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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
Flint River (GA) at Lake Blackshear Pool (ft)Highest Observation: 234.5 ft at 7:00AM Nov 06, 2018Highest Observation: 234.5 ft at 8:00AM Nov 06, 2018Observed: 233.97 ft at 7:00AM Nov 07, 2018Observed: 233.97 ft at 8:00AM Nov 07, 2018Observed: 233.61 ft at 7:00AM Nov 08, 2018Observed: 233.61 ft at 8:00AM Nov 08, 2018Observed: 233.65 ft at 7:00AM Nov 09, 2018Observed: 233.65 ft at 8:00AM Nov 09, 2018Observed: 233.64 ft at 7:00AM Nov 10, 2018Observed: 233.64 ft at 8:00AM Nov 10, 2018Observed: 233.64 ft at 7:00AM Nov 11, 2018Observed: 233.64 ft at 8:00AM Nov 11, 2018Observed: 233.61 ft at 7:00AM Nov 12, 2018Observed: 233.61 ft at 8:00AM Nov 12, 2018Observed: 233.58 ft at 7:00AM Nov 13, 2018Observed: 233.58 ft at 8:00AM Nov 13, 2018Observed: 233.59 ft at 7:00AM Nov 14, 2018Observed: 233.59 ft at 8:00AM Nov 14, 2018Lake Blackshear Power Production OperationsWWCG1(plotting HPIRZ) Graph Created (2:52PM Nov 14, 2018)ObservedLatest observed value: 233.59 ft at 8:00 AM EST 14-Nov-2018. Flood Stage is 239 ft
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Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
NOTE: Automated gauge readings are unavailable, readings taken manually.

NOTE: Forecasts are not available for the Flint River (GA) at Lake Blackshear. Only observed stages are available for this point.

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Upstream Gauge - at Montezuma Upstream Gauge Downstream Gauge Downstream Gauge - near Oakfield (SR 32)
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 239
Action Stage: 237
Low Stage (in feet): 235

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

Zoom Level:14
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Gauge LocationGauge Map Marker
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.
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Latitude: 31.845278° N, Longitude: 83.940833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 239 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 Not Available  
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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.
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Page last modified: 21-Dec-2016 10:38 PM
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