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Hydrograph River at a Glance Download
Pedernales River at Fredericksburg Stage (ft)Flow (cfs)Observed: 5.25 ft at 5:00PM Apr 20, 2024Observed: 5.25 ft at 6:00PM Apr 20, 2024Observed: 5.25 ft at 7:00PM Apr 20, 2024Observed: 5.25 ft at 8:00PM Apr 20, 2024Observed: 5.29 ft at 9:00PM Apr 20, 2024Observed: 5.3 ft at 10:00PM Apr 20, 2024Observed: 5.3 ft at 11:00PM Apr 20, 2024Observed: 5.31 ft at 12:00AM Apr 21, 2024Observed: 5.31 ft at 1:00AM Apr 21, 2024Observed: 5.32 ft at 2:00AM Apr 21, 2024Observed: 5.32 ft at 3:00AM Apr 21, 2024Observed: 5.32 ft at 4:00AM Apr 21, 2024Observed: 5.33 ft at 5:00AM Apr 21, 2024Observed: 5.34 ft at 6:00AM Apr 21, 2024Observed: 5.35 ft at 7:00AM Apr 21, 2024Observed: 5.37 ft at 8:00AM Apr 21, 2024Observed: 5.38 ft at 9:00AM Apr 21, 2024Observed: 5.39 ft at 10:00AM Apr 21, 2024Observed: 5.41 ft at 11:00AM Apr 21, 2024Observed: 5.41 ft at 12:00PM Apr 21, 2024Observed: 5.43 ft at 1:00PM Apr 21, 2024Observed: 5.42 ft at 2:00PM Apr 21, 2024Highest Observation: 5.44 ft at 3:00PM Apr 21, 2024Highest Observation: 5.44 ft at 4:00PM Apr 21, 2024Observed: 5.43 ft at 5:00PM Apr 21, 2024Observed: 5.43 ft at 6:00PM Apr 21, 2024Observed: 5.43 ft at 7:00PM Apr 21, 2024Observed: 5.42 ft at 8:00PM Apr 21, 2024Observed: 5.42 ft at 9:00PM Apr 21, 2024Observed: 5.41 ft at 10:00PM Apr 21, 2024Observed: 5.41 ft at 11:00PM Apr 21, 2024Observed: 5.41 ft at 12:00AM Apr 22, 2024Observed: 5.4 ft at 1:00AM Apr 22, 2024Observed: 5.4 ft at 2:00AM Apr 22, 2024Observed: 5.4 ft at 3:00AM Apr 22, 2024Observed: 5.4 ft at 4:00AM Apr 22, 2024Observed: 5.4 ft at 5:00AM Apr 22, 2024Observed: 5.4 ft at 6:00AM Apr 22, 2024Observed: 5.39 ft at 7:00AM Apr 22, 2024Observed: 5.4 ft at 9:00AM Apr 22, 2024Observed: 5.39 ft at 10:00AM Apr 22, 2024Observed: 5.39 ft at 11:00AM Apr 22, 2024Observed: 5.39 ft at 12:00PM Apr 22, 2024Observed: 5.4 ft at 1:00PM Apr 22, 2024Observed: 5.39 ft at 2:00PM Apr 22, 2024Observed: 5.39 ft at 3:00PM Apr 22, 2024Observed: 5.38 ft at 4:00PM Apr 22, 2024Observed: 5.38 ft at 5:00PM Apr 22, 2024Observed: 5.38 ft at 6:00PM Apr 22, 2024Observed: 5.38 ft at 7:00PM Apr 22, 2024Observed: 5.38 ft at 8:00PM Apr 22, 2024Observed: 5.37 ft at 9:00PM Apr 22, 2024Observed: 5.37 ft at 10:00PM Apr 22, 2024Observed: 5.37 ft at 11:00PM Apr 22, 2024Observed: 5.36 ft at 12:00AM Apr 23, 2024Observed: 5.37 ft at 1:00AM Apr 23, 2024Observed: 5.36 ft at 2:00AM Apr 23, 2024Observed: 5.36 ft at 3:00AM Apr 23, 2024Observed: 5.36 ft at 4:00AM Apr 23, 2024Observed: 5.36 ft at 5:00AM Apr 23, 2024Observed: 5.36 ft at 6:00AM Apr 23, 2024Observed: 5.35 ft at 7:00AM Apr 23, 2024Observed: 5.35 ft at 8:00AM Apr 23, 2024Observed: 5.36 ft at 9:00AM Apr 23, 2024Observed: 5.35 ft at 10:00AM Apr 23, 2024Observed: 5.36 ft at 11:00AM Apr 23, 2024Observed: 5.36 ft at 12:00PM Apr 23, 2024Observed: 5.36 ft at 1:00PM Apr 23, 2024Observed: 5.36 ft at 2:00PM Apr 23, 2024Observed: 5.36 ft at 3:00PM Apr 23, 2024Observed: 5.35 ft at 4:00PM Apr 23, 2024Observed: 5.35 ft at 5:00PM Apr 23, 2024Observed: 5.35 ft at 6:00PM Apr 23, 2024Observed: 5.35 ft at 7:00PM Apr 23, 2024Observed: 5.35 ft at 8:00PM Apr 23, 2024Observed: 5.35 ft at 9:00PM Apr 23, 2024Observed: 5.35 ft at 10:00PM Apr 23, 2024Observed: 5.34 ft at 11:00PM Apr 23, 2024Observed: 5.35 ft at 12:00AM Apr 24, 2024Observed: 5.34 ft at 1:00AM Apr 24, 2024Observed: 5.34 ft at 2:00AM Apr 24, 2024Observed: 5.35 ft at 3:00AM Apr 24, 2024Observed: 5.35 ft at 4:00AM Apr 24, 2024Observed: 5.35 ft at 5:00AM Apr 24, 2024Observed: 5.34 ft at 6:00AM Apr 24, 2024Observed: 5.34 ft at 7:00AM Apr 24, 2024Observed: 5.35 ft at 8:00AM Apr 24, 2024Observed: 5.35 ft at 9:00AM Apr 24, 2024Observed: 5.35 ft at 10:00AM Apr 24, 2024Observed: 5.36 ft at 11:00AM Apr 24, 2024Observed: 5.35 ft at 12:00PM Apr 24, 2024Observed: 5.35 ft at 1:00PM Apr 24, 2024Observed: 5.35 ft at 2:00PM Apr 24, 2024Observed: 5.35 ft at 3:00PM Apr 24, 2024Observed: 5.35 ft at 4:00PM Apr 24, 2024Observed: 5.35 ft at 5:00PM Apr 24, 2024Observed: 5.35 ft at 6:00PM Apr 24, 2024Observed: 5.35 ft at 7:00PM Apr 24, 2024Observed: 5.35 ft at 8:00PM Apr 24, 2024Observed: 5.35 ft at 9:00PM Apr 24, 2024Observed: 5.35 ft at 10:00PM Apr 24, 2024Observed: 5.34 ft at 11:00PM Apr 24, 2024Observed: 5.34 ft at 12:00AM Apr 25, 2024Observed: 5.34 ft at 1:00AM Apr 25, 2024Observed: 5.35 ft at 2:00AM Apr 25, 2024Observed: 5.34 ft at 3:00AM Apr 25, 2024Observed: 5.35 ft at 4:00AM Apr 25, 2024Observed: 5.34 ft at 5:00AM Apr 25, 2024Observed: 5.34 ft at 6:00AM Apr 25, 2024Observed: 5.35 ft at 7:00AM Apr 25, 2024Observed: 5.34 ft at 8:00AM Apr 25, 2024Observed: 5.34 ft at 9:00AM Apr 25, 2024Observed: 5.34 ft at 10:00AM Apr 25, 2024Observed: 5.34 ft at 11:00AM Apr 25, 2024Observed: 5.34 ft at 12:00PM Apr 25, 2024Observed: 5.35 ft at 1:00PM Apr 25, 2024Observed: 5.34 ft at 2:00PM Apr 25, 2024Observed: 5.34 ft at 3:00PM Apr 25, 2024Observed: 5.35 ft at 4:00PM Apr 25, 2024USGS--Water Resources of the United StatesFRBT2(plotting HGIRZ) Graph Created (4:34PM Apr 25, 2024)ObservedLatest observed value: 5.35 ft at 4:00 PM CDT 25-Apr-2024. Flood Stage is 22 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NGVD29
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 Pedernales River at Fredericksburg are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge Downstream Gauge - at Johnson City
Flood Categories (in feet)
Major Flood Stage: 32
Moderate Flood Stage: 25
Flood Stage: 22
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 41.60 ft on 08/02/1978
(2) 38.70 ft on 09/01/1979
(3) 34.40 ft on 06/01/1979
(4) 32.09 ft on 12/20/1991
(5) 31.87 ft on 06/22/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 22.59 ft on 10/16/2018
(2) 14.88 ft on 05/29/2016
(3) 11.72 ft on 05/25/2015
(4) 27.40 ft on 07/05/2002
(5) 27.40 ft on 07/05/2002
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
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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
40 Major flooding of primary and secondary roads and bridges in the headwaters above Fredericksburg is very dangerous. The bridge floor of Highway 87 floods. Hundreds of livstock are cut off and potentially drowned Major flooding downstream in LBJ National Park damages the Junction School House, the Jordan House, fencing, signs and roads.
37 Flow reaches the slab elevation of the lowest buildings below the gauge and the south approach to the Highway 87 bridge. Secondary and primary roads and bridges flood in the headwaters above Fredericksburg. Major flooding downstream in LBJ National Park near Stonewall damages buildings, signs, fencing and roads. Hundreds of livestock are cut off and potentially drowned.
36 Major flooding is near the USGS 1:25 year level. Lowest buildings near Highway 87 are threatened as well as the Highway 87 bridge approaches. Major damage occurs downsteam at LBJ National Park to signs, fences, roads and the Junction School. Widepread scouring of roads and bridges occurs from the headwaters to below Stonewall.
32 Widespread major flooding of secondary and primary roads, low bridges and crossings in the headwaters above Fredericksburg make them very dangerous. Destructive flooding at LBJ National Park downstream will be ten feet over the Park Road 49 bridge at LBJ National Park. Many park signs and fences are destroyed and park roads damaged. This flow exceeds the USGS 1:10 year flood level.
29 Moderate lowland flooding inundates secondary roads and bridges from the headwaters above Harper to below Stonewall. Fences and signs are destroyed in LBJ National Park at Stonewall as flow is well into the flood plain and many feet over the Park Road 49 bridge.
27 Moderate lowland flooding is near the USGS 1:5 year level. Secondary roads and bridges from the headwaters above Harper to below Stonewall are flooded and dangerous. Significant damage to fences, signs, and roads occurs downstream in LBJ National Park near Stonewall.
25 Moderate lowland flooding covers many secondary roads and bridges from the headwaters to Stonewall making them very dangerous to motorists. Low areas of LBJ National Park and the Park Road 49 bridge are flooded.
22 Minor lowland flooding floods secondary roads and bridges from the headwaters downstream to below LBJ National Park. The Park Road 49 bridge in LBJ National Park floods. Fencing and signs are damaged in LBJ National Park.
16.6 Flow exceeds the banks and is near the USGS 1:2 year level.
15 Flow exceeds banks into lowest areas of the flood plain.
12 Flow exceeds lowest areas of the banks.
About This Location Collapse

Latitude: 30.220278° N, Longitude: 98.869444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 22 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 1564.96 ft 1586.96 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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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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