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Weather Forecast Office Austin/San Antonio, TX

West Gulf River Forecast Center

Hydrograph

River at a Glance

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Inundation Mapping

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CDT) 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 Rio Grande at Del Rio are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 7.5 Moderate Flood Stage: 4.7 Flood Stage: 4.5 Action Stage: 4.2 Low Stage (in feet): -9999 Historic Crests (1) 38.25 ft on 06/28/1954 (2) 34.50 ft on 09/01/1932 (3) 33.60 ft on 06/24/1948 (4) 29.90 ft on 09/24/1964 (5) 24.50 ft on 09/05/1935 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 14.61 ft on 07/05/2010 (2) 15.70 ft on 08/23/1998 (P) (3) 7.70 ft on 09/19/1991 (4) 14.08 ft on 09/21/1974 (5) 29.90 ft on 09/24/1964 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:15 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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21	(6.4 meters), Massive flooding washes smaller homes and mobile homes downstream in the Vega Verde Subdivision and floods hundreds of homes. The approach to the Highway 377 International Bridge is under several feet of water. Homes, businesses, streets and bridges along San Felipe Street flood, including the Guyler Street bridge.
18	(5.5 meters), Massive flooding to the roofs of homes in the Vega Verde subdivision below Amistad Dam floods hundreds of homes and washes smaller homes and mobile homes downstream. The Highway 377 approach to the International Bridge floods.
14	(4.3 meteres), Hundreds of homes flood in the Vega Verde subdivision below Amistad Dam with water to the roofs of some. Smaller homes and mobile homes wash downstream. Flow is over a half mile wide in the flood plain between Amistad Dam and Highway 377. Life threatening conditions on the United States and Mexican sides.
11	(3.4 meters), Major flooding. Nearly all homes in the Vega Verde subdivision are now in the flow of the river and cut off.
10	(3.1 meters), Major flooding is occurring. Water reaches the entrance to the Ingram Readymix Plant on Cienegas Road just north of the intersection with Vega Verde Road. A small section of homes located between the 6600 and 7700 blocks of Vega Verde Road remain out of the river channel. Many homes and structures in the low-lying areas of Vega Verde Road are standing in the flow of the river.
8	(2.4 meters), Major flooding. Water reaches the intersection of Vega Verde and Old Foster Road. Many of the homes in the Vega Verde subdivision are now in the flow of the river.
6	(1.8 meters), Moderate lowland flooding occurs. Water is well over the road in the lowest section of the Vega Verde subdivision and is impassible by cars and trucks. Water surrounds some of the homes in the lowest areas of the subdivision. Water also partially encompasses several homes with water covering most of the back yard and coming close to some homes in the subdivision.
4.7	(1.4 meters), Moderate lowland flooding reaches the slab elevation of the lowest homes in the Vega Verde subdivision below Amistad Dam and cuts behind the lowest residential areas cutting them off.
4.4	(1.3 meters), Minor lowland flooding cuts off some residents in the Vega Verde Subdivision below Amistad Dam, and a low section of the road through the subdivision floods. The flow approaches the lowest homes in the subdivision.
4	(1.2 meters), The flow is overbanks into lowest areas of the flood plain, threatening to flood the road through the lowest sections of the Vega Verde subdivision.

About This Location

Latitude: 29.330833° N, Longitude: 100.928889° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 4.5 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 29 869.2 ft 873.2 ft Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available

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