How to read USGS flow gauges for steelhead fishing
What does CFS mean?
Cubic feet per second measures the volume of water passing a monitoring station each second. A flow of 200 CFS can mean very different conditions on two rivers, or even different sections of the same river.
Flow and gauge height are different
Gauge height is measured against a station-specific reference level. Five feet on one gauge cannot be compared directly with five feet on another, and is not necessarily the depth at your fishing location.
Watch the direction of change
Look at a sequence of observations. Rising water after rain can change access quickly. Falling water can open opportunities as runoff recedes, but the gauge does not tell you actual water clarity.
Check observation time and station location
A cached page or saved camera image may be older than your visit. Read the observation timestamp and confirm the station is relevant to your stretch. Brandy Run is a tributary reference for Elk Creek, not a main-stem Elk Creek gauge.
Use fishing ranges as context
Steelhead Flow’s angling ranges are reference guidance, not a safety certification or a guarantee of catching fish. Ice, debris, local depth, current and access conditions require your own assessment.