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Guadalupe River at Seguin, TX (SEGT2)


Data Type




Inundation Levels
NAVD88 Stage

492.5* 37.0*
Record Crest: 36.8 ft
491.5 36.0
490.5 35.0
489.5 34.0
488.5 33.0
487.5 32.0
486.5 31.0
485.5 30.0
484.5 29.0
483.5 28.0
482.5 27.0
481.5 26.0

Major Flooding Begins

480.5 25.0
478.5 23.0
477.5 22.0

Moderate Flooding Begins

476.5 21.0
475.5 20.0
474.5 19.0

Minor Flooding Begins

473.5 18.0
472.5 17.0
471.5 16.0
470.5 15.0
469.5 14.0
468.5 13.0
467.5 12.0
466.5 11.0
465.5 10.0
464.5 9.0
463.5 8.0
462.5 7.0
461.5 6.0
460.5 5.0
459.5 4.0
* = Extended rating
Weather Forecast Office Austin/San Antonio, TX West Gulf River Forecast Center

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Current Stage:
1.0 ft at 07/29/2014 12:00:00 UTC
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Inundation Legend Inundation Legend
USGS Gauge Location Gauge Location

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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Map Overlays

Flood Categories (in feet)
Major Flood Stage:26
Moderate Flood Stage:22
Flood Stage:19
Action Stage:4

Historical Crests
(1) 36.80 ft on 10/18/1998
(2) 35.50 ft on 06/16/1935
(3) 33.90 ft on 09/11/1952
(4) 33.00 ft on 01/01/1935
(5) 32.80 ft on 05/11/1972
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(P): Preliminary values subject to further review.

Low Water Records

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
32 SEVERAL HOMES IN LOW AREAS OF THE FLOOD PLAIN IN SEGUIN ARE DESTROYED. SEVERAL TENS ARE SEVERELY DAMAGED. NEARLY ALL OF TREASURE ISLAND IN LAKE MCQUEENY IS UNDER WATER WITH HOMES SEVERELY FLOODED AND DAMAGED. LIVESTOCK IN THE FLOOD PLAIN ABOVE SEGUIN TO BELOW CUERO ARE CUT OFF AND POTENTIALLY DROWNED
29 WIDESPREAD DISASTROUS FLOODING DESTROYS LOWEST HOMES IN THE FLOOD PLAIN AND DAMAGES MANY MORE. NUMEROUS ROADS AND BRIDGES ARE SEVERELY FLOODED AND DANGEROUS
26 MAJOR FLOODING DAMAGES SEVERAL HOMES IN THE GLEN COVE SUBDIVISION AND DOWNSTREAM. NUMEROUS ROADS...STREETS AND BRIDGES ARE EXTREMELY DANGEROUS. LIVESTOCK SHOULD BE MOVED FROM THE FLOOD PLAIN IMMEDIATELY
22 MODERATE LOWLAND FLOODING THREATENS HOMES IN THE GLEN COVE SUBDIVDISION IN SEGUIN. ROADS AND LOW BRIDGES NEAR THE RIVER ARE FLOODED AND DANGEROUS. RUNOFF DOWN WALNUT BRANCH NORTHWEST OF DOWNTOWN THREATENS LOWEST HOMES AND APARTMENTS
19 MINOR LOWLAND FLOODING IS IN LOW AREAS OF THE FLOOD PLAIN APPROACHING BUT NOT REACHING LOWEST HOMES IN SEGUIN. RUNOFF DOWN WALNUT BRANCH NORTHWEST OF DOWNTOWN IS A THREAT TO LOWEST HOMES AND APARTMENTS
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Page last modified: 16-Jul-2014 2:12 AM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.