LONG TOM − AT MONROE (MNRO3)
   State:  Oregon
   County:  Benton
   Latitude:  44 18' 47" North
   Longitude:  123 17' 43" West
   Elevation:  271 ft

   Supporting NWS Forecast Office: WFO Portland

   
Click for NWS Official River Forecasts for MNRO3
   


   Action Stage:  
8.5 ft
   Flood Stage:  
9 ft
   Moderate Flood Stage:  
11 ft
   Major Flood Stage:  
12 ft
Daily Historical Statistics for June 11, 2026
Mean Stage: 4.45 ft  Mean Flow: 119 cfs
Max Stage: 5.36 ft  Max Flow: 740 cfs (1993)
Min Stage:  4.14 ft   Min Flow: 18 cfs (1987)

Statistics based on water years: 1922-2024
* statistics estimated based on current rating

Record Stage: 
10.42 ft
Record Flow: 
19300 cfs
Date of Record: 
January 2, 1943

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for MNRO3

Data Used In Plot   "label   USACE Observations   USACE Map   


Hydrograph plot for MNRO3

Data Used In Plot   "label   ---