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Hydrograph River at a Glance Download
Colorado River (TX) at Austin Stage (ft)Flow (cfs)Observed: 11.4 ft at 12:00AM Oct 17, 2021Observed: 11.41 ft at 1:00AM Oct 17, 2021Observed: 11.41 ft at 2:00AM Oct 17, 2021Observed: 11.41 ft at 3:00AM Oct 17, 2021Observed: 11.4 ft at 4:00AM Oct 17, 2021Observed: 11.4 ft at 5:00AM Oct 17, 2021Observed: 11.4 ft at 6:00AM Oct 17, 2021Observed: 11.4 ft at 7:00AM Oct 17, 2021Observed: 11.4 ft at 8:00AM Oct 17, 2021Observed: 11.41 ft at 9:00AM Oct 17, 2021Observed: 11.41 ft at 10:00AM Oct 17, 2021Observed: 11.4 ft at 11:00AM Oct 17, 2021Observed: 11.4 ft at 12:00PM Oct 17, 2021Observed: 11.39 ft at 1:00PM Oct 17, 2021Observed: 11.39 ft at 2:00PM Oct 17, 2021Observed: 11.39 ft at 3:00PM Oct 17, 2021Observed: 11.39 ft at 4:00PM Oct 17, 2021Observed: 11.39 ft at 5:00PM Oct 17, 2021Observed: 11.39 ft at 6:00PM Oct 17, 2021Observed: 11.4 ft at 7:00PM Oct 17, 2021Observed: 11.4 ft at 8:00PM Oct 17, 2021Observed: 11.4 ft at 9:00PM Oct 17, 2021Observed: 11.41 ft at 10:00PM Oct 17, 2021Observed: 11.41 ft at 11:00PM Oct 17, 2021Observed: 11.41 ft at 12:00AM Oct 18, 2021Observed: 11.42 ft at 1:00AM Oct 18, 2021Observed: 11.42 ft at 2:00AM Oct 18, 2021Observed: 11.42 ft at 3:00AM Oct 18, 2021Observed: 11.41 ft at 4:00AM Oct 18, 2021Observed: 11.41 ft at 5:00AM Oct 18, 2021Observed: 11.4 ft at 6:00AM Oct 18, 2021Observed: 11.38 ft at 7:00AM Oct 18, 2021Observed: 11.37 ft at 8:00AM Oct 18, 2021Observed: 11.37 ft at 9:00AM Oct 18, 2021Observed: 11.37 ft at 10:00AM Oct 18, 2021Observed: 11.36 ft at 11:00AM Oct 18, 2021Observed: 11.37 ft at 12:00PM Oct 18, 2021Observed: 11.37 ft at 1:00PM Oct 18, 2021Observed: 11.37 ft at 2:00PM Oct 18, 2021Observed: 11.36 ft at 3:00PM Oct 18, 2021Observed: 11.36 ft at 4:00PM Oct 18, 2021Observed: 11.36 ft at 5:00PM Oct 18, 2021Observed: 11.36 ft at 6:00PM Oct 18, 2021Observed: 11.35 ft at 7:00PM Oct 18, 2021Observed: 11.35 ft at 8:00PM Oct 18, 2021Observed: 11.35 ft at 9:00PM Oct 18, 2021Observed: 11.35 ft at 10:00PM Oct 18, 2021Observed: 11.35 ft at 11:00PM Oct 18, 2021Observed: 11.34 ft at 12:00AM Oct 19, 2021Observed: 11.34 ft at 1:00AM Oct 19, 2021Observed: 11.34 ft at 2:00AM Oct 19, 2021Observed: 11.34 ft at 3:00AM Oct 19, 2021Observed: 11.34 ft at 4:00AM Oct 19, 2021Observed: 11.32 ft at 5:00AM Oct 19, 2021Observed: 11.32 ft at 6:00AM Oct 19, 2021Observed: 11.32 ft at 7:00AM Oct 19, 2021Observed: 11.32 ft at 8:00AM Oct 19, 2021Observed: 11.32 ft at 9:00AM Oct 19, 2021Observed: 11.32 ft at 10:00AM Oct 19, 2021Highest Observation: 12.71 ft at 11:00AM Oct 19, 2021Observed: 12.59 ft at 12:00PM Oct 19, 2021Observed: 12.22 ft at 1:00PM Oct 19, 2021Observed: 11.96 ft at 2:00PM Oct 19, 2021Observed: 11.78 ft at 3:00PM Oct 19, 2021Observed: 11.64 ft at 4:00PM Oct 19, 2021Observed: 11.54 ft at 5:00PM Oct 19, 2021Observed: 11.48 ft at 6:00PM Oct 19, 2021Observed: 11.42 ft at 7:00PM Oct 19, 2021Observed: 11.38 ft at 8:00PM Oct 19, 2021Observed: 11.35 ft at 9:00PM Oct 19, 2021Observed: 11.33 ft at 10:00PM Oct 19, 2021Observed: 11.31 ft at 11:00PM Oct 19, 2021Observed: 11.29 ft at 12:00AM Oct 20, 2021Observed: 11.29 ft at 1:00AM Oct 20, 2021Observed: 11.28 ft at 2:00AM Oct 20, 2021Observed: 11.26 ft at 3:00AM Oct 20, 2021Observed: 11.26 ft at 4:00AM Oct 20, 2021Observed: 11.25 ft at 5:00AM Oct 20, 2021Observed: 11.25 ft at 6:00AM Oct 20, 2021Observed: 11.24 ft at 7:00AM Oct 20, 2021Observed: 11.23 ft at 8:00AM Oct 20, 2021Observed: 11.23 ft at 9:00AM Oct 20, 2021Observed: 11.22 ft at 10:00AM Oct 20, 2021Observed: 11.22 ft at 11:00AM Oct 20, 2021Observed: 11.21 ft at 12:00PM Oct 20, 2021Observed: 11.22 ft at 1:00PM Oct 20, 2021Observed: 11.22 ft at 2:00PM Oct 20, 2021Observed: 11.23 ft at 3:00PM Oct 20, 2021Observed: 11.22 ft at 4:00PM Oct 20, 2021Observed: 11.22 ft at 5:00PM Oct 20, 2021Observed: 11.23 ft at 6:00PM Oct 20, 2021Observed: 11.23 ft at 7:00PM Oct 20, 2021Observed: 11.23 ft at 8:00PM Oct 20, 2021Observed: 11.24 ft at 9:00PM Oct 20, 2021Observed: 11.24 ft at 10:00PM Oct 20, 2021Observed: 11.24 ft at 11:00PM Oct 20, 2021Observed: 11.25 ft at 12:00AM Oct 21, 2021Observed: 11.25 ft at 1:00AM Oct 21, 2021Observed: 11.25 ft at 2:00AM Oct 21, 2021Observed: 11.25 ft at 3:00AM Oct 21, 2021Observed: 11.26 ft at 4:00AM Oct 21, 2021Observed: 11.26 ft at 5:00AM Oct 21, 2021Observed: 11.25 ft at 6:00AM Oct 21, 2021Observed: 11.25 ft at 7:00AM Oct 21, 2021Observed: 11.24 ft at 8:00AM Oct 21, 2021Observed: 11.24 ft at 9:00AM Oct 21, 2021Observed: 11.23 ft at 10:00AM Oct 21, 2021Observed: 11.23 ft at 11:00AM Oct 21, 2021Observed: 11.23 ft at 12:00PM Oct 21, 2021Observed: 11.23 ft at 1:00PM Oct 21, 2021Observed: 11.23 ft at 2:00PM Oct 21, 2021Observed: 11.24 ft at 3:00PM Oct 21, 2021Observed: 11.23 ft at 4:00PM Oct 21, 2021Observed: 11.22 ft at 5:00PM Oct 21, 2021Observed: 11.21 ft at 6:00PM Oct 21, 2021Observed: 11.21 ft at 7:00PM Oct 21, 2021Observed: 11.2 ft at 8:00PM Oct 21, 2021Observed: 11.19 ft at 9:00PM Oct 21, 2021Observed: 11.18 ft at 10:00PM Oct 21, 2021Observed: 11.18 ft at 11:00PM Oct 21, 2021Forecast: 11.2 ft 12:00AM Oct 22, 2021Forecast: 11.2 ft 1:00AM Oct 22, 2021Forecast: 11.2 ft 2:00AM Oct 22, 2021Forecast: 11.7 ft 3:00AM Oct 22, 2021Forecast: 12.1 ft 4:00AM Oct 22, 2021Forecast: 12.5 ft 5:00AM Oct 22, 2021Forecast: 12.9 ft 6:00AM Oct 22, 2021Forecast: 12.3 ft 7:00AM Oct 22, 2021Forecast: 11.7 ft 8:00AM Oct 22, 2021Forecast: 11.6 ft 9:00AM Oct 22, 2021Forecast: 11.6 ft 10:00AM Oct 22, 2021Forecast: 11.5 ft 11:00AM Oct 22, 2021Forecast: 11.5 ft 12:00PM Oct 22, 2021Forecast: 11.4 ft 1:00PM Oct 22, 2021Forecast: 11.4 ft 2:00PM Oct 22, 2021Forecast: 11.4 ft 3:00PM Oct 22, 2021Forecast: 11.3 ft 4:00PM Oct 22, 2021Forecast: 11.3 ft 5:00PM Oct 22, 2021Forecast: 11.3 ft 6:00PM Oct 22, 2021Forecast: 11.3 ft 7:00PM Oct 22, 2021Forecast: 11.3 ft 8:00PM Oct 22, 2021Forecast: 11.3 ft 9:00PM Oct 22, 2021Forecast: 11.3 ft 10:00PM Oct 22, 2021Forecast: 11.3 ft 11:00PM Oct 22, 2021Forecast: 11.3 ft 12:00AM Oct 23, 2021Forecast: 11.3 ft 1:00AM Oct 23, 2021Forecast: 11.3 ft 2:00AM Oct 23, 2021Forecast: 11.2 ft 3:00AM Oct 23, 2021Forecast: 11.2 ft 4:00AM Oct 23, 2021Forecast: 11.2 ft 5:00AM Oct 23, 2021Forecast: 11.2 ft 6:00AM Oct 23, 2021Forecast: 11.2 ft 7:00AM Oct 23, 2021Forecast: 11.2 ft 8:00AM Oct 23, 2021Forecast: 11.2 ft 9:00AM Oct 23, 2021Forecast: 11.2 ft 10:00AM Oct 23, 2021Forecast: 11.2 ft 11:00AM Oct 23, 2021Forecast: 11.2 ft 12:00PM Oct 23, 2021Forecast: 11.2 ft 1:00PM Oct 23, 2021Forecast: 11.2 ft 2:00PM Oct 23, 2021Forecast: 11.2 ft 3:00PM Oct 23, 2021Forecast: 11.2 ft 4:00PM Oct 23, 2021Forecast: 11.2 ft 5:00PM Oct 23, 2021Forecast: 11.2 ft 6:00PM Oct 23, 2021Forecast: 11.8 ft 7:00PM Oct 23, 2021Forecast: 12.4 ft 8:00PM Oct 23, 2021Highest Forecast: 13 ft 9:00PM Oct 23, 2021Forecast: 12.7 ft 10:00PM Oct 23, 2021Forecast: 12.4 ft 11:00PM Oct 23, 2021Forecast: 12.1 ft 12:00AM Oct 24, 2021Forecast: 11.8 ft 1:00AM Oct 24, 2021Forecast: 11.5 ft 2:00AM Oct 24, 2021Forecast: 11.5 ft 3:00AM Oct 24, 2021Forecast: 11.4 ft 4:00AM Oct 24, 2021Forecast: 11.4 ft 5:00AM Oct 24, 2021Forecast: 11.3 ft 6:00AM Oct 24, 2021Forecast: 11.3 ft 7:00AM Oct 24, 2021Forecast: 11.3 ft 8:00AM Oct 24, 2021Forecast: 11.2 ft 9:00AM Oct 24, 2021Forecast: 11.2 ft 10:00AM Oct 24, 2021Forecast: 11.2 ft 11:00AM Oct 24, 2021Forecast: 11.2 ft 12:00PM Oct 24, 2021Forecast: 11.2 ft 1:00PM Oct 24, 2021Forecast: 11.2 ft 2:00PM Oct 24, 2021Forecast: 11.2 ft 3:00PM Oct 24, 2021Forecast: 11.2 ft 4:00PM Oct 24, 2021Forecast: 11.2 ft 5:00PM Oct 24, 2021Forecast: 11.2 ft 6:00PM Oct 24, 2021Forecast: 11.2 ft 7:00PM Oct 24, 2021Forecast: 11.2 ft 8:00PM Oct 24, 2021Forecast: 11.2 ft 9:00PM Oct 24, 2021Forecast: 11.2 ft 10:00PM Oct 24, 2021Forecast: 11.2 ft 11:00PM Oct 24, 2021Forecast: 11.2 ft 12:00AM Oct 25, 2021Forecast: 11.2 ft 1:00AM Oct 25, 2021Forecast: 11.2 ft 2:00AM Oct 25, 2021Forecast: 11.2 ft 3:00AM Oct 25, 2021Forecast: 11.2 ft 4:00AM Oct 25, 2021Forecast: 11.2 ft 5:00AM Oct 25, 2021Forecast: 11.2 ft 6:00AM Oct 25, 2021Forecast: 11.2 ft 7:00AM Oct 25, 2021Forecast: 11.2 ft 8:00AM Oct 25, 2021Forecast: 11.2 ft 9:00AM Oct 25, 2021Forecast: 11.2 ft 10:00AM Oct 25, 2021Forecast: 11.2 ft 11:00AM Oct 25, 2021Forecast: 11.2 ft 12:00PM Oct 25, 2021Forecast: 11.2 ft 1:00PM Oct 25, 2021Forecast: 11.2 ft 2:00PM Oct 25, 2021Forecast: 11.2 ft 3:00PM Oct 25, 2021Forecast: 11.2 ft 4:00PM Oct 25, 2021Forecast: 11.8 ft 5:00PM Oct 25, 2021Forecast: 12.4 ft 6:00PM Oct 25, 2021Highest Forecast: 13 ft 7:00PM Oct 25, 2021Forecast: 12.8 ft 8:00PM Oct 25, 2021Forecast: 12.5 ft 9:00PM Oct 25, 2021Forecast: 12.2 ft 10:00PM Oct 25, 2021Forecast: 12 ft 11:00PM Oct 25, 2021Forecast: 11.7 ft 12:00AM Oct 26, 2021Forecast: 11.4 ft 1:00AM Oct 26, 2021Forecast: 11.4 ft 2:00AM Oct 26, 2021Forecast: 11.4 ft 3:00AM Oct 26, 2021Forecast: 11.3 ft 4:00AM Oct 26, 2021Forecast: 11.3 ft 5:00AM Oct 26, 2021Forecast: 11.2 ft 6:00AM Oct 26, 2021Forecast: 11.2 ft 7:00AM Oct 26, 2021USGS--Water Resources of the United StatesACRT2(plotting HGIRZ) Graph Created (11:18PM Oct 21, 2021)ObservedForecast (issued 8:07AM Oct 21)Latest observed value: 11.18 ft at 11:00 PM CDT 21-Oct-2021. Flood Stage is 33 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
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) at Austin are issued routinely year-round.

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Upstream Gauge - at Lake Austin Upstream Gauge Downstream Gauge Downstream Gauge - at Bastrop
Flood Categories (in feet)
Major Flood Stage: 42
Moderate Flood Stage: 38
Flood Stage: 33
Action Stage: 25
Low Stage (in feet): -9999

Historic Crests
(1) 51.00 ft on 07/07/1869
(2) 50.00 ft on 06/15/1935
(3) 45.20 ft on 07/25/1938
(4) 43.50 ft on 04/07/1900
(5) 43.20 ft on 09/28/1936
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 33.22 ft on 10/30/2015 (P)
(2) 34.09 ft on 05/26/2015
(3) 27.70 ft on 09/08/2010
(4) 25.91 ft on 11/22/2004
(5) 24.58 ft on 11/15/2001
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.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
If you notice any errors in the below information, please contact our Webmaster
46 Several homes flood in the Colorado River flood plain below Del Valle to Bastrop and along Onion Creek above the Colorado River confluence are severely flooded. Numerous streets and roads are extremely dangerous. Major flooding extends well into the flood plain destroying equipment and livestock.
44 Major flooding approaches homes in the flood plain below Del Valle to Bastrop. Equipment and livestock should be moved from the flood plain to below Bastrop. Secondary and primary roads and bridges are flooded severely and very dangerous to motorists.
42 Major flooding approaches the lowest residences along the Colorado River below Del Valle. Residences in the lower reach of Onion Creek are vulnerable to flooding as the Colorado River backs up the creek and adds to runoff down Onion Creek. Livestock and equipment should be moved from the flood plain below Austin to Bastrop. Lowest homes flood near Webberville.
40 Lowest homes in the flood plain below Longhorn Dam to above Bastrop Flood. Livestock and equipment should be moved from low areas of the flood plain below Lake Travis to below Bastrop. Roads and low bridges in the flood plain flood severely and are dangerous to motorists.
38 Moderate flooding approaches the Colorado River ranchettes in the southwest quadrant of the confluence of the Colorado River and Dry Creek. Lowest homes downstream below Austin flood. Livestock should be moved from vulnerable areas of the flood plain.
36 Several homes are threatened as the Colorado River backs up Onion Creek. Any additional flooding down onion creek may flood homes near the confluence with the Colorado River. Livestock should be moved from vulnerable areas of the flood plain below Austin. Lowest homes below Austin flood.
35 Lowest homes and apartments near the Colorado River and the lower part of Onion Creek are threatened. Residents should monitor NOAA All Hazards Weather Radio for developing flood warnings. Livestock can be cut off in low areas below Austin. Lowest homes below Austin to Bastrop flood.
33 Minor lowland flooding reaches low areas of the flood plain. No significant damage occurs at this level near Austin but livestock should be moved from low lying areas downstream. Lowest homes below Austin to Bastrop are threatened.
31 Flow is well into the flood plain below Lake Travis downstream. Livestock should be moved from low areas of the flood plain downstream below Austin.
29 Flow is into the lowest sections of the flood plain.
27 Flow is in the lowest sections of the flood plain.
25 Flow exceeds the lowest sections of the banks.
About This Location Collapse

Latitude: 30.246111° N, Longitude: 97.680000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 33 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 29 391.97 ft 424.97 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:
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
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