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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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: Not Available 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 Guadalupe River near Spring Branch are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 39 Moderate Flood Stage: 36 Flood Stage: 30 Action Stage: 25 Low Stage (in feet): -9999 Historic Crests (1) 53.00 ft on 08/03/1869 (2) 49.00 ft on 07/01/1900 (3) 45.25 ft on 08/03/1978 (4) 45.12 ft on 06/22/1997 (5) 43.75 ft on 07/03/2002 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 25.56 ft on 05/30/2016 (2) 29.98 ft on 10/30/2015 (3) 34.50 ft on 05/24/2015 (4) 43.75 ft on 07/03/2002 (5) 27.43 ft on 10/17/1998 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 rises to the USGS gauge house at FM 311. Several homes are cut off above Spring Branch and two homes flood. Approaches to the Highway 281 bridge flood closing the highway. Picnic facilities at Guadalupe River State Park are flooded. Parks and facilities downstream at Canyon Lake are inundated.
43	Major flooding reaches several lowest homes below Comfort to Canyon Lake. Numerous roads and bridges are flooded and dangerous. Lowest facilities in Guadalupe State Park are severely damaged. Parks, docks and roads around Canyon Lake are flooded and damaged.
39	Major flooding reaches secondary roads and low bridges near the river making them extremely dangerous to motorists. The lowest residences flood from Kendall County to Canyon Lake. Picnic and camping facilities in Guadalupe River State Park upstream are severely flooded. Roads, marinas, and many parks and facilities at Canyon Lake flood.
36	Moderate lowland flooding reaches secondary roads and low bridges in the flood plain. Recreationists should evacuate the river banks because of dangerous turbulent flow. Low sections of Guadalupe River State Park have tables, trash cans, and equiment damaged. Lowest homes in Kendall County to Canyon Lake flood.
30	Minor lowland flooding rises into the flood plain at Guadalupe River State Park damaging tables, trash cans and camping equipment. Swimming and any recreation in the river is extremely dangerous with turbulence, trees and trash in the water.
28	Minor lowland flooding extends into lowest areas of Guadalupe River State Park. Swimming, tubing, and canoeing above Guadalupe River State Park to Canyon Lake is dangerous except with commercial outfitters.
25	Flow extends over lowest sections of banks. Turbulent flow is very dangerous to tubers and swimmers above Guadalupe River State Park except with commercial outfitters.
23	Turbulent flow makes swimming and tubing dangerous above Guadalupe River State Park to Canyon Lake. Lowest areas of Guadalupe River State Park are flooded.
19	Turbulent flow makes swimming and tubing dangerous above Guadalupe River State Park to Canyon Lake.
15	The Guadalupe river is dangerous to swimmers, tubers and canoeists above Guadalupe River State Park to Canyon Lake, except with commercial outfitters.

About This Location

Latitude: 29.860278° N, Longitude: 98.383333° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 30 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 948.1 ft 978.1 ft 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 Spring Branch

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