Current conditions are given in this table here and on our home page. The values shown are queried from USGS at the time that the page loads on your computer, so it is always the most up to date*. The time of the measurement is also shown. Keep in mind that these are provisional data; the USGS takes periodic field measurements and may need to recalculate data for final approved values (typically a couple times per year).
* The USGS uses multiple internet servers to distribute data in different ways, sometimes the NWIS page may show a slightly more recent measurement than provided by the webservice query shown here.
Trinity River Current Flows
Hover with mouse for details - Click with mouse goes to the USGS NWIS page.
cubic feet per second (cfs)
The table above contains provisional data provided by the USGS via the waterservices site. All data are provisional and may be recalculated before final approval. This table may take several seconds to load.
Problems with this table may be reported to the TRRP Data Steward.
Stream Gage Map
This map provides links to stream gage data across the Trinity River Watershed. Links to the USGS NWIS data will take you to the most current 15-minute data; links to the TRRP’s Online Data Portal (ODP) will give you access to an archive of daily flow values since gages began operations (1911 for the Lewiston gage!), 15 minute measurements for prior water years most active gages back to 1988, plus data for a few gages that were not operated by USGS and are not available in their databases.
Open ODP full page map
Stream Gage Schematic
The schematic diagram below shows the location of stream gage sites on the Trinity River and its tributaries. Click on the gage to be taken to the USGS National Water Information System
Stream Gage Diagram
The National Weather Service provides rainfall and river flow storm predictions for the Trinity River at Burnt Ranch and the Trinity River at Hoopa. The predictions are updated twice daily.