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Hydrograph River at a Glance Download
Pedernales River at Johnson City Stage (ft)Flow (cfs)Highest Observation: 9.93 ft at 12:00AM Aug 29, 2014Highest Observation: 9.93 ft at 1:00AM Aug 29, 2014Highest Observation: 9.93 ft at 2:00AM Aug 29, 2014Highest Observation: 9.93 ft at 3:00AM Aug 29, 2014Highest Observation: 9.93 ft at 4:00AM Aug 29, 2014Highest Observation: 9.93 ft at 5:00AM Aug 29, 2014Highest Observation: 9.93 ft at 6:00AM Aug 29, 2014Highest Observation: 9.93 ft at 7:00AM Aug 29, 2014Highest Observation: 9.93 ft at 8:00AM Aug 29, 2014Highest Observation: 9.93 ft at 9:00AM Aug 29, 2014Highest Observation: 9.93 ft at 10:00AM Aug 29, 2014Highest Observation: 9.93 ft at 11:00AM Aug 29, 2014Highest Observation: 9.93 ft at 12:00PM Aug 29, 2014Highest Observation: 9.93 ft at 1:00PM Aug 29, 2014Highest Observation: 9.93 ft at 2:00PM Aug 29, 2014Observed: 9.92 ft at 3:00PM Aug 29, 2014Observed: 9.92 ft at 4:00PM Aug 29, 2014Observed: 9.9 ft at 5:00PM Aug 29, 2014Highest Observation: 9.93 ft at 6:00PM Aug 29, 2014Observed: 9.92 ft at 7:00PM Aug 29, 2014Observed: 9.92 ft at 8:00PM Aug 29, 2014Observed: 9.92 ft at 9:00PM Aug 29, 2014Observed: 9.91 ft at 10:00PM Aug 29, 2014Observed: 9.92 ft at 11:00PM Aug 29, 2014Observed: 9.92 ft at 12:00AM Aug 30, 2014Observed: 9.92 ft at 1:00AM Aug 30, 2014Observed: 9.92 ft at 2:00AM Aug 30, 2014Observed: 9.92 ft at 3:00AM Aug 30, 2014Observed: 9.92 ft at 4:00AM Aug 30, 2014Observed: 9.92 ft at 5:00AM Aug 30, 2014Observed: 9.92 ft at 6:00AM Aug 30, 2014Observed: 9.92 ft at 7:00AM Aug 30, 2014Highest Observation: 9.93 ft at 8:00AM Aug 30, 2014Observed: 9.92 ft at 9:00AM Aug 30, 2014Observed: 9.92 ft at 10:00AM Aug 30, 2014Observed: 9.92 ft at 11:00AM Aug 30, 2014Observed: 9.92 ft at 12:00PM Aug 30, 2014Observed: 9.92 ft at 1:00PM Aug 30, 2014Observed: 9.92 ft at 2:00PM Aug 30, 2014Observed: 9.92 ft at 3:00PM Aug 30, 2014Observed: 9.92 ft at 4:00PM Aug 30, 2014Observed: 9.91 ft at 5:00PM Aug 30, 2014Observed: 9.91 ft at 6:00PM Aug 30, 2014Observed: 9.91 ft at 7:00PM Aug 30, 2014Observed: 9.91 ft at 8:00PM Aug 30, 2014Observed: 9.91 ft at 9:00PM Aug 30, 2014Observed: 9.91 ft at 10:00PM Aug 30, 2014Observed: 9.92 ft at 11:00PM Aug 30, 2014Observed: 9.9 ft at 12:00AM Aug 31, 2014Observed: 9.91 ft at 1:00AM Aug 31, 2014Observed: 9.91 ft at 2:00AM Aug 31, 2014Observed: 9.91 ft at 3:00AM Aug 31, 2014Observed: 9.9 ft at 4:00AM Aug 31, 2014Observed: 9.91 ft at 5:00AM Aug 31, 2014Observed: 9.91 ft at 6:00AM Aug 31, 2014Observed: 9.91 ft at 7:00AM Aug 31, 2014Observed: 9.91 ft at 8:00AM Aug 31, 2014Observed: 9.91 ft at 9:00AM Aug 31, 2014Observed: 9.9 ft at 10:00AM Aug 31, 2014Observed: 9.9 ft at 11:00AM Aug 31, 2014Observed: 9.91 ft at 12:00PM Aug 31, 2014Observed: 9.9 ft at 1:00PM Aug 31, 2014Observed: 9.91 ft at 2:00PM Aug 31, 2014Observed: 9.91 ft at 3:00PM Aug 31, 2014Observed: 9.9 ft at 4:00PM Aug 31, 2014Observed: 9.89 ft at 5:00PM Aug 31, 2014Observed: 9.88 ft at 6:00PM Aug 31, 2014Observed: 9.89 ft at 7:00PM Aug 31, 2014Observed: 9.89 ft at 8:00PM Aug 31, 2014Observed: 9.89 ft at 9:00PM Aug 31, 2014Observed: 9.89 ft at 10:00PM Aug 31, 2014Observed: 9.88 ft at 11:00PM Aug 31, 2014Observed: 9.89 ft at 12:00AM Sep 01, 2014Observed: 9.89 ft at 1:00AM Sep 01, 2014Observed: 9.9 ft at 2:00AM Sep 01, 2014Observed: 9.89 ft at 3:00AM Sep 01, 2014Observed: 9.89 ft at 4:00AM Sep 01, 2014Observed: 9.89 ft at 5:00AM Sep 01, 2014Observed: 9.9 ft at 6:00AM Sep 01, 2014Observed: 9.89 ft at 7:00AM Sep 01, 2014Observed: 9.89 ft at 8:00AM Sep 01, 2014Observed: 9.89 ft at 9:00AM Sep 01, 2014Observed: 9.89 ft at 10:00AM Sep 01, 2014Observed: 9.89 ft at 11:00AM Sep 01, 2014Observed: 9.89 ft at 12:00PM Sep 01, 2014Observed: 9.89 ft at 1:00PM Sep 01, 2014Observed: 9.88 ft at 2:00PM Sep 01, 2014Observed: 9.88 ft at 3:00PM Sep 01, 2014Observed: 9.87 ft at 4:00PM Sep 01, 2014Observed: 9.87 ft at 5:00PM Sep 01, 2014Observed: 9.87 ft at 6:00PM Sep 01, 2014Observed: 9.87 ft at 7:00PM Sep 01, 2014Observed: 9.87 ft at 8:00PM Sep 01, 2014Observed: 9.87 ft at 9:00PM Sep 01, 2014Observed: 9.87 ft at 10:00PM Sep 01, 2014Observed: 9.87 ft at 11:00PM Sep 01, 2014Observed: 9.87 ft at 12:00AM Sep 02, 2014Observed: 9.87 ft at 1:00AM Sep 02, 2014Observed: 9.87 ft at 2:00AM Sep 02, 2014Observed: 9.87 ft at 3:00AM Sep 02, 2014Observed: 9.88 ft at 4:00AM Sep 02, 2014Observed: 9.88 ft at 5:00AM Sep 02, 2014Observed: 9.87 ft at 6:00AM Sep 02, 2014Observed: 9.87 ft at 7:00AM Sep 02, 2014Observed: 9.88 ft at 8:00AM Sep 02, 2014Observed: 9.87 ft at 9:00AM Sep 02, 2014Observed: 9.88 ft at 10:00AM Sep 02, 2014Observed: 9.87 ft at 11:00AM Sep 02, 2014Observed: 9.87 ft at 12:00PM Sep 02, 2014Observed: 9.87 ft at 1:00PM Sep 02, 2014Observed: 9.88 ft at 2:00PM Sep 02, 2014Observed: 9.86 ft at 3:00PM Sep 02, 2014Observed: 9.86 ft at 4:00PM Sep 02, 2014Observed: 9.87 ft at 5:00PM Sep 02, 2014Observed: 9.85 ft at 6:00PM Sep 02, 2014Observed: 9.85 ft at 7:00PM Sep 02, 2014Observed: 9.85 ft at 8:00PM Sep 02, 2014Observed: 9.86 ft at 9:00PM Sep 02, 2014Observed: 9.85 ft at 10:00PM Sep 02, 2014Observed: 9.84 ft at 11:00PM Sep 02, 2014USGS--Water Resources of the United StatesJOCT2(plotting HGIRZ) Graph Created (11:32PM Sep 2, 2014)ObservedLatest observed value: 9.84 ft at 11:00 PM CDT 2-Sep-2014. Flood Stage is 14 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Pedernales River at Johnson City are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - at Fredericksburg Upstream Gauge
Flood Categories (in feet)
Major Flood Stage:19
Moderate Flood Stage:17
Flood Stage:14
Action Stage:13

Historical Crests
(1) 42.50 ft on 09/11/1952
(2) 33.00 ft on 07/03/1869
(3) 26.10 ft on 10/04/1959
(4) 26.10 ft on 08/30/1944
(5) 26.00 ft on 07/04/2002
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(P): Preliminary values subject to further review.

Low Water Records
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 Flow reaches the slab elevation of the lowest homes in the pedernales river flood plain near johnson city, the rodeo grounds and the south approach of highway 281 - an rv park just below highway 281 has up to six feet of water over the lowest sites - widespread lowland flooding can cut off and drown hundreds of livestock - much of pedernales falls state park floods
37 Several feet of turbulent water is flowing through low areas of an rv park below hwy 281 on the right bank - many roads and bridges in the flood plain are life threatening - fencing and roads are damaged or destroyed - much of pedernales falls state park is flooded
34 Flow is to the lowest trailer sites of an rv park just below highway 281 near johnson city - hundreds of cattle can be cut off and drowned in the flood plain - low areas of pedernales falls state park downstream flood - roads and bridges near the river are extremely dangerous - flow is approaching the rodeo grounds - near the usgs 1:100 year flood level
30 Flow is within four feet of an rv park in the northeast part of johnson city just below highway 281 on the left bank - lowest camp sites are at thirty four feet gauge height - hundreds of livestock in the flood plain can be cut off and drowned - roads and low bridges near the river flood - low sections of pedernales falls state park downstream are under turbulent water and very dangerous - exceeds the usgs 1:50 year flood
28 Secondary and primary roads and bridges are severely flooded in the flood plain - fencing and roads are damaged or destroyed - low areas of pedernales state park downstream are severely flooded - exceeds usgs 1:25 year flood
25 Extensive damage occurs to roads, bridges, fences and signs in the flood plain below stonewall to lake travis. Lower sections of pedernales falls state park flood - roads and low bridges near the river are flooded and dangerous to motorists - exceeds usgs 1:10 year flood
22 Secondary roads, bridges and crossings are dangerously flooded near the pedernales river - low areas of pedernales falls state park are flooded and dangerous - fencing and roads are damaged or destroyed in the flood plain
19 Major flooding makes secondary and primary roads below stonewall to lake travis very dangerous - low park areas downstream in pedernales falls state park flood
17 Moderate lowland flooding makes secondary roads, bridges and low crossings very dangerous - swimmers and recreationists should move from the flood plain downstream in pedernales falls state park - near the usgs 1:2 year flood
14 Minor lowland flooding reaches secondary roads, crossings and low bridges - low areas of lbj national park upstream are flooded - swimmers and recreationists should leave the river downstream in pedernales falls state park
13 Low water crossings upstream flood
About This Location Collapse

Latitude: 30.291667° N, Longitude: 98.399167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 14 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 1096.7 ft 1110.7 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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Page last modified: 27-Aug-2014 7:11 PM
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