THUNDER CREEK − NEAR NEWHALEM (THNW1)
   State:  Washington
   County:  Whatcom
   Latitude:  48 40' 22" North
   Longitude:  121 4' 18" West
   Elevation:  1220 ft

   Supporting NWS Forecast Office: WFO Seattle

   
Click for NWS Official River Forecasts for THNW1
   

Daily Historical Statistics for September 11, 2026
Mean Stage: 8.07 ft  Mean Flow: 643 cfs
Max Stage: 9.85 ft  Max Flow: 1950 cfs (2004)
Min Stage:  7.16 ft   Min Flow: 319 cfs (2005)

Statistics based on water years: 1931-2024
* 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 THNW1

Data Used In Plot   "label   USGS Observations