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Hydrograph River at a Glance Download
Rio Grande at Castolon Stage (ft)Flow (kcfs)Observed: 2.15 ft at 11:00PM Nov 28, 2021Observed: 2.15 ft at 11:15PM Nov 28, 2021Observed: 2.15 ft at 11:30PM Nov 28, 2021Observed: 2.15 ft at 11:45PM Nov 28, 2021Observed: 2.15 ft at 12:00AM Nov 29, 2021Observed: 2.15 ft at 12:15AM Nov 29, 2021Observed: 2.15 ft at 12:30AM Nov 29, 2021Observed: 2.15 ft at 12:45AM Nov 29, 2021Observed: 2.15 ft at 1:00AM Nov 29, 2021Observed: 2.15 ft at 1:15AM Nov 29, 2021Observed: 2.15 ft at 1:30AM Nov 29, 2021Observed: 2.15 ft at 1:45AM Nov 29, 2021Observed: 2.15 ft at 2:00AM Nov 29, 2021Observed: 2.15 ft at 2:15AM Nov 29, 2021Observed: 2.15 ft at 2:30AM Nov 29, 2021Observed: 2.15 ft at 2:45AM Nov 29, 2021Observed: 2.15 ft at 3:00AM Nov 29, 2021Observed: 2.15 ft at 3:15AM Nov 29, 2021Observed: 2.15 ft at 3:30AM Nov 29, 2021Observed: 2.15 ft at 3:45AM Nov 29, 2021Observed: 2.15 ft at 4:00AM Nov 29, 2021Observed: 2.15 ft at 4:15AM Nov 29, 2021Observed: 2.15 ft at 4:30AM Nov 29, 2021Observed: 2.15 ft at 4:45AM Nov 29, 2021Observed: 2.15 ft at 5:00AM Nov 29, 2021Observed: 2.15 ft at 5:15AM Nov 29, 2021Observed: 2.15 ft at 5:30AM Nov 29, 2021Observed: 2.15 ft at 5:45AM Nov 29, 2021Observed: 2.15 ft at 6:00AM Nov 29, 2021Observed: 2.15 ft at 6:15AM Nov 29, 2021Observed: 2.15 ft at 6:30AM Nov 29, 2021Observed: 2.15 ft at 6:45AM Nov 29, 2021Observed: 2.15 ft at 7:00AM Nov 29, 2021Observed: 2.15 ft at 7:15AM Nov 29, 2021Observed: 2.15 ft at 7:30AM Nov 29, 2021Observed: 2.15 ft at 7:45AM Nov 29, 2021Observed: 2.15 ft at 8:00AM Nov 29, 2021Observed: 2.15 ft at 8:15AM Nov 29, 2021Observed: 2.15 ft at 8:30AM Nov 29, 2021Observed: 2.15 ft at 8:45AM Nov 29, 2021Observed: 2.15 ft at 9:00AM Nov 29, 2021Observed: 2.15 ft at 9:15AM Nov 29, 2021Observed: 2.15 ft at 9:30AM Nov 29, 2021Observed: 2.15 ft at 9:45AM Nov 29, 2021Observed: 2.15 ft at 10:00AM Nov 29, 2021Observed: 2.15 ft at 10:15AM Nov 29, 2021Observed: 2.15 ft at 10:30AM Nov 29, 2021Observed: 2.15 ft at 10:45AM Nov 29, 2021Observed: 2.15 ft at 11:00AM Nov 29, 2021Observed: 2.15 ft at 11:15AM Nov 29, 2021Observed: 2.15 ft at 11:30AM Nov 29, 2021Observed: 2.15 ft at 11:45AM Nov 29, 2021Observed: 2.15 ft at 12:00PM Nov 29, 2021Observed: 2.15 ft at 12:15PM Nov 29, 2021Observed: 2.15 ft at 12:30PM Nov 29, 2021Observed: 2.15 ft at 12:45PM Nov 29, 2021Observed: 2.15 ft at 1:00PM Nov 29, 2021Observed: 2.15 ft at 1:15PM Nov 29, 2021Observed: 2.15 ft at 1:30PM Nov 29, 2021Observed: 2.15 ft at 1:45PM Nov 29, 2021Observed: 2.15 ft at 2:00PM Nov 29, 2021Observed: 2.15 ft at 2:15PM Nov 29, 2021Observed: 2.15 ft at 2:30PM Nov 29, 2021Observed: 2.15 ft at 2:45PM Nov 29, 2021Observed: 2.15 ft at 3:00PM Nov 29, 2021Observed: 2.15 ft at 3:15PM Nov 29, 2021Observed: 2.15 ft at 3:30PM Nov 29, 2021Observed: 2.15 ft at 3:45PM Nov 29, 2021Observed: 2.15 ft at 4:00PM Nov 29, 2021Observed: 2.15 ft at 4:15PM Nov 29, 2021Observed: 2.15 ft at 4:30PM Nov 29, 2021Observed: 2.15 ft at 4:45PM Nov 29, 2021Observed: 2.15 ft at 5:00PM Nov 29, 2021Observed: 2.15 ft at 5:15PM Nov 29, 2021Observed: 2.15 ft at 5:30PM Nov 29, 2021Observed: 2.15 ft at 5:45PM Nov 29, 2021Observed: 2.15 ft at 6:00PM Nov 29, 2021Observed: 2.15 ft at 6:15PM Nov 29, 2021Highest Observation: 2.16 ft at 6:30PM Nov 29, 2021Observed: 2.15 ft at 6:45PM Nov 29, 2021Observed: 2.15 ft at 7:00PM Nov 29, 2021Observed: 2.15 ft at 7:15PM Nov 29, 2021Highest Observation: 2.16 ft at 7:30PM Nov 29, 2021Observed: 2.15 ft at 7:45PM Nov 29, 2021Observed: 2.15 ft at 8:00PM Nov 29, 2021Highest Observation: 2.16 ft at 8:15PM Nov 29, 2021Highest Observation: 2.16 ft at 8:30PM Nov 29, 2021Observed: 2.15 ft at 8:45PM Nov 29, 2021Highest Observation: 2.16 ft at 9:00PM Nov 29, 2021Observed: 2.15 ft at 9:15PM Nov 29, 2021Highest Observation: 2.16 ft at 9:30PM Nov 29, 2021Observed: 2.15 ft at 9:45PM Nov 29, 2021Observed: 2.15 ft at 10:00PM Nov 29, 2021Observed: 2.15 ft at 10:15PM Nov 29, 2021Highest Observation: 2.16 ft at 10:30PM Nov 29, 2021Highest Observation: 2.16 ft at 10:45PM Nov 29, 2021Highest Observation: 2.16 ft at 11:00PM Nov 29, 2021Observed: 2.15 ft at 11:15PM Nov 29, 2021Observed: 2.15 ft at 11:30PM Nov 29, 2021Observed: 2.15 ft at 11:45PM Nov 29, 2021Observed: 2.15 ft at 12:00AM Nov 30, 2021Highest Observation: 2.16 ft at 12:15AM Nov 30, 2021Highest Observation: 2.16 ft at 12:30AM Nov 30, 2021Highest Observation: 2.16 ft at 12:45AM Nov 30, 2021Observed: 2.15 ft at 1:00AM Nov 30, 2021Highest Observation: 2.16 ft at 1:15AM Nov 30, 2021Highest Observation: 2.16 ft at 1:30AM Nov 30, 2021Observed: 2.15 ft at 1:45AM Nov 30, 2021Observed: 2.15 ft at 2:00AM Nov 30, 2021Observed: 2.15 ft at 2:15AM Nov 30, 2021Observed: 2.15 ft at 2:30AM Nov 30, 2021Observed: 2.15 ft at 2:45AM Nov 30, 2021Highest Observation: 2.16 ft at 3:00AM Nov 30, 2021Observed: 2.15 ft at 3:15AM Nov 30, 2021Observed: 2.15 ft at 3:30AM Nov 30, 2021Observed: 2.15 ft at 3:45AM Nov 30, 2021Observed: 2.15 ft at 4:00AM Nov 30, 2021Observed: 2.15 ft at 4:15AM Nov 30, 2021Highest Observation: 2.16 ft at 4:30AM Nov 30, 2021Highest Observation: 2.16 ft at 4:45AM Nov 30, 2021Highest Observation: 2.16 ft at 5:00AM Nov 30, 2021Highest Observation: 2.16 ft at 5:15AM Nov 30, 2021Highest Observation: 2.16 ft at 5:30AM Nov 30, 2021Highest Observation: 2.16 ft at 5:45AM Nov 30, 2021Highest Observation: 2.16 ft at 6:00AM Nov 30, 2021Highest Observation: 2.16 ft at 6:15AM Nov 30, 2021Highest Observation: 2.16 ft at 6:30AM Nov 30, 2021Highest Observation: 2.16 ft at 6:45AM Nov 30, 2021Highest Observation: 2.16 ft at 7:00AM Nov 30, 2021Highest Observation: 2.16 ft at 7:15AM Nov 30, 2021Highest Observation: 2.16 ft at 7:30AM Nov 30, 2021Highest Observation: 2.16 ft at 7:45AM Nov 30, 2021Highest Observation: 2.16 ft at 8:00AM Nov 30, 2021Highest Observation: 2.16 ft at 8:15AM Nov 30, 2021Highest Observation: 2.16 ft at 8:30AM Nov 30, 2021Observed: 2.15 ft at 8:45AM Nov 30, 2021Observed: 2.15 ft at 9:00AM Nov 30, 2021Observed: 2.15 ft at 9:15AM Nov 30, 2021Observed: 2.15 ft at 9:30AM Nov 30, 2021Observed: 2.14 ft at 9:45AM Nov 30, 2021Observed: 2.15 ft at 10:00AM Nov 30, 2021Observed: 2.14 ft at 10:15AM Nov 30, 2021Observed: 2.14 ft at 10:30AM Nov 30, 2021Observed: 2.14 ft at 10:45AM Nov 30, 2021Observed: 2.14 ft at 11:00AM Nov 30, 2021Observed: 2.14 ft at 11:15AM Nov 30, 2021Observed: 2.14 ft at 11:30AM Nov 30, 2021Observed: 2.14 ft at 11:45AM Nov 30, 2021Observed: 2.14 ft at 12:00PM Nov 30, 2021Observed: 2.14 ft at 12:15PM Nov 30, 2021Observed: 2.14 ft at 12:30PM Nov 30, 2021Observed: 2.14 ft at 12:45PM Nov 30, 2021Observed: 2.14 ft at 1:00PM Nov 30, 2021Observed: 2.14 ft at 1:15PM Nov 30, 2021Observed: 2.14 ft at 1:30PM Nov 30, 2021Observed: 2.14 ft at 1:45PM Nov 30, 2021Observed: 2.14 ft at 2:00PM Nov 30, 2021Observed: 2.15 ft at 2:15PM Nov 30, 2021Observed: 2.15 ft at 2:30PM Nov 30, 2021Observed: 2.15 ft at 2:45PM Nov 30, 2021Observed: 2.15 ft at 3:00PM Nov 30, 2021Observed: 2.15 ft at 3:15PM Nov 30, 2021Observed: 2.15 ft at 3:30PM Nov 30, 2021Observed: 2.15 ft at 3:45PM Nov 30, 2021Highest Observation: 2.16 ft at 4:00PM Nov 30, 2021Highest Observation: 2.16 ft at 4:15PM Nov 30, 2021Highest Observation: 2.16 ft at 4:30PM Nov 30, 2021Highest Observation: 2.16 ft at 4:45PM Nov 30, 2021Observed: 2.15 ft at 5:00PM Nov 30, 2021Highest Observation: 2.16 ft at 5:15PM Nov 30, 2021Observed: 2.15 ft at 5:30PM Nov 30, 2021Observed: 2.15 ft at 5:45PM Nov 30, 2021Observed: 2.15 ft at 6:00PM Nov 30, 2021Observed: 2.15 ft at 6:15PM Nov 30, 2021Observed: 2.15 ft at 6:30PM Nov 30, 2021Observed: 2.15 ft at 6:45PM Nov 30, 2021Highest Observation: 2.16 ft at 7:00PM Nov 30, 2021Highest Observation: 2.16 ft at 7:15PM Nov 30, 2021Highest Observation: 2.16 ft at 7:30PM Nov 30, 2021Observed: 2.15 ft at 7:45PM Nov 30, 2021Highest Observation: 2.16 ft at 8:00PM Nov 30, 2021Highest Observation: 2.16 ft at 8:15PM Nov 30, 2021Observed: 2.15 ft at 8:30PM Nov 30, 2021Observed: 2.15 ft at 8:45PM Nov 30, 2021Observed: 2.15 ft at 9:00PM Nov 30, 2021Highest Observation: 2.16 ft at 9:15PM Nov 30, 2021Highest Observation: 2.16 ft at 9:30PM Nov 30, 2021Highest Observation: 2.16 ft at 9:45PM Nov 30, 2021Observed: 2.15 ft at 10:00PM Nov 30, 2021Observed: 2.15 ft at 10:15PM Nov 30, 2021Observed: 2.15 ft at 10:30PM Nov 30, 2021Observed: 2.15 ft at 10:45PM Nov 30, 2021Observed: 2.15 ft at 11:00PM Nov 30, 2021Observed: 2.15 ft at 11:15PM Nov 30, 2021Observed: 2.15 ft at 11:30PM Nov 30, 2021Observed: 2.15 ft at 11:45PM Nov 30, 2021Observed: 2.15 ft at 12:00AM Dec 01, 2021Observed: 2.15 ft at 12:15AM Dec 01, 2021Observed: 2.15 ft at 12:30AM Dec 01, 2021Observed: 2.15 ft at 12:45AM Dec 01, 2021Observed: 2.15 ft at 1:00AM Dec 01, 2021Observed: 2.15 ft at 1:15AM Dec 01, 2021Observed: 2.15 ft at 1:30AM Dec 01, 2021Observed: 2.15 ft at 1:45AM Dec 01, 2021Observed: 2.15 ft at 2:00AM Dec 01, 2021Observed: 2.15 ft at 2:15AM Dec 01, 2021Observed: 2.15 ft at 2:30AM Dec 01, 2021Observed: 2.15 ft at 2:45AM Dec 01, 2021Observed: 2.15 ft at 3:00AM Dec 01, 2021Observed: 2.15 ft at 3:15AM Dec 01, 2021Observed: 2.15 ft at 3:30AM Dec 01, 2021Observed: 2.15 ft at 3:45AM Dec 01, 2021Observed: 2.15 ft at 4:00AM Dec 01, 2021Observed: 2.15 ft at 4:15AM Dec 01, 2021Observed: 2.15 ft at 4:30AM Dec 01, 2021Highest Observation: 2.16 ft at 4:45AM Dec 01, 2021Highest Observation: 2.16 ft at 5:00AM Dec 01, 2021Highest Observation: 2.16 ft at 5:15AM Dec 01, 2021Highest Observation: 2.16 ft at 5:30AM Dec 01, 2021Highest Observation: 2.16 ft at 5:45AM Dec 01, 2021Highest Observation: 2.16 ft at 6:00AM Dec 01, 2021Highest Observation: 2.16 ft at 6:15AM Dec 01, 2021Observed: 2.15 ft at 6:30AM Dec 01, 2021Highest Observation: 2.16 ft at 6:45AM Dec 01, 2021Observed: 2.15 ft at 7:00AM Dec 01, 2021Observed: 2.15 ft at 7:15AM Dec 01, 2021Observed: 2.15 ft at 7:30AM Dec 01, 2021Observed: 2.15 ft at 7:45AM Dec 01, 2021Observed: 2.15 ft at 8:00AM Dec 01, 2021Observed: 2.15 ft at 8:15AM Dec 01, 2021Observed: 2.15 ft at 8:30AM Dec 01, 2021Observed: 2.15 ft at 8:45AM Dec 01, 2021Observed: 2.15 ft at 9:00AM Dec 01, 2021Observed: 2.15 ft at 9:15AM Dec 01, 2021Observed: 2.15 ft at 9:30AM Dec 01, 2021Observed: 2.15 ft at 9:45AM Dec 01, 2021Observed: 2.15 ft at 10:00AM Dec 01, 2021Observed: 2.15 ft at 10:15AM Dec 01, 2021Observed: 2.15 ft at 10:30AM Dec 01, 2021Observed: 2.15 ft at 10:45AM Dec 01, 2021Observed: 2.15 ft at 11:00AM Dec 01, 2021Observed: 2.15 ft at 11:15AM Dec 01, 2021Observed: 2.15 ft at 11:30AM Dec 01, 2021Observed: 2.15 ft at 11:45AM Dec 01, 2021Observed: 2.15 ft at 12:00PM Dec 01, 2021Observed: 2.15 ft at 12:15PM Dec 01, 2021Observed: 2.15 ft at 12:30PM Dec 01, 2021Observed: 2.15 ft at 12:45PM Dec 01, 2021Observed: 2.15 ft at 1:00PM Dec 01, 2021Observed: 2.15 ft at 1:15PM Dec 01, 2021Observed: 2.15 ft at 1:30PM Dec 01, 2021Observed: 2.15 ft at 1:45PM Dec 01, 2021Observed: 2.15 ft at 2:00PM Dec 01, 2021Observed: 2.15 ft at 2:15PM Dec 01, 2021Observed: 2.15 ft at 2:30PM Dec 01, 2021Observed: 2.14 ft at 2:45PM Dec 01, 2021Observed: 2.15 ft at 3:00PM Dec 01, 2021Observed: 2.15 ft at 3:15PM Dec 01, 2021Observed: 2.15 ft at 3:30PM Dec 01, 2021Observed: 2.15 ft at 3:45PM Dec 01, 2021Observed: 2.15 ft at 4:00PM Dec 01, 2021Observed: 2.15 ft at 4:15PM Dec 01, 2021Observed: 2.15 ft at 4:30PM Dec 01, 2021Observed: 2.15 ft at 4:45PM Dec 01, 2021Observed: 2.15 ft at 5:00PM Dec 01, 2021Observed: 2.14 ft at 5:15PM Dec 01, 2021Observed: 2.14 ft at 5:30PM Dec 01, 2021Observed: 2.15 ft at 5:45PM Dec 01, 2021Observed: 2.15 ft at 6:00PM Dec 01, 2021Observed: 2.15 ft at 6:15PM Dec 01, 2021Observed: 2.15 ft at 6:30PM Dec 01, 2021Observed: 2.15 ft at 6:45PM Dec 01, 2021Observed: 2.15 ft at 7:00PM Dec 01, 2021Observed: 2.15 ft at 7:15PM Dec 01, 2021Observed: 2.14 ft at 7:30PM Dec 01, 2021Observed: 2.14 ft at 7:45PM Dec 01, 2021Observed: 2.15 ft at 8:00PM Dec 01, 2021Observed: 2.15 ft at 8:15PM Dec 01, 2021Observed: 2.15 ft at 8:30PM Dec 01, 2021Observed: 2.15 ft at 8:45PM Dec 01, 2021Observed: 2.15 ft at 9:00PM Dec 01, 2021Observed: 2.14 ft at 9:15PM Dec 01, 2021Observed: 2.14 ft at 9:30PM Dec 01, 2021Observed: 2.14 ft at 9:45PM Dec 01, 2021Observed: 2.14 ft at 10:00PM Dec 01, 2021Observed: 2.14 ft at 10:15PM Dec 01, 2021US Geological SurveyCSTT2(plotting HGIRG) Graph Created (10:45PM Dec 1, 2021)ObservedLatest observed value: 2.14 ft at 10:15 PM CST 1-Dec-2021. Flood Stage is 15 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 12 hours into the future from the forecast issuance time.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Rio Grande at Castolon are issued as needed during times of high water, but are not routinely available.

Vertical datum height surveyed by the USGS

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Locations
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 19
Flood Stage: 15
Action Stage: 13
Low Stage (in feet): -9999

Historic Crests
(1) 24.70 ft on 09/27/1958
(2) 24.60 ft on 10/03/1932
(3) 23.25 ft on 09/22/2008
(4) 21.30 ft on 09/30/1978
(5) 21.15 ft on 09/21/1974
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 17.10 ft on 09/09/2020
(2) 16.23 ft on 05/11/2020
(3) 15.26 ft on 08/25/2017
(4) 15.09 ft on 08/21/2017
(5) 15.32 ft on 08/21/2017
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:15
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
24.7 the river reaches record stage (1978), and results in major flooding of Cottonwood Campground. All area roads are submerged.
19 the river reaches moderate flood stage, and begins flooding Cottonwood Campground. The river inundates the restrooms upstream at Santa Elena Canyon parking lot. The river begins to close all area roads.
15 the river reaches minor flood stage, and lowland flooding begins. The river begins to flood the road between Santa Elena Canyon and Cottonwood Campground in Big Bend National Park. The river begins to flood the parking lot at Santa Elena Canyon, and cut off the nature trail into the canyon. Campers in Cottonwood Campground need to prepare for possible evacuations.
13 the river reaches bankfull, and no significant damage is expected.
About This Location Collapse

Latitude: 29.137778° N, Longitude: 103.524444° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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 3000 ft 3015 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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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
Midland/Odessa Weather Forecast Office
2500 Challenger Drive
Midland, TX 79706
(432) 563-5006
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