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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 March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.



Hydrograph River at a Glance Download
Cooper River at Charleston Harbor (IN MLLW) Tide Height (ft)Observed: 3.29 ft at 2:18AM Jun 05, 2023Observed: 3.19 ft at 2:24AM Jun 05, 2023Observed: 3.09 ft at 2:30AM Jun 05, 2023Observed: 2.98 ft at 2:36AM Jun 05, 2023Observed: 2.86 ft at 2:42AM Jun 05, 2023Observed: 2.77 ft at 2:48AM Jun 05, 2023Observed: 2.67 ft at 2:54AM Jun 05, 2023Observed: 2.57 ft at 3:00AM Jun 05, 2023Observed: 2.49 ft at 3:06AM Jun 05, 2023Observed: 2.4 ft at 3:12AM Jun 05, 2023Observed: 2.32 ft at 3:18AM Jun 05, 2023Observed: 2.24 ft at 3:24AM Jun 05, 2023Observed: 2.15 ft at 3:36AM Jun 05, 2023Observed: 2.1 ft at 3:42AM Jun 05, 2023Observed: 2 ft at 3:48AM Jun 05, 2023Observed: 2.04 ft at 3:54AM Jun 05, 2023Observed: 2.01 ft at 4:00AM Jun 05, 2023Observed: 1.98 ft at 4:06AM Jun 05, 2023Observed: 1.95 ft at 4:12AM Jun 05, 2023Observed: 2.01 ft at 4:18AM Jun 05, 2023Observed: 2.04 ft at 4:24AM Jun 05, 2023Observed: 2.08 ft at 4:30AM Jun 05, 2023Observed: 2.17 ft at 4:36AM Jun 05, 2023Observed: 2.21 ft at 4:42AM Jun 05, 2023Observed: 2.31 ft at 4:48AM Jun 05, 2023Observed: 2.33 ft at 4:54AM Jun 05, 2023Observed: 2.59 ft at 5:06AM Jun 05, 2023Observed: 2.6 ft at 5:12AM Jun 05, 2023Observed: 2.74 ft at 5:18AM Jun 05, 2023Observed: 2.8 ft at 5:24AM Jun 05, 2023Observed: 2.94 ft at 5:30AM Jun 05, 2023Observed: 3.01 ft at 5:36AM Jun 05, 2023Observed: 3.15 ft at 5:42AM Jun 05, 2023Observed: 3.27 ft at 5:48AM Jun 05, 2023Observed: 3.38 ft at 5:54AM Jun 05, 2023Observed: 3.5 ft at 6:00AM Jun 05, 2023Observed: 3.62 ft at 6:06AM Jun 05, 2023Observed: 3.77 ft at 6:12AM Jun 05, 2023Observed: 3.89 ft at 6:18AM Jun 05, 2023Observed: 4.02 ft at 6:24AM Jun 05, 2023Observed: 4.14 ft at 6:30AM Jun 05, 2023Observed: 4.27 ft at 6:36AM Jun 05, 2023Observed: 4.41 ft at 6:42AM Jun 05, 2023Observed: 4.56 ft at 6:48AM Jun 05, 2023Observed: 4.69 ft at 6:54AM Jun 05, 2023Observed: 4.82 ft at 7:00AM Jun 05, 2023Observed: 4.93 ft at 7:06AM Jun 05, 2023Observed: 5.03 ft at 7:12AM Jun 05, 2023Observed: 5.15 ft at 7:18AM Jun 05, 2023Observed: 5.27 ft at 7:24AM Jun 05, 2023Observed: 5.37 ft at 7:30AM Jun 05, 2023Observed: 5.46 ft at 7:36AM Jun 05, 2023Observed: 5.55 ft at 7:42AM Jun 05, 2023Observed: 5.64 ft at 7:48AM Jun 05, 2023Observed: 5.72 ft at 7:54AM Jun 05, 2023Observed: 5.81 ft at 8:00AM Jun 05, 2023Observed: 5.91 ft at 8:06AM Jun 05, 2023Observed: 5.99 ft at 8:12AM Jun 05, 2023Observed: 6.04 ft at 8:18AM Jun 05, 2023Observed: 6.1 ft at 8:24AM Jun 05, 2023Observed: 6.16 ft at 8:30AM Jun 05, 2023Observed: 6.22 ft at 8:36AM Jun 05, 2023Observed: 6.28 ft at 8:42AM Jun 05, 2023Observed: 6.35 ft at 8:48AM Jun 05, 2023Observed: 6.42 ft at 8:54AM Jun 05, 2023Observed: 6.49 ft at 9:00AM Jun 05, 2023Observed: 6.54 ft at 9:06AM Jun 05, 2023Observed: 6.58 ft at 9:12AM Jun 05, 2023Observed: 6.65 ft at 9:18AM Jun 05, 2023Observed: 6.65 ft at 9:24AM Jun 05, 2023Observed: 6.68 ft at 9:30AM Jun 05, 2023Observed: 6.67 ft at 9:36AM Jun 05, 2023Observed: 6.65 ft at 9:42AM Jun 05, 2023Observed: 6.64 ft at 9:48AM Jun 05, 2023Observed: 6.66 ft at 9:54AM Jun 05, 2023Observed: 6.58 ft at 10:00AM Jun 05, 2023Observed: 6.56 ft at 10:06AM Jun 05, 2023Observed: 6.52 ft at 10:12AM Jun 05, 2023Observed: 6.49 ft at 10:18AM Jun 05, 2023Observed: 6.44 ft at 10:24AM Jun 05, 2023Observed: 6.42 ft at 10:30AM Jun 05, 2023Observed: 6.38 ft at 10:36AM Jun 05, 2023Observed: 6.33 ft at 10:42AM Jun 05, 2023Observed: 6.25 ft at 10:48AM Jun 05, 2023Observed: 6.19 ft at 10:54AM Jun 05, 2023Observed: 6.12 ft at 11:00AM Jun 05, 2023Observed: 6.05 ft at 11:06AM Jun 05, 2023Observed: 5.97 ft at 11:12AM Jun 05, 2023Observed: 5.89 ft at 11:18AM Jun 05, 2023Observed: 5.8 ft at 11:24AM Jun 05, 2023Observed: 5.71 ft at 11:30AM Jun 05, 2023Observed: 5.62 ft at 11:36AM Jun 05, 2023Observed: 5.52 ft at 11:42AM Jun 05, 2023Observed: 5.4 ft at 11:48AM Jun 05, 2023Observed: 5.27 ft at 11:54AM Jun 05, 2023Observed: 5.15 ft at 12:00PM Jun 05, 2023Observed: 5.01 ft at 12:06PM Jun 05, 2023Observed: 4.86 ft at 12:12PM Jun 05, 2023Observed: 4.71 ft at 12:18PM Jun 05, 2023Observed: 4.58 ft at 12:24PM Jun 05, 2023Observed: 4.44 ft at 12:30PM Jun 05, 2023Observed: 4.3 ft at 12:36PM Jun 05, 2023Observed: 4.17 ft at 12:42PM Jun 05, 2023Observed: 4.03 ft at 12:48PM Jun 05, 2023Observed: 3.85 ft at 12:54PM Jun 05, 2023Observed: 3.76 ft at 1:00PM Jun 05, 2023Observed: 3.61 ft at 1:06PM Jun 05, 2023Observed: 3.46 ft at 1:12PM Jun 05, 2023Observed: 3.33 ft at 1:18PM Jun 05, 2023Observed: 3.2 ft at 1:24PM Jun 05, 2023Observed: 3.07 ft at 1:30PM Jun 05, 2023Observed: 2.93 ft at 1:36PM Jun 05, 2023Observed: 2.8 ft at 1:42PM Jun 05, 2023Observed: 2.68 ft at 1:48PM Jun 05, 2023Observed: 2.54 ft at 1:54PM Jun 05, 2023Observed: 2.4 ft at 2:00PM Jun 05, 2023Observed: 2.26 ft at 2:06PM Jun 05, 2023Observed: 2.14 ft at 2:12PM Jun 05, 2023Observed: 2.02 ft at 2:18PM Jun 05, 2023Observed: 1.9 ft at 2:24PM Jun 05, 2023Observed: 1.79 ft at 2:30PM Jun 05, 2023Observed: 1.68 ft at 2:36PM Jun 05, 2023Observed: 1.57 ft at 2:42PM Jun 05, 2023Observed: 1.49 ft at 2:48PM Jun 05, 2023Observed: 1.42 ft at 2:54PM Jun 05, 2023Observed: 1.37 ft at 3:00PM Jun 05, 2023Observed: 1.33 ft at 3:06PM Jun 05, 2023Observed: 1.24 ft at 3:12PM Jun 05, 2023Observed: 1.18 ft at 3:18PM Jun 05, 2023Observed: 1.18 ft at 3:24PM Jun 05, 2023Observed: 1.15 ft at 3:30PM Jun 05, 2023Observed: 1.15 ft at 3:36PM Jun 05, 2023Observed: 1.17 ft at 3:42PM Jun 05, 2023Observed: 1.15 ft at 3:48PM Jun 05, 2023Observed: 1.13 ft at 3:54PM Jun 05, 2023Observed: 1.17 ft at 4:00PM Jun 05, 2023Observed: 1.25 ft at 4:06PM Jun 05, 2023Observed: 1.29 ft at 4:12PM Jun 05, 2023Observed: 1.36 ft at 4:18PM Jun 05, 2023Observed: 1.44 ft at 4:24PM Jun 05, 2023Observed: 1.52 ft at 4:30PM Jun 05, 2023Observed: 1.64 ft at 4:36PM Jun 05, 2023Observed: 1.72 ft at 4:42PM Jun 05, 2023Observed: 1.84 ft at 4:48PM Jun 05, 2023Observed: 1.96 ft at 4:54PM Jun 05, 2023Observed: 2.08 ft at 5:00PM Jun 05, 2023Observed: 2.2 ft at 5:06PM Jun 05, 2023Observed: 2.33 ft at 5:12PM Jun 05, 2023Observed: 2.44 ft at 5:18PM Jun 05, 2023Observed: 2.59 ft at 5:24PM Jun 05, 2023Observed: 2.75 ft at 5:30PM Jun 05, 2023Observed: 2.9 ft at 5:36PM Jun 05, 2023Observed: 3.05 ft at 5:42PM Jun 05, 2023Observed: 3.21 ft at 5:48PM Jun 05, 2023Observed: 3.37 ft at 5:54PM Jun 05, 2023Observed: 3.55 ft at 6:00PM Jun 05, 2023Observed: 3.73 ft at 6:06PM Jun 05, 2023Observed: 3.93 ft at 6:12PM Jun 05, 2023Observed: 4.3 ft at 6:24PM Jun 05, 2023Observed: 2.79 ft at 2:42AM Jun 06, 2023Observed: 2.63 ft at 2:48AM Jun 06, 2023Observed: 2.5 ft at 2:54AM Jun 06, 2023Observed: 2.36 ft at 3:00AM Jun 06, 2023Observed: 2.23 ft at 3:06AM Jun 06, 2023Observed: 2.08 ft at 3:12AM Jun 06, 2023Observed: 1.96 ft at 3:18AM Jun 06, 2023Observed: 1.83 ft at 3:24AM Jun 06, 2023Observed: 1.72 ft at 3:30AM Jun 06, 2023Observed: 1.61 ft at 3:36AM Jun 06, 2023Observed: 1.52 ft at 3:42AM Jun 06, 2023Observed: 1.43 ft at 3:48AM Jun 06, 2023Observed: 1.36 ft at 3:54AM Jun 06, 2023Observed: 1.3 ft at 4:00AM Jun 06, 2023Observed: 1.23 ft at 4:06AM Jun 06, 2023Observed: 1.16 ft at 4:12AM Jun 06, 2023Observed: 1.12 ft at 4:18AM Jun 06, 2023Observed: 1.08 ft at 4:24AM Jun 06, 2023Observed: 1.06 ft at 4:30AM Jun 06, 2023Observed: 1.03 ft at 4:36AM Jun 06, 2023Observed: 1.03 ft at 4:42AM Jun 06, 2023Observed: 1.02 ft at 4:48AM Jun 06, 2023Observed: 1.01 ft at 4:54AM Jun 06, 2023Observed: 1.01 ft at 5:00AM Jun 06, 2023Observed: 1.05 ft at 5:06AM Jun 06, 2023Observed: 1.1 ft at 5:12AM Jun 06, 2023Observed: 1.15 ft at 5:18AM Jun 06, 2023Observed: 1.22 ft at 5:24AM Jun 06, 2023Observed: 1.29 ft at 5:30AM Jun 06, 2023Observed: 1.36 ft at 5:36AM Jun 06, 2023Observed: 1.45 ft at 5:42AM Jun 06, 2023Observed: 1.56 ft at 5:48AM Jun 06, 2023Observed: 1.66 ft at 5:54AM Jun 06, 2023Observed: 1.9 ft at 6:06AM Jun 06, 2023Observed: 2.04 ft at 6:12AM Jun 06, 2023Observed: 2.18 ft at 6:18AM Jun 06, 2023Observed: 2.31 ft at 6:24AM Jun 06, 2023Observed: 2.48 ft at 6:30AM Jun 06, 2023Observed: 2.58 ft at 6:36AM Jun 06, 2023Observed: 2.75 ft at 6:42AM Jun 06, 2023Observed: 2.86 ft at 6:48AM Jun 06, 2023Observed: 3.01 ft at 6:54AM Jun 06, 2023Observed: 3.15 ft at 7:00AM Jun 06, 2023Observed: 3.29 ft at 7:06AM Jun 06, 2023Observed: 3.43 ft at 7:12AM Jun 06, 2023Observed: 3.59 ft at 7:18AM Jun 06, 2023Observed: 3.72 ft at 7:24AM Jun 06, 2023Observed: 3.86 ft at 7:30AM Jun 06, 2023Observed: 4.01 ft at 7:36AM Jun 06, 2023Observed: 4.16 ft at 7:42AM Jun 06, 2023Observed: 4.28 ft at 7:48AM Jun 06, 2023Observed: 4.41 ft at 7:54AM Jun 06, 2023Observed: 4.52 ft at 8:00AM Jun 06, 2023Observed: 4.65 ft at 8:06AM Jun 06, 2023Observed: 4.77 ft at 8:12AM Jun 06, 2023Observed: 4.9 ft at 8:18AM Jun 06, 2023Observed: 5.01 ft at 8:24AM Jun 06, 2023Observed: 5.11 ft at 8:30AM Jun 06, 2023Observed: 5.2 ft at 8:36AM Jun 06, 2023Observed: 5.29 ft at 8:42AM Jun 06, 2023Observed: 5.36 ft at 8:48AM Jun 06, 2023Observed: 5.43 ft at 8:54AM Jun 06, 2023Observed: 5.52 ft at 9:00AM Jun 06, 2023Observed: 5.58 ft at 9:06AM Jun 06, 2023Observed: 5.64 ft at 9:12AM Jun 06, 2023Observed: 5.69 ft at 9:18AM Jun 06, 2023Observed: 5.74 ft at 9:24AM Jun 06, 2023Observed: 5.8 ft at 9:30AM Jun 06, 2023Observed: 5.84 ft at 9:36AM Jun 06, 2023Observed: 5.87 ft at 9:42AM Jun 06, 2023Observed: 5.9 ft at 9:48AM Jun 06, 2023Observed: 5.92 ft at 9:54AM Jun 06, 2023Observed: 5.94 ft at 10:00AM Jun 06, 2023Observed: 5.95 ft at 10:06AM Jun 06, 2023Observed: 5.96 ft at 10:12AM Jun 06, 2023Observed: 5.99 ft at 10:18AM Jun 06, 2023Observed: 5.99 ft at 10:24AM Jun 06, 2023Observed: 6 ft at 10:30AM Jun 06, 2023Observed: 5.98 ft at 10:36AM Jun 06, 2023Observed: 5.96 ft at 10:42AM Jun 06, 2023Observed: 5.94 ft at 10:48AM Jun 06, 2023Observed: 5.84 ft at 10:54AM Jun 06, 2023Observed: 5.87 ft at 11:00AM Jun 06, 2023Observed: 5.78 ft at 11:06AM Jun 06, 2023Observed: 5.74 ft at 11:12AM Jun 06, 2023Observed: 5.69 ft at 11:18AM Jun 06, 2023Observed: 5.64 ft at 11:24AM Jun 06, 2023Observed: 5.57 ft at 11:30AM Jun 06, 2023Observed: 5.49 ft at 11:36AM Jun 06, 2023Observed: 5.4 ft at 11:42AM Jun 06, 2023Observed: 5.32 ft at 11:48AM Jun 06, 2023Observed: 5.23 ft at 11:54AM Jun 06, 2023Observed: 5.13 ft at 12:00PM Jun 06, 2023Observed: 5.04 ft at 12:06PM Jun 06, 2023Observed: 4.95 ft at 12:12PM Jun 06, 2023Observed: 4.86 ft at 12:18PM Jun 06, 2023Observed: 4.75 ft at 12:24PM Jun 06, 2023Observed: 4.64 ft at 12:30PM Jun 06, 2023Observed: 4.52 ft at 12:36PM Jun 06, 2023Observed: 4.41 ft at 12:42PM Jun 06, 2023Observed: 4.28 ft at 12:48PM Jun 06, 2023Observed: 4.15 ft at 12:54PM Jun 06, 2023Observed: 4.02 ft at 1:00PM Jun 06, 2023Observed: 3.88 ft at 1:06PM Jun 06, 2023Observed: 3.73 ft at 1:12PM Jun 06, 2023Observed: 3.58 ft at 1:18PM Jun 06, 2023Observed: 3.44 ft at 1:24PM Jun 06, 2023Observed: 3.3 ft at 1:30PM Jun 06, 2023Observed: 3.15 ft at 1:36PM Jun 06, 2023Observed: 3.01 ft at 1:42PM Jun 06, 2023Observed: 2.87 ft at 1:48PM Jun 06, 2023Observed: 2.74 ft at 1:54PM Jun 06, 2023Observed: 2.6 ft at 2:00PM Jun 06, 2023Observed: 2.48 ft at 2:06PM Jun 06, 2023Observed: 2.34 ft at 2:12PM Jun 06, 2023Observed: 2.19 ft at 2:18PM Jun 06, 2023Observed: 2.06 ft at 2:24PM Jun 06, 2023Observed: 1.89 ft at 2:30PM Jun 06, 2023Observed: 1.79 ft at 2:36PM Jun 06, 2023Observed: 1.65 ft at 2:42PM Jun 06, 2023Observed: 1.56 ft at 2:48PM Jun 06, 2023Observed: 1.43 ft at 2:54PM Jun 06, 2023Observed: 1.31 ft at 3:00PM Jun 06, 2023Observed: 1.21 ft at 3:06PM Jun 06, 2023Observed: 1.11 ft at 3:12PM Jun 06, 2023Observed: 1.02 ft at 3:18PM Jun 06, 2023Observed: 0.94 ft at 3:24PM Jun 06, 2023Observed: 0.88 ft at 3:30PM Jun 06, 2023Observed: 0.81 ft at 3:36PM Jun 06, 2023Observed: 0.75 ft at 3:42PM Jun 06, 2023Observed: 0.69 ft at 3:48PM Jun 06, 2023Observed: 0.64 ft at 3:54PM Jun 06, 2023Observed: 0.6 ft at 4:00PM Jun 06, 2023Observed: 0.57 ft at 4:06PM Jun 06, 2023Observed: 0.55 ft at 4:12PM Jun 06, 2023Observed: 0.53 ft at 4:18PM Jun 06, 2023Observed: 0.51 ft at 4:24PM Jun 06, 2023Observed: 0.49 ft at 4:30PM Jun 06, 2023Observed: 0.48 ft at 4:36PM Jun 06, 2023Observed: 0.48 ft at 4:42PM Jun 06, 2023Observed: 0.52 ft at 4:48PM Jun 06, 2023Observed: 0.55 ft at 4:54PM Jun 06, 2023Observed: 0.59 ft at 5:00PM Jun 06, 2023Observed: 0.63 ft at 5:06PM Jun 06, 2023Observed: 0.68 ft at 5:12PM Jun 06, 2023Observed: 0.74 ft at 5:18PM Jun 06, 2023Observed: 0.82 ft at 5:24PM Jun 06, 2023Observed: 0.91 ft at 5:30PM Jun 06, 2023Observed: 1.03 ft at 5:36PM Jun 06, 2023Observed: 1.14 ft at 5:42PM Jun 06, 2023Observed: 1.28 ft at 5:48PM Jun 06, 2023Observed: 1.4 ft at 5:54PM Jun 06, 2023Observed: 1.53 ft at 6:00PM Jun 06, 2023Observed: 1.67 ft at 6:06PM Jun 06, 2023Observed: 1.81 ft at 6:12PM Jun 06, 2023Observed: 1.96 ft at 6:18PM Jun 06, 2023Observed: 2.12 ft at 6:24PM Jun 06, 2023Observed: 2.28 ft at 6:30PM Jun 06, 2023Observed: 2.45 ft at 6:36PM Jun 06, 2023Observed: 2.6 ft at 6:42PM Jun 06, 2023Observed: 2.76 ft at 6:48PM Jun 06, 2023Observed: 2.92 ft at 6:54PM Jun 06, 2023Observed: 3.11 ft at 7:00PM Jun 06, 2023Observed: 3.25 ft at 7:06PM Jun 06, 2023Observed: 3.45 ft at 7:12PM Jun 06, 2023Observed: 3.63 ft at 7:18PM Jun 06, 2023Observed: 3.79 ft at 7:24PM Jun 06, 2023Observed: 3.95 ft at 7:30PM Jun 06, 2023Observed: 4.13 ft at 7:36PM Jun 06, 2023Observed: 4.24 ft at 7:42PM Jun 06, 2023Observed: 4.41 ft at 7:48PM Jun 06, 2023Observed: 4.87 ft at 8:06PM Jun 06, 2023Observed: 5.04 ft at 8:12PM Jun 06, 2023Observed: 5.18 ft at 8:18PM Jun 06, 2023Observed: 5.31 ft at 8:24PM Jun 06, 2023Observed: 5.42 ft at 8:30PM Jun 06, 2023Observed: 5.53 ft at 8:36PM Jun 06, 2023Observed: 5.66 ft at 8:42PM Jun 06, 2023Observed: 5.77 ft at 8:48PM Jun 06, 2023Observed: 5.9 ft at 8:54PM Jun 06, 2023Observed: 5.99 ft at 9:00PM Jun 06, 2023Observed: 6.07 ft at 9:06PM Jun 06, 2023Observed: 6.16 ft at 9:12PM Jun 06, 2023Observed: 6.25 ft at 9:18PM Jun 06, 2023Observed: 6.33 ft at 9:24PM Jun 06, 2023Observed: 6.38 ft at 9:30PM Jun 06, 2023Observed: 6.46 ft at 9:36PM Jun 06, 2023Observed: 6.54 ft at 9:42PM Jun 06, 2023Observed: 6.58 ft at 9:48PM Jun 06, 2023Observed: 6.63 ft at 9:54PM Jun 06, 2023Observed: 6.7 ft at 10:00PM Jun 06, 2023Observed: 6.76 ft at 10:06PM Jun 06, 2023Observed: 6.8 ft at 10:12PM Jun 06, 2023Observed: 6.84 ft at 10:18PM Jun 06, 2023Observed: 6.87 ft at 10:24PM Jun 06, 2023Observed: 6.91 ft at 10:30PM Jun 06, 2023Observed: 6.93 ft at 10:36PM Jun 06, 2023Observed: 6.95 ft at 10:42PM Jun 06, 2023Observed: 6.98 ft at 10:48PM Jun 06, 2023Highest Observation: 6.99 ft at 10:54PM Jun 06, 2023Observed: 6.98 ft at 11:00PM Jun 06, 2023Observed: 6.98 ft at 11:06PM Jun 06, 2023Highest Observation: 6.99 ft at 11:12PM Jun 06, 2023Highest Observation: 6.99 ft at 11:18PM Jun 06, 2023Observed: 6.97 ft at 11:24PM Jun 06, 2023Observed: 6.93 ft at 11:30PM Jun 06, 2023Observed: 6.78 ft at 11:54PM Jun 06, 2023Observed: 6.72 ft at 12:00AM Jun 07, 2023Observed: 6.63 ft at 12:06AM Jun 07, 2023Observed: 6.56 ft at 12:12AM Jun 07, 2023Observed: 6.47 ft at 12:18AM Jun 07, 2023Observed: 6.37 ft at 12:24AM Jun 07, 2023Observed: 6.27 ft at 12:30AM Jun 07, 2023Observed: 6.17 ft at 12:36AM Jun 07, 2023Observed: 6.07 ft at 12:42AM Jun 07, 2023Observed: 5.97 ft at 12:48AM Jun 07, 2023Observed: 5.86 ft at 12:54AM Jun 07, 2023Observed: 5.76 ft at 1:00AM Jun 07, 2023Observed: 5.66 ft at 1:06AM Jun 07, 2023Observed: 5.54 ft at 1:12AM Jun 07, 2023Observed: 5.43 ft at 1:18AM Jun 07, 2023Observed: 5.3 ft at 1:24AM Jun 07, 2023Observed: 5.16 ft at 1:30AM Jun 07, 2023Observed: 5.03 ft at 1:36AM Jun 07, 2023Observed: 4.87 ft at 1:42AM Jun 07, 2023Observed: 4.72 ft at 1:48AM Jun 07, 2023Observed: 4.57 ft at 1:54AM Jun 07, 2023Observed: 4.43 ft at 2:00AM Jun 07, 2023Observed: 4.3 ft at 2:06AM Jun 07, 2023Observed: 4.13 ft at 2:12AM Jun 07, 2023Observed: 3.99 ft at 2:18AM Jun 07, 2023Observed: 3.84 ft at 2:24AM Jun 07, 2023Observed: 3.7 ft at 2:30AM Jun 07, 2023Observed: 3.55 ft at 2:36AM Jun 07, 2023Observed: 3.41 ft at 2:42AM Jun 07, 2023Observed: 3.28 ft at 2:48AM Jun 07, 2023Observed: 3.14 ft at 2:54AM Jun 07, 2023Observed: 3 ft at 3:00AM Jun 07, 2023Observed: 2.83 ft at 3:06AM Jun 07, 2023Observed: 2.69 ft at 3:12AM Jun 07, 2023Observed: 2.56 ft at 3:18AM Jun 07, 2023Observed: 2.43 ft at 3:24AM Jun 07, 2023Observed: 2.28 ft at 3:30AM Jun 07, 2023Observed: 2.14 ft at 3:36AM Jun 07, 2023Observed: 2.02 ft at 3:42AM Jun 07, 2023Observed: 1.88 ft at 3:48AM Jun 07, 2023Observed: 1.73 ft at 3:54AM Jun 07, 2023Observed: 1.63 ft at 4:00AM Jun 07, 2023Observed: 1.5 ft at 4:06AM Jun 07, 2023Observed: 1.34 ft at 4:12AM Jun 07, 2023Observed: 1.23 ft at 4:18AM Jun 07, 2023Observed: 1.14 ft at 4:24AM Jun 07, 2023Observed: 1.07 ft at 4:30AM Jun 07, 2023Observed: 0.98 ft at 4:36AM Jun 07, 2023Observed: 0.88 ft at 4:42AM Jun 07, 2023Observed: 0.79 ft at 4:48AM Jun 07, 2023Observed: 0.73 ft at 4:54AM Jun 07, 2023Observed: 0.65 ft at 5:00AM Jun 07, 2023Observed: 0.58 ft at 5:06AM Jun 07, 2023Observed: 0.54 ft at 5:12AM Jun 07, 2023Observed: 0.5 ft at 5:18AM Jun 07, 2023Observed: 0.45 ft at 5:24AM Jun 07, 2023Observed: 0.43 ft at 5:30AM Jun 07, 2023Observed: 0.4 ft at 5:36AM Jun 07, 2023Observed: 0.4 ft at 5:42AM Jun 07, 2023Observed: 0.42 ft at 5:48AM Jun 07, 2023Observed: 0.46 ft at 5:54AM Jun 07, 2023Observed: 0.5 ft at 6:00AM Jun 07, 2023Observed: 0.55 ft at 6:06AM Jun 07, 2023Observed: 0.62 ft at 6:12AM Jun 07, 2023Observed: 0.7 ft at 6:18AM Jun 07, 2023Observed: 0.8 ft at 6:24AM Jun 07, 2023Observed: 0.92 ft at 6:30AM Jun 07, 2023Observed: 1.02 ft at 6:36AM Jun 07, 2023Observed: 1.13 ft at 6:42AM Jun 07, 2023Observed: 1.25 ft at 6:48AM Jun 07, 2023Observed: 1.37 ft at 6:54AM Jun 07, 2023Observed: 1.49 ft at 7:00AM Jun 07, 2023Observed: 1.62 ft at 7:06AM Jun 07, 2023Observed: 1.76 ft at 7:12AM Jun 07, 2023Observed: 1.89 ft at 7:18AM Jun 07, 2023Observed: 2.01 ft at 7:24AM Jun 07, 2023Observed: 2.13 ft at 7:30AM Jun 07, 2023Observed: 2.26 ft at 7:36AM Jun 07, 2023Observed: 2.42 ft at 7:42AM Jun 07, 2023Observed: 2.57 ft at 7:48AM Jun 07, 2023Observed: 2.73 ft at 7:54AM Jun 07, 2023Observed: 2.88 ft at 8:00AM Jun 07, 2023Observed: 3.02 ft at 8:06AM Jun 07, 2023Observed: 3.16 ft at 8:12AM Jun 07, 2023Observed: 3.3 ft at 8:18AM Jun 07, 2023Observed: 3.44 ft at 8:24AM Jun 07, 2023Observed: 3.58 ft at 8:30AM Jun 07, 2023Observed: 3.7 ft at 8:36AM Jun 07, 2023Observed: 3.82 ft at 8:42AM Jun 07, 2023Observed: 3.93 ft at 8:48AM Jun 07, 2023Observed: 4.06 ft at 8:54AM Jun 07, 2023Observed: 4.17 ft at 9:00AM Jun 07, 2023Observed: 4.28 ft at 9:06AM Jun 07, 2023Observed: 4.4 ft at 9:12AM Jun 07, 2023Observed: 4.51 ft at 9:18AM Jun 07, 2023Observed: 4.61 ft at 9:24AM Jun 07, 2023Observed: 4.73 ft at 9:30AM Jun 07, 2023Observed: 4.83 ft at 9:36AM Jun 07, 2023Observed: 4.91 ft at 9:42AM Jun 07, 2023Observed: 5 ft at 9:48AM Jun 07, 2023Observed: 5.08 ft at 9:54AM Jun 07, 2023Observed: 5.15 ft at 10:00AM Jun 07, 2023Observed: 5.21 ft at 10:06AM Jun 07, 2023Observed: 5.34 ft at 10:18AM Jun 07, 2023Observed: 5.42 ft at 10:24AM Jun 07, 2023Observed: 5.47 ft at 10:30AM Jun 07, 2023Observed: 5.51 ft at 10:36AM Jun 07, 2023Observed: 5.55 ft at 10:42AM Jun 07, 2023Observed: 5.58 ft at 10:48AM Jun 07, 2023Observed: 5.61 ft at 10:54AM Jun 07, 2023Observed: 5.63 ft at 11:00AM Jun 07, 2023Observed: 5.65 ft at 11:06AM Jun 07, 2023Observed: 5.68 ft at 11:18AM Jun 07, 2023Observed: 5.69 ft at 11:24AM Jun 07, 2023Observed: 5.68 ft at 11:30AM Jun 07, 2023Observed: 5.66 ft at 11:36AM Jun 07, 2023Observed: 5.64 ft at 11:42AM Jun 07, 2023Observed: 5.61 ft at 11:48AM Jun 07, 2023Observed: 5.56 ft at 11:54AM Jun 07, 2023Observed: 5.52 ft at 12:00PM Jun 07, 2023Observed: 5.48 ft at 12:06PM Jun 07, 2023Observed: 5.42 ft at 12:12PM Jun 07, 2023Observed: 5.37 ft at 12:18PM Jun 07, 2023Observed: 5.32 ft at 12:24PM Jun 07, 2023Observed: 5.27 ft at 12:30PM Jun 07, 2023Observed: 5.21 ft at 12:36PM Jun 07, 2023Observed: 5.15 ft at 12:42PM Jun 07, 2023Observed: 5.09 ft at 12:48PM Jun 07, 2023Observed: 5.02 ft at 12:54PM Jun 07, 2023Observed: 4.93 ft at 1:00PM Jun 07, 2023Observed: 4.85 ft at 1:06PM Jun 07, 2023Observed: 4.77 ft at 1:12PM Jun 07, 2023Observed: 4.68 ft at 1:18PM Jun 07, 2023Observed: 4.57 ft at 1:24PM Jun 07, 2023Observed: 4.46 ft at 1:30PM Jun 07, 2023Observed: 4.35 ft at 1:36PM Jun 07, 2023Observed: 4.23 ft at 1:42PM Jun 07, 2023Observed: 4.12 ft at 1:48PM Jun 07, 2023Observed: 4 ft at 1:54PM Jun 07, 2023Observed: 3.87 ft at 2:00PM Jun 07, 2023Observed: 3.75 ft at 2:06PM Jun 07, 2023Observed: 3.63 ft at 2:12PM Jun 07, 2023Observed: 3.49 ft at 2:18PM Jun 07, 2023Observed: 3.37 ft at 2:24PM Jun 07, 2023Observed: 3.23 ft at 2:30PM Jun 07, 2023Observed: 3.09 ft at 2:36PM Jun 07, 2023Observed: 2.96 ft at 2:42PM Jun 07, 2023Observed: 2.82 ft at 2:48PM Jun 07, 2023Observed: 2.69 ft at 2:54PM Jun 07, 2023Observed: 2.54 ft at 3:00PM Jun 07, 2023Observed: 2.41 ft at 3:06PM Jun 07, 2023Observed: 2.28 ft at 3:12PM Jun 07, 2023Observed: 2.16 ft at 3:18PM Jun 07, 2023Observed: 2.03 ft at 3:24PM Jun 07, 2023Observed: 1.9 ft at 3:30PM Jun 07, 2023Observed: 1.77 ft at 3:36PM Jun 07, 2023Observed: 1.64 ft at 3:42PM Jun 07, 2023Observed: 1.53 ft at 3:48PM Jun 07, 2023Observed: 1.42 ft at 3:54PM Jun 07, 2023Observed: 1.32 ft at 4:00PM Jun 07, 2023Observed: 1.21 ft at 4:06PM Jun 07, 2023Observed: 1.12 ft at 4:12PM Jun 07, 2023Observed: 1.03 ft at 4:18PM Jun 07, 2023Observed: 0.94 ft at 4:24PM Jun 07, 2023Observed: 0.86 ft at 4:30PM Jun 07, 2023Observed: 0.79 ft at 4:36PM Jun 07, 2023Observed: 0.73 ft at 4:42PM Jun 07, 2023Observed: 0.7 ft at 4:48PM Jun 07, 2023Observed: 0.65 ft at 4:54PM Jun 07, 2023Observed: 0.57 ft at 5:00PM Jun 07, 2023Observed: 0.56 ft at 5:06PM Jun 07, 2023Observed: 0.43 ft at 5:12PM Jun 07, 2023Observed: 0.44 ft at 5:18PM Jun 07, 2023Observed: 0.46 ft at 5:24PM Jun 07, 2023Observed: 0.46 ft at 5:30PM Jun 07, 2023Observed: 0.49 ft at 5:36PM Jun 07, 2023Observed: 0.53 ft at 5:42PM Jun 07, 2023Observed: 0.57 ft at 5:48PM Jun 07, 2023Observed: 0.6 ft at 5:54PM Jun 07, 2023Observed: 0.64 ft at 6:00PM Jun 07, 2023Observed: 0.67 ft at 6:06PM Jun 07, 2023Observed: 0.74 ft at 6:12PM Jun 07, 2023Observed: 0.83 ft at 6:18PM Jun 07, 2023Observed: 0.95 ft at 6:24PM Jun 07, 2023Observed: 1.07 ft at 6:30PM Jun 07, 2023Observed: 1.21 ft at 6:36PM Jun 07, 2023Observed: 1.35 ft at 6:42PM Jun 07, 2023Observed: 1.49 ft at 6:48PM Jun 07, 2023Observed: 1.65 ft at 6:54PM Jun 07, 2023Observed: 1.81 ft at 7:00PM Jun 07, 2023Observed: 1.94 ft at 7:06PM Jun 07, 2023Observed: 2.08 ft at 7:12PM Jun 07, 2023Observed: 2.22 ft at 7:18PM Jun 07, 2023Observed: 2.39 ft at 7:24PM Jun 07, 2023Observed: 2.55 ft at 7:30PM Jun 07, 2023Observed: 2.7 ft at 7:36PM Jun 07, 2023Observed: 2.85 ft at 7:42PM Jun 07, 2023Observed: 3.04 ft at 7:48PM Jun 07, 2023Observed: 3.52 ft at 8:06PM Jun 07, 2023Observed: 3.75 ft at 8:12PM Jun 07, 2023Observed: 3.9 ft at 8:18PM Jun 07, 2023Observed: 4.02 ft at 8:24PM Jun 07, 2023Observed: 4.16 ft at 8:30PM Jun 07, 2023Observed: 4.39 ft at 8:36PM Jun 07, 2023Observed: 4.58 ft at 8:42PM Jun 07, 2023Observed: 4.73 ft at 8:48PM Jun 07, 2023Observed: 4.84 ft at 8:54PM Jun 07, 2023Observed: 4.97 ft at 9:00PM Jun 07, 2023Observed: 5.13 ft at 9:06PM Jun 07, 2023Observed: 5.28 ft at 9:12PM Jun 07, 2023Observed: 5.39 ft at 9:18PM Jun 07, 2023Observed: 5.49 ft at 9:24PM Jun 07, 2023Observed: 5.62 ft at 9:30PM Jun 07, 2023Observed: 5.74 ft at 9:36PM Jun 07, 2023Observed: 5.84 ft at 9:42PM Jun 07, 2023Observed: 5.93 ft at 9:48PM Jun 07, 2023Observed: 6.07 ft at 9:54PM Jun 07, 2023Observed: 6.14 ft at 10:00PM Jun 07, 2023Observed: 6.28 ft at 10:06PM Jun 07, 2023Observed: 6.35 ft at 10:12PM Jun 07, 2023Observed: 6.4 ft at 10:18PM Jun 07, 2023Observed: 6.45 ft at 10:24PM Jun 07, 2023Observed: 6.51 ft at 10:30PM Jun 07, 2023Observed: 6.57 ft at 10:36PM Jun 07, 2023Observed: 6.59 ft at 10:42PM Jun 07, 2023Observed: 6.65 ft at 10:48PM Jun 07, 2023Observed: 6.73 ft at 10:54PM Jun 07, 2023Observed: 6.8 ft at 11:00PM Jun 07, 2023Observed: 6.84 ft at 11:06PM Jun 07, 2023Observed: 6.85 ft at 11:12PM Jun 07, 2023Observed: 6.92 ft at 11:18PM Jun 07, 2023Observed: 6.94 ft at 11:24PM Jun 07, 2023Observed: 6.93 ft at 11:30PM Jun 07, 2023Observed: 6.91 ft at 11:36PM Jun 07, 2023Observed: 6.91 ft at 11:42PM Jun 07, 2023Observed: 6.93 ft at 11:48PM Jun 07, 2023Observed: 6.93 ft at 11:54PM Jun 07, 2023Observed: 6.88 ft at 12:00AM Jun 08, 2023Observed: 6.85 ft at 12:06AM Jun 08, 2023Observed: 6.83 ft at 12:12AM Jun 08, 2023Observed: 6.82 ft at 12:18AM Jun 08, 2023Observed: 6.8 ft at 12:24AM Jun 08, 2023Observed: 6.77 ft at 12:30AM Jun 08, 2023Observed: 6.73 ft at 12:36AM Jun 08, 2023Observed: 6.66 ft at 12:42AM Jun 08, 2023Observed: 6.61 ft at 12:48AM Jun 08, 2023Observed: 6.53 ft at 12:54AM Jun 08, 2023Observed: 6.43 ft at 1:00AM Jun 08, 2023Observed: 6.34 ft at 1:06AM Jun 08, 2023Observed: 6.26 ft at 1:12AM Jun 08, 2023Observed: 6.19 ft at 1:18AM Jun 08, 2023Observed: 6.12 ft at 1:24AM Jun 08, 2023Observed: 6.07 ft at 1:30AM Jun 08, 2023Observed: 6.03 ft at 1:36AM Jun 08, 2023Observed: 5.97 ft at 1:42AM Jun 08, 2023Observed: 5.9 ft at 1:48AM Jun 08, 2023Forecast: 4 ft 3:00AM Jun 08, 2023Forecast: 2.4 ft 4:00AM Jun 08, 2023Forecast: 1.1 ft 5:00AM Jun 08, 2023Forecast: 0.5 ft 6:00AM Jun 08, 2023Forecast: 1 ft 7:00AM Jun 08, 2023Forecast: 2.1 ft 8:00AM Jun 08, 2023Forecast: 3.5 ft 9:00AM Jun 08, 2023Forecast: 4.8 ft 10:00AM Jun 08, 2023Forecast: 5.6 ft 11:00AM Jun 08, 2023Forecast: 6 ft 12:00PM Jun 08, 2023Forecast: 5.9 ft 1:00PM Jun 08, 2023Forecast: 5.2 ft 2:00PM Jun 08, 2023Forecast: 4 ft 3:00PM Jun 08, 2023Forecast: 2.6 ft 4:00PM Jun 08, 2023Forecast: 1.5 ft 5:00PM Jun 08, 2023Forecast: 0.8 ft 6:00PM Jun 08, 2023Forecast: 1.1 ft 7:00PM Jun 08, 2023Forecast: 1.9 ft 8:00PM Jun 08, 2023Forecast: 3.2 ft 9:00PM Jun 08, 2023Forecast: 4.6 ft 10:00PM Jun 08, 2023Forecast: 5.8 ft 11:00PM Jun 08, 2023Forecast: 6.5 ft 12:00AM Jun 09, 2023Forecast: 6.7 ft 1:00AM Jun 09, 2023Forecast: 6.4 ft 2:00AM Jun 09, 2023Forecast: 5.4 ft 3:00AM Jun 09, 2023Forecast: 3.9 ft 4:00AM Jun 09, 2023Forecast: 2.3 ft 5:00AM Jun 09, 2023Forecast: 1 ft 6:00AM Jun 09, 2023Forecast: 0.5 ft 7:00AM Jun 09, 2023Forecast: 1.3 ft 8:00AM Jun 09, 2023Forecast: 2.2 ft 9:00AM Jun 09, 2023Forecast: 3.6 ft 10:00AM Jun 09, 2023Forecast: 4.8 ft 11:00AM Jun 09, 2023Forecast: 5.7 ft 12:00PM Jun 09, 2023Forecast: 6.1 ft 1:00PM Jun 09, 2023Forecast: 6.1 ft 2:00PM Jun 09, 2023Forecast: 5.3 ft 3:00PM Jun 09, 2023Forecast: 4.2 ft 4:00PM Jun 09, 2023Forecast: 2.8 ft 5:00PM Jun 09, 2023Forecast: 1.7 ft 6:00PM Jun 09, 2023Forecast: 1.2 ft 7:00PM Jun 09, 2023Forecast: 1.3 ft 8:00PM Jun 09, 2023Forecast: 2.2 ft 9:00PM Jun 09, 2023Forecast: 3.6 ft 10:00PM Jun 09, 2023Forecast: 4.9 ft 11:00PM Jun 09, 2023Forecast: 5.9 ft 12:00AM Jun 10, 2023Forecast: 6.6 ft 1:00AM Jun 10, 2023Highest Forecast: 6.8 ft 2:00AM Jun 10, 2023Forecast: 6.5 ft 3:00AM Jun 10, 2023Forecast: 5.4 ft 4:00AM Jun 10, 2023Forecast: 3.9 ft 5:00AM Jun 10, 2023Forecast: 2.3 ft 6:00AM Jun 10, 2023Forecast: 1.1 ft 7:00AM Jun 10, 2023Forecast: 0.8 ft 8:00AM Jun 10, 2023Forecast: 1.2 ft 9:00AM Jun 10, 2023Forecast: 2.4 ft 10:00AM Jun 10, 2023Forecast: 3.7 ft 11:00AM Jun 10, 2023Forecast: 5 ft 12:00PM Jun 10, 2023Forecast: 5.8 ft 1:00PM Jun 10, 2023Forecast: 6.2 ft 2:00PM Jun 10, 2023Forecast: 6.2 ft 3:00PM Jun 10, 2023Forecast: 5.5 ft 4:00PM Jun 10, 2023Forecast: 4.4 ft 5:00PM Jun 10, 2023Forecast: 3.1 ft 6:00PM Jun 10, 2023Forecast: 1.9 ft 7:00PM Jun 10, 2023Forecast: 1.2 ft 8:00PM Jun 10, 2023Forecast: 1.4 ft 9:00PM Jun 10, 2023Forecast: 2.2 ft 10:00PM Jun 10, 2023Forecast: 3.4 ft 11:00PM Jun 10, 2023Forecast: 4.7 ft 12:00AM Jun 11, 2023Forecast: 5.7 ft 1:00AM Jun 11, 2023Forecast: 6.4 ft 2:00AM Jun 11, 2023NOAA National Ocean ServiceCHTS1(plotting HMIRP) Graph Created (2:17AM Jun 8, 2023)ObservedForecast (issued 9:55PM Jun 7)Latest observed value: 5.9 ft at 1:48 AM EDT 8-Jun-2023. Flood Stage is 7 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: During a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the National Hurricane Center (go to the web site and select the storm of interest) reflects a reasonable worst case scenario. The forecast above is the total water forecast that is most likely to occur.

NOTE: Forecasts for the Cooper River at Charleston Harbor (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 HW-17 (IN MLLW) Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 8
Moderate Flood Stage: 7.5
Flood Stage: 7
Action Stage: 6.5
Low Stage (in feet): -1.5

Historic Crests
(1) 12.52 ft on 09/22/1989
(2) 10.23 ft on 08/11/1940
(3) 9.92 ft on 09/11/2017
(4) 9.29 ft on 10/08/2016
(5) 8.81 ft on 01/01/1987
(6) 8.76 ft on 11/24/2018
(7) 8.69 ft on 10/27/2015
(8) 8.64 ft on 05/28/1934
(9) 8.64 ft on 09/04/1979
(10) 8.51 ft on 11/07/2021
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.37 ft on 06/04/2023 (P)
(2) 8.09 ft on 05/18/2023 (P)
(3) 8.31 ft on 12/22/2022
(4) 8.35 ft on 11/10/2022
(5) 8.14 ft on 09/09/2022
(6) 7.94 ft on 06/15/2022
(7) 8.26 ft on 11/08/2021
(8) 8.51 ft on 11/07/2021
(9) 8.44 ft on 11/06/2021
(10) 8.00 ft on 11/05/2021
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -4.08 ft on 03/13/1993
(2) -3.66 ft on 11/30/1963
(3) -3.29 ft on 12/21/1976
(4) -3.16 ft on 02/15/1953
(5) -3.16 ft on 02/19/1928
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
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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
12.52 Record tide level reached in association with Hurricane Hugo which made landfall at Sullivans Island, SC as a Category 4 hurricane at midnight September 22nd, 1989.
10.23 Peak tide level reached in association with an unnamed hurricane that made landfall near Hilton Head Island, SC as a Category 2 hurricane on August 11th, 1940.
9.92 Peak tide level reached in association with Tropical Storm Irma on September 11th, 2017.
9.29 Peak tide level reached in association with Hurricane Matthew which made landfall near McClellanville, SC as a Category 1 hurricane on October 8th, 2016.
8.64 Peak tide level reached in association with Hurricane David which made landfall near Sapelo Island, GA as a Category 1 hurricane on September 4th, 1979.
8.15 Peak tide level reached in association with an unnamed hurricane that made landfall near Ossabaw Island, GA as a Category 2 hurricane on October 15th, 1947.
8.14 Peak tide level reached in association with Hurricane Gracie which made landfall near Edisto Island, SC as a Category 4 hurricane on September 29th, 1959.
8 At 8.0 ft MLLW, major coastal flooding occurs. Widespread flooding occurs in Downtown Charleston with numerous roads flooded and impassable and some impact to structures. Impacts become more extensive all along the southeast South Carolina coast including erosion at area beaches, with limited or no access to docks, piers, and some islands.
7.5 At 7.5 ft MLLW, moderate coastal flooding occurs. In Downtown Charleston, additional impacted roads include HW-17 at HW-61, Market Street, East Bay, Rutledge, and areas around MUSC. Other impacted areas include Long Point Road near Palmetto Islands County Park, locations around the Naval Complex, 12th and 15th Streets on Isle of Palms, and the road leading to Bohicket Marina on Seabrook Island. In Beaufort County, flooding will impact Hunting Island and the Sea Island Parkway near Chowan Creek Bridge.
7 At 7.0 ft MLLW, minor coastal flooding typically begins. Minor flooding on roadways around Downtown Charleston occurs, possibly including Lockwood Drive, Wentworth and Barre, Fishburne and Hagood, and Morrison Drive. As the tide height approaches 7.5 ft MLLW, roads can become impassable and closed. Other impacts outside of Downtown Charleston include minor flooding of low-lying locations near area beaches including Isle of Palms, Sullivan's Island, Folly Beach, Kiawah Island, and Edisto Island.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
-1.5 At -1.5 ft MLLW, very low water levels will occur along the southeast South Carolina coast. This could cause navigation issues along the coast including tidal creeks, inlets, and in marsh areas. Also, areas that are normally under water could be exposed.
About This Location Collapse

Latitude: 32.780783° N, Longitude: 79.923609° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 7 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 -3.14 3.86 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 -2.16 4.84 Older USGS topographic maps, NGVD29 benchmarks
MSL -2.92 4.08 Older USGS topographic maps, MSL benchmarks
Other -5.76 1.24 Mean Higher High Water (MHHW), which is used as a proxy for inundation.
Additional Information Collapse
Gage data plotted here is referenced to Mean Lower Low Water (MLLW). Click here to view other datums as well as the astronomical tide predictions for Charleston Harbor. These predictions do not incorporate effects such as wind which can increase values by as much as 2 ft during non-tropical events.
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Hydrologic Resources Additional Resources
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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
National Weather Service
Charleston Weather Forecast Office
5777 South Aviation Avenue
North Charleston, SC 29406
(843) 747-5860
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