Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov 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 https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations 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.

Weather Forecast Office Austin/San Antonio, TX

West Gulf River Forecast Center

Hydrograph

River at a Glance

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Inundation Mapping

Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CST) Datum: NAVD88 Metadata

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: Forecasts for the Colorado River (TX) above La Grange are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 37 Moderate Flood Stage: 32 Flood Stage: 26 Action Stage: 19 Low Stage (in feet): -9999 Historic Crests (1) 56.70 ft on 07/09/1869 (2) 56.40 ft on 12/05/1913 (3) 54.14 ft on 08/28/2017 (4) 50.84 ft on 06/17/1935 (5) 45.50 ft on 10/20/1998 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 54.14 ft on 08/28/2017 (2) 42.28 ft on 05/28/2016 (3) 35.09 ft on 11/02/2015 (P) (4) 37.22 ft on 05/27/2015 (5) 41.56 ft on 11/23/2004 Show More Recent Crests (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. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:16 Legend FEMA Layer Gauge Location 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

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45	Major flooding with water to the roofs of lowest homes in the Frisch Auf Subdivision. Numerous mobile homes flood severely. Livestock in the flood plain above Smithville to below Columbus are vulnerable to drowning. Roads and bridges in the flood plain are severely flooded and dangerous. River is to the level of 2nd bank and threatens homes and businesses in La Grange.
43	Disastrous flooding of the Colorado River damages several mobile homes in La Grange and five permanent homes in the Fritsch Auf subdivision are flooded up to six to seven feet. Severely flooded roads and bridges near the river make travel and evacuations dangerous.
40	The lowest sites of a trailer park in La Grange in the northwest quadrant of Highway 71 and the Colorado river are threatened. Lowest homes in the Fritsch Auf subdivision have several feet of water in them. Severely flooded roads and bridges near the river make travel and evacuations dangerous.
37	Major flooding of the Colorado River reaches lowest homes in the Fritsch Auf Subdivision on the south bank of the Colorado River in La Grange. Severely flooded roads and bridges near the river make travel and evacuations very dangerous.
36	The lowest part of the road into the Fritsch Auf Subdivision just south of the Colorado River south of downtown floods. The Colorado River approaches lowest homes in the Fritsch Auf Subdivision and additional flow down Buckners Creek will flood them.
32	Moderate lowland flooding reaches the flood plain near La Grange. Homes in the Fritsch Auf Subdivision on the south bank of the Colorado River may be threatened if heavy runoff down Buckners Creek adds to the Colorado River flow at this level.
29	Flow covers lowest areas of the flood plain with no major damage. Lowest roads and bridges are flooded.
26	Minor lowland flooding covers low areas of the flood plain with no significant damage. Lowest roads and bridges are flooded.
23	Flow exceeds the low banks into lowest areas of the flood plain with no damage. Lowest roads and bridges are flooded.
19	Flow exceeds lowest sections of the banks.

About This Location

Latitude: 29.912428° N, Longitude: 96.896993° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 26 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 209.97 ft 235.97 ft 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: U.S. Geological Survey (USGS) Data and Site Info for La Grange

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Rainfall Frequency Atlas Maps Weather Prediction Center Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management West Gulf River Forecast Center Lower Colorado River Authority Guadalupe Blanco River Authority San Antonio River Authority Edwards Aquifer Authority Nueces River Authority International Boundary and Water Commission Snow Information

Collaborative Agencies 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 Austin/San Antonio Weather Forecast Office 2090 Airport Road New Braunfels, TX 78130 (830) 629-0130 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:29 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities