Alcovy River near Lawrenceville, GA

River level and flood forecast · Gwinnett County

Normal-0.3 ftas of Mon 3:30 PM

The river is 15.3 ft below flood stage (15 ft).

The last 7 days and the forecast

-100102030TueWedThuFriSatSunMonAction 12 ftFlood 15 ftModerate 20 ftMajor 25 ftNowObserved (ft)NWS forecast

NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

Major flood stage25 ft
Moderate flood stage20 ft
Flood stage15 ft
Action stage12 ft
Record crest (September 21, 2009)8.28 ft

What floods at each level

From the National Weather Service, highest first.

  • 15 ftMinor flooding of the natural flood plain begins. A new water treatment plant just upstream on the right bank will begin to have water surround it.
  • 12 ftBankfull is reached upstream and downstream from the river gauge at U.S. Highway 29 or Winder Highway.

Highest crests on record

  1. 8.28 ft — September 21, 2009

Recent crests: 8.28 ft (September 21, 2009)

Up and down the river, and nearby

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LWRG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.