South Branch Onancock Creek at Onancock
Virginia — Water Level & Flood Stage
Located in Accomack County, Virginia on the South Branch Onancock Creek. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: ONAV2). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
6.5 ft
Moderate Flood
5.5 ft
Minor Flood
4.5 ft
Action Stage
4 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
6.5 ft
Shore Drive, Harborton Road and Dockview Street in Harborton are flooded with limited access to homes in the area. Most homes in Smithville are surronded by water and inaccessible.
6.3 ft
Peak water level during Hurricane Sandy.
5.5 ft
Martin Road, Evergreen Road and Buckland Way in Smithville are flooded. Some homes are surrounded by water with limited access. In addition, portions of Shore Drive, Dockview Street and Harborton Road, including the parking lot at the Harborton boat ramp, are flooded.
4.5 ft
Minor flooding beings along Pungoteague Creek and adjacent tidal rivers. The Harborton boat ramp begins to flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Dec 17, 2023 | 6.4 ft | — |
| Dec 17, 2023 | 6.4 ft | — |
| Oct 28, 2012 | 6.3 ft | — |
| Oct 28, 2012 | 6.3 ft | — |
| Nov 22, 2023 | 5.9 ft | — |
About This Gauge
NWS LID
ONAV2
River
South Branch Onancock Creek
County
Accomack, VA
Coordinates
37.7111°N, 75.7545°W
Get Flood Alerts for South Branch Onancock Creek
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of South Branch Onancock Creek at Onancock?
The South Branch Onancock Creek at Onancock gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for South Branch Onancock Creek at Onancock?
The NWS-defined flood stage for South Branch Onancock Creek at Onancock is 4.5 feet. Action stage begins at 4 feet. Moderate flooding starts at 5.5 feet, and major flooding at 6.5 feet.
How do I get alerts when South Branch Onancock Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add South Branch Onancock Creek at Onancock to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the South Branch Onancock Creek at Onancock gauge located?
The gauge is located in Accomack County, Virginia at coordinates 37.7111°N, 75.7545°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: VA Depart. of Emergency Management
- The tide heights shown above reference the <a href="https://tidesandcurrents.noaa.gov/datum_options.html"> mean lower low water (MLLW) </a> tidal datum.