Nooksack River Level Forecast

The Nooksack River is a beautiful part of Ferndale. But it is not without its hazards. Flooding is something to be prepared for all year round. Keep your eye on the river forecast graph as provided by the Advanced Hydrologic Prediction Service and National Weather Service and shared here.

This graph from NWS Seattle shows recent history and the current forecast for the river level at the point where it flows under the Main Street bridge in Ferndale.

How to read the graph:

Look to the left axis for the river level in feet and recent past and upcoming dates along the bottom axis.

More information from the National Weather Service website:

Flood Categories (in feet)

At 23 feet
The Nooksack River will cause major flooding from near Ferndale downstream to the mouth. Deep and swift flood waters will inundate residential areas…farm lands…and roads. The flood may overtop levees and failures are possible. Flooding will occur all along the river including headwaters…tributaries…and other streams within and near the Nooksack River Basin.

At 20.5 feet
The Nooksack River will cause widespread flooding from near Ferndale downstream to the mouth…with swift waters in residential areas and over farm lands and roads. Erosion may damage some river banks.

At 18 feet
The Nooksack River will cause shallow flooding of low pasture lands along the river from near Ferndale downstream to the mouth.

At 17 feet
The Nooksack River begins spilling over its banks into low pasture lands.

At 15 feet (based on historical observations)

  • Water over the roadway on Ferndale Road north of Marine Drive and also north of Slater Road
  • Water over the roadway at the corner of Barrett and Paradise Roads
  • Flooding of the WDFW parking lot on Marine Drive
  • Water over the roadway at corner of Marine Drive south of Country Lane