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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.



DID YOU KNOW... Please try our new TEST hydrograph page link at: https://preview.water.noaa.gov/gauges/abcde - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become water.noaa.gov.  Feedback can be provided HERE

Hydrograph River at a Glance Download
Potomac River at Lewisetta (IN MLLW) Tide Height (ft)Observed: 0.68 ft at 7:48PM Nov 30, 2023Observed: 0.66 ft at 7:54PM Nov 30, 2023Observed: 0.65 ft at 8:00PM Nov 30, 2023Observed: 0.63 ft at 8:06PM Nov 30, 2023Observed: 0.61 ft at 8:12PM Nov 30, 2023Observed: 0.59 ft at 8:18PM Nov 30, 2023Observed: 0.58 ft at 8:24PM Nov 30, 2023Observed: 0.57 ft at 8:30PM Nov 30, 2023Observed: 0.54 ft at 8:36PM Nov 30, 2023Observed: 0.54 ft at 8:42PM Nov 30, 2023Observed: 0.53 ft at 8:48PM Nov 30, 2023Observed: 0.52 ft at 8:54PM Nov 30, 2023Observed: 0.51 ft at 9:00PM Nov 30, 2023Observed: 0.51 ft at 9:06PM Nov 30, 2023Observed: 0.5 ft at 9:12PM Nov 30, 2023Observed: 0.5 ft at 9:18PM Nov 30, 2023Observed: 0.5 ft at 9:24PM Nov 30, 2023Observed: 0.49 ft at 9:30PM Nov 30, 2023Observed: 0.49 ft at 9:36PM Nov 30, 2023Observed: 0.49 ft at 9:42PM Nov 30, 2023Observed: 0.49 ft at 9:48PM Nov 30, 2023Observed: 0.48 ft at 9:54PM Nov 30, 2023Observed: 0.5 ft at 10:00PM Nov 30, 2023Observed: 0.49 ft at 10:06PM Nov 30, 2023Observed: 0.49 ft at 10:12PM Nov 30, 2023Observed: 0.51 ft at 10:18PM Nov 30, 2023Observed: 0.52 ft at 10:24PM Nov 30, 2023Observed: 0.53 ft at 10:30PM Nov 30, 2023Observed: 0.52 ft at 10:36PM Nov 30, 2023Observed: 0.53 ft at 10:42PM Nov 30, 2023Observed: 0.54 ft at 10:48PM Nov 30, 2023Observed: 0.56 ft at 10:54PM Nov 30, 2023Observed: 0.59 ft at 11:00PM Nov 30, 2023Observed: 0.61 ft at 11:06PM Nov 30, 2023Observed: 0.63 ft at 11:12PM Nov 30, 2023Observed: 0.66 ft at 11:18PM Nov 30, 2023Observed: 0.69 ft at 11:24PM Nov 30, 2023Observed: 0.71 ft at 11:30PM Nov 30, 2023Observed: 0.75 ft at 11:36PM Nov 30, 2023Observed: 0.77 ft at 11:42PM Nov 30, 2023Observed: 0.79 ft at 11:48PM Nov 30, 2023Observed: 0.83 ft at 11:54PM Nov 30, 2023Observed: 0.85 ft at 12:00AM Dec 01, 2023Observed: 0.88 ft at 12:06AM Dec 01, 2023Observed: 0.91 ft at 12:12AM Dec 01, 2023Observed: 0.95 ft at 12:18AM Dec 01, 2023Observed: 0.98 ft at 12:24AM Dec 01, 2023Observed: 1.01 ft at 12:30AM Dec 01, 2023Observed: 1.03 ft at 12:36AM Dec 01, 2023Observed: 1.05 ft at 12:42AM Dec 01, 2023Observed: 1.08 ft at 12:48AM Dec 01, 2023Observed: 1.1 ft at 12:54AM Dec 01, 2023Observed: 1.14 ft at 1:00AM Dec 01, 2023Observed: 1.16 ft at 1:06AM Dec 01, 2023Observed: 1.19 ft at 1:12AM Dec 01, 2023Observed: 1.2 ft at 1:18AM Dec 01, 2023Observed: 1.22 ft at 1:24AM Dec 01, 2023Observed: 1.24 ft at 1:30AM Dec 01, 2023Observed: 1.27 ft at 1:36AM Dec 01, 2023Observed: 1.29 ft at 1:42AM Dec 01, 2023Observed: 1.31 ft at 1:48AM Dec 01, 2023Observed: 1.32 ft at 1:54AM Dec 01, 2023Observed: 1.34 ft at 2:00AM Dec 01, 2023Observed: 1.37 ft at 2:06AM Dec 01, 2023Observed: 1.39 ft at 2:12AM Dec 01, 2023Observed: 1.4 ft at 2:18AM Dec 01, 2023Observed: 1.42 ft at 2:24AM Dec 01, 2023Observed: 1.44 ft at 2:30AM Dec 01, 2023Observed: 1.46 ft at 2:36AM Dec 01, 2023Observed: 1.48 ft at 2:42AM Dec 01, 2023Observed: 1.5 ft at 2:48AM Dec 01, 2023Observed: 1.52 ft at 2:54AM Dec 01, 2023Observed: 1.52 ft at 3:00AM Dec 01, 2023Observed: 1.53 ft at 3:06AM Dec 01, 2023Observed: 1.54 ft at 3:12AM Dec 01, 2023Observed: 1.55 ft at 3:18AM Dec 01, 2023Observed: 1.55 ft at 3:24AM Dec 01, 2023Observed: 1.56 ft at 3:30AM Dec 01, 2023Observed: 1.55 ft at 3:36AM Dec 01, 2023Observed: 1.55 ft at 3:42AM Dec 01, 2023Observed: 1.55 ft at 3:48AM Dec 01, 2023Observed: 1.55 ft at 3:54AM Dec 01, 2023Observed: 1.55 ft at 4:00AM Dec 01, 2023Observed: 1.55 ft at 4:06AM Dec 01, 2023Observed: 1.54 ft at 4:12AM Dec 01, 2023Observed: 1.55 ft at 4:18AM Dec 01, 2023Observed: 1.54 ft at 4:24AM Dec 01, 2023Observed: 1.53 ft at 4:30AM Dec 01, 2023Observed: 1.52 ft at 4:36AM Dec 01, 2023Observed: 1.51 ft at 4:42AM Dec 01, 2023Observed: 1.5 ft at 4:48AM Dec 01, 2023Observed: 1.48 ft at 4:54AM Dec 01, 2023Observed: 1.47 ft at 5:00AM Dec 01, 2023Observed: 1.46 ft at 5:06AM Dec 01, 2023Observed: 1.43 ft at 5:12AM Dec 01, 2023Observed: 1.42 ft at 5:18AM Dec 01, 2023Observed: 1.4 ft at 5:24AM Dec 01, 2023Observed: 1.38 ft at 5:30AM Dec 01, 2023Observed: 1.36 ft at 5:36AM Dec 01, 2023Observed: 1.33 ft at 5:42AM Dec 01, 2023Observed: 1.31 ft at 5:48AM Dec 01, 2023Observed: 1.28 ft at 5:54AM Dec 01, 2023Observed: 1.26 ft at 6:00AM Dec 01, 2023Observed: 1.23 ft at 6:06AM Dec 01, 2023Observed: 1.21 ft at 6:12AM Dec 01, 2023Observed: 1.18 ft at 6:18AM Dec 01, 2023Observed: 1.16 ft at 6:24AM Dec 01, 2023Observed: 1.13 ft at 6:30AM Dec 01, 2023Observed: 1.11 ft at 6:36AM Dec 01, 2023Observed: 1.09 ft at 6:42AM Dec 01, 2023Observed: 1.07 ft at 6:48AM Dec 01, 2023Observed: 1.04 ft at 6:54AM Dec 01, 2023Observed: 1.02 ft at 7:00AM Dec 01, 2023Observed: 0.99 ft at 7:06AM Dec 01, 2023Observed: 0.95 ft at 7:12AM Dec 01, 2023Observed: 0.92 ft at 7:18AM Dec 01, 2023Observed: 0.9 ft at 7:24AM Dec 01, 2023Observed: 0.88 ft at 7:30AM Dec 01, 2023Observed: 0.85 ft at 7:36AM Dec 01, 2023Observed: 0.83 ft at 7:42AM Dec 01, 2023Observed: 0.8 ft at 7:48AM Dec 01, 2023Observed: 0.78 ft at 7:54AM Dec 01, 2023Observed: 0.76 ft at 8:00AM Dec 01, 2023Observed: 0.74 ft at 8:06AM Dec 01, 2023Observed: 0.73 ft at 8:12AM Dec 01, 2023Observed: 0.71 ft at 8:18AM Dec 01, 2023Observed: 0.69 ft at 8:24AM Dec 01, 2023Observed: 0.67 ft at 8:30AM Dec 01, 2023Observed: 0.66 ft at 8:36AM Dec 01, 2023Observed: 0.63 ft at 8:42AM Dec 01, 2023Observed: 0.61 ft at 8:48AM Dec 01, 2023Observed: 0.59 ft at 8:54AM Dec 01, 2023Observed: 0.58 ft at 9:00AM Dec 01, 2023Observed: 0.58 ft at 9:06AM Dec 01, 2023Observed: 0.56 ft at 9:12AM Dec 01, 2023Observed: 0.56 ft at 9:18AM Dec 01, 2023Observed: 0.55 ft at 9:24AM Dec 01, 2023Observed: 0.55 ft at 9:30AM Dec 01, 2023Observed: 0.54 ft at 9:36AM Dec 01, 2023Observed: 0.53 ft at 9:42AM Dec 01, 2023Observed: 0.52 ft at 9:48AM Dec 01, 2023Observed: 0.52 ft at 9:54AM Dec 01, 2023Observed: 0.51 ft at 10:00AM Dec 01, 2023Observed: 0.51 ft at 10:06AM Dec 01, 2023Observed: 0.52 ft at 10:12AM Dec 01, 2023Observed: 0.51 ft at 10:18AM Dec 01, 2023Observed: 0.51 ft at 10:24AM Dec 01, 2023Observed: 0.52 ft at 10:30AM Dec 01, 2023Observed: 0.53 ft at 10:36AM Dec 01, 2023Observed: 0.54 ft at 10:42AM Dec 01, 2023Observed: 0.55 ft at 10:48AM Dec 01, 2023Observed: 0.58 ft at 10:54AM Dec 01, 2023Observed: 0.59 ft at 11:00AM Dec 01, 2023Observed: 0.61 ft at 11:06AM Dec 01, 2023Observed: 0.63 ft at 11:12AM Dec 01, 2023Observed: 0.65 ft at 11:18AM Dec 01, 2023Observed: 0.68 ft at 11:24AM Dec 01, 2023Observed: 0.7 ft at 11:30AM Dec 01, 2023Observed: 0.74 ft at 11:36AM Dec 01, 2023Observed: 0.76 ft at 11:42AM Dec 01, 2023Observed: 0.79 ft at 11:48AM Dec 01, 2023Observed: 0.81 ft at 11:54AM Dec 01, 2023Observed: 0.85 ft at 12:00PM Dec 01, 2023Observed: 0.88 ft at 12:06PM Dec 01, 2023Observed: 0.91 ft at 12:12PM Dec 01, 2023Observed: 0.94 ft at 12:18PM Dec 01, 2023Observed: 0.99 ft at 12:24PM Dec 01, 2023Observed: 1.01 ft at 12:30PM Dec 01, 2023Observed: 1.04 ft at 12:36PM Dec 01, 2023Observed: 1.07 ft at 12:42PM Dec 01, 2023Observed: 1.08 ft at 12:48PM Dec 01, 2023Observed: 1.12 ft at 12:54PM Dec 01, 2023Observed: 1.15 ft at 1:00PM Dec 01, 2023Observed: 1.17 ft at 1:06PM Dec 01, 2023Observed: 1.2 ft at 1:12PM Dec 01, 2023Observed: 1.22 ft at 1:18PM Dec 01, 2023Observed: 1.26 ft at 1:24PM Dec 01, 2023Observed: 1.28 ft at 1:30PM Dec 01, 2023Observed: 1.31 ft at 1:36PM Dec 01, 2023Observed: 1.34 ft at 1:42PM Dec 01, 2023Observed: 1.36 ft at 1:48PM Dec 01, 2023Observed: 1.38 ft at 1:54PM Dec 01, 2023Observed: 1.41 ft at 2:00PM Dec 01, 2023Observed: 1.43 ft at 2:06PM Dec 01, 2023Observed: 1.44 ft at 2:12PM Dec 01, 2023Observed: 1.47 ft at 2:18PM Dec 01, 2023Observed: 1.5 ft at 2:24PM Dec 01, 2023Observed: 1.52 ft at 2:30PM Dec 01, 2023Observed: 1.55 ft at 2:36PM Dec 01, 2023Observed: 1.56 ft at 2:42PM Dec 01, 2023Observed: 1.57 ft at 2:48PM Dec 01, 2023Observed: 1.59 ft at 2:54PM Dec 01, 2023Observed: 1.6 ft at 3:00PM Dec 01, 2023Observed: 1.61 ft at 3:06PM Dec 01, 2023Observed: 1.63 ft at 3:12PM Dec 01, 2023Observed: 1.64 ft at 3:18PM Dec 01, 2023Observed: 1.65 ft at 3:24PM Dec 01, 2023Observed: 1.66 ft at 3:30PM Dec 01, 2023Observed: 1.65 ft at 3:36PM Dec 01, 2023Observed: 1.67 ft at 3:42PM Dec 01, 2023Observed: 1.68 ft at 3:48PM Dec 01, 2023Observed: 1.69 ft at 3:54PM Dec 01, 2023Observed: 1.7 ft at 4:00PM Dec 01, 2023Observed: 1.7 ft at 4:06PM Dec 01, 2023Observed: 1.7 ft at 4:12PM Dec 01, 2023Observed: 1.7 ft at 4:18PM Dec 01, 2023Observed: 1.69 ft at 4:24PM Dec 01, 2023Observed: 1.7 ft at 4:30PM Dec 01, 2023Observed: 1.71 ft at 4:36PM Dec 01, 2023Observed: 1.71 ft at 4:42PM Dec 01, 2023Observed: 1.71 ft at 4:48PM Dec 01, 2023Observed: 1.71 ft at 4:54PM Dec 01, 2023Observed: 1.71 ft at 5:00PM Dec 01, 2023Observed: 1.69 ft at 5:06PM Dec 01, 2023Observed: 1.68 ft at 5:12PM Dec 01, 2023Observed: 1.67 ft at 5:18PM Dec 01, 2023Observed: 1.65 ft at 5:24PM Dec 01, 2023Observed: 1.64 ft at 5:30PM Dec 01, 2023Observed: 1.64 ft at 5:36PM Dec 01, 2023Observed: 1.63 ft at 5:42PM Dec 01, 2023Observed: 1.62 ft at 5:48PM Dec 01, 2023Observed: 1.59 ft at 5:54PM Dec 01, 2023Observed: 1.56 ft at 6:00PM Dec 01, 2023Observed: 1.53 ft at 6:06PM Dec 01, 2023Observed: 1.5 ft at 6:12PM Dec 01, 2023Observed: 1.47 ft at 6:18PM Dec 01, 2023Observed: 1.45 ft at 6:24PM Dec 01, 2023Observed: 1.42 ft at 6:30PM Dec 01, 2023Observed: 1.38 ft at 6:36PM Dec 01, 2023Observed: 1.35 ft at 6:42PM Dec 01, 2023Observed: 1.25 ft at 7:00PM Dec 01, 2023Observed: 1.22 ft at 7:06PM Dec 01, 2023Observed: 1.19 ft at 7:12PM Dec 01, 2023Observed: 1.17 ft at 7:18PM Dec 01, 2023Observed: 1.14 ft at 7:24PM Dec 01, 2023Observed: 1.11 ft at 7:30PM Dec 01, 2023Observed: 1.09 ft at 7:36PM Dec 01, 2023Observed: 1.08 ft at 7:42PM Dec 01, 2023Observed: 1.05 ft at 7:48PM Dec 01, 2023Observed: 1.02 ft at 7:54PM Dec 01, 2023Observed: 1 ft at 8:00PM Dec 01, 2023Observed: 0.99 ft at 8:06PM Dec 01, 2023Observed: 0.97 ft at 8:12PM Dec 01, 2023Observed: 0.94 ft at 8:18PM Dec 01, 2023Observed: 0.92 ft at 8:24PM Dec 01, 2023Observed: 0.92 ft at 8:30PM Dec 01, 2023Observed: 0.88 ft at 8:36PM Dec 01, 2023Observed: 0.85 ft at 8:42PM Dec 01, 2023Observed: 0.83 ft at 8:48PM Dec 01, 2023Observed: 0.81 ft at 8:54PM Dec 01, 2023Observed: 0.79 ft at 9:00PM Dec 01, 2023Observed: 0.77 ft at 9:06PM Dec 01, 2023Observed: 0.75 ft at 9:12PM Dec 01, 2023Observed: 0.74 ft at 9:18PM Dec 01, 2023Observed: 0.74 ft at 9:24PM Dec 01, 2023Observed: 0.73 ft at 9:30PM Dec 01, 2023Observed: 0.74 ft at 9:36PM Dec 01, 2023Observed: 0.75 ft at 9:42PM Dec 01, 2023Observed: 0.73 ft at 9:48PM Dec 01, 2023Observed: 0.7 ft at 9:54PM Dec 01, 2023Observed: 0.68 ft at 10:00PM Dec 01, 2023Observed: 0.65 ft at 10:06PM Dec 01, 2023Observed: 0.64 ft at 10:12PM Dec 01, 2023Observed: 0.66 ft at 10:18PM Dec 01, 2023Observed: 0.64 ft at 10:24PM Dec 01, 2023Observed: 0.63 ft at 10:30PM Dec 01, 2023Observed: 0.62 ft at 10:36PM Dec 01, 2023Observed: 0.62 ft at 10:42PM Dec 01, 2023Observed: 0.63 ft at 10:48PM Dec 01, 2023Observed: 0.64 ft at 10:54PM Dec 01, 2023Observed: 0.66 ft at 11:00PM Dec 01, 2023Observed: 0.68 ft at 11:06PM Dec 01, 2023Observed: 0.69 ft at 11:12PM Dec 01, 2023Observed: 0.7 ft at 11:18PM Dec 01, 2023Observed: 0.73 ft at 11:24PM Dec 01, 2023Observed: 0.73 ft at 11:30PM Dec 01, 2023Observed: 0.75 ft at 11:36PM Dec 01, 2023Observed: 0.75 ft at 11:42PM Dec 01, 2023Observed: 0.76 ft at 11:48PM Dec 01, 2023Observed: 0.78 ft at 11:54PM Dec 01, 2023Observed: 0.81 ft at 12:00AM Dec 02, 2023Observed: 0.82 ft at 12:06AM Dec 02, 2023Observed: 0.84 ft at 12:12AM Dec 02, 2023Observed: 0.88 ft at 12:18AM Dec 02, 2023Observed: 0.92 ft at 12:24AM Dec 02, 2023Observed: 0.94 ft at 12:30AM Dec 02, 2023Observed: 0.97 ft at 12:36AM Dec 02, 2023Observed: 1.01 ft at 12:42AM Dec 02, 2023Observed: 1.04 ft at 12:48AM Dec 02, 2023Observed: 1.07 ft at 12:54AM Dec 02, 2023Observed: 1.09 ft at 1:00AM Dec 02, 2023Observed: 1.1 ft at 1:06AM Dec 02, 2023Observed: 1.12 ft at 1:12AM Dec 02, 2023Observed: 1.13 ft at 1:18AM Dec 02, 2023Observed: 1.14 ft at 1:24AM Dec 02, 2023Observed: 1.16 ft at 1:30AM Dec 02, 2023Observed: 1.19 ft at 1:36AM Dec 02, 2023Observed: 1.22 ft at 1:42AM Dec 02, 2023Observed: 1.23 ft at 1:48AM Dec 02, 2023Observed: 1.25 ft at 1:54AM Dec 02, 2023Observed: 1.28 ft at 2:00AM Dec 02, 2023Observed: 1.31 ft at 2:06AM Dec 02, 2023Observed: 1.34 ft at 2:12AM Dec 02, 2023Observed: 1.36 ft at 2:18AM Dec 02, 2023Observed: 1.38 ft at 2:24AM Dec 02, 2023Observed: 1.4 ft at 2:30AM Dec 02, 2023Observed: 1.42 ft at 2:36AM Dec 02, 2023Observed: 1.42 ft at 2:42AM Dec 02, 2023Observed: 1.42 ft at 2:48AM Dec 02, 2023Observed: 1.44 ft at 2:54AM Dec 02, 2023Observed: 1.46 ft at 3:00AM Dec 02, 2023Observed: 1.46 ft at 3:06AM Dec 02, 2023Observed: 1.48 ft at 3:12AM Dec 02, 2023Observed: 1.51 ft at 3:18AM Dec 02, 2023Observed: 1.52 ft at 3:24AM Dec 02, 2023Observed: 1.52 ft at 3:30AM Dec 02, 2023Observed: 1.54 ft at 3:36AM Dec 02, 2023Observed: 1.54 ft at 3:42AM Dec 02, 2023Observed: 1.56 ft at 3:48AM Dec 02, 2023Observed: 1.58 ft at 3:54AM Dec 02, 2023Observed: 1.58 ft at 4:00AM Dec 02, 2023Observed: 1.58 ft at 4:06AM Dec 02, 2023Observed: 1.58 ft at 4:12AM Dec 02, 2023Observed: 1.57 ft at 4:18AM Dec 02, 2023Observed: 1.57 ft at 4:24AM Dec 02, 2023Observed: 1.58 ft at 4:30AM Dec 02, 2023Observed: 1.57 ft at 4:36AM Dec 02, 2023Observed: 1.57 ft at 4:42AM Dec 02, 2023Observed: 1.58 ft at 4:48AM Dec 02, 2023Observed: 1.57 ft at 4:54AM Dec 02, 2023Observed: 1.57 ft at 5:00AM Dec 02, 2023Observed: 1.56 ft at 5:06AM Dec 02, 2023Observed: 1.56 ft at 5:12AM Dec 02, 2023Observed: 1.56 ft at 5:18AM Dec 02, 2023Observed: 1.54 ft at 5:24AM Dec 02, 2023Observed: 1.53 ft at 5:30AM Dec 02, 2023Observed: 1.52 ft at 5:36AM Dec 02, 2023Observed: 1.5 ft at 5:42AM Dec 02, 2023Observed: 1.47 ft at 5:48AM Dec 02, 2023Observed: 1.45 ft at 5:54AM Dec 02, 2023Observed: 1.44 ft at 6:00AM Dec 02, 2023Observed: 1.43 ft at 6:06AM Dec 02, 2023Observed: 1.41 ft at 6:12AM Dec 02, 2023Observed: 1.39 ft at 6:18AM Dec 02, 2023Observed: 1.36 ft at 6:24AM Dec 02, 2023Observed: 1.32 ft at 6:30AM Dec 02, 2023Observed: 1.3 ft at 6:36AM Dec 02, 2023Observed: 1.27 ft at 6:42AM Dec 02, 2023Observed: 1.25 ft at 6:48AM Dec 02, 2023Observed: 1.22 ft at 6:54AM Dec 02, 2023Observed: 1.19 ft at 7:00AM Dec 02, 2023Observed: 1.17 ft at 7:06AM Dec 02, 2023Observed: 1.15 ft at 7:12AM Dec 02, 2023Observed: 1.13 ft at 7:18AM Dec 02, 2023Observed: 1.1 ft at 7:24AM Dec 02, 2023Observed: 1.08 ft at 7:30AM Dec 02, 2023Observed: 1.05 ft at 7:36AM Dec 02, 2023Observed: 1.03 ft at 7:42AM Dec 02, 2023Observed: 1 ft at 7:48AM Dec 02, 2023Observed: 0.98 ft at 7:54AM Dec 02, 2023Observed: 0.96 ft at 8:00AM Dec 02, 2023Observed: 0.93 ft at 8:06AM Dec 02, 2023Observed: 0.91 ft at 8:12AM Dec 02, 2023Observed: 0.88 ft at 8:18AM Dec 02, 2023Observed: 0.85 ft at 8:24AM Dec 02, 2023Observed: 0.82 ft at 8:30AM Dec 02, 2023Observed: 0.82 ft at 8:36AM Dec 02, 2023Observed: 0.79 ft at 8:42AM Dec 02, 2023Observed: 0.78 ft at 8:48AM Dec 02, 2023Observed: 0.76 ft at 8:54AM Dec 02, 2023Observed: 0.73 ft at 9:00AM Dec 02, 2023Observed: 0.73 ft at 9:06AM Dec 02, 2023Observed: 0.72 ft at 9:12AM Dec 02, 2023Observed: 0.71 ft at 9:18AM Dec 02, 2023Observed: 0.69 ft at 9:24AM Dec 02, 2023Observed: 0.69 ft at 9:30AM Dec 02, 2023Observed: 0.66 ft at 9:36AM Dec 02, 2023Observed: 0.65 ft at 9:42AM Dec 02, 2023Observed: 0.64 ft at 9:48AM Dec 02, 2023Observed: 0.61 ft at 9:54AM Dec 02, 2023Observed: 0.6 ft at 10:00AM Dec 02, 2023Observed: 0.59 ft at 10:06AM Dec 02, 2023Observed: 0.59 ft at 10:12AM Dec 02, 2023Observed: 0.59 ft at 10:18AM Dec 02, 2023Observed: 0.59 ft at 10:24AM Dec 02, 2023Observed: 0.57 ft at 10:30AM Dec 02, 2023Observed: 0.55 ft at 10:36AM Dec 02, 2023Observed: 0.53 ft at 10:42AM Dec 02, 2023Observed: 0.55 ft at 10:48AM Dec 02, 2023Observed: 0.55 ft at 10:54AM Dec 02, 2023Observed: 0.55 ft at 11:00AM Dec 02, 2023Observed: 0.57 ft at 11:06AM Dec 02, 2023Observed: 0.57 ft at 11:12AM Dec 02, 2023Observed: 0.58 ft at 11:18AM Dec 02, 2023Observed: 0.59 ft at 11:24AM Dec 02, 2023Observed: 0.6 ft at 11:30AM Dec 02, 2023Observed: 0.64 ft at 11:36AM Dec 02, 2023Observed: 0.67 ft at 11:42AM Dec 02, 2023Observed: 0.7 ft at 11:48AM Dec 02, 2023Observed: 0.73 ft at 11:54AM Dec 02, 2023Observed: 0.73 ft at 12:00PM Dec 02, 2023Observed: 0.75 ft at 12:06PM Dec 02, 2023Observed: 0.78 ft at 12:12PM Dec 02, 2023Observed: 0.82 ft at 12:18PM Dec 02, 2023Observed: 0.86 ft at 12:24PM Dec 02, 2023Observed: 0.89 ft at 12:30PM Dec 02, 2023Observed: 0.92 ft at 12:36PM Dec 02, 2023Observed: 0.92 ft at 12:42PM Dec 02, 2023Observed: 0.94 ft at 12:48PM Dec 02, 2023Observed: 0.97 ft at 12:54PM Dec 02, 2023Observed: 0.99 ft at 1:00PM Dec 02, 2023Observed: 1.05 ft at 1:06PM Dec 02, 2023Observed: 1.08 ft at 1:12PM Dec 02, 2023Observed: 1.12 ft at 1:18PM Dec 02, 2023Observed: 1.15 ft at 1:24PM Dec 02, 2023Observed: 1.16 ft at 1:30PM Dec 02, 2023Observed: 1.19 ft at 1:36PM Dec 02, 2023Observed: 1.23 ft at 1:42PM Dec 02, 2023Observed: 1.25 ft at 1:48PM Dec 02, 2023Observed: 1.29 ft at 1:54PM Dec 02, 2023Observed: 1.31 ft at 2:00PM Dec 02, 2023Observed: 1.34 ft at 2:06PM Dec 02, 2023Observed: 1.36 ft at 2:12PM Dec 02, 2023Observed: 1.38 ft at 2:18PM Dec 02, 2023Observed: 1.41 ft at 2:24PM Dec 02, 2023Observed: 1.44 ft at 2:30PM Dec 02, 2023Observed: 1.45 ft at 2:36PM Dec 02, 2023Observed: 1.47 ft at 2:42PM Dec 02, 2023Observed: 1.5 ft at 2:48PM Dec 02, 2023Observed: 1.53 ft at 2:54PM Dec 02, 2023Observed: 1.55 ft at 3:00PM Dec 02, 2023Observed: 1.57 ft at 3:06PM Dec 02, 2023Observed: 1.59 ft at 3:12PM Dec 02, 2023Observed: 1.61 ft at 3:18PM Dec 02, 2023Observed: 1.64 ft at 3:24PM Dec 02, 2023Observed: 1.64 ft at 3:30PM Dec 02, 2023Observed: 1.66 ft at 3:36PM Dec 02, 2023Observed: 1.68 ft at 3:42PM Dec 02, 2023Observed: 1.68 ft at 3:48PM Dec 02, 2023Observed: 1.69 ft at 3:54PM Dec 02, 2023Observed: 1.72 ft at 4:00PM Dec 02, 2023Observed: 1.72 ft at 4:06PM Dec 02, 2023Observed: 1.72 ft at 4:12PM Dec 02, 2023Observed: 1.74 ft at 4:18PM Dec 02, 2023Observed: 1.77 ft at 4:24PM Dec 02, 2023Observed: 1.76 ft at 4:30PM Dec 02, 2023Observed: 1.76 ft at 4:36PM Dec 02, 2023Observed: 1.77 ft at 4:42PM Dec 02, 2023Observed: 1.79 ft at 4:48PM Dec 02, 2023Highest Observation: 1.8 ft at 4:54PM Dec 02, 2023Observed: 1.79 ft at 5:00PM Dec 02, 2023Observed: 1.79 ft at 5:06PM Dec 02, 2023Highest Observation: 1.8 ft at 5:12PM Dec 02, 2023Observed: 1.78 ft at 5:18PM Dec 02, 2023Observed: 1.77 ft at 5:24PM Dec 02, 2023Observed: 1.77 ft at 5:30PM Dec 02, 2023Observed: 1.77 ft at 5:36PM Dec 02, 2023Observed: 1.76 ft at 5:42PM Dec 02, 2023Observed: 1.74 ft at 5:48PM Dec 02, 2023Observed: 1.73 ft at 5:54PM Dec 02, 2023Observed: 1.71 ft at 6:00PM Dec 02, 2023Observed: 1.7 ft at 6:06PM Dec 02, 2023Observed: 1.7 ft at 6:12PM Dec 02, 2023Observed: 1.68 ft at 6:18PM Dec 02, 2023Observed: 1.66 ft at 6:24PM Dec 02, 2023Observed: 1.64 ft at 6:30PM Dec 02, 2023Observed: 1.6 ft at 6:36PM Dec 02, 2023Observed: 1.59 ft at 6:42PM Dec 02, 2023Observed: 1.53 ft at 7:00PM Dec 02, 2023Observed: 1.51 ft at 7:06PM Dec 02, 2023Forecast: 1.3 ft 8:00PM Dec 02, 2023Forecast: 1 ft 9:00PM Dec 02, 2023Forecast: 0.8 ft 10:00PM Dec 02, 2023Forecast: 0.7 ft 11:00PM Dec 02, 2023Forecast: 0.7 ft 12:00AM Dec 03, 2023Forecast: 0.8 ft 1:00AM Dec 03, 2023Forecast: 1.1 ft 2:00AM Dec 03, 2023Forecast: 1.3 ft 3:00AM Dec 03, 2023Forecast: 1.5 ft 4:00AM Dec 03, 2023Forecast: 1.6 ft 5:00AM Dec 03, 2023Forecast: 1.6 ft 6:00AM Dec 03, 2023Forecast: 1.5 ft 7:00AM Dec 03, 2023Forecast: 1.3 ft 8:00AM Dec 03, 2023Forecast: 1 ft 9:00AM Dec 03, 2023Forecast: 1 ft 10:00AM Dec 03, 2023Forecast: 0.8 ft 11:00AM Dec 03, 2023Forecast: 0.8 ft 12:00PM Dec 03, 2023Forecast: 0.9 ft 1:00PM Dec 03, 2023Forecast: 1.1 ft 2:00PM Dec 03, 2023Forecast: 1.5 ft 3:00PM Dec 03, 2023Forecast: 1.7 ft 4:00PM Dec 03, 2023Forecast: 1.9 ft 5:00PM Dec 03, 2023Forecast: 1.9 ft 6:00PM Dec 03, 2023Forecast: 1.8 ft 7:00PM Dec 03, 2023Forecast: 1.6 ft 8:00PM Dec 03, 2023Forecast: 1.4 ft 9:00PM Dec 03, 2023Forecast: 1.2 ft 10:00PM Dec 03, 2023Forecast: 1 ft 11:00PM Dec 03, 2023Forecast: 0.9 ft 12:00AM Dec 04, 2023Forecast: 0.9 ft 1:00AM Dec 04, 2023Forecast: 1.1 ft 2:00AM Dec 04, 2023Forecast: 1.3 ft 3:00AM Dec 04, 2023Forecast: 1.6 ft 4:00AM Dec 04, 2023Forecast: 1.7 ft 5:00AM Dec 04, 2023Forecast: 1.8 ft 6:00AM Dec 04, 2023Forecast: 1.8 ft 7:00AM Dec 04, 2023Forecast: 1.7 ft 8:00AM Dec 04, 2023Forecast: 1.5 ft 9:00AM Dec 04, 2023Forecast: 1.2 ft 10:00AM Dec 04, 2023Forecast: 1.1 ft 11:00AM Dec 04, 2023Forecast: 0.9 ft 12:00PM Dec 04, 2023Forecast: 0.9 ft 1:00PM Dec 04, 2023Forecast: 1 ft 2:00PM Dec 04, 2023Forecast: 1.3 ft 3:00PM Dec 04, 2023Forecast: 1.7 ft 4:00PM Dec 04, 2023Forecast: 1.9 ft 5:00PM Dec 04, 2023Forecast: 2 ft 6:00PM Dec 04, 2023Highest Forecast: 2.1 ft 7:00PM Dec 04, 2023Forecast: 2 ft 8:00PM Dec 04, 2023Forecast: 1.8 ft 9:00PM Dec 04, 2023Forecast: 1.5 ft 10:00PM Dec 04, 2023Forecast: 1.4 ft 11:00PM Dec 04, 2023Forecast: 1.2 ft 12:00AM Dec 05, 2023Forecast: 1.2 ft 1:00AM Dec 05, 2023Forecast: 1.2 ft 2:00AM Dec 05, 2023Forecast: 1.5 ft 3:00AM Dec 05, 2023Forecast: 1.8 ft 4:00AM Dec 05, 2023Forecast: 1.9 ft 5:00AM Dec 05, 2023Forecast: 2 ft 6:00AM Dec 05, 2023Highest Forecast: 2.1 ft 7:00AM Dec 05, 2023Highest Forecast: 2.1 ft 8:00AM Dec 05, 2023Forecast: 2 ft 9:00AM Dec 05, 2023Forecast: 1.7 ft 10:00AM Dec 05, 2023Forecast: 1.5 ft 11:00AM Dec 05, 2023Forecast: 1.3 ft 12:00PM Dec 05, 2023Forecast: 1.2 ft 1:00PM Dec 05, 2023Forecast: 1.2 ft 2:00PM Dec 05, 2023Forecast: 1.4 ft 3:00PM Dec 05, 2023Forecast: 1.6 ft 4:00PM Dec 05, 2023Forecast: 1.8 ft 5:00PM Dec 05, 2023Forecast: 2 ft 6:00PM Dec 05, 2023Highest Forecast: 2.1 ft 7:00PM Dec 05, 2023National Ocean ServiceLWTV2(plotting HMIRG) Graph Created (7:30PM Dec 2, 2023)ObservedForecast (issued 1:31PM Dec 2)Latest observed value: 1.51 ft at 7:06 PM EST 2-Dec-2023. Flood Stage is 3 ft
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Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Tide Forecasts are a total water level forecast referenced to mean lower low water.  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: Please click here for Coastal Flooding Thresholds definitions.

NOTE: Forecasts for the Potomac River at Lewisetta (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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Upstream Gauge - at Alexandria Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 4
Moderate Flood Stage: 3.5
Flood Stage: 3
Action Stage: 2.5
Low Stage (in feet): -1

Historic Crests
(1) 5.76 ft on 09/01/2006
(2) 5.47 ft on 09/18/2003
(3) 4.78 ft on 10/29/2021
(4) 4.54 ft on 08/27/2011
(5) 4.45 ft on 09/10/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3.08 ft on 10/14/2023 (P)
(2) 3.49 ft on 09/28/2023 (P)
(3) 3.95 ft on 09/24/2023 (P)
(4) 3.02 ft on 09/01/2023 (P)
(5) 3.46 ft on 06/21/2023 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -2.85 ft on 04/05/1975
Zoom Level:14
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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
4 Severe flooding will cause extensive inundation and flooding of numerous roads and buildings resulting in a significant threat to property and life. Water will be 2 to 3 feet or more above ground level in some areas. Severe flooding will extend inland from the waterfront and shoreline flooding homes, businesses and isolating some neighborhoods. Numerous roads will be impassable under several feet of water and cars submerged. Some areas will need to be evacuated.
3.5 Widespread flooding of vulnerable areas will result in an elevated threat of property damage to homes and businesses near the waterfront and shoreline. Water will be 1 to 2 feet above ground level in some areas resulting in a sufficient depth to close numerous roads and threaten homes and businesses. Flooding will extend inland from the waterfront along tidal rivers and bays resulting in some road closures and flooding of vehicles.
3 Shallow flooding is expected in the most vulnerable locations near the waterfront and shoreline resulting in a low threat of property damage. Expect up to one foot of water above ground level in low lying, vulnerable areas. Some roads and low lying property including parking lots, parks and lawns near the waterfront will experience shallow flooding.
About This Location Collapse

Latitude: 37.995000° N, Longitude: 76.465000° 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 -0.81 2.19 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available 3 Older USGS topographic maps, NGVD29 benchmarks
MSL -0.74 2.26 Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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Tide Gauge Summary
AKQ Tide Gauge Information 

Outlook Link to Graphic
Dune Erosion Forecast
USGS Coastal Change Viewer
Coastal Inundation Mapping
NOS Sea Level Rise Viewer
Storm Surge Modeling
NWS Storm Surge Modeling

Additional Water and Weather Topics affecting Mid-Atlantic coastal regions:
Wakefield Home Page, Current Weather Observations, Wakefield Coastal Gauge Summary, Lewisetta forecast comparisons,
Wind and Wave Observations, Wind and Wave Height Forecast,, Forecast precipitation, Radar, Tropical Weather,
NOS Tidal Observations, Contact Us


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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
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