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Roanoke River at Williamston, NC (WLLN7)


Data Type




Inundation Levels
NAVD88 Stage

17.0*20.9*
Record Crest: 20.5 ft
16.520.4
16.019.9
15.519.4
15.018.9
14.518.4
14.017.9
13.517.4
13.016.9
12.516.4
12.015.9
11.515.4

Major Flooding Begins

11.014.9
10.514.4
10.013.9
9.513.4

Moderate Flooding Begins

9.012.9
8.512.4

Minor Flooding Begins

8.011.9
7.511.4
7.010.9

Near Flooding Begins

6.510.4
6.09.9

Below Flooding Begins

* = Extended rating
Weather Forecast Office Newport/Morehead City, NC Southeast River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
10.6 ft at 03/19/2024 03:00:00 UTC
Selected Inundation
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
What is UTC time? Map Help

Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Gauge Information Collapse

Map Overlays

Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 13
Flood Stage: 12
Action Stage: 10.5
Low Stage (in feet): -9999

Historic Crests
(1) 20.50 ft on 08/22/1940
(2) 18.10 ft on 01/01/1877
(3) 17.80 ft on 03/15/1912
(4) 16.10 ft on 01/01/1919
(5) 16.00 ft on 04/18/1957
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.34 ft on 11/28/2020
(2) 12.37 ft on 12/01/2018
(3) 12.10 ft on 05/14/2017
(4) 11.61 ft on 10/14/2016
(5) 11.40 ft on 07/17/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1.80 ft on 09/08/1932
(2) 2.20 ft on 11/07/1953
(3) 2.30 ft on 11/07/1931
(4) 3.10 ft on 09/24/1948
(5) 3.50 ft on 12/02/1958

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
17 Homes north and south of Williamston are flooded. Secondary roads adjacent to the river are under water and impassable.
15 Many secondary roads near the river are flooded. Thousands of acres of farmland are flooded. Several homes and livestock areas are threatened around Island Farms.
13 Many acres of farmland are flooded. Water will begin to reach some secondary roads near the river.
12 Widespread low land flooding is expected adjacent to the river. Operations at the water treatment plant in Williamston are impacted by water.
Other Data Sources Collapse
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) 10 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

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Page last modified: 2-Nov-2020 7:34 PM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.