North Prong St Marys River at Moniac, GA 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 02228500 sits on the North Prong St Marys River and reads everything draining 160 square miles of the St. Marys basin. Daily flow has been on record here since 1921, 81 years of it.

Where this gauge sits in the drainage

No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from St Marys River near Macclenny, FL at 700 square miles, so what passes this gauge is about 23% of the water measured there.

Normal flows here

The North Prong St Marys River runs a median of 41 cfs at this gauge across 81 years of record. February is the fullest month at a median 99 cfs, and May the leanest at 12 cfs. The highest daily mean on record is 11,400 cfs in 1973, and the lowest is 0.0 cfs in 2017.

Medians from the USGS daily-statistics record, 1921 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

The North Prong St Marys River reaches flood stage at this gauge at 12 feet. NWS starts watching it at 10 feet. The highest crest on record is 23 feet, in April 1973.

Flood categories and crest history from the NOAA National Water Prediction Service, gauge MNIG1. Stages are gage height, not depth. Not for navigation.