NF SKYKOMISH − AT INDEX T INDEX (SNIW1)
   State:  Washington
   County:  Snohomish
   Latitude:  47 49' 9" North
   Longitude:  121 33' 11" West
   Elevation:  560 ft

   Supporting NWS Forecast Office: WFO Seattle
   Click for NWS Official River Forecasts for SNIW1
Daily Historical Statistics for May 11, 2025
Mean Flow: 1730 cfs
Max Flow: 2960 cfs (1917)
Min Flow: 812 cfs (1922)

Statistics based on water years: 1911-1948
* statistics estimated based on current rating

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

Hydrograph plot for SNIW1


For Data Used In Plot   "label