Snake River at Lorenzo, ID

River level and flood forecast · Jefferson County

Normal4.0 ftas of Mon 9:15 PM

Flow: 1,790 cubic feet per second (USGS).

The last 7 days and the forecast

NWS forecast issued Sun, Dec 31, 5 PM. Forecasts change as rain falls and as upstream water arrives.

Get flood alerts for this river

An email when the National Weather Service forecasts Snake River at Lorenzo to flood, when it floods, and when it's over.

Flood stages

Action stage	9 ft
Record crest (June 22, 1997)	13.79 ft

What floods at each level

From the National Weather Service, highest first.

10.7 ftFields and low-lying areas near the river between US HWY 20 bridge near Lorenzo downstream to the confluence of the Snake River and Henrys Fork may experience seep and ponding. The Lorenzo boat launch may be closed due to high flows.
9 ftActual flooding is limited to islands and bars between US HWY 20 bridge near Lorenzo downstream to the confluence of the Snake River and Henrys Fork. Channel changes, including flows between 11,000 to 15,000 CFS into high water channels, may impinge upon levees in the reach and threaten their structural integrity, leading to a breach and possible flooding outside of the levee system. Actions by local agencies may include responding to potential breaches and conducting emergency repairs.

Highest crests on record

13.79 ft — June 22, 1997
11.75 ft — June 26, 1986
11.46 ft — June 10, 1981
11.42 ft — June 16, 1984
11.3 ft — June 14, 2017

Recent crests: 7.74 ft (September 9, 2022) · 9.15 ft (July 23, 2021) · 9.8 ft (June 30, 2020) · 10.8 ft (April 19, 2019) · 10.9 ft (June 19, 2018)

Up and down the river, and nearby

See it on the live map →Radar & warnings for Jefferson County NWS gauge page USGS gauge 13038500

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LORI1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.