Green River at Lock 2 at Calhoun, KY Water Level Today

NWS river forecast

Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.

Last 30 days

About this gauge

USGS gauge 03320000 sits on the Green River and reads everything draining 7,566 square miles of the Lower Green basin. Only 6,032 square miles of that contributes flow in a normal year; the rest is closed basin that does not drain to the river. Its datum sits 354 feet above sea level NAVD88. Daily flow has been on record here since 1970, 56 years of it.

Where this gauge sits in the drainage

Two gauged sites sit upstream of here. The closest is Green River at Paradise, KY, reading 6,183 square miles. This gauge adds the 1,383 square miles that drain in between.

Normal flows here

The Green River runs a median of 9,245 cfs at this gauge across 56 years of record. February is the fullest month at a median 19,500 cfs, and September the leanest at 1,770 cfs. The highest daily mean on record is 95,100 cfs in 2025, and the lowest is 162 cfs in 1999.

Medians from the USGS daily-statistics record, 1970 to 2025. A month at 100% is running at its own long-term median.

Flood stages and record crests

The Green River reaches flood stage at this gauge at 23 feet. NWS starts watching it at 18 feet. The highest crest on record is 43.8 feet, in January 1937.

Flood categories and crest history from the NOAA National Water Prediction Service, gauge CALK2. Stages are gage height, not depth. Not for navigation.