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Local Info
Critical Stages
10' - Action12' - Flood17' - Moderate Flood23' - Major Flood
Allegheny River - Gauge OLNN6
Olean, NY
Lat: 42.12N, Lon: 78.42W
 
Latest Observation
 Updated: 3:30 AM EDT 10/8/25
Stage:0.91 ft
Flow:0.091 kcfs*
* Thousand cubic feet per second
Forecast
hydrograph
Flood Impacts
Historical Crests

Data provided by NOAA Advanced Hydrologic Prediction Service

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