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Hydrograph River at a Glance Download
St. George Creek at Straits Point (IN MLLW) Tide Height (ft)Observed: 0.87 ft at 1:00AM May 04, 2021Observed: 0.69 ft at 2:00AM May 04, 2021Observed: 0.65 ft at 3:00AM May 04, 2021Observed: 0.81 ft at 4:00AM May 04, 2021Observed: 1.14 ft at 5:00AM May 04, 2021Observed: 1.46 ft at 6:00AM May 04, 2021Observed: 1.77 ft at 7:00AM May 04, 2021Observed: 2.01 ft at 8:00AM May 04, 2021Observed: 2.17 ft at 9:00AM May 04, 2021Observed: 2.15 ft at 10:00AM May 04, 2021Observed: 1.91 ft at 11:00AM May 04, 2021Observed: 1.6 ft at 12:00PM May 04, 2021Observed: 1.28 ft at 1:00PM May 04, 2021Observed: 1.04 ft at 2:00PM May 04, 2021Observed: 0.88 ft at 3:00PM May 04, 2021Observed: 0.96 ft at 5:00PM May 04, 2021Observed: 1.29 ft at 6:00PM May 04, 2021Observed: 1.63 ft at 7:00PM May 04, 2021Observed: 1.98 ft at 8:00PM May 04, 2021Observed: 2.18 ft at 9:00PM May 04, 2021Observed: 2.06 ft at 10:00PM May 04, 2021Observed: 2.25 ft at 11:00PM May 04, 2021Observed: 2.05 ft at 12:00AM May 05, 2021Observed: 1.61 ft at 1:00AM May 05, 2021Observed: 1.34 ft at 2:00AM May 05, 2021Observed: 1.12 ft at 3:00AM May 05, 2021Observed: 0.99 ft at 4:00AM May 05, 2021Observed: 1.06 ft at 5:00AM May 05, 2021Observed: 1.39 ft at 6:00AM May 05, 2021Observed: 1.76 ft at 7:00AM May 05, 2021Observed: 2.06 ft at 8:00AM May 05, 2021Observed: 2.26 ft at 9:00AM May 05, 2021Highest Observation: 2.41 ft at 10:00AM May 05, 2021Highest Observation: 2.41 ft at 11:00AM May 05, 2021Observed: 2.18 ft at 12:00PM May 05, 2021Observed: 1.84 ft at 1:00PM May 05, 2021Observed: 1.54 ft at 2:00PM May 05, 2021Observed: 1.27 ft at 3:00PM May 05, 2021Observed: 1.08 ft at 4:00PM May 05, 2021Observed: 1.05 ft at 5:00PM May 05, 2021Observed: 1.25 ft at 6:00PM May 05, 2021Observed: 1.51 ft at 7:00PM May 05, 2021Observed: 1.72 ft at 8:00PM May 05, 2021Observed: 2.16 ft at 9:00PM May 05, 2021Observed: 2.25 ft at 10:00PM May 05, 2021Observed: 2.09 ft at 11:00PM May 05, 2021Observed: 1.92 ft at 12:00AM May 06, 2021Observed: 1.68 ft at 1:00AM May 06, 2021Observed: 1.35 ft at 2:00AM May 06, 2021Observed: 1.02 ft at 3:00AM May 06, 2021Observed: 0.73 ft at 4:00AM May 06, 2021Observed: 0.53 ft at 5:00AM May 06, 2021Observed: 0.47 ft at 6:00AM May 06, 2021Observed: 0.52 ft at 7:00AM May 06, 2021Observed: 0.68 ft at 8:00AM May 06, 2021Observed: 0.91 ft at 9:00AM May 06, 2021Observed: 1.21 ft at 10:00AM May 06, 2021Observed: 1.41 ft at 11:00AM May 06, 2021Observed: 1.37 ft at 12:00PM May 06, 2021Observed: 1.25 ft at 1:00PM May 06, 2021Observed: 1.03 ft at 2:00PM May 06, 2021Observed: 0.74 ft at 3:00PM May 06, 2021Observed: 0.5 ft at 4:00PM May 06, 2021Observed: 0.35 ft at 5:00PM May 06, 2021Observed: 0.38 ft at 6:00PM May 06, 2021Observed: 0.59 ft at 7:00PM May 06, 2021Observed: 0.94 ft at 8:00PM May 06, 2021Observed: 1.31 ft at 9:00PM May 06, 2021Observed: 1.61 ft at 10:00PM May 06, 2021Observed: 1.81 ft at 11:00PM May 06, 2021Observed: 1.89 ft at 12:00AM May 07, 2021Observed: 1.82 ft at 1:00AM May 07, 2021Observed: 1.58 ft at 2:00AM May 07, 2021Observed: 1.3 ft at 3:00AM May 07, 2021Observed: 1.07 ft at 4:00AM May 07, 2021Observed: 0.91 ft at 5:00AM May 07, 2021Observed: 0.84 ft at 6:00AM May 07, 2021Observed: 1.22 ft at 8:00AM May 07, 2021Observed: 1.61 ft at 9:00AM May 07, 2021Observed: 1.96 ft at 10:00AM May 07, 2021Observed: 2.16 ft at 11:00AM May 07, 2021Observed: 2.25 ft at 12:00PM May 07, 2021Observed: 2.19 ft at 1:00PM May 07, 2021Observed: 1.93 ft at 2:00PM May 07, 2021Observed: 1.61 ft at 3:00PM May 07, 2021Observed: 0.83 ft at 6:00PM May 07, 2021Observed: 1.02 ft at 8:00PM May 07, 2021Observed: 1.43 ft at 9:00PM May 07, 2021Observed: 1.79 ft at 10:00PM May 07, 2021Observed: 2.11 ft at 11:00PM May 07, 2021Observed: 2.22 ft at 12:00AM May 08, 2021Observed: 2.12 ft at 1:00AM May 08, 2021Observed: 1.88 ft at 2:00AM May 08, 2021Observed: 0.89 ft at 5:00AM May 08, 2021Observed: -1000 ft at 12:00AM May 09, 2021Forecast: 2 ft 1:00AM May 09, 2021Forecast: 2 ft 2:00AM May 09, 2021Forecast: 1.7 ft 3:00AM May 09, 2021Forecast: 1.3 ft 4:00AM May 09, 2021Forecast: 1.1 ft 5:00AM May 09, 2021Forecast: 0.8 ft 6:00AM May 09, 2021Forecast: 0.6 ft 7:00AM May 09, 2021Forecast: 0.6 ft 8:00AM May 09, 2021Forecast: 0.8 ft 9:00AM May 09, 2021Forecast: 1.1 ft 10:00AM May 09, 2021Forecast: 1.4 ft 11:00AM May 09, 2021Forecast: 1.6 ft 12:00PM May 09, 2021Forecast: 1.8 ft 1:00PM May 09, 2021Forecast: 1.9 ft 2:00PM May 09, 2021Forecast: 1.9 ft 3:00PM May 09, 2021Forecast: 1.6 ft 4:00PM May 09, 2021Forecast: 1.3 ft 5:00PM May 09, 2021Forecast: 1 ft 6:00PM May 09, 2021Forecast: 0.8 ft 7:00PM May 09, 2021Forecast: 1 ft 8:00PM May 09, 2021Forecast: 1.2 ft 9:00PM May 09, 2021Forecast: 1.5 ft 10:00PM May 09, 2021Forecast: 1.8 ft 11:00PM May 09, 2021Forecast: 2.1 ft 12:00AM May 10, 2021Forecast: 2.4 ft 1:00AM May 10, 2021Highest Forecast: 2.5 ft 2:00AM May 10, 2021Forecast: 2.3 ft 3:00AM May 10, 2021Forecast: 2 ft 4:00AM May 10, 2021Forecast: 1.6 ft 5:00AM May 10, 2021Forecast: 1.3 ft 6:00AM May 10, 2021Forecast: 1 ft 7:00AM May 10, 2021Forecast: 1 ft 8:00AM May 10, 2021Forecast: 1 ft 9:00AM May 10, 2021Forecast: 1.2 ft 10:00AM May 10, 2021Forecast: 1.4 ft 11:00AM May 10, 2021Forecast: 1.5 ft 12:00PM May 10, 2021Forecast: 1.7 ft 1:00PM May 10, 2021Forecast: 1.8 ft 2:00PM May 10, 2021Forecast: 1.6 ft 3:00PM May 10, 2021Forecast: 1.4 ft 4:00PM May 10, 2021Forecast: 1.1 ft 5:00PM May 10, 2021Forecast: 0.8 ft 6:00PM May 10, 2021Forecast: 0.6 ft 7:00PM May 10, 2021Forecast: 0.4 ft 8:00PM May 10, 2021Forecast: 0.5 ft 9:00PM May 10, 2021Forecast: 0.6 ft 10:00PM May 10, 2021Forecast: 0.9 ft 11:00PM May 10, 2021Forecast: 1.2 ft 12:00AM May 11, 2021Forecast: 1.5 ft 1:00AM May 11, 2021Forecast: 1.5 ft 2:00AM May 11, 2021Forecast: 1.6 ft 3:00AM May 11, 2021Forecast: 1.5 ft 4:00AM May 11, 2021Forecast: 1.2 ft 5:00AM May 11, 2021Forecast: 0.8 ft 6:00AM May 11, 2021Forecast: 0.5 ft 7:00AM May 11, 2021Forecast: 0.2 ft 8:00AM May 11, 2021Forecast: 0.2 ft 9:00AM May 11, 2021Forecast: 0.3 ft 10:00AM May 11, 2021Forecast: 0.6 ft 11:00AM May 11, 2021Forecast: 0.9 ft 12:00PM May 11, 2021Forecast: 1.1 ft 1:00PM May 11, 2021SGSM2(plotting HMIRZ) Graph Created (12:55AM May 9, 2021)ObservedForecast (issued 2:31PM May 8)Latest observed value: -1000 ft at 12:00 AM EDT 9-May-2021. Flood Stage is 3 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE:  Please refer to Coastal Flood Advisories and Warnings for official water level forecasts during periods of coastal flooding.  During tropical cyclones, please refer here for additional storm surge information.

NOTE: Forecasts for the St. George Creek at Straits Point (IN MLLW) are issued routinely year-round.

Vertical Datum references a tidal datum (MLLW)...for more information see Tides and Currents .

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Flood Categories (in feet)
Major Flood Stage: 5
Moderate Flood Stage: 3.5
Flood Stage: 3
Action Stage: 2.5
Low Stage (in feet): -9999

Historic Crests
(1) 4.56 ft on 09/10/2018
(2) 4.48 ft on 10/12/2019 (P)
(3) 4.39 ft on 03/07/2018
(4) 4.35 ft on 10/12/2019 (P)
(5) 4.30 ft on 09/09/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3.75 ft on 05/01/2020 (P)
(2) 3.65 ft on 04/05/2020 (P)
(3) 4.15 ft on 10/13/2019 (P)
(4) 4.48 ft on 10/12/2019 (P)
(5) 4.35 ft on 10/12/2019 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
5 Significant and widespread inundation is occurring along the lower Tidal Potomac and adjacent tidal tributaries. Numerous roads and structures are affected.
3.5 Water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek.
3 Yards are flooded on Saint George Island, and water will begin covering the road leading to the island, especially if there is wave action.
2.7 Water begins to go over a portion of the bulkhead near the Straits Point bridge, and also covers yards in the St Georges Creek and St Marys River areas.
About This Location Collapse

Latitude: 38.138333° N, Longitude: 76.500000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 3 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available 2.7 MLLW
Additional Information Collapse
Tidal forecast guidance is now available for this location.
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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.
NWS Information
National Weather Service
(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(703) 996-2200
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