NF STILLAGUAMISH − NEAR ARLINGTON (ARGW1)
   State:  Washington
   County:  Snohomish
   Latitude:  48 15' 38" North
   Longitude:  122 2' 51" West
   Elevation:  89 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for ARGW1

   Action Stage:  
10.7 ft
   Flood Stage:  
13 ft
   Moderate Flood Stage:  
14 ft
   Major Flood Stage:  
15 ft
Daily Historical Statistics for October 18, 2025
Mean Stage: 3.34 ft  Mean Flow: 1520 cfs
Max Stage: 8.31 ft  Max Flow: 10800 cfs (1976)
Min Stage:  1.44 ft   Min Flow: 161 cfs (2023)

Statistics based on water years: 1929-2025
* statistics estimated based on current rating

Record Stage: 
15.59 ft
Record Flow: 
49400 cfs
Date of Record: 
January 8, 2009

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

Hydrograph plot for ARGW1


For Data Used In Plot   "label