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Advanced Hydrologic Prediction Service
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ALERT: Update on status of the nationwide data transmission error that prevents stream gauge data collected at affected locations from being displayed on the Advanced Hydrologic Prediction Services (AHPS) webpages. The USGS has restored the transmission from all of their gauges or has placed them in a seasonal outage (some Alaska gauges). There are a few USGS gauges that the NWS is not yet receiving the new transmissions and NWS is working to get that data by alternate means. A map of the status of USGS gauges is here. The status map of gauge outages from other agencies is here. The situation has greatly improved and will continue to improve but at a slower pace. The outage maps will now be updated once per week on Thursday. We apologize for the service interruption and hope to have the data restored as soon as possible.



Hydrograph River at a Glance Download
Boston Harbor at Boston Tide Height (ft)Observed: 2.96 ft at 9:48AM Nov 12, 2018Observed: 3.1 ft at 9:54AM Nov 12, 2018Observed: 3.25 ft at 10:00AM Nov 12, 2018Observed: 3.42 ft at 10:06AM Nov 12, 2018Observed: 3.61 ft at 10:12AM Nov 12, 2018Observed: 3.79 ft at 10:18AM Nov 12, 2018Observed: 3.98 ft at 10:24AM Nov 12, 2018Observed: 4.13 ft at 10:30AM Nov 12, 2018Observed: 4.32 ft at 10:36AM Nov 12, 2018Observed: 4.51 ft at 10:42AM Nov 12, 2018Observed: 4.64 ft at 10:48AM Nov 12, 2018Observed: 4.82 ft at 10:54AM Nov 12, 2018Observed: 5.01 ft at 11:00AM Nov 12, 2018Observed: 5.21 ft at 11:06AM Nov 12, 2018Observed: 5.41 ft at 11:12AM Nov 12, 2018Observed: 5.63 ft at 11:18AM Nov 12, 2018Observed: 5.84 ft at 11:24AM Nov 12, 2018Observed: 6 ft at 11:30AM Nov 12, 2018Observed: 6.19 ft at 11:36AM Nov 12, 2018Observed: 6.39 ft at 11:42AM Nov 12, 2018Observed: 6.57 ft at 11:48AM Nov 12, 2018Observed: 6.74 ft at 11:54AM Nov 12, 2018Observed: 6.93 ft at 12:00PM Nov 12, 2018Observed: 7.08 ft at 12:06PM Nov 12, 2018Observed: 7.26 ft at 12:12PM Nov 12, 2018Observed: 7.45 ft at 12:18PM Nov 12, 2018Observed: 7.56 ft at 12:24PM Nov 12, 2018Observed: 7.76 ft at 12:30PM Nov 12, 2018Observed: 7.94 ft at 12:36PM Nov 12, 2018Observed: 8.1 ft at 12:42PM Nov 12, 2018Observed: 8.24 ft at 12:48PM Nov 12, 2018Observed: 8.39 ft at 12:54PM Nov 12, 2018Observed: 8.54 ft at 1:00PM Nov 12, 2018Observed: 8.62 ft at 1:06PM Nov 12, 2018Observed: 8.81 ft at 1:12PM Nov 12, 2018Observed: 8.93 ft at 1:18PM Nov 12, 2018Observed: 9.03 ft at 1:24PM Nov 12, 2018Observed: 9.1 ft at 1:30PM Nov 12, 2018Observed: 9.21 ft at 1:36PM Nov 12, 2018Observed: 9.28 ft at 1:42PM Nov 12, 2018Observed: 9.35 ft at 1:48PM Nov 12, 2018Observed: 9.39 ft at 1:54PM Nov 12, 2018Observed: 9.4 ft at 2:00PM Nov 12, 2018Observed: 9.42 ft at 2:06PM Nov 12, 2018Observed: 9.44 ft at 2:12PM Nov 12, 2018Observed: 9.46 ft at 2:18PM Nov 12, 2018Observed: 9.46 ft at 2:24PM Nov 12, 2018Observed: 9.46 ft at 2:30PM Nov 12, 2018Observed: 9.44 ft at 2:36PM Nov 12, 2018Observed: 9.42 ft at 2:42PM Nov 12, 2018Observed: 9.36 ft at 2:48PM Nov 12, 2018Observed: 9.27 ft at 2:54PM Nov 12, 2018Observed: 9.18 ft at 3:00PM Nov 12, 2018Observed: 9.07 ft at 3:06PM Nov 12, 2018Observed: 8.97 ft at 3:12PM Nov 12, 2018Observed: 8.86 ft at 3:18PM Nov 12, 2018Observed: 8.74 ft at 3:24PM Nov 12, 2018Observed: 8.59 ft at 3:30PM Nov 12, 2018Observed: 8.46 ft at 3:36PM Nov 12, 2018Observed: 8.32 ft at 3:42PM Nov 12, 2018Observed: 8.15 ft at 3:48PM Nov 12, 2018Observed: 7.96 ft at 3:54PM Nov 12, 2018Observed: 7.8 ft at 4:00PM Nov 12, 2018Observed: 7.63 ft at 4:06PM Nov 12, 2018Observed: 7.45 ft at 4:12PM Nov 12, 2018Observed: 7.32 ft at 4:18PM Nov 12, 2018Observed: 7.17 ft at 4:24PM Nov 12, 2018Observed: 7 ft at 4:30PM Nov 12, 2018Observed: 6.84 ft at 4:36PM Nov 12, 2018Observed: 6.66 ft at 4:42PM Nov 12, 2018Observed: 6.5 ft at 4:48PM Nov 12, 2018Observed: 6.33 ft at 4:54PM Nov 12, 2018Observed: 6.11 ft at 5:00PM Nov 12, 2018Observed: 5.89 ft at 5:06PM Nov 12, 2018Observed: 5.68 ft at 5:12PM Nov 12, 2018Observed: 5.46 ft at 5:18PM Nov 12, 2018Observed: 5.25 ft at 5:24PM Nov 12, 2018Observed: 5.05 ft at 5:30PM Nov 12, 2018Observed: 4.88 ft at 5:36PM Nov 12, 2018Observed: 4.67 ft at 5:42PM Nov 12, 2018Observed: 4.49 ft at 5:48PM Nov 12, 2018Observed: 4.3 ft at 5:54PM Nov 12, 2018Observed: 4.08 ft at 6:00PM Nov 12, 2018Observed: 3.9 ft at 6:06PM Nov 12, 2018Observed: 3.69 ft at 6:12PM Nov 12, 2018Observed: 3.48 ft at 6:18PM Nov 12, 2018Observed: 3.24 ft at 6:24PM Nov 12, 2018Observed: 3.05 ft at 6:30PM Nov 12, 2018Observed: 2.86 ft at 6:36PM Nov 12, 2018Observed: 2.7 ft at 6:42PM Nov 12, 2018Observed: 2.54 ft at 6:48PM Nov 12, 2018Observed: 2.19 ft at 7:00PM Nov 12, 2018Observed: 2.03 ft at 7:06PM Nov 12, 2018Observed: 1.87 ft at 7:12PM Nov 12, 2018Observed: 1.7 ft at 7:18PM Nov 12, 2018Observed: 1.55 ft at 7:24PM Nov 12, 2018Observed: 1.42 ft at 7:30PM Nov 12, 2018Observed: 1.3 ft at 7:36PM Nov 12, 2018Observed: 1.16 ft at 7:42PM Nov 12, 2018Observed: 1.08 ft at 7:48PM Nov 12, 2018Observed: 1.01 ft at 7:54PM Nov 12, 2018Observed: 0.93 ft at 8:00PM Nov 12, 2018Observed: 0.85 ft at 8:06PM Nov 12, 2018Observed: 0.8 ft at 8:12PM Nov 12, 2018Observed: 0.73 ft at 8:18PM Nov 12, 2018Observed: 0.67 ft at 8:24PM Nov 12, 2018Observed: 0.66 ft at 8:30PM Nov 12, 2018Observed: 0.62 ft at 8:36PM Nov 12, 2018Observed: 0.61 ft at 8:42PM Nov 12, 2018Observed: 0.66 ft at 8:48PM Nov 12, 2018Observed: 0.69 ft at 8:54PM Nov 12, 2018Observed: 0.73 ft at 9:00PM Nov 12, 2018Observed: 0.79 ft at 9:06PM Nov 12, 2018Observed: 0.88 ft at 9:12PM Nov 12, 2018Observed: 0.97 ft at 9:18PM Nov 12, 2018Observed: 1.06 ft at 9:24PM Nov 12, 2018Observed: 1.19 ft at 9:30PM Nov 12, 2018Observed: 1.29 ft at 9:36PM Nov 12, 2018Observed: 1.42 ft at 9:42PM Nov 12, 2018Observed: 1.55 ft at 9:48PM Nov 12, 2018Observed: 1.67 ft at 9:54PM Nov 12, 2018Observed: 1.77 ft at 10:00PM Nov 12, 2018Observed: 1.88 ft at 10:06PM Nov 12, 2018Observed: 2.03 ft at 10:12PM Nov 12, 2018Observed: 2.17 ft at 10:18PM Nov 12, 2018Observed: 2.32 ft at 10:24PM Nov 12, 2018Observed: 2.47 ft at 10:30PM Nov 12, 2018Observed: 2.62 ft at 10:36PM Nov 12, 2018Observed: 2.78 ft at 10:42PM Nov 12, 2018Observed: 2.95 ft at 10:48PM Nov 12, 2018Observed: 3.15 ft at 10:54PM Nov 12, 2018Observed: 3.33 ft at 11:00PM Nov 12, 2018Observed: 3.5 ft at 11:06PM Nov 12, 2018Observed: 3.68 ft at 11:12PM Nov 12, 2018Observed: 3.85 ft at 11:18PM Nov 12, 2018Observed: 4.04 ft at 11:24PM Nov 12, 2018Observed: 4.23 ft at 11:30PM Nov 12, 2018Observed: 4.4 ft at 11:36PM Nov 12, 2018Observed: 4.58 ft at 11:42PM Nov 12, 2018Observed: 4.78 ft at 11:48PM Nov 12, 2018Observed: 4.98 ft at 11:54PM Nov 12, 2018Observed: 5.17 ft at 12:00AM Nov 13, 2018Observed: 5.38 ft at 12:06AM Nov 13, 2018Observed: 5.59 ft at 12:12AM Nov 13, 2018Observed: 5.79 ft at 12:18AM Nov 13, 2018Observed: 6 ft at 12:24AM Nov 13, 2018Observed: 6.21 ft at 12:30AM Nov 13, 2018Observed: 6.44 ft at 12:36AM Nov 13, 2018Observed: 6.61 ft at 12:42AM Nov 13, 2018Observed: 6.81 ft at 12:48AM Nov 13, 2018Observed: 6.98 ft at 12:54AM Nov 13, 2018Observed: 7.17 ft at 1:00AM Nov 13, 2018Observed: 7.36 ft at 1:06AM Nov 13, 2018Observed: 7.52 ft at 1:12AM Nov 13, 2018Observed: 7.67 ft at 1:18AM Nov 13, 2018Observed: 7.81 ft at 1:24AM Nov 13, 2018Observed: 7.96 ft at 1:30AM Nov 13, 2018Observed: 8.1 ft at 1:36AM Nov 13, 2018Observed: 8.21 ft at 1:42AM Nov 13, 2018Observed: 8.35 ft at 1:48AM Nov 13, 2018Observed: 8.47 ft at 1:54AM Nov 13, 2018Observed: 8.55 ft at 2:00AM Nov 13, 2018Observed: 8.62 ft at 2:06AM Nov 13, 2018Observed: 8.68 ft at 2:12AM Nov 13, 2018Observed: 8.72 ft at 2:18AM Nov 13, 2018Observed: 8.76 ft at 2:24AM Nov 13, 2018Observed: 8.83 ft at 2:30AM Nov 13, 2018Observed: 8.84 ft at 2:36AM Nov 13, 2018Observed: 8.87 ft at 2:42AM Nov 13, 2018Observed: 8.91 ft at 2:48AM Nov 13, 2018Observed: 8.95 ft at 2:54AM Nov 13, 2018Observed: 8.97 ft at 3:00AM Nov 13, 2018Observed: 8.97 ft at 3:06AM Nov 13, 2018Observed: 8.93 ft at 3:12AM Nov 13, 2018Observed: 8.89 ft at 3:18AM Nov 13, 2018Observed: 8.84 ft at 3:24AM Nov 13, 2018Observed: 8.77 ft at 3:30AM Nov 13, 2018Observed: 8.7 ft at 3:36AM Nov 13, 2018Observed: 8.61 ft at 3:42AM Nov 13, 2018Observed: 8.53 ft at 3:48AM Nov 13, 2018Observed: 8.45 ft at 3:54AM Nov 13, 2018Observed: 8.38 ft at 4:00AM Nov 13, 2018Observed: 8.32 ft at 4:06AM Nov 13, 2018Observed: 8.25 ft at 4:12AM Nov 13, 2018Observed: 8.15 ft at 4:18AM Nov 13, 2018Observed: 8.04 ft at 4:24AM Nov 13, 2018Observed: 7.89 ft at 4:30AM Nov 13, 2018Observed: 7.77 ft at 4:36AM Nov 13, 2018Observed: 7.62 ft at 4:42AM Nov 13, 2018Observed: 7.46 ft at 4:48AM Nov 13, 2018Observed: 7.28 ft at 4:54AM Nov 13, 2018Observed: 7.12 ft at 5:00AM Nov 13, 2018Observed: 6.95 ft at 5:06AM Nov 13, 2018Observed: 6.82 ft at 5:12AM Nov 13, 2018Observed: 6.7 ft at 5:18AM Nov 13, 2018Observed: 6.56 ft at 5:24AM Nov 13, 2018Observed: 6.43 ft at 5:30AM Nov 13, 2018Observed: 6.32 ft at 5:36AM Nov 13, 2018Observed: 6.15 ft at 5:42AM Nov 13, 2018Observed: 5.99 ft at 5:48AM Nov 13, 2018Observed: 5.84 ft at 5:54AM Nov 13, 2018Observed: 5.63 ft at 6:00AM Nov 13, 2018Observed: 5.43 ft at 6:06AM Nov 13, 2018Observed: 5.22 ft at 6:12AM Nov 13, 2018Observed: 5.07 ft at 6:18AM Nov 13, 2018Observed: 4.89 ft at 6:24AM Nov 13, 2018Observed: 4.72 ft at 6:30AM Nov 13, 2018Observed: 4.57 ft at 6:36AM Nov 13, 2018Observed: 4.47 ft at 6:42AM Nov 13, 2018Observed: 4.31 ft at 6:48AM Nov 13, 2018Observed: 4.2 ft at 6:54AM Nov 13, 2018Observed: 4.06 ft at 7:00AM Nov 13, 2018Observed: 3.89 ft at 7:06AM Nov 13, 2018Observed: 3.73 ft at 7:12AM Nov 13, 2018Observed: 3.54 ft at 7:18AM Nov 13, 2018Observed: 3.41 ft at 7:24AM Nov 13, 2018Observed: 3.27 ft at 7:30AM Nov 13, 2018Observed: 3.11 ft at 7:36AM Nov 13, 2018Observed: 3.01 ft at 7:42AM Nov 13, 2018Observed: 2.83 ft at 7:48AM Nov 13, 2018Observed: 2.78 ft at 7:54AM Nov 13, 2018Observed: 2.64 ft at 8:00AM Nov 13, 2018Observed: 2.52 ft at 8:06AM Nov 13, 2018Observed: 2.4 ft at 8:12AM Nov 13, 2018Observed: 2.31 ft at 8:18AM Nov 13, 2018Observed: 2.27 ft at 8:24AM Nov 13, 2018Observed: 2.22 ft at 8:30AM Nov 13, 2018Observed: 2.22 ft at 8:36AM Nov 13, 2018Observed: 2.21 ft at 8:42AM Nov 13, 2018Observed: 2.22 ft at 8:48AM Nov 13, 2018Observed: 2.29 ft at 8:54AM Nov 13, 2018Observed: 2.34 ft at 9:00AM Nov 13, 2018Observed: 2.43 ft at 9:06AM Nov 13, 2018Observed: 2.47 ft at 9:12AM Nov 13, 2018Observed: 2.52 ft at 9:18AM Nov 13, 2018Observed: 2.6 ft at 9:24AM Nov 13, 2018Observed: 2.7 ft at 9:30AM Nov 13, 2018Observed: 2.91 ft at 9:36AM Nov 13, 2018Observed: 2.94 ft at 9:42AM Nov 13, 2018Observed: 3.05 ft at 9:48AM Nov 13, 2018Observed: 3.14 ft at 9:54AM Nov 13, 2018Observed: 3.3 ft at 10:00AM Nov 13, 2018Observed: 3.44 ft at 10:06AM Nov 13, 2018Observed: 3.47 ft at 10:12AM Nov 13, 2018Observed: 3.56 ft at 10:18AM Nov 13, 2018Observed: 3.69 ft at 10:24AM Nov 13, 2018Observed: 3.78 ft at 10:30AM Nov 13, 2018Observed: 3.91 ft at 10:36AM Nov 13, 2018Observed: 4.06 ft at 10:42AM Nov 13, 2018Observed: 4.25 ft at 10:48AM Nov 13, 2018Observed: 4.4 ft at 10:54AM Nov 13, 2018Observed: 4.62 ft at 11:00AM Nov 13, 2018Observed: 4.86 ft at 11:06AM Nov 13, 2018Observed: 5.1 ft at 11:12AM Nov 13, 2018Observed: 5.26 ft at 11:18AM Nov 13, 2018Observed: 5.46 ft at 11:24AM Nov 13, 2018Observed: 5.66 ft at 11:30AM Nov 13, 2018Observed: 5.83 ft at 11:36AM Nov 13, 2018Observed: 6.02 ft at 11:42AM Nov 13, 2018Observed: 6.21 ft at 11:48AM Nov 13, 2018Observed: 6.34 ft at 11:54AM Nov 13, 2018Observed: 6.48 ft at 12:00PM Nov 13, 2018Observed: 6.65 ft at 12:06PM Nov 13, 2018Observed: 6.85 ft at 12:12PM Nov 13, 2018Observed: 7 ft at 12:18PM Nov 13, 2018Observed: 7.2 ft at 12:24PM Nov 13, 2018Observed: 7.39 ft at 12:30PM Nov 13, 2018Observed: 7.58 ft at 12:36PM Nov 13, 2018Observed: 7.81 ft at 12:42PM Nov 13, 2018Observed: 8.03 ft at 12:48PM Nov 13, 2018Observed: 8.28 ft at 12:54PM Nov 13, 2018Observed: 8.48 ft at 1:00PM Nov 13, 2018Observed: 8.65 ft at 1:06PM Nov 13, 2018Observed: 8.8 ft at 1:12PM Nov 13, 2018Observed: 8.94 ft at 1:18PM Nov 13, 2018Observed: 9.07 ft at 1:24PM Nov 13, 2018Observed: 9.23 ft at 1:30PM Nov 13, 2018Observed: 9.36 ft at 1:36PM Nov 13, 2018Observed: 9.48 ft at 1:42PM Nov 13, 2018Observed: 9.55 ft at 1:48PM Nov 13, 2018Observed: 9.67 ft at 1:54PM Nov 13, 2018Observed: 9.77 ft at 2:00PM Nov 13, 2018Observed: 9.9 ft at 2:06PM Nov 13, 2018Observed: 10 ft at 2:12PM Nov 13, 2018Observed: 10.08 ft at 2:18PM Nov 13, 2018Observed: 10.1 ft at 2:24PM Nov 13, 2018Observed: 10.22 ft at 2:30PM Nov 13, 2018Observed: 10.31 ft at 2:36PM Nov 13, 2018Observed: 10.38 ft at 2:42PM Nov 13, 2018Observed: 10.42 ft at 2:48PM Nov 13, 2018Highest Observation: 10.44 ft at 2:54PM Nov 13, 2018Observed: 10.4 ft at 3:00PM Nov 13, 2018Observed: 10.36 ft at 3:06PM Nov 13, 2018Observed: 10.32 ft at 3:12PM Nov 13, 2018Observed: 10.29 ft at 3:18PM Nov 13, 2018Observed: 10.25 ft at 3:24PM Nov 13, 2018Observed: 10.19 ft at 3:30PM Nov 13, 2018Observed: 10.14 ft at 3:36PM Nov 13, 2018Observed: 10.1 ft at 3:42PM Nov 13, 2018Observed: 10.1 ft at 3:48PM Nov 13, 2018Observed: 10.02 ft at 3:54PM Nov 13, 2018Observed: 9.91 ft at 4:00PM Nov 13, 2018Observed: 9.77 ft at 4:06PM Nov 13, 2018Observed: 9.6 ft at 4:12PM Nov 13, 2018Observed: 9.4 ft at 4:18PM Nov 13, 2018Observed: 9.21 ft at 4:24PM Nov 13, 2018Observed: 9.05 ft at 4:30PM Nov 13, 2018Observed: 8.91 ft at 4:36PM Nov 13, 2018Observed: 8.74 ft at 4:42PM Nov 13, 2018Observed: 8.59 ft at 4:48PM Nov 13, 2018Observed: 8.5 ft at 4:54PM Nov 13, 2018Observed: 8.35 ft at 5:00PM Nov 13, 2018Observed: 8.22 ft at 5:06PM Nov 13, 2018Observed: 8.09 ft at 5:12PM Nov 13, 2018Observed: 7.91 ft at 5:18PM Nov 13, 2018Observed: 7.74 ft at 5:24PM Nov 13, 2018Observed: 7.6 ft at 5:30PM Nov 13, 2018Observed: 7.41 ft at 5:36PM Nov 13, 2018Observed: 7.25 ft at 5:42PM Nov 13, 2018Observed: 7.15 ft at 5:48PM Nov 13, 2018Observed: 6.97 ft at 5:54PM Nov 13, 2018Observed: 6.77 ft at 6:00PM Nov 13, 2018Observed: 6.6 ft at 6:06PM Nov 13, 2018Observed: 6.39 ft at 6:12PM Nov 13, 2018Observed: 6.19 ft at 6:18PM Nov 13, 2018Observed: 5.94 ft at 6:24PM Nov 13, 2018Observed: 5.66 ft at 6:30PM Nov 13, 2018Observed: 5.4 ft at 6:36PM Nov 13, 2018Observed: 5.15 ft at 6:42PM Nov 13, 2018Observed: 4.89 ft at 6:48PM Nov 13, 2018Observed: 4.45 ft at 7:00PM Nov 13, 2018Observed: 4.22 ft at 7:06PM Nov 13, 2018Observed: 4.02 ft at 7:12PM Nov 13, 2018Observed: 3.82 ft at 7:18PM Nov 13, 2018Observed: 3.6 ft at 7:24PM Nov 13, 2018Observed: 3.37 ft at 7:30PM Nov 13, 2018Observed: 3.19 ft at 7:36PM Nov 13, 2018Observed: 3 ft at 7:42PM Nov 13, 2018Observed: 2.75 ft at 7:48PM Nov 13, 2018Observed: 2.57 ft at 7:54PM Nov 13, 2018Observed: 2.43 ft at 8:00PM Nov 13, 2018Observed: 2.25 ft at 8:06PM Nov 13, 2018Observed: 2.1 ft at 8:12PM Nov 13, 2018Observed: 1.94 ft at 8:18PM Nov 13, 2018Observed: 1.8 ft at 8:24PM Nov 13, 2018Observed: 1.7 ft at 8:30PM Nov 13, 2018Observed: 1.57 ft at 8:36PM Nov 13, 2018Observed: 1.47 ft at 8:42PM Nov 13, 2018Observed: 1.38 ft at 8:48PM Nov 13, 2018Observed: 1.32 ft at 8:54PM Nov 13, 2018Observed: 1.23 ft at 9:00PM Nov 13, 2018Observed: 1.14 ft at 9:06PM Nov 13, 2018Observed: 1.06 ft at 9:12PM Nov 13, 2018Observed: 0.96 ft at 9:18PM Nov 13, 2018Observed: 0.86 ft at 9:24PM Nov 13, 2018Observed: 0.83 ft at 9:30PM Nov 13, 2018Observed: 0.85 ft at 9:36PM Nov 13, 2018Observed: 0.87 ft at 9:42PM Nov 13, 2018Observed: 0.87 ft at 9:48PM Nov 13, 2018Observed: 0.88 ft at 9:54PM Nov 13, 2018Observed: 0.96 ft at 10:00PM Nov 13, 2018Observed: 1.07 ft at 10:06PM Nov 13, 2018Observed: 1.15 ft at 10:12PM Nov 13, 2018Observed: 1.21 ft at 10:18PM Nov 13, 2018Observed: 1.37 ft at 10:24PM Nov 13, 2018Observed: 1.51 ft at 10:30PM Nov 13, 2018Observed: 1.67 ft at 10:36PM Nov 13, 2018Observed: 1.8 ft at 10:42PM Nov 13, 2018Observed: 1.97 ft at 10:48PM Nov 13, 2018Observed: 2.1 ft at 10:54PM Nov 13, 2018Observed: 2.17 ft at 11:00PM Nov 13, 2018Observed: 2.25 ft at 11:06PM Nov 13, 2018Observed: 2.32 ft at 11:12PM Nov 13, 2018Observed: 2.38 ft at 11:18PM Nov 13, 2018Observed: 2.42 ft at 11:24PM Nov 13, 2018Observed: 2.44 ft at 11:30PM Nov 13, 2018Observed: 2.53 ft at 11:36PM Nov 13, 2018Observed: 2.65 ft at 11:42PM Nov 13, 2018Observed: 2.81 ft at 11:48PM Nov 13, 2018Observed: 2.99 ft at 11:54PM Nov 13, 2018Observed: 3.16 ft at 12:00AM Nov 14, 2018Observed: 3.38 ft at 12:06AM Nov 14, 2018Observed: 3.59 ft at 12:12AM Nov 14, 2018Observed: 3.81 ft at 12:18AM Nov 14, 2018Observed: 3.97 ft at 12:24AM Nov 14, 2018Observed: 4.12 ft at 12:30AM Nov 14, 2018Observed: 4.27 ft at 12:36AM Nov 14, 2018Observed: 4.41 ft at 12:42AM Nov 14, 2018Observed: 4.56 ft at 12:48AM Nov 14, 2018Observed: 4.72 ft at 12:54AM Nov 14, 2018Observed: 4.87 ft at 1:00AM Nov 14, 2018Observed: 5.03 ft at 1:06AM Nov 14, 2018Observed: 5.21 ft at 1:12AM Nov 14, 2018Observed: 5.41 ft at 1:18AM Nov 14, 2018Observed: 5.63 ft at 1:24AM Nov 14, 2018Observed: 5.86 ft at 1:30AM Nov 14, 2018Observed: 6.04 ft at 1:36AM Nov 14, 2018Observed: 6.17 ft at 1:42AM Nov 14, 2018Observed: 6.28 ft at 1:48AM Nov 14, 2018Observed: 6.41 ft at 1:54AM Nov 14, 2018Observed: 6.49 ft at 2:00AM Nov 14, 2018Observed: 6.55 ft at 2:06AM Nov 14, 2018Observed: 6.58 ft at 2:12AM Nov 14, 2018Observed: 6.59 ft at 2:18AM Nov 14, 2018Observed: 6.68 ft at 2:24AM Nov 14, 2018Observed: 6.86 ft at 2:30AM Nov 14, 2018Observed: 6.99 ft at 2:36AM Nov 14, 2018Observed: 7.11 ft at 2:42AM Nov 14, 2018Observed: 7.27 ft at 2:48AM Nov 14, 2018Observed: 7.4 ft at 2:54AM Nov 14, 2018Observed: 7.49 ft at 3:00AM Nov 14, 2018Observed: 7.63 ft at 3:06AM Nov 14, 2018Observed: 7.73 ft at 3:12AM Nov 14, 2018Observed: 7.76 ft at 3:18AM Nov 14, 2018Observed: 7.81 ft at 3:24AM Nov 14, 2018Observed: 7.88 ft at 3:30AM Nov 14, 2018Observed: 7.93 ft at 3:36AM Nov 14, 2018Observed: 7.96 ft at 3:42AM Nov 14, 2018Observed: 8 ft at 3:48AM Nov 14, 2018Observed: 7.99 ft at 3:54AM Nov 14, 2018Observed: 8.01 ft at 4:00AM Nov 14, 2018Observed: 7.98 ft at 4:06AM Nov 14, 2018Observed: 7.96 ft at 4:12AM Nov 14, 2018Observed: 7.9 ft at 4:18AM Nov 14, 2018Observed: 7.81 ft at 4:24AM Nov 14, 2018Observed: 7.72 ft at 4:30AM Nov 14, 2018Observed: 7.67 ft at 4:36AM Nov 14, 2018Observed: 7.59 ft at 4:42AM Nov 14, 2018Observed: 7.51 ft at 4:48AM Nov 14, 2018Observed: 7.41 ft at 4:54AM Nov 14, 2018Observed: 7.29 ft at 5:00AM Nov 14, 2018Observed: 7.2 ft at 5:06AM Nov 14, 2018Observed: 7.08 ft at 5:12AM Nov 14, 2018Observed: 6.91 ft at 5:18AM Nov 14, 2018Observed: 6.77 ft at 5:24AM Nov 14, 2018Observed: 6.61 ft at 5:30AM Nov 14, 2018Observed: 6.46 ft at 5:36AM Nov 14, 2018Observed: 6.29 ft at 5:42AM Nov 14, 2018Observed: 6.14 ft at 5:48AM Nov 14, 2018Observed: 6.02 ft at 5:54AM Nov 14, 2018Observed: 5.94 ft at 6:00AM Nov 14, 2018Observed: 5.83 ft at 6:06AM Nov 14, 2018Observed: 5.73 ft at 6:12AM Nov 14, 2018Observed: 5.66 ft at 6:18AM Nov 14, 2018Observed: 5.52 ft at 6:24AM Nov 14, 2018Observed: 5.4 ft at 6:30AM Nov 14, 2018Observed: 5.25 ft at 6:36AM Nov 14, 2018Observed: 5.11 ft at 6:42AM Nov 14, 2018Observed: 4.91 ft at 6:48AM Nov 14, 2018Observed: 4.74 ft at 6:54AM Nov 14, 2018Observed: 4.57 ft at 7:00AM Nov 14, 2018Observed: 4.42 ft at 7:06AM Nov 14, 2018Observed: 4.22 ft at 7:12AM Nov 14, 2018Observed: 4.01 ft at 7:18AM Nov 14, 2018Observed: 3.81 ft at 7:24AM Nov 14, 2018Observed: 3.58 ft at 7:30AM Nov 14, 2018Observed: 3.31 ft at 7:36AM Nov 14, 2018Observed: 3.07 ft at 7:42AM Nov 14, 2018Observed: 2.91 ft at 7:48AM Nov 14, 2018Observed: 2.67 ft at 7:54AM Nov 14, 2018Observed: 2.48 ft at 8:00AM Nov 14, 2018Observed: 2.32 ft at 8:06AM Nov 14, 2018Observed: 2.14 ft at 8:12AM Nov 14, 2018Observed: 1.97 ft at 8:18AM Nov 14, 2018Observed: 1.8 ft at 8:24AM Nov 14, 2018Observed: 1.65 ft at 8:30AM Nov 14, 2018Observed: 1.51 ft at 8:36AM Nov 14, 2018Observed: 1.39 ft at 8:42AM Nov 14, 2018Observed: 1.26 ft at 8:48AM Nov 14, 2018Observed: 1.15 ft at 8:54AM Nov 14, 2018Observed: 1.06 ft at 9:00AM Nov 14, 2018Observed: 0.96 ft at 9:06AM Nov 14, 2018Observed: 0.91 ft at 9:12AM Nov 14, 2018Observed: 0.82 ft at 9:18AM Nov 14, 2018Observed: 0.79 ft at 9:24AM Nov 14, 2018Observed: 0.78 ft at 9:30AM Nov 14, 2018Observed: 0.68 ft at 9:36AM Nov 14, 2018Observed: 0.67 ft at 9:42AM Nov 14, 2018Observed: 0.71 ft at 9:48AM Nov 14, 2018Observed: 0.7 ft at 9:54AM Nov 14, 2018Observed: 0.69 ft at 10:00AM Nov 14, 2018Observed: 0.66 ft at 10:06AM Nov 14, 2018Observed: 0.7 ft at 10:12AM Nov 14, 2018Observed: 0.77 ft at 10:18AM Nov 14, 2018Observed: 0.91 ft at 10:24AM Nov 14, 2018Observed: 0.99 ft at 10:30AM Nov 14, 2018Observed: 1.11 ft at 10:36AM Nov 14, 2018Observed: 1.3 ft at 10:42AM Nov 14, 2018Observed: 1.5 ft at 10:48AM Nov 14, 2018Observed: 1.84 ft at 11:00AM Nov 14, 2018Observed: 1.99 ft at 11:06AM Nov 14, 2018Observed: 2.09 ft at 11:12AM Nov 14, 2018Observed: 2.19 ft at 11:18AM Nov 14, 2018Observed: 2.29 ft at 11:24AM Nov 14, 2018Observed: 2.37 ft at 11:30AM Nov 14, 2018Observed: 2.45 ft at 11:36AM Nov 14, 2018Observed: 2.5 ft at 11:42AM Nov 14, 2018Observed: 2.6 ft at 11:48AM Nov 14, 2018Observed: 2.7 ft at 11:54AM Nov 14, 2018Observed: 2.81 ft at 12:00PM Nov 14, 2018Observed: 2.9 ft at 12:06PM Nov 14, 2018Observed: 3.04 ft at 12:12PM Nov 14, 2018Observed: 3.2 ft at 12:18PM Nov 14, 2018Observed: 3.28 ft at 12:24PM Nov 14, 2018Observed: 3.42 ft at 12:30PM Nov 14, 2018Observed: 3.55 ft at 12:36PM Nov 14, 2018Observed: 3.74 ft at 12:42PM Nov 14, 2018Observed: 3.86 ft at 12:48PM Nov 14, 2018Observed: 4.04 ft at 12:54PM Nov 14, 2018Observed: 4.21 ft at 1:00PM Nov 14, 2018Observed: 4.34 ft at 1:06PM Nov 14, 2018Observed: 4.49 ft at 1:12PM Nov 14, 2018Observed: 4.63 ft at 1:18PM Nov 14, 2018Observed: 4.78 ft at 1:24PM Nov 14, 2018Observed: 4.9 ft at 1:30PM Nov 14, 2018Observed: 5.06 ft at 1:36PM Nov 14, 2018Observed: 5.19 ft at 1:42PM Nov 14, 2018Observed: 5.36 ft at 1:48PM Nov 14, 2018Observed: 5.5 ft at 1:54PM Nov 14, 2018Observed: 5.64 ft at 2:00PM Nov 14, 2018Observed: 5.75 ft at 2:06PM Nov 14, 2018Observed: 5.91 ft at 2:12PM Nov 14, 2018Observed: 6.08 ft at 2:18PM Nov 14, 2018Observed: 6.19 ft at 2:24PM Nov 14, 2018Observed: 6.34 ft at 2:30PM Nov 14, 2018Observed: 6.45 ft at 2:36PM Nov 14, 2018Observed: 6.56 ft at 2:42PM Nov 14, 2018Observed: 6.72 ft at 2:48PM Nov 14, 2018Observed: 6.81 ft at 2:54PM Nov 14, 2018Observed: 6.92 ft at 3:00PM Nov 14, 2018Observed: 7 ft at 3:06PM Nov 14, 2018Observed: 7.03 ft at 3:12PM Nov 14, 2018Observed: 7.08 ft at 3:18PM Nov 14, 2018Observed: 7.12 ft at 3:24PM Nov 14, 2018Observed: 7.15 ft at 3:30PM Nov 14, 2018Observed: 7.19 ft at 3:36PM Nov 14, 2018Observed: 7.2 ft at 3:42PM Nov 14, 2018Observed: 7.2 ft at 3:48PM Nov 14, 2018Observed: 7.25 ft at 3:54PM Nov 14, 2018Observed: 7.27 ft at 4:00PM Nov 14, 2018Observed: 7.28 ft at 4:06PM Nov 14, 2018Observed: 7.3 ft at 4:12PM Nov 14, 2018Observed: 7.28 ft at 4:18PM Nov 14, 2018Observed: 7.25 ft at 4:24PM Nov 14, 2018Observed: 7.2 ft at 4:30PM Nov 14, 2018Observed: 7.14 ft at 4:36PM Nov 14, 2018Observed: 7.08 ft at 4:42PM Nov 14, 2018Observed: 6.99 ft at 4:48PM Nov 14, 2018Observed: 6.88 ft at 4:54PM Nov 14, 2018Observed: 6.81 ft at 5:00PM Nov 14, 2018Observed: 6.75 ft at 5:06PM Nov 14, 2018Observed: 6.64 ft at 5:12PM Nov 14, 2018Observed: 6.56 ft at 5:18PM Nov 14, 2018Observed: 6.5 ft at 5:24PM Nov 14, 2018Observed: 6.38 ft at 5:30PM Nov 14, 2018Observed: 6.25 ft at 5:36PM Nov 14, 2018Observed: 6.15 ft at 5:42PM Nov 14, 2018Observed: 6 ft at 5:48PM Nov 14, 2018Observed: 5.86 ft at 5:54PM Nov 14, 2018Observed: 5.73 ft at 6:00PM Nov 14, 2018Observed: 5.56 ft at 6:06PM Nov 14, 2018Observed: 5.41 ft at 6:12PM Nov 14, 2018Observed: 5.27 ft at 6:18PM Nov 14, 2018Observed: 5.09 ft at 6:24PM Nov 14, 2018Observed: 4.96 ft at 6:30PM Nov 14, 2018Observed: 4.8 ft at 6:36PM Nov 14, 2018Observed: 4.62 ft at 6:42PM Nov 14, 2018Observed: 4.5 ft at 6:48PM Nov 14, 2018Forecast: 3.7 ft 8:00PM Nov 14, 2018Forecast: 2 ft 9:00PM Nov 14, 2018Forecast: 1.1 ft 10:00PM Nov 14, 2018Forecast: 1.4 ft 11:00PM Nov 14, 2018Forecast: 2.5 ft 12:00AM Nov 15, 2018Forecast: 3.9 ft 1:00AM Nov 15, 2018Forecast: 5.5 ft 2:00AM Nov 15, 2018Forecast: 7.2 ft 3:00AM Nov 15, 2018Forecast: 8.2 ft 4:00AM Nov 15, 2018Forecast: 8.4 ft 5:00AM Nov 15, 2018Forecast: 7.5 ft 6:00AM Nov 15, 2018Forecast: 6.3 ft 7:00AM Nov 15, 2018Forecast: 4.8 ft 8:00AM Nov 15, 2018Forecast: 3.3 ft 9:00AM Nov 15, 2018Forecast: 2.2 ft 10:00AM Nov 15, 2018Forecast: 2.1 ft 11:00AM Nov 15, 2018Forecast: 3.1 ft 12:00PM Nov 15, 2018Forecast: 4.4 ft 1:00PM Nov 15, 2018Forecast: 5.8 ft 2:00PM Nov 15, 2018Forecast: 7.4 ft 3:00PM Nov 15, 2018Forecast: 8.6 ft 4:00PM Nov 15, 2018Forecast: 8.8 ft 5:00PM Nov 15, 2018Forecast: 8.1 ft 6:00PM Nov 15, 2018Forecast: 6.8 ft 7:00PM Nov 15, 2018Forecast: 5.2 ft 8:00PM Nov 15, 2018Forecast: 3.5 ft 9:00PM Nov 15, 2018Forecast: 2 ft 10:00PM Nov 15, 2018Forecast: 1.3 ft 11:00PM Nov 15, 2018Forecast: 1.7 ft 12:00AM Nov 16, 2018Forecast: 2.8 ft 1:00AM Nov 16, 2018Forecast: 4.1 ft 2:00AM Nov 16, 2018Forecast: 5.9 ft 3:00AM Nov 16, 2018Forecast: 7.6 ft 4:00AM Nov 16, 2018Forecast: 8.8 ft 5:00AM Nov 16, 2018Highest Forecast: 8.9 ft 6:00AM Nov 16, 2018Forecast: 8.3 ft 7:00AM Nov 16, 2018Forecast: 7.2 ft 8:00AM Nov 16, 2018Forecast: 5.7 ft 9:00AM Nov 16, 2018Forecast: 4.1 ft 10:00AM Nov 16, 2018Forecast: 3 ft 11:00AM Nov 16, 2018Forecast: 2.9 ft 12:00PM Nov 16, 2018Forecast: 3.8 ft 1:00PM Nov 16, 2018Forecast: 5.1 ft 2:00PM Nov 16, 2018Forecast: 6.5 ft 3:00PM Nov 16, 2018Forecast: 8 ft 4:00PM Nov 16, 2018Highest Forecast: 8.9 ft 5:00PM Nov 16, 2018Highest Forecast: 8.9 ft 6:00PM Nov 16, 2018Forecast: 8.1 ft 7:00PM Nov 16, 2018Forecast: 6.7 ft 8:00PM Nov 16, 2018Forecast: 5.1 ft 9:00PM Nov 16, 2018Forecast: 3.4 ft 10:00PM Nov 16, 2018Forecast: 1.9 ft 11:00PM Nov 16, 2018Forecast: 1.3 ft 12:00AM Nov 17, 2018Forecast: 1.8 ft 1:00AM Nov 17, 2018Forecast: 3 ft 2:00AM Nov 17, 2018Forecast: 4.4 ft 3:00AM Nov 17, 2018Forecast: 6.1 ft 4:00AM Nov 17, 2018Forecast: 7.7 ft 5:00AM Nov 17, 2018Forecast: 8.6 ft 6:00AM Nov 17, 2018Forecast: 8.4 ft 7:00AM Nov 17, 2018Forecast: 7.5 ft 8:00AM Nov 17, 2018Forecast: 6.1 ft 9:00AM Nov 17, 2018Forecast: 4.5 ft 10:00AM Nov 17, 2018Forecast: 2.9 ft 11:00AM Nov 17, 2018Forecast: 1.8 ft 12:00PM Nov 17, 2018Forecast: 2 ft 1:00PM Nov 17, 2018Forecast: 3 ft 2:00PM Nov 17, 2018Forecast: 4.3 ft 3:00PM Nov 17, 2018NOAA Center for Operational Oceanographic Products and ServicesBHBM3(plotting HMIRG) Graph Created (7:15PM Nov 14, 2018)ObservedForecast (issued 4:18PM Nov 14)Latest observed value: 4.5 ft at 6:48 PM EST 14-Nov-2018. Flood Stage is 12.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Coastal flood impacts are dependent upon waves as well as tide level. High waves can result in flooding even if the tide level is below flood stage.

NOTE: Forecasts for the Boston Harbor at Boston are issued routinely year-round.

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

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Flood Categories (in feet)
Major Flood Stage: 16
Moderate Flood Stage: 14.5
Flood Stage: 12.5
Action Stage: 11.5
Low Stage (in feet): -9999

Historic Crests
(1) 15.16 ft on 01/04/2018
(2) 15.10 ft on 02/07/1978
(3) 14.67 ft on 03/02/2018
(4) 14.20 ft on 01/02/1987
(5) 14.14 ft on 10/30/1991
(6) 14.04 ft on 01/24/1979
(7) 14.03 ft on 12/12/1992
(8) 13.87 ft on 03/03/2018
(9) 13.84 ft on 12/29/1959
(10) 13.84 ft on 01/03/2014
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.54 ft on 09/10/2018
(2) 13.87 ft on 03/03/2018
(3) 14.67 ft on 03/02/2018
(4) 13.24 ft on 01/30/2018
(5) 15.16 ft on 01/04/2018
(6) 13.10 ft on 05/28/2017
(7) 13.41 ft on 05/26/2017
(8) 13.62 ft on 01/27/2015
(9) 13.84 ft on 01/03/2014
(10) 13.58 ft on 06/05/2012
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

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
16 This is a degree of flooding rarely seen. Major widespread coastal flooding is expected. Numerous homes and roadways will be flooded from Revere and Winthrop southward thru Hull, including major flooding within the Boston Seaport District. Impacts will occur during several hours before and after high tide. People living in vulnerable coastal areas must take action to protect life and property.
14.5 Significant flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. This includes significant flooding within the Seaport District of Boston. Numerous homes will be flooded. Road closures and evacuations of coastal sections are likely. Large swells and wave action will produce significant beach erosion.
14 Flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. Road closures and some evacuations of coastal sections may be required. Large swells and wave action will produce minor to moderate beach erosion.
13.5 Minor flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. The combination of high tides and large swells will result in washover onto coastal roadways and some road closures may occur around the time of high tide.
12.5 Minor coastal flooding occurs along Morrissey Boulevard in Boston.
Photos
(1) Boston Harbor Tidal Station
About This Location Collapse

Latitude: 42.353900° N, Longitude: 71.050300° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 12.5 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 -5.51 6.99 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 -5.21 7.29 Older USGS topographic maps, MSL benchmarks
Other Not Available 12.5 MLLW (Mean Lower Low Water)
Additional Information Collapse
**Coastal flooding can occur at a stage of 12 feet, when onshore winds are present along with 20 foot seas.** Boston Harbor gage data and forecasts are in feet Mean Lower Low Water (MLLW).
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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
Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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Page last modified: 21-Dec-2016 5:21 PM
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