Advanced Hydrologic Prediction Service: Austin/San Antonio: San Gabriel River at Georgetown South Fork
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Advanced Hydrologic Prediction Service

San Gabriel River at Georgetown South Fork, TX (GETT2)

Data Type




Inundation Levels
NAVD88

731.343.3
730.342.3
729.341.3
728.340.3
727.339.3
726.338.3
725.337.3
724.336.3
723.335.3
722.334.3
721.333.3
720.332.3
719.331.3
718.330.3
717.329.3
716.328.3
715.327.3
714.326.3

Major Flooding Begins

713.325.3
712.324.3
711.323.3
710.322.3
709.321.3
708.320.3
707.319.3
706.318.3
705.317.3
704.316.3
703.315.3
702.314.3
701.313.3

Moderate Flooding Begins

700.312.3
699.311.3
698.310.3
697.39.3

Flooding Begins



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Weather Forecast Office Austin/San Antonio, TX West Gulf River Forecast Center

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Current Stage: 2.28 ft at 20:15 UTC 01/15
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

North Arrow Flood Categories (in feet)
Major Flood Stage:26
Moderate Flood Stage:13
Flood Stage:9
Action Stage:5
Below Flood Stage:

USGS Gauge Location USGS Gauge Location

Extent of Inundation Study Boundaries Extent of Inundation Study Boundaries

Historical Crests
(1) 41.00 ft on 04/24/1956
(2) 31.65 ft on 06/27/2007
(3) 27.06 ft on 11/15/2001
(4) 24.60 ft on 09/03/1981
(5) 19.94 ft on 02/03/1986
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Impacts Collapse
26.0 MAJOR LOWLAND FLOODING CLOSES MANY STREETS AND ROADS. MUCH OF THE CITY PARK DOWNSTREAM FLOODS. LOWEST HOMES ABOVE GEORGETOWN TO GRANGER LAKE ARE THREATENED
23.0 MODERATE LOWLAND FLOODING INUNDATES MANY SECONDARY AND PRIMARY ROADS NEAR THE SAN GABRIEL RIVER. FACILITIES AND EQUIPMENT WELL INTO THE FLOOD PLAIN ARE FLOODED. RESIDENTS OF LOWEST HOMES IN THE FLOOD PLAIN ABOVE GEORGETOWN TO GRANGER LAKE SHOULD MONITOR NOAA WEATHER RADIO FOR DEVELOPING HEAVY RAIN AND FLOOD CONDITIONS
20.0 MODERATE LOWLAND FLOODING CLOSES SECONDARY AND PRIMARY ROADS NEAR THE RIVER. THE CITY PARK IS SEVERELY FLOODED. LIVESTOCK AND EQUIPMENT SHOULD BE MOVED FROM THE FLOOD PLAIN FROM THE HEADWATERS TO GRANGER LAKE
17.0 MODERATE LOWLAND FLOODING INUNDATES MANY SECONDARY AND PRIMARY ROADS NEAR THE SAN GABRIEL RIVER FROM THE HEADWATERS OF THE SOUTH FORK TO GRANGER LAKE. THE CITY PARK IN GEORGETOWN AND ANY FACILITIES AND EQUIPMENT IN THE FLOOD PLAIN ARE DAMAGED
13.0 MODERATE LOWLAND FLOODING INUNDATES SECONDARY ROADS AND LOW BRIDGES. FLOW ENTERS THE LOWEST AREAS OF THE CITY PARK
9.0 MINOR LOWLAND FLOODING REACHES LOW AREAS OF THE FLOOD PLAIN WITH NO SIGNIFICANT DAMAGE. LOWEST AREAS OF THE CITY PARK DOWNTOWN ARE FLOODED
5.0 FLOW EXCEEDS LOWEST SECTIONS OF THE BANKS

Other Data Sources:
U.S. Geological Survey (USGS) Data and Site Info for Georgetown South Fork

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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 Rd.
New Braunfels, TX 78130
(830) 606-3617
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Page last modified: 18-Sep-2008 4:37 PM
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