Rivers in Pennsylvania

West Branch Susquehanna River at Allenwood

Union County, PennsylvaniaNWS ALWP1USGS 01553025State College office

Below flood stage
8.48ftStage

Observed Fri, Oct 2, 7:45 AM EDT

Flood stage
24.00 ft
Forecast crest
8.20 ftFri, Oct 2, 2:00 PM EDT
Record crest
26.07 ft2018

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood30.00 ft
Moderate flood26.00 ft
Minor flood24.00 ft
Action20.00 ft
  1. 32.00 ftMany homes in Watsontown are affected by high water levels. A number of streets and roads are closed.
  2. 30.00 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.
  3. 28.00 ftA number of homes in the Watsontown area are affected by high water.
  4. 26.00 ftHomes in the Park Manor section on the left, or east bank of the river flood.
  5. 24.00 ftThe park on the left, or east bank floods. Roadway flooding occurs at a few low lying areas on both sides of the river.
  6. 22.00 ftRiver interests are encouraged to monitor conditions for further rises. A few roads in the vacinity of Watsontown are affected by high water.
  7. 20.00 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.

Crest history

8 crests on NOAA’s list since 2015.

#DateStage
1September 11, 201826.07 ft
2August 10, 202424.75 ft
3April 4, 202424.10 ft
4May 1, 202021.35 ft
5December 22, 201820.40 ft
6May 7, 201719.15 ft
7February 25, 201616.29 ft
8July 11, 201512.19 ft

Most recent crests

  • August 10, 2024: 24.75 ft
  • April 4, 2024: 24.10 ft
  • May 1, 2020: 21.35 ft
  • December 22, 2018: 20.40 ft
  • September 11, 2018: 26.07 ft
  • May 7, 2017: 19.15 ft
  • February 25, 2016: 16.29 ft
  • July 11, 2015: 12.19 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.