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Hydrograph River at a Glance Download
Nantucket Harbor at Nantucket Tide Height (ft)Observed: 2.02 ft at 8:00PM Feb 25, 2015Observed: 1.94 ft at 8:06PM Feb 25, 2015Observed: 1.86 ft at 8:12PM Feb 25, 2015Observed: 1.57 ft at 8:36PM Feb 25, 2015Observed: 1.51 ft at 8:42PM Feb 25, 2015Observed: 1.45 ft at 8:48PM Feb 25, 2015Observed: 1.38 ft at 8:54PM Feb 25, 2015Observed: 1.32 ft at 9:00PM Feb 25, 2015Observed: 1.24 ft at 9:06PM Feb 25, 2015Observed: 1.16 ft at 9:12PM Feb 25, 2015Observed: 1.08 ft at 9:18PM Feb 25, 2015Observed: 1.01 ft at 9:24PM Feb 25, 2015Observed: 0.94 ft at 9:30PM Feb 25, 2015Observed: 0.87 ft at 9:36PM Feb 25, 2015Observed: 0.81 ft at 9:42PM Feb 25, 2015Observed: 0.74 ft at 9:48PM Feb 25, 2015Observed: 0.65 ft at 9:54PM Feb 25, 2015Observed: 0.58 ft at 10:00PM Feb 25, 2015Observed: 0.52 ft at 10:06PM Feb 25, 2015Observed: 0.28 ft at 10:30PM Feb 25, 2015Observed: 0.24 ft at 10:36PM Feb 25, 2015Observed: 0.17 ft at 10:42PM Feb 25, 2015Observed: 0.06 ft at 11:00PM Feb 25, 2015Observed: -0.03 ft at 11:18PM Feb 25, 2015Observed: -0.04 ft at 11:24PM Feb 25, 2015Observed: -0.02 ft at 11:30PM Feb 25, 2015Observed: -0.01 ft at 11:36PM Feb 25, 2015Observed: 0.01 ft at 11:42PM Feb 25, 2015Observed: 0.02 ft at 11:48PM Feb 25, 2015Observed: 0.05 ft at 11:54PM Feb 25, 2015Observed: 0.07 ft at 12:00AM Feb 26, 2015Observed: 0.08 ft at 12:06AM Feb 26, 2015Observed: 0.1 ft at 12:12AM Feb 26, 2015Observed: 0.15 ft at 12:18AM Feb 26, 2015Observed: 0.18 ft at 12:24AM Feb 26, 2015Observed: 0.21 ft at 12:30AM Feb 26, 2015Observed: 0.26 ft at 12:36AM Feb 26, 2015Observed: 0.3 ft at 12:42AM Feb 26, 2015Observed: 0.35 ft at 12:48AM Feb 26, 2015Observed: 0.41 ft at 12:54AM Feb 26, 2015Observed: 0.57 ft at 1:12AM Feb 26, 2015Observed: 0.63 ft at 1:18AM Feb 26, 2015Observed: 0.87 ft at 1:42AM Feb 26, 2015Observed: 0.93 ft at 1:48AM Feb 26, 2015Observed: 0.99 ft at 1:54AM Feb 26, 2015Observed: 1.05 ft at 2:00AM Feb 26, 2015Observed: 1.13 ft at 2:06AM Feb 26, 2015Observed: 1.2 ft at 2:12AM Feb 26, 2015Observed: 1.29 ft at 2:18AM Feb 26, 2015Observed: 1.42 ft at 2:24AM Feb 26, 2015Observed: 1.53 ft at 2:30AM Feb 26, 2015Observed: 1.59 ft at 2:36AM Feb 26, 2015Observed: 1.66 ft at 2:42AM Feb 26, 2015Observed: 1.72 ft at 2:48AM Feb 26, 2015Observed: 1.77 ft at 2:54AM Feb 26, 2015Observed: 1.8 ft at 3:00AM Feb 26, 2015Observed: 1.87 ft at 3:06AM Feb 26, 2015Observed: 1.95 ft at 3:12AM Feb 26, 2015Observed: 2.04 ft at 3:18AM Feb 26, 2015Observed: 2.12 ft at 3:24AM Feb 26, 2015Observed: 2.2 ft at 3:30AM Feb 26, 2015Observed: 2.3 ft at 3:36AM Feb 26, 2015Observed: 2.38 ft at 3:42AM Feb 26, 2015Observed: 2.45 ft at 3:48AM Feb 26, 2015Observed: 2.52 ft at 3:54AM Feb 26, 2015Observed: 2.6 ft at 4:00AM Feb 26, 2015Observed: 2.69 ft at 4:06AM Feb 26, 2015Observed: 2.76 ft at 4:12AM Feb 26, 2015Observed: 2.81 ft at 4:18AM Feb 26, 2015Observed: 2.86 ft at 4:24AM Feb 26, 2015Observed: 2.94 ft at 4:30AM Feb 26, 2015Observed: 3.01 ft at 4:36AM Feb 26, 2015Observed: 3.06 ft at 4:42AM Feb 26, 2015Observed: 3.13 ft at 4:48AM Feb 26, 2015Observed: 3.18 ft at 4:54AM Feb 26, 2015Observed: 3.22 ft at 5:00AM Feb 26, 2015Observed: 3.22 ft at 5:06AM Feb 26, 2015Observed: 3.23 ft at 5:12AM Feb 26, 2015Observed: 3.27 ft at 5:18AM Feb 26, 2015Observed: 3.34 ft at 5:24AM Feb 26, 2015Observed: 3.38 ft at 5:30AM Feb 26, 2015Observed: 3.43 ft at 5:36AM Feb 26, 2015Observed: 3.45 ft at 5:42AM Feb 26, 2015Observed: 3.45 ft at 5:48AM Feb 26, 2015Highest Observation: 3.49 ft at 5:54AM Feb 26, 2015Highest Observation: 3.49 ft at 6:00AM Feb 26, 2015Highest Observation: 3.49 ft at 6:06AM Feb 26, 2015Highest Observation: 3.49 ft at 6:12AM Feb 26, 2015Highest Observation: 3.49 ft at 6:18AM Feb 26, 2015Highest Observation: 3.49 ft at 6:24AM Feb 26, 2015Observed: 3.48 ft at 6:30AM Feb 26, 2015Observed: 3.48 ft at 6:36AM Feb 26, 2015Observed: 3.47 ft at 6:42AM Feb 26, 2015Observed: 3.46 ft at 6:48AM Feb 26, 2015Observed: 3.46 ft at 6:54AM Feb 26, 2015Observed: 3.45 ft at 7:00AM Feb 26, 2015Observed: 3.45 ft at 7:06AM Feb 26, 2015Observed: 3.45 ft at 7:12AM Feb 26, 2015Observed: 3.44 ft at 7:18AM Feb 26, 2015Observed: 3.45 ft at 7:24AM Feb 26, 2015Observed: 3.45 ft at 7:30AM Feb 26, 2015Observed: 3.44 ft at 7:36AM Feb 26, 2015Observed: 3.44 ft at 7:42AM Feb 26, 2015Observed: 3.44 ft at 7:48AM Feb 26, 2015Observed: 3.44 ft at 7:54AM Feb 26, 2015Observed: 2.51 ft at 8:24PM Feb 27, 2015Observed: 2.5 ft at 8:30PM Feb 27, 2015Observed: 2.48 ft at 8:36PM Feb 27, 2015Observed: 2.44 ft at 8:42PM Feb 27, 2015Observed: 2.51 ft at 9:00PM Feb 27, 2015Observed: 2.51 ft at 9:06PM Feb 27, 2015Observed: 2.51 ft at 9:12PM Feb 27, 2015Observed: 2.51 ft at 9:18PM Feb 27, 2015Observed: 2.51 ft at 9:24PM Feb 27, 2015Observed: 2.51 ft at 9:30PM Feb 27, 2015Observed: 2.51 ft at 9:36PM Feb 27, 2015Observed: 2.51 ft at 9:42PM Feb 27, 2015Observed: 2.51 ft at 9:48PM Feb 27, 2015Observed: 2.51 ft at 9:54PM Feb 27, 2015Observed: 2.51 ft at 10:00PM Feb 27, 2015Observed: 2.51 ft at 10:06PM Feb 27, 2015Observed: 2.51 ft at 10:12PM Feb 27, 2015Observed: 2.51 ft at 10:18PM Feb 27, 2015Forecast: 2.5 ft 9:00AM Feb 28, 2015Forecast: 2 ft 10:00AM Feb 28, 2015Forecast: 1.3 ft 11:00AM Feb 28, 2015Forecast: 0.5 ft 12:00PM Feb 28, 2015Forecast: -0.1 ft 1:00PM Feb 28, 2015Forecast: -0.4 ft 2:00PM Feb 28, 2015Forecast: -0.3 ft 3:00PM Feb 28, 2015Forecast: 0 ft 4:00PM Feb 28, 2015Forecast: 0.5 ft 5:00PM Feb 28, 2015Forecast: 1.1 ft 6:00PM Feb 28, 2015Forecast: 1.7 ft 7:00PM Feb 28, 2015Forecast: 2 ft 8:00PM Feb 28, 2015Forecast: 2.1 ft 9:00PM Feb 28, 2015Forecast: 1.9 ft 10:00PM Feb 28, 2015Forecast: 1.4 ft 11:00PM Feb 28, 2015Forecast: 0.8 ft 12:00AM Mar 01, 2015Forecast: 0.1 ft 1:00AM Mar 01, 2015Forecast: -0.2 ft 2:00AM Mar 01, 2015Forecast: -0.1 ft 3:00AM Mar 01, 2015Forecast: 0.2 ft 4:00AM Mar 01, 2015Forecast: 0.7 ft 5:00AM Mar 01, 2015Forecast: 1.3 ft 6:00AM Mar 01, 2015Forecast: 2 ft 7:00AM Mar 01, 2015Forecast: 2.4 ft 8:00AM Mar 01, 2015Forecast: 2.6 ft 9:00AM Mar 01, 2015Forecast: 2.4 ft 10:00AM Mar 01, 2015Forecast: 2 ft 11:00AM Mar 01, 2015Forecast: 1.3 ft 12:00PM Mar 01, 2015Forecast: 0.6 ft 1:00PM Mar 01, 2015Forecast: -0.1 ft 2:00PM Mar 01, 2015Forecast: -0.3 ft 3:00PM Mar 01, 2015Forecast: -0.2 ft 4:00PM Mar 01, 2015Forecast: 0.1 ft 5:00PM Mar 01, 2015Forecast: 0.6 ft 6:00PM Mar 01, 2015Forecast: 1.3 ft 7:00PM Mar 01, 2015Forecast: 1.8 ft 8:00PM Mar 01, 2015Forecast: 2.2 ft 9:00PM Mar 01, 2015Forecast: 2.3 ft 10:00PM Mar 01, 2015Forecast: 2.1 ft 11:00PM Mar 01, 2015Forecast: 1.6 ft 12:00AM Mar 02, 2015Forecast: 1 ft 1:00AM Mar 02, 2015Forecast: 0.4 ft 2:00AM Mar 02, 2015Forecast: 0.1 ft 3:00AM Mar 02, 2015Forecast: 0.3 ft 4:00AM Mar 02, 2015Forecast: 0.6 ft 5:00AM Mar 02, 2015Forecast: 1.3 ft 6:00AM Mar 02, 2015Forecast: 1.9 ft 7:00AM Mar 02, 2015Forecast: 2.5 ft 8:00AM Mar 02, 2015Forecast: 2.8 ft 9:00AM Mar 02, 2015Highest Forecast: 3 ft 10:00AM Mar 02, 2015Forecast: 2.8 ft 11:00AM Mar 02, 2015Forecast: 2.2 ft 12:00PM Mar 02, 2015Forecast: 1.3 ft 1:00PM Mar 02, 2015Forecast: 0.5 ft 2:00PM Mar 02, 2015Forecast: -0.2 ft 3:00PM Mar 02, 2015Forecast: -0.3 ft 4:00PM Mar 02, 2015Forecast: -0.3 ft 5:00PM Mar 02, 2015Forecast: 0.1 ft 6:00PM Mar 02, 2015Forecast: 0.7 ft 7:00PM Mar 02, 2015Forecast: 1.3 ft 8:00PM Mar 02, 2015Forecast: 1.8 ft 9:00PM Mar 02, 2015Forecast: 2.2 ft 10:00PM Mar 02, 2015Forecast: 2.2 ft 11:00PM Mar 02, 2015Forecast: 1.9 ft 12:00AM Mar 03, 2015Forecast: 1.5 ft 1:00AM Mar 03, 2015Forecast: 0.7 ft 2:00AM Mar 03, 2015Forecast: 0.1 ft 3:00AM Mar 03, 2015Data courtesy of NOAA National Ocean ServiceNTKM3(plotting HMIRG) Graph Created (8:46AM Feb 28, 2015)ObservedForecast (issued 4:19AM Feb 28)Latest observed value: 2.51 ft at 10:18 PM EST 27-Feb-2015. Flood Stage is 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: Gauge reading may be affected by ice.

Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.

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

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

Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 8
Moderate Flood Stage: 6
Flood Stage: 5
Action Stage: 4
Low Stage (in feet): 0

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
10 Signifcant flooding is expected in low lying portions of Nantucket. Road closures and some evacuations can be expected. Large surf will also result in beach erosion in vulnerable areas.
8 Flooding of low lying areas on Nantucket is likely. Flooding will impact both the Nantucket Harbor region as well as the Atlantic Avenue area on the south side of the Island. Some localized evacuations may be necessary.
6 Moderate flooding of Nantucket Harbor is expected. Some low lying coastal roads will experience during the time nearest high tide.
4.5 Minor coastal flooding begins on Easy Street in Nantucket.
Photos
(1) Nantucket Tidal Station
About This Location Collapse

Latitude: 41.285000° N, Longitude: 70.096667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available 6 MLLW
Additional Information Collapse
Nantucket Harbor gage data and forecasts are in feet Mean Lower Low Water (MLLW).
Resources Collapse
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 Weather Forecast Office
445 Myles Standish Blvd
Taunton, MA 02780
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Page last modified: 12-Feb-2015 9:36 PM
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