 2018
- 24.75 ft — August 10, 2024
- 24.1 ft — April 4, 2024
- 21.35 ft — May 1, 2020
- 20.4 ft — December 22, 2018
Recent crests: 24.75 ft (August 10, 2024) · 24.1 ft (April 4, 2024) · 21.35 ft (May 1, 2020) · 20.4 ft (December 22, 2018) · 26.07 ft (September 11, 2018)
Up and down the river, and nearby
- DownstreamWest Branch Susquehanna River at West Milton, PA
- West Branch Susquehanna River at Lewisburg, PA
- Muncy Creek at Muncy Creek, PA
- Chillisquaque Creek near Potts Grove, PA
- West Branch Susquehanna River at Williamsport, PA
- Chillisquaque Creek at Washingtonville, PA
- Lycoming Creek near Williamsport, PA
- Loyalsock Creek at Loyalsockville, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (ALWP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.