Chesapeake Bay at Tolchester Beach (IN MLLW)
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableDownstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.No secondary data available. Transformations for Flow data and a secondary Y axis cannot be made at this time.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/13/2025 10:06 AM EDTOfficial Forecast (FCST) 06/13/2025 5:28 AM EDTCATEGORY STAGE 
Major Flooding 5.5 ft Moderate Flooding 4.5 ft Minor Flooding 3.5 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
Please refer to our Coastal Hazard Message 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 here for additional storm surge information.
During a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the National Hurricane Center reflects a reasonable worst case scenario. The experimental forecast above is the total water forecast that is expected to occur.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 7.91 - (Mean Lower Low Water (MLLW)) The level reached on September 19, 2003 during Hurricane Isabel.
- 5.5 - (MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the bay and its tidal tributaries in Cecil County and Kent County. 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.
- 4.5 - (MLLW) MODERATE FLOODING. At this level, additional roadways near the bay and its tidal tributaries in Cecil County and Kent County 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.
Gauge Info
| Coordinates | 39.2133, -76.2450 |
| RFC | MARFC |
| State | MD |
| WFO | PHI |
| County | Kent |
| Data Provider(s) | |
| NOAA National Ocean Service | National Ocean and Coastal Agency |
Gauge Location
Recent Crests
| 1. | 5.34 ft | on 01-10-2024 |
| 2. | 4.93 ft | on 10-30-2021 |
| 3. | 4.52 ft | on 10-04-2014 |
| 4. | 4.78 ft | on 10-30-2012 |
| 5. | 4.50 ft | on 01-25-2010 |
Recent Crests
| 1. | 5.34 ft | on 01-10-2024 |
| 2. | 4.93 ft | on 10-30-2021 |
| 3. | 4.52 ft | on 10-04-2014 |
| 4. | 4.78 ft | on 10-30-2012 |
| 5. | 4.50 ft | on 01-25-2010 |
| 6. | 4.86 ft | on 09-27-2009 |
| 7. | 7.91 ft | on 09-19-2003 |
| 8. | 4.88 ft | on 09-07-1996 |
| 9. | 4.63 ft | on 03-19-1983 |
Historic Crests
| 1. | 7.91 ft | on 09-19-2003 |
| 2. | 5.34 ft | on 01-10-2024 |
| 3. | 4.93 ft | on 10-30-2021 |
| 4. | 4.88 ft | on 09-07-1996 |
| 5. | 4.86 ft | on 09-27-2009 |
Historic Crests
| 1. | 7.91 ft | on 09-19-2003 |
| 2. | 5.34 ft | on 01-10-2024 |
| 3. | 4.93 ft | on 10-30-2021 |
| 4. | 4.88 ft | on 09-07-1996 |
| 5. | 4.86 ft | on 09-27-2009 |
| 6. | 4.78 ft | on 10-30-2012 |
| 7. | 4.63 ft | on 03-19-1983 |
| 8. | 4.52 ft | on 10-04-2014 |
| 9. | 4.50 ft | on 01-25-2010 |
Low Water Records
Low Water Records
Vertical Datum Table
| type | MLLW* | NAVD88 |
|---|---|---|
| major Flooding | 5.50 ft | 4.58 ft |
| moderate Flooding | 4.50 ft | 3.58 ft |
| minor Flooding | 3.50 ft | 2.58 ft |
| action | N/A | N/A |
| Latest Value | 2.18 ft | 1.26 ft |
| Gauge Zero | 0.00 ft | -0.92 ft |
Gauge Photos
No Images Found
Probability Information
No Images Available
Unique Local Info
All gage data is referenced in MLLW. During winter months, cold and ice may result in inaccurate real-time stages. Adjustments or deletions of this data can only be done after detailed analysis.
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.