Loyalsock Creek at Loyalsockville, PA
River level and flood forecast · Lycoming County
The river is 10.4 ft below flood stage (12 ft).
Forecast to fall to 1.1 ft by Thu, Oct 15, 2 PM.
Flow: 352 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 | 14 ft |
| Moderate flood stage | 13 ft |
| Flood stage | 12 ft |
| Action stage | 9 ft |
| Record crest (September 8, 2011) | 19.78 ft |
What floods at each level
From the National Weather Service, highest first.
- 28 ftFlood waters begin to reach the Route 973 Bridge in Loyalsocksville.
- 20.5 ftApproximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
- 19.8 ftFlood of record from Tropical Storm Lee in 2011.
- 17 ftApproximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
- 16 ftApproximate level of the FEMA 1% Annual Chance Flood level (100-year flood).
- 14 ftNumerous homes adjacent to the creek are affected by high water levels.
- 13 ftApproximate level of the FEMA 10% Annual Chance Flood level (10-year flood). Several homes and the Loyalsock Game Farm are affected by high water levels.
- 12 ftSeveral residences are affected by high water levels. Mill Street in Montoursville is flooded by Loyalsock Creek.
- 11 ftHigh water prevents access to several homes adjacent to the creek.
- 9 ftResidents living adjacent to the creek are encouraged to monitor water levels for additional rises. The driveways of several homes are affected by high water.
- 8 ftWater is on the bike path under Green Bridge at Montoursville.
Highest crests on record
- 19.78 ft — September 8, 2011
- 17.93 ft — January 19, 1996
- 15.24 ft — September 18, 2004
- 14.74 ft — June 23, 1972
- 14.5 ft — September 26, 1975
Recent crests: 12.45 ft (December 25, 2020) · 12.03 ft (October 21, 2016) · 19.78 ft (September 8, 2011) · 12.42 ft (March 11, 2011) · 15.24 ft (September 18, 2004)
Up and down the river, and nearby
- West Branch Susquehanna River at Williamsport, PA
- Lycoming Creek near Williamsport, PA
- Lycoming Creek near Trout Run (Camp Susque), PA
- Muncy Creek at Muncy Creek, PA
- West Branch Susquehanna River at Allenwood, PA
- Blockhouse Creek near English Center, PA
- West Branch Susquehanna River at Jersey Shore, PA
- Muncy Creek near Sonestown, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LOYP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.