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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Hydrograph River at a Glance Download
Tallahala Creek near Runnelstown Stage (ft)Flow (kcfs)RNTM6(plotting HGIRG) Graph Created (9:00PM Dec 7, 2023)Flood Stage is 21 ft
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Tabular Data (UTC)
Tabular Data (CST)
XML Data
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Datum: Not Available
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Automatic observations from this river gage have been discontinued due to loss of funding. Contact webmaster at the link below if you can help.

NOTE: Forecasts for the Tallahala Creek near Runnelstown are issued as needed during times of high water, but are not routinely available.

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Flood Categories (in feet)
Major Flood Stage: 35
Moderate Flood Stage: 29.5
Flood Stage: 21
Action Stage: 16
Low Stage (in feet): 0

Historic Crests
(1) 30.50 ft on 04/01/1900
(2) 28.44 ft on 04/16/1974
(3) 26.50 ft on 12/01/1919
(4) 26.43 ft on 04/16/1980
(5) 25.65 ft on 03/15/2016
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 24.78 ft on 12/30/2018
(2) 25.65 ft on 03/15/2016
(3) 22.59 ft on 04/12/2014
(4) 22.41 ft on 02/17/2013
(5) 21.54 ft on 02/12/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.90 ft on 08/20/1986

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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If you notice any errors in the below information, please contact our Webmaster
35 Approximate floor level of Tallahala Creek Bridge.
29.5 USGS 100 year flood.
26 Water in houses on southern end of Lee Road.
25 Water approaches the foundation of houses on east side of Lee Road.
24 Water begins to flood yards of houses on the southen end of Lee Road in Runnelstown.
21 Lowland flooding begins. Water begins to flood several fish camps downstream from Runnelstown.
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Latitude: 31.332778° N, Longitude: 89.112500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 21 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 104.58 ft 125.58 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
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Mobile, AL 36608
(251) 633-6443
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