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Hydrograph River at a Glance Download
Tennessee River at Chattanooga Stage (ft)Observed: 635.76 ft at 1:00AM Oct 26, 2020Observed: 635.89 ft at 2:00AM Oct 26, 2020Observed: 635.76 ft at 3:00AM Oct 26, 2020Observed: 635.76 ft at 4:00AM Oct 26, 2020Observed: 635.63 ft at 5:00AM Oct 26, 2020Observed: 635.72 ft at 6:00AM Oct 26, 2020Observed: 635.63 ft at 7:00AM Oct 26, 2020Observed: 635.72 ft at 8:00AM Oct 26, 2020Observed: 635.68 ft at 9:00AM Oct 26, 2020Observed: 635.76 ft at 10:00AM Oct 26, 2020Observed: 635.83 ft at 11:00AM Oct 26, 2020Observed: 635.89 ft at 12:00PM Oct 26, 2020Observed: 635.86 ft at 1:00PM Oct 26, 2020Observed: 635.89 ft at 2:00PM Oct 26, 2020Observed: 635.91 ft at 3:00PM Oct 26, 2020Observed: 635.81 ft at 4:00PM Oct 26, 2020Observed: 635.94 ft at 5:00PM Oct 26, 2020Observed: 635.83 ft at 6:00PM Oct 26, 2020Observed: 635.81 ft at 7:00PM Oct 26, 2020Observed: 635.83 ft at 8:00PM Oct 26, 2020Observed: 635.76 ft at 9:00PM Oct 26, 2020Observed: 635.76 ft at 10:00PM Oct 26, 2020Observed: 635.77 ft at 11:00PM Oct 26, 2020Observed: 635.87 ft at 12:00AM Oct 27, 2020Observed: 635.72 ft at 1:00AM Oct 27, 2020Observed: 635.72 ft at 2:00AM Oct 27, 2020Observed: 635.55 ft at 3:00AM Oct 27, 2020Observed: 635.43 ft at 4:00AM Oct 27, 2020Observed: 635.33 ft at 5:00AM Oct 27, 2020Observed: 635.3 ft at 6:00AM Oct 27, 2020Observed: 635.22 ft at 7:00AM Oct 27, 2020Observed: 635.22 ft at 8:00AM Oct 27, 2020Observed: 635.23 ft at 9:00AM Oct 27, 2020Observed: 635.31 ft at 10:00AM Oct 27, 2020Observed: 635.75 ft at 11:00AM Oct 27, 2020Observed: 635.91 ft at 12:00PM Oct 27, 2020Observed: 636.21 ft at 1:00PM Oct 27, 2020Observed: 636.23 ft at 2:00PM Oct 27, 2020Observed: 636.21 ft at 3:00PM Oct 27, 2020Observed: 636.3 ft at 4:00PM Oct 27, 2020Observed: 636.34 ft at 5:00PM Oct 27, 2020Observed: 636.44 ft at 6:00PM Oct 27, 2020Observed: 636.49 ft at 7:00PM Oct 27, 2020Observed: 636.48 ft at 8:00PM Oct 27, 2020Observed: 636.55 ft at 9:00PM Oct 27, 2020Observed: 636.66 ft at 10:00PM Oct 27, 2020Observed: 636.55 ft at 11:00PM Oct 27, 2020Observed: 636.53 ft at 12:00AM Oct 28, 2020Observed: 636.57 ft at 1:00AM Oct 28, 2020Observed: 636.48 ft at 2:00AM Oct 28, 2020Observed: 636.49 ft at 3:00AM Oct 28, 2020Observed: 636.42 ft at 4:00AM Oct 28, 2020Observed: 636.37 ft at 5:00AM Oct 28, 2020Observed: 636.33 ft at 6:00AM Oct 28, 2020Observed: 636.21 ft at 7:00AM Oct 28, 2020Observed: 636.14 ft at 8:00AM Oct 28, 2020Observed: 636.09 ft at 9:00AM Oct 28, 2020Observed: 636.13 ft at 10:00AM Oct 28, 2020Observed: 636.13 ft at 11:00AM Oct 28, 2020Observed: 636.13 ft at 12:00PM Oct 28, 2020Observed: 636.14 ft at 1:00PM Oct 28, 2020Observed: 636.31 ft at 2:00PM Oct 28, 2020Observed: 636.66 ft at 3:00PM Oct 28, 2020Observed: 636.84 ft at 4:00PM Oct 28, 2020Observed: 637 ft at 5:00PM Oct 28, 2020Observed: 637.02 ft at 6:00PM Oct 28, 2020Observed: 637.1 ft at 7:00PM Oct 28, 2020Observed: 637.17 ft at 8:00PM Oct 28, 2020Observed: 637.23 ft at 9:00PM Oct 28, 2020Observed: 637.2 ft at 10:00PM Oct 28, 2020Observed: 637.22 ft at 11:00PM Oct 28, 2020Observed: 637.22 ft at 12:00AM Oct 29, 2020Observed: 637.21 ft at 1:00AM Oct 29, 2020Observed: 637.2 ft at 2:00AM Oct 29, 2020Observed: 637.24 ft at 3:00AM Oct 29, 2020Observed: 637.2 ft at 4:00AM Oct 29, 2020Observed: 637.35 ft at 5:00AM Oct 29, 2020Observed: 637.55 ft at 6:00AM Oct 29, 2020Observed: 637.74 ft at 7:00AM Oct 29, 2020Observed: 637.96 ft at 8:00AM Oct 29, 2020Observed: 637.92 ft at 9:00AM Oct 29, 2020Observed: 638.09 ft at 10:00AM Oct 29, 2020Observed: 638.08 ft at 11:00AM Oct 29, 2020Observed: 638.25 ft at 12:00PM Oct 29, 2020Observed: 638.3 ft at 1:00PM Oct 29, 2020Observed: 638.41 ft at 2:00PM Oct 29, 2020Observed: 638.51 ft at 3:00PM Oct 29, 2020Observed: 638.67 ft at 4:00PM Oct 29, 2020Observed: 638.79 ft at 5:00PM Oct 29, 2020Observed: 638.93 ft at 6:00PM Oct 29, 2020Observed: 639.04 ft at 7:00PM Oct 29, 2020Observed: 639.15 ft at 8:00PM Oct 29, 2020Observed: 639.21 ft at 9:00PM Oct 29, 2020Observed: 639.28 ft at 10:00PM Oct 29, 2020Observed: 639.35 ft at 11:00PM Oct 29, 2020Observed: 639.37 ft at 12:00AM Oct 30, 2020Observed: 639.37 ft at 1:00AM Oct 30, 2020Observed: 639.38 ft at 2:00AM Oct 30, 2020Observed: 639.36 ft at 3:00AM Oct 30, 2020Observed: 639.41 ft at 4:00AM Oct 30, 2020Observed: 639.37 ft at 5:00AM Oct 30, 2020Observed: 639.36 ft at 6:00AM Oct 30, 2020Observed: 639.37 ft at 7:00AM Oct 30, 2020Observed: 639.36 ft at 8:00AM Oct 30, 2020Observed: 639.36 ft at 9:00AM Oct 30, 2020Observed: 639.37 ft at 10:00AM Oct 30, 2020Observed: 639.43 ft at 11:00AM Oct 30, 2020Observed: 639.5 ft at 12:00PM Oct 30, 2020Observed: 639.49 ft at 1:00PM Oct 30, 2020Highest Observation: 639.56 ft at 2:00PM Oct 30, 2020Observed: 639.5 ft at 3:00PM Oct 30, 2020Observed: 639.44 ft at 4:00PM Oct 30, 2020Observed: 639.43 ft at 5:00PM Oct 30, 2020Observed: 639.37 ft at 6:00PM Oct 30, 2020Observed: 639.35 ft at 7:00PM Oct 30, 2020Observed: 639.28 ft at 8:00PM Oct 30, 2020Observed: 639.22 ft at 9:00PM Oct 30, 2020Observed: 639.2 ft at 10:00PM Oct 30, 2020Observed: 639.12 ft at 11:00PM Oct 30, 2020Highest Forecast: 639.04 ft 1:00AM Oct 31, 2020Forecast: 638.77 ft 7:00AM Oct 31, 2020Forecast: 638.76 ft 1:00PM Oct 31, 2020Forecast: 638.76 ft 7:00PM Oct 31, 2020Forecast: 638.8 ft 1:00AM Nov 01, 2020Forecast: 638.79 ft 6:00AM Nov 01, 2020Forecast: 638.74 ft 12:00PM Nov 01, 2020Forecast: 638.67 ft 6:00PM Nov 01, 2020Forecast: 638.6 ft 12:00AM Nov 02, 2020Forecast: 638.49 ft 6:00AM Nov 02, 2020Forecast: 638.39 ft 12:00PM Nov 02, 2020Forecast: 637.4 ft 6:00PM Nov 02, 2020CHAT1(plotting HGIRZ) Graph Created (12:45AM Oct 31, 2020)ObservedForecast (issued 11:38PM Oct 30)Latest observed value: 639.12 ft at 11:00 PM EDT 30-Oct-2020. Flood Stage is 651 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Tennessee River at Chattanooga are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Chickamauga Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Nickajack Dam (Jasper 5S)
Flood Categories (in feet)
Major Flood Stage: 655
Moderate Flood Stage: 653
Flood Stage: 651
Action Stage: 649
Low Stage (in feet): -9999

Historic Crests
(1) 678.90 ft on 03/11/1867
(2) 674.80 ft on 03/01/1875
(3) 659.98 ft on 03/18/1973
(4) 653.67 ft on 04/20/1998
(5) 651.36 ft on 07/08/2013
(6) 651.17 ft on 02/24/2019 (P)

(P): Preliminary values subject to further review.

Recent Crests
(1) 651.17 ft on 02/24/2019 (P)
(2) 651.36 ft on 07/08/2013
(3) 653.67 ft on 04/20/1998
(4) 659.98 ft on 03/18/1973
(5) 674.80 ft on 03/01/1875
(6) 678.90 ft on 03/11/1867

(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: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
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678.9 Flood of record, March 11, 1867.
655 Major flooding begins.
653 Moderate flooding begins.
651 Flooding begins.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
610 ft Municipal and industrial water intakes could experience operational issues below this elevation.
About This Location Collapse

Latitude: 35.056111° N, Longitude: 85.306389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 651 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 621 ft 651 ft  

Current/Historical Observations:

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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
Morristown Weather Forecast Office
5974 Commerce Blvd.
Morristown, TN 37814
(423) 586-3771
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Page last modified: 1-Mar-2019 12:35 AM
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