North Branch Raritan River near Raritan
Flood levels
Official flood levels at this gauge: action stage begins at 8.0 ft; minor flooding begins at 10.0 ft; moderate flooding begins at 12.0 ft; major flooding begins at 15.0 ft.
| Action stage | 8.0 ft |
|---|---|
| Minor flooding | 10.0 ft |
| Moderate flooding | 12.0 ft |
| Major flooding | 15.0 ft |
Highest recorded crests
- 19.5 ft on Sep 2, 2021 (historic crest)
- 19.0 ft on Sep 16, 1999 (historic crest)
- 18.0 ft on Aug 28, 2011 (historic crest)
- 15.5 ft on Aug 28, 1971 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 8.0 ft | North Branch Park floods. |
|---|---|
| 10.0 ft | Flooding begins along Old York Road and in Branchburg. |
| 12.0 ft | Vaanderveer Avenue in Branchburg begins to flood. |
| 14.0 ft | The first evacuations begin in Branchburg near Route 28 and Vaanderveer Avenue. |
| 15.0 ft | US Route 202 in Branchburg begins to flood, starting with the northbound lanes. Chambers Brook experiences back water causing flooding to occur along Chambers Brook Road. |
| 18.0 ft | Helfreds Landing in Bridgewater floods. |
| 19.0 ft | The bridge on Old York Road between Branchburg and Bridgewater is closed due to flooding. |
| 20.0 ft | US Route 202 is closed. Flooding extends west of Vanderveer Avenue to Burnt Mill Road. |
Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.
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Nearby stations and gauges
- North Branch Raritan River at South Branch NWS gauge · 1.1 mi
- South Branch Raritan River at South Branch NWS gauge · 1.9 mi
- North Branch Raritan River at North Branch Village NWS gauge · 2.1 mi
- Peters Brook at Somerville NWS gauge · 3.3 mi
- Lamington (Black) River at Burnt Mills NWS gauge · 4.5 mi
- Raritan River at Manville NWS gauge · 5.2 mi