Major Flood
9.2 ft
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: RDYD1). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
8.2 ft
Minor Flood
7.2 ft
What Floods at Each Level
9.24 ft
(Mean Lower Low Water (MLLW)) The level reached on April 16, 2011.
9.2 ft
(MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone who attempts to cross on foot or in a vehicle.
8.2 ft
(MLLW) MODERATE FLOODING. At this level, additional roadways near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ begin to flood. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
7.8 ft
(MLLW) Flooding begins along East 12th Street and along the south bank of the Christina River in Wilmington DE. Flooding begins where the Red Clay Creek, the White Clay Creek and the Christina River meet. The area is just to the west and northwest of the New Castle Airport and it includes the communities of Christiana, Glenville and Stanton DE. Flooding begins along the Appoquinimink River in Odessa DE. Flooding begins along NJ Route 49, Quinton-Alloway Road and Sickler Street in Quinton Township NJ.
7.6 ft
(MLLW) Flooding begins along Oldmans Creek at US Route 130 and near Pedrickton NJ. Flooding begins in Penns Grove and Carneys Point NJ. Flooding begins along Riviera Drive and Hook Road in Pennsville Township NJ. Flooding begins along Pointers-Auburn Road in Mannington Township NJ. Flooding begins along NJ Route 45 at the Salem River. Flooding begins along Sinnicksons Landing Road and South Locust Avenue in Elsinboro Township NJ. Flooding begins along Beasley Neck Road in Lower Alloways Township NJ.
7.5 ft
(MLLW) COASTAL FLOOD ADVISORY LEVEL.
7.4 ft
(MLLW) Flooding begins in New Castle DE along the Strand and in the Dobbinsville section. Flooding begins along the section of DE Route 9 to the south of New Castle DE and around the approaches to the DE Route 9 bridge over the Red Lion Creek. Flooding begins in Delaware City DE including the area around the 5th Street bridge. Flooding begins in Port Penn, Augustine Beach and Bay View Beach DE. Flooding begins around the approaches to the DE Route 9 bridge over the Appoquinimink River.
7.2 ft
(MLLW) MINOR FLOODING.
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 |
|---|---|---|
| Apr 15, 2011 | 9.24 ft | — |
| Dec 20, 2012 | 9.19 ft | -9,999 cfs |
| Jan 9, 2024 | 9.12 ft | — |
About This Gauge
NWS LID
RDYD1
River
Delaware Bay
County
New Castle, DE
Coordinates
39.5583°N, 75.5717°W
Get Flood Alerts for Delaware Bay
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 Delaware Bay at Reedy Point (IN MLLW)?
The Delaware Bay at Reedy Point (IN MLLW) 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 Delaware Bay at Reedy Point (IN MLLW)?
The NWS-defined flood stage for Delaware Bay at Reedy Point (IN MLLW) is 7.2 feet. Action stage begins at N/A feet. Moderate flooding starts at 8.2 feet, and major flooding at 9.2 feet.
How do I get alerts when Delaware Bay rises?
Download StormCast free on Google Play, go to River Gauges, and add Delaware Bay at Reedy Point (IN MLLW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Delaware Bay at Reedy Point (IN MLLW) gauge located?
The gauge is located in New Castle County, Delaware at coordinates 39.5583°N, 75.5717°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: NOAA National Ocean Service
- <head> <meta charset="utf-8"> <style type="text/css"> .style1 {background-color: #FFFF00;} </style> </head> Please refer to our <a href="http://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=CFW&format=CI&version=1&glossary=0"> <span class="style1">Coastal Hazard Message</span></a> for specific information regarding Coastal Flood Watches, Warnings and Advisories. Flood impacts are based on long-term averages. Actual impacts from any tidal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow. During tropical cyclones, please refer <span class="style1"> <a href="https://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=TCV&format=CI&version=1&glossary=1">here</a></span> for additional storm surge information.
- <style type="text/css">.style1 { background-color: #FFFF00;}</style> During a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the <a href="http://www.nhc.noaa.gov/"><span class="style1">National Hurricane Center</span> </a>reflects a reasonable worst case scenario. The experimental forecast above is the total water forecast that is expected to occur.