Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip
    
Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
     Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

Web Portal Changes:

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
Green River (KY) near Mammoth Cave Stage (ft)Observed: 10.66 ft at 9:15PM Apr 28, 2024Observed: 10.66 ft at 9:30PM Apr 28, 2024Observed: 10.65 ft at 9:45PM Apr 28, 2024Observed: 10.65 ft at 10:00PM Apr 28, 2024Observed: 10.65 ft at 10:15PM Apr 28, 2024Observed: 10.65 ft at 10:30PM Apr 28, 2024Observed: 10.64 ft at 10:45PM Apr 28, 2024Observed: 10.64 ft at 11:00PM Apr 28, 2024Observed: 10.64 ft at 11:15PM Apr 28, 2024Observed: 10.64 ft at 11:30PM Apr 28, 2024Observed: 10.65 ft at 11:45PM Apr 28, 2024Observed: 10.73 ft at 12:00AM Apr 29, 2024Observed: 10.63 ft at 12:15AM Apr 29, 2024Observed: 10.63 ft at 12:30AM Apr 29, 2024Observed: 10.63 ft at 12:45AM Apr 29, 2024Observed: 10.62 ft at 1:00AM Apr 29, 2024Observed: 10.62 ft at 1:15AM Apr 29, 2024Observed: 10.67 ft at 1:30AM Apr 29, 2024Observed: 10.61 ft at 1:45AM Apr 29, 2024Observed: 10.62 ft at 2:00AM Apr 29, 2024Observed: 10.61 ft at 2:15AM Apr 29, 2024Observed: 10.61 ft at 2:30AM Apr 29, 2024Observed: 10.61 ft at 2:45AM Apr 29, 2024Observed: 10.61 ft at 3:00AM Apr 29, 2024Observed: 10.61 ft at 3:15AM Apr 29, 2024Observed: 10.61 ft at 3:30AM Apr 29, 2024Observed: 10.6 ft at 3:45AM Apr 29, 2024Observed: 10.62 ft at 4:00AM Apr 29, 2024Observed: 10.6 ft at 4:15AM Apr 29, 2024Observed: 11.03 ft at 4:30AM Apr 29, 2024Observed: 10.59 ft at 4:45AM Apr 29, 2024Observed: 10.68 ft at 5:00AM Apr 29, 2024Observed: 10.59 ft at 5:15AM Apr 29, 2024Observed: 10.89 ft at 5:30AM Apr 29, 2024Observed: 10.59 ft at 5:45AM Apr 29, 2024Observed: 10.59 ft at 6:00AM Apr 29, 2024Observed: 10.59 ft at 6:15AM Apr 29, 2024Observed: 10.58 ft at 6:30AM Apr 29, 2024Observed: 10.58 ft at 6:45AM Apr 29, 2024Observed: 10.57 ft at 7:00AM Apr 29, 2024Observed: 10.58 ft at 7:15AM Apr 29, 2024Observed: 10.58 ft at 7:30AM Apr 29, 2024Observed: 10.58 ft at 7:45AM Apr 29, 2024Observed: 10.58 ft at 8:00AM Apr 29, 2024Observed: 10.58 ft at 8:15AM Apr 29, 2024Observed: 10.58 ft at 8:30AM Apr 29, 2024Observed: 10.57 ft at 8:45AM Apr 29, 2024Observed: 10.57 ft at 9:00AM Apr 29, 2024Observed: 10.61 ft at 9:15AM Apr 29, 2024Observed: 10.57 ft at 9:30AM Apr 29, 2024Observed: 10.57 ft at 9:45AM Apr 29, 2024Observed: 10.64 ft at 10:00AM Apr 29, 2024Observed: 10.62 ft at 10:15AM Apr 29, 2024Observed: 10.57 ft at 10:30AM Apr 29, 2024Observed: 10.62 ft at 10:45AM Apr 29, 2024Observed: 10.56 ft at 11:00AM Apr 29, 2024Observed: 10.58 ft at 11:15AM Apr 29, 2024Observed: 10.86 ft at 11:30AM Apr 29, 2024Observed: 10.82 ft at 11:45AM Apr 29, 2024Observed: 10.82 ft at 12:00PM Apr 29, 2024Observed: 10.83 ft at 12:15PM Apr 29, 2024Observed: 10.83 ft at 12:30PM Apr 29, 2024Observed: 10.83 ft at 12:45PM Apr 29, 2024Observed: 10.84 ft at 1:00PM Apr 29, 2024Observed: 10.85 ft at 1:15PM Apr 29, 2024Observed: 10.85 ft at 1:30PM Apr 29, 2024Observed: 10.85 ft at 1:45PM Apr 29, 2024Observed: 10.86 ft at 2:00PM Apr 29, 2024Observed: 10.84 ft at 2:15PM Apr 29, 2024Observed: 10.83 ft at 2:30PM Apr 29, 2024Observed: 10.83 ft at 2:45PM Apr 29, 2024Observed: 10.82 ft at 3:00PM Apr 29, 2024Observed: 10.82 ft at 3:15PM Apr 29, 2024Observed: 10.82 ft at 3:30PM Apr 29, 2024Observed: 10.81 ft at 3:45PM Apr 29, 2024Observed: 10.83 ft at 4:00PM Apr 29, 2024Observed: 10.78 ft at 4:15PM Apr 29, 2024Observed: 10.78 ft at 4:30PM Apr 29, 2024Observed: 10.78 ft at 4:45PM Apr 29, 2024Observed: 10.78 ft at 5:00PM Apr 29, 2024Observed: 10.78 ft at 5:15PM Apr 29, 2024Observed: 10.77 ft at 5:30PM Apr 29, 2024Observed: 10.77 ft at 5:45PM Apr 29, 2024Observed: 10.77 ft at 6:00PM Apr 29, 2024Observed: 10.77 ft at 6:15PM Apr 29, 2024Observed: 10.77 ft at 6:30PM Apr 29, 2024Observed: 10.76 ft at 6:45PM Apr 29, 2024Observed: 10.77 ft at 7:00PM Apr 29, 2024Observed: 10.76 ft at 7:15PM Apr 29, 2024Observed: 10.77 ft at 7:30PM Apr 29, 2024Observed: 10.76 ft at 7:45PM Apr 29, 2024Observed: 10.75 ft at 8:00PM Apr 29, 2024Observed: 10.76 ft at 8:15PM Apr 29, 2024Observed: 10.76 ft at 8:30PM Apr 29, 2024Observed: 10.75 ft at 8:45PM Apr 29, 2024Observed: 10.75 ft at 9:00PM Apr 29, 2024Observed: 10.75 ft at 9:15PM Apr 29, 2024Observed: 10.74 ft at 9:30PM Apr 29, 2024Observed: 10.75 ft at 9:45PM Apr 29, 2024Observed: 10.76 ft at 10:00PM Apr 29, 2024Observed: 10.78 ft at 10:15PM Apr 29, 2024Observed: 10.79 ft at 10:30PM Apr 29, 2024Observed: 10.81 ft at 10:45PM Apr 29, 2024Observed: 10.83 ft at 11:00PM Apr 29, 2024Observed: 10.85 ft at 11:15PM Apr 29, 2024Observed: 10.84 ft at 11:30PM Apr 29, 2024Observed: 10.85 ft at 11:45PM Apr 29, 2024Observed: 10.86 ft at 12:00AM Apr 30, 2024Observed: 10.86 ft at 12:15AM Apr 30, 2024Observed: 10.87 ft at 12:30AM Apr 30, 2024Observed: 10.88 ft at 12:45AM Apr 30, 2024Observed: 10.88 ft at 1:00AM Apr 30, 2024Observed: 10.91 ft at 1:15AM Apr 30, 2024Observed: 10.92 ft at 1:30AM Apr 30, 2024Observed: 10.93 ft at 1:45AM Apr 30, 2024Observed: 10.93 ft at 2:00AM Apr 30, 2024Observed: 10.95 ft at 2:15AM Apr 30, 2024Observed: 10.94 ft at 2:30AM Apr 30, 2024Observed: 10.93 ft at 2:45AM Apr 30, 2024Observed: 10.95 ft at 3:00AM Apr 30, 2024Observed: 10.96 ft at 3:15AM Apr 30, 2024Observed: 10.99 ft at 3:30AM Apr 30, 2024Observed: 11.01 ft at 3:45AM Apr 30, 2024Observed: 11.02 ft at 4:00AM Apr 30, 2024Observed: 11.06 ft at 4:15AM Apr 30, 2024Observed: 11.08 ft at 4:30AM Apr 30, 2024Observed: 11.13 ft at 4:45AM Apr 30, 2024Observed: 11.15 ft at 5:00AM Apr 30, 2024Observed: 11.18 ft at 5:15AM Apr 30, 2024Observed: 11.22 ft at 5:30AM Apr 30, 2024Observed: 11.25 ft at 5:45AM Apr 30, 2024Observed: 11.28 ft at 6:00AM Apr 30, 2024Observed: 11.32 ft at 6:15AM Apr 30, 2024Observed: 11.36 ft at 6:30AM Apr 30, 2024Observed: 11.39 ft at 6:45AM Apr 30, 2024Observed: 11.43 ft at 7:00AM Apr 30, 2024Observed: 11.48 ft at 7:15AM Apr 30, 2024Observed: 11.51 ft at 7:30AM Apr 30, 2024Observed: 11.56 ft at 7:45AM Apr 30, 2024Observed: 11.63 ft at 8:00AM Apr 30, 2024Observed: 11.66 ft at 8:15AM Apr 30, 2024Observed: 11.71 ft at 8:30AM Apr 30, 2024Observed: 11.75 ft at 8:45AM Apr 30, 2024Observed: 11.79 ft at 9:00AM Apr 30, 2024Observed: 11.82 ft at 9:15AM Apr 30, 2024Observed: 11.86 ft at 9:30AM Apr 30, 2024Observed: 11.9 ft at 9:45AM Apr 30, 2024Observed: 11.94 ft at 10:00AM Apr 30, 2024Observed: 11.96 ft at 10:15AM Apr 30, 2024Observed: 12 ft at 10:30AM Apr 30, 2024Observed: 12.02 ft at 10:45AM Apr 30, 2024Observed: 12.05 ft at 11:00AM Apr 30, 2024Observed: 11.8 ft at 11:15AM Apr 30, 2024Observed: 11.82 ft at 11:30AM Apr 30, 2024Observed: 11.83 ft at 11:45AM Apr 30, 2024Observed: 11.92 ft at 12:00PM Apr 30, 2024Observed: 12 ft at 12:15PM Apr 30, 2024Observed: 11.88 ft at 12:30PM Apr 30, 2024Observed: 11.92 ft at 12:45PM Apr 30, 2024Observed: 11.91 ft at 1:00PM Apr 30, 2024Observed: 11.94 ft at 2:15PM Apr 30, 2024Observed: 11.94 ft at 2:30PM Apr 30, 2024Observed: 11.97 ft at 2:45PM Apr 30, 2024Observed: 11.97 ft at 3:00PM Apr 30, 2024Observed: 11.98 ft at 3:15PM Apr 30, 2024Observed: 11.98 ft at 3:30PM Apr 30, 2024Observed: 11.99 ft at 3:45PM Apr 30, 2024Observed: 11.99 ft at 4:00PM Apr 30, 2024Observed: 12 ft at 4:15PM Apr 30, 2024Observed: 12.01 ft at 4:30PM Apr 30, 2024Observed: 12.01 ft at 4:45PM Apr 30, 2024Observed: 12 ft at 5:00PM Apr 30, 2024Observed: 12.01 ft at 5:15PM Apr 30, 2024Observed: 12.01 ft at 5:30PM Apr 30, 2024Observed: 12 ft at 5:45PM Apr 30, 2024Observed: 12.01 ft at 6:00PM Apr 30, 2024Observed: 11.99 ft at 6:15PM Apr 30, 2024Observed: 11.99 ft at 6:30PM Apr 30, 2024Observed: 11.98 ft at 6:45PM Apr 30, 2024Observed: 11.98 ft at 7:00PM Apr 30, 2024Observed: 11.98 ft at 7:15PM Apr 30, 2024Observed: 11.98 ft at 7:30PM Apr 30, 2024Observed: 11.97 ft at 7:45PM Apr 30, 2024Observed: 11.96 ft at 8:00PM Apr 30, 2024Observed: 11.96 ft at 8:15PM Apr 30, 2024Observed: 11.95 ft at 8:30PM Apr 30, 2024Observed: 11.94 ft at 8:45PM Apr 30, 2024Observed: 11.94 ft at 9:00PM Apr 30, 2024Observed: 11.93 ft at 9:15PM Apr 30, 2024Observed: 11.93 ft at 9:30PM Apr 30, 2024Observed: 11.93 ft at 9:45PM Apr 30, 2024Observed: 11.91 ft at 10:00PM Apr 30, 2024Observed: 11.91 ft at 10:15PM Apr 30, 2024Observed: 11.91 ft at 10:30PM Apr 30, 2024Observed: 11.9 ft at 10:45PM Apr 30, 2024Observed: 11.9 ft at 11:00PM Apr 30, 2024Observed: 11.89 ft at 11:15PM Apr 30, 2024Observed: 11.89 ft at 11:30PM Apr 30, 2024Observed: 11.89 ft at 11:45PM Apr 30, 2024Observed: 11.89 ft at 12:00AM May 01, 2024Observed: 11.89 ft at 12:15AM May 01, 2024Observed: 11.89 ft at 12:30AM May 01, 2024Observed: 11.89 ft at 12:45AM May 01, 2024Observed: 11.89 ft at 1:00AM May 01, 2024Observed: 11.89 ft at 1:15AM May 01, 2024Observed: 11.89 ft at 1:30AM May 01, 2024Observed: 11.89 ft at 1:45AM May 01, 2024Observed: 11.9 ft at 2:00AM May 01, 2024Observed: 11.9 ft at 2:15AM May 01, 2024Observed: 11.91 ft at 2:30AM May 01, 2024Observed: 11.91 ft at 2:45AM May 01, 2024Observed: 11.92 ft at 3:00AM May 01, 2024Observed: 11.92 ft at 3:15AM May 01, 2024Observed: 11.93 ft at 3:30AM May 01, 2024Observed: 11.94 ft at 3:45AM May 01, 2024Observed: 11.95 ft at 4:00AM May 01, 2024Observed: 11.96 ft at 4:15AM May 01, 2024Observed: 11.97 ft at 4:30AM May 01, 2024Observed: 11.98 ft at 4:45AM May 01, 2024Observed: 11.99 ft at 5:00AM May 01, 2024Observed: 12 ft at 5:15AM May 01, 2024Observed: 12.02 ft at 5:30AM May 01, 2024Observed: 12.04 ft at 5:45AM May 01, 2024Observed: 12.06 ft at 6:00AM May 01, 2024Observed: 12.06 ft at 6:15AM May 01, 2024Observed: 12.07 ft at 6:30AM May 01, 2024Observed: 12.09 ft at 6:45AM May 01, 2024Observed: 12.12 ft at 7:00AM May 01, 2024Observed: 12.14 ft at 7:15AM May 01, 2024Observed: 12.17 ft at 7:30AM May 01, 2024Observed: 12.19 ft at 7:45AM May 01, 2024Observed: 12.23 ft at 8:00AM May 01, 2024Observed: 12.25 ft at 8:15AM May 01, 2024Observed: 12.29 ft at 8:30AM May 01, 2024Observed: 12.34 ft at 8:45AM May 01, 2024Observed: 12.37 ft at 9:00AM May 01, 2024Observed: 12.42 ft at 9:15AM May 01, 2024Observed: 12.48 ft at 9:30AM May 01, 2024Observed: 12.52 ft at 9:45AM May 01, 2024Observed: 12.56 ft at 10:00AM May 01, 2024Observed: 12.62 ft at 10:15AM May 01, 2024Observed: 12.67 ft at 10:30AM May 01, 2024Observed: 12.74 ft at 10:45AM May 01, 2024Observed: 12.8 ft at 11:00AM May 01, 2024Observed: 12.87 ft at 11:15AM May 01, 2024Observed: 12.92 ft at 11:30AM May 01, 2024Observed: 12.99 ft at 11:45AM May 01, 2024Observed: 13.05 ft at 12:00PM May 01, 2024Observed: 13.11 ft at 12:15PM May 01, 2024Observed: 13.17 ft at 12:30PM May 01, 2024Observed: 13.23 ft at 12:45PM May 01, 2024Observed: 13.29 ft at 1:00PM May 01, 2024Observed: 13.35 ft at 1:15PM May 01, 2024Observed: 13.4 ft at 1:30PM May 01, 2024Observed: 13.45 ft at 1:45PM May 01, 2024Observed: 13.5 ft at 2:00PM May 01, 2024Observed: 13.55 ft at 2:15PM May 01, 2024Observed: 13.62 ft at 2:30PM May 01, 2024Observed: 13.65 ft at 2:45PM May 01, 2024Observed: 13.69 ft at 3:00PM May 01, 2024Observed: 13.74 ft at 3:15PM May 01, 2024Observed: 13.77 ft at 3:30PM May 01, 2024Observed: 13.81 ft at 3:45PM May 01, 2024Observed: 13.85 ft at 4:00PM May 01, 2024Observed: 13.89 ft at 4:15PM May 01, 2024Observed: 13.91 ft at 4:30PM May 01, 2024Observed: 13.94 ft at 4:45PM May 01, 2024Observed: 13.96 ft at 5:00PM May 01, 2024Observed: 14 ft at 5:15PM May 01, 2024Observed: 14.01 ft at 5:30PM May 01, 2024Observed: 14.04 ft at 5:45PM May 01, 2024Observed: 14.06 ft at 6:00PM May 01, 2024Observed: 14.08 ft at 6:15PM May 01, 2024Observed: 14.1 ft at 6:30PM May 01, 2024Observed: 14.11 ft at 6:45PM May 01, 2024Observed: 14.13 ft at 7:00PM May 01, 2024Observed: 14.14 ft at 7:15PM May 01, 2024Observed: 14.16 ft at 7:30PM May 01, 2024Observed: 14.17 ft at 7:45PM May 01, 2024Highest Observation: 14.18 ft at 8:00PM May 01, 2024Forecast: 14.8 ft 1:00AM May 02, 2024Highest Forecast: 15.2 ft 7:00AM May 02, 2024Highest Forecast: 15.2 ft 1:00PM May 02, 2024Forecast: 15 ft 7:00PM May 02, 2024Forecast: 14.6 ft 1:00AM May 03, 2024Forecast: 14.2 ft 7:00AM May 03, 2024Forecast: 13.6 ft 1:00PM May 03, 2024Forecast: 13.1 ft 7:00PM May 03, 2024Forecast: 12.7 ft 1:00AM May 04, 2024Forecast: 12.4 ft 7:00AM May 04, 2024Forecast: 12.2 ft 1:00PM May 04, 2024Forecast: 12 ft 7:00PM May 04, 2024USGS--Water Resources of the United StatesMMCK2(plotting HGIRG) Graph Created (9:10PM May 1, 2024)ObservedForecast (issued 9:31AM May 1)Latest observed value: 14.18 ft at 8:00 PM CDT 1-May-2024. Flood Stage is 32 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Green River (KY) near Mammoth Cave are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Munfordville Upstream Gauge Downstream Gauge Downstream Gauge - near Brownsville
Flood Categories (in feet)
Major Flood Stage: 62
Moderate Flood Stage: 57
Flood Stage: 32
Action Stage: 20
Low Stage (in feet): -9999

Historic Crests
(1) 52.00 ft on 01/24/1937
(2) 50.94 ft on 03/03/2021
(3) 50.50 ft on 01/01/1913
(4) 43.00 ft on 02/18/1949
(5) 42.62 ft on 02/26/2019
(6) 42.60 ft on 01/01/1935
(7) 42.00 ft on 01/09/1950
(8) 38.10 ft on 04/16/1948
(9) 38.04 ft on 12/19/2019
(10) 34.60 ft on 01/04/1945
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 50.94 ft on 03/03/2021
(2) 38.04 ft on 12/19/2019
(3) 42.62 ft on 02/26/2019
(4) 34.60 ft on 02/12/2018
(5) 42.00 ft on 01/09/1950
(6) 43.00 ft on 02/18/1949
(7) 38.10 ft on 04/16/1948
(8) 34.60 ft on 01/04/1945
(9) 31.70 ft on 02/06/1939
(10) 52.00 ft on 01/24/1937
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
57 Cave tours that use the lower levels of the cave are closed.
42 Echo River Spring Trail and parking lot are under water and not accessible.
32 Green River Ferry closes to all traffic due to high water.
20.1 Launching of paddle craft is prohibited.
20 Green River Ferry closes to RV and trailer traffic due to high water. Heavy loads will be at the judgment of the ferry operator considering the 12 ton load limit of ferry. Backcountry camping on the Green River floodplain is prohibited.
Photos
(1) Green River Ferry at Mammoth Cave
(2) North Ferry Approach
(3) South Ferry Approach
(4) Downstream Staff Gauge
(5) Upstream Boat Ramp
(6) Upstream Staff Gauges
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
10.5 Green River Ferry closes to RV/Trailer traffic and heavy loads due to low water.
9.5 Green River Ferry is closed to all traffic due to low water.
About This Location Collapse

Latitude: 37.180000° N, Longitude: 86.112500° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 32 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 409.35 441.35 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 Not Available  

Current/Historical Observations:
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) River Forecast VS. River Potential
HEFS Ensemble NAEFS Ensemble River Forecast vs Potential

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

USGS Average Streamflow Duration Hydrograph
How low could the river get?
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
Louisville Weather Forecast Office
6201 Theiler Lane
Louisville, KY 40229
(502) 969-8842
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:30 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities