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Preliminary Report for the July 2002 Floods in Texas

Last updated: Monday, July 05, 2005

On June 30, 2002, a low-pressure system migrating westward from Florida combined with a flow of deep tropical moisture from the Gulf of Mexico and moved over southern Texas. The system hit a wall of high pressure and stalled over the central and south-central parts of the State. For 8 days, the storm system continued to draw moisture from the Gulf, which triggered several massive storms throughout much of the area. As much as 35 inches of rainfall fell during the event. Additional information from the National Weather Service about the storm is online at http://www.noaanews.noaa.gov/stories/s935.htm

The floods caused at least nine deaths and damage to about 48,000 homes. Nearly 250 flood rescue calls were reported, more than 130 roads were closed, and thousands of homes and businesses lost electrical power and telephone service. Thirty-four counties have been identified by the Federal Emergency Management Agency (FEMA) as Federal Declared Disaster areas--32 counties are eligible for individual assistance and 20 counties for individual and public assistance. Additional information from FEMA about the disaster is online at http://www.fema.gov/news/event.fema?id=88. Emergency managers have not yet assessed the total cost of damages, but the storm is being compared with October 1998 floods that claimed 60 lives and caused about $1.5 billion in damages to the same region.

The storms produced large volumes of runoff and as many as four flood peaks at each of many streamflow-gaging stations in the Brazos, Colorado, and Guadalupe River Basins. The U.S. Geological Survey reports gage-height and discharge data for over 400 streamflow-gaging stations in Texas at http://waterdata.usgs.gov/tx/nwis/current?type=flow. The largest peak streamflow from the July 2002 storms represents the highest known peak gage height and discharge for 12 of the stations. The large volumes of runoff not only resulted in surface flooding, but also recharged the Edwards Aquifer.

The following data table s presents preliminary determinations of the flood data. These data might be revised and additional data added to the table as they become available. The data are not yet finalized and thus subject to revision.

View the Reservoir Data Table
Streamflow Data

Station No.
Station Name Foot note Historical peak data Data from Event
Year record began Date Gage height (ft) Stream-flow (ft³/s) Date Gage height (ft³/s) Stream-flow (cfs)
Brazos River Basin
08083230 Clear Fk Brazos Rv nr Noodle, TX   2002 -- -- -- Jul.08,2002 10.82 --
08083420 Cat Claw Ck at Abilene, TX   1971 Oct.17,2000 9.5 -- Jul.07,2002 9.55 --
08083480 Cedar Ck at IH 20, Abilene, TX   2000 Oct.17,2000 7.72 -- Jul.06,2002 8.05 5,110
Colorado River Basin
08133900 Chalk Ck nr Water Valley, TX   2002 -- -- -- Jul.04,2002 8.1 --
08143600 Pecan Bayou nr Mullin, TX   1967 Apr.27,1990 42.15 38,300 Jul.09,2002 37.61 27,500
08152900 Pedernales Rv nr Fredericksburg, TX   1907 Aug.02,1928 41.6 -- Jul.05,2002 27.4 34,600
08153500 Pedernales Rv nr Johnson City, TX   1939 Sep.11,1952 42.5 441,000 Jul.04,2002 25.8 105,000
08155200 Barton Ck at SH 71 nr Oak Hill, TX   1978 Nov.15,2001 21.03 20,600 Jul.02,2002 23.76 --
08155240 Barton Ck at Lost Ck Blvd nr Austin, TX   1989 Dec.21,1991 12.9 16,400 Jul.02,2002 16.16 --
08155300 Barton Ck at Loop 360, Austin, TX   1929 May.28,1929 -- 39,400 Jul.02,2002 17.87 --
08155400 Barton Ck abv Barton Spgs at Austin, TX   1998 Nov.16,2001 18.2 12,900 Jul.02,2002 16.49 --
08158600 Walnut Ck at Webberville Rd, Austin, TX   1891 May.25,1981 27.24 14,300 Jul.02,2002 25.13 10,500
08158700 Onion Ck nr Driftwood, TX   1979 Oct.17,1998 25.1 15,800 Jul.05,2002 20.2 --
08158810 Bear Ck bl FM 1826 nr Driftwood, TX   1924 Jun.09,1939 16.2 14,200 Jul.02,2002 13.82 9,430
08158840 Slaughter Ck at FM 1826 nr Austin, TX 1 1978 -- 10.79 6,330 Jul.02,2002 8.93 2,819
08159000 Onion Ck at US Hwy 183, Austin, TX   1869 Sep.09,1921 -- 138,000 Jul.02,2002 23.8 17,500
Guadalupe River Basin
08166140 Guadalupe Rv abv Bear Ck at Kerrville, TX   1900 Jul.02,1932 34.01 -- Jul.05,2002 16.35 35,100
08166200 Guadalupe Rv at Kerrville, TX   1932 Jul.02,1932 39. 196,000 Jul.05,2002 14.56 35,900
08167000 Guadalupe Rv at Comfort, TX   1848 Aug.02,1978 40.9 240,000 Jul.04,2002 31.33 128,000
08167500 Guadalupe Rv nr Spring Branch, TX   1859 Aug.03,1869 53. -- Jul.03,2002 41.6 --
08167800 Guadalupe Rv at Sattler, TX 2 1904 -- 39. -- Jul.06,2002 35.55 --
08168500 Guadalupe Rv abv Comal Rv at New Braunfels, TX   1845 Jul.08,1864 38. 142,000 Jul.06,2002 29.44 --
08169000 Comal Rv at New Braunfels, TX   1869 Oct.17,1870 37.65 -- Jul.06,2002 23.86 --
08169500 Guadalupe Rv at New Braunfels, TX   1845 Aug.01,1869 39.5 56,600 Jul.06,2002 29.66 --
08170500 San Marcos Rv at San Marcos, TX   1995 Oct.17,1998 21.29 21,500 Jul.08,2002 10.77 2,470
08171000 Blanco Rv at Wimberley, TX   1869 May.28,1929 33.3 113,000 Jul.05,2002 27.45 --
08171300 Blanco Rv nr Kyle, TX   1882 May.01,1929 40. 139,000 Jul.05,2002 29.75 --
08172000 San Marcos Rv at Luling, TX   1859 Oct.18,1998 41.85 206,000 Jul.06,2002 33.73 33,000
08173900 Guadalupe Rv at Gonzales, TX   1929 Oct.19,1998 50.44 340,000 Jul.07,2002 42.24 --
08175800 Guadalupe Rv at Cuero, TX   1900 Oct.20,1998 50.35 473,000 Jul.09,2002 36.96 --
08176500 Guadalupe Rv at Victoria, TX   1833 Oct.20,1998 34.04 466,000 Jul.10,2002 28.4 --
08177520 Guadalupe Rv nr Bloomington, TX 3 1998 Oct.20,1998 33.92 -- Jul.12,2002 27.84 --
08194200 San Casimiro Ck nr Freer, TX   1946 Oct.17,1971 26.87 82,000 Jul.16,2002 17.44 --
San Antonio River Basin
08177700 Olmos Ck at Dresden Dr, San Antonio, TX 4 1935 -- 14.82 19,700 Jul.01,2002 12.97 15,700
08178000 San Antonio Rv at San Antonio, TX 5 1915 Sep.10,1921 20.14 15,300 Jul.01,2002 12.79 --
08178585 Salado Ck at Wilderness Rd at San Antonio, TX   1998 Oct.18,1998 13.55 5,000 Jul.01,2002 12.81 3,439
08178700 Salado Ck at Loop 410 at San Antonio, TX   1960 Oct.17,1998 22.4 64,400 Jul.01,2002 19.16 43,600
08178800 Salado Ck at Loop 13 at San Antonio, TX   1960 Oct.17,1998 34.07 47,800 Jul.05,2002 29.79 --
08178880 Medina Rv at Bandera, TX   1880 Aug.02,1978 46.62 -- Jul.04,2002 38.91 --
08180700 Medina Rv nr Macdona, TX   1981 May.30,1987 20.58 36,800 Jul.06,2002 24.7 --
08180800 Medina Rv nr Somerset, TX   1971 Jul.17,1973 29.39 30,500 Jul.06,2002 42.19 --
08181400 Helotes Ck at Helotes, TX   1968 Oct.18,1998 15.21 12,600 Jul.02,2002 13.74 --
08181480 Leon Ck at IH 35 at San Antonio, TX   1985 Oct.17,1998 29.31 93,300 Jul.02,2002 27.2 45,200
08181500 Medina Rv at San Antonio, TX   1939 Oct.18,1998 49.47 42,400 Jul.04,2002 55.65 --
08181800 San Antonio Rv nr Elmendorf, TX   1962 Oct.18,1998 64.22 75,100 Jul.06,2002 63.16 66,000
08183500 San Antonio Rv nr Falls City, TX   1925 Sep.29,1946 33.8 70,000 Jul.06,2002 34.74 --
08183850 Cibolo Ck at IH 10 abv Boerne, TX   1995 Jun.22,1997 20.82 20,100 Jul.03,2002 14.02 12,100
08185000 Cibolo Ck at Selma, TX   1869 Oct.17,1998 35.37 98,100 Jul.02,2002 23.58 39,000
08186000 Cibolo Ck nr Falls City, TX   1890 Oct.19,1998 39.84 51,200 Jul.04,2002 30.13 20,600
08188500 San Antonio Rv at Goliad, TX 6 1924 Sep.23,1967 53.7 138,000 Jul.09,2002 52.24 --
Nueces River Basin
08193000 Nueces Rv nr Asherton, TX 7 1900 Jun.17,1935 33. -- Jul.05,2002 29.21 --
08194000 Nueces Rv at Cotulla, TX   1879 Jun.18,1935 32.4 82,600 Jul.08,2002 21.54 --
08194500 Nueces Rv nr Tilden, TX   1902 Sep.24,1967 26.57 76,500 Jul.16,2002 23.57 33,700
08195000 Frio Rv at Concan, TX   1869 Jul.01,1932 34.44 162,000 Jul.02,2002 31.23 --
08196000 Dry Frio Rv nr Reagan Wells, TX 8 1875 -- 33. -- Jul.02,2002 27.02 --
08197500 Frio Rv bl Dry Frio Rv nr Uvalde, TX 9 1887 -- 35. -- Jul.02,2002 34.8 --
08198000 Sabinal Rv nr Sabinal, TX   1892 Jul.02,1932 33. -- Jul.05,2002 33.74 37,900
08198500 Sabinal Rv at Sabinal, TX   1890 Aug.24,1919 40. -- Jul.05,2002 38.28 --
08201500 Seco Ck at Miller Ranch nr Utopia, TX   1901 Jun.22,1997 17.7 64,900 Jul.05,2002 14.04 36,400
08205500 Frio Rv nr Derby, TX   1860 Jul.04,1932 29.45 230,000 Jul.07,2002 20.06 --
08206600 Frio Rv at Tilden, TX 10 1932 -- 38.44 -- Jul.01,2002 30.06 --
08206700 San Miguel Ck nr Tilden, TX 11 1919 -- 32.6 -- Jul.02,2002 27.57 21,400
08208000 Atascosa Rv at Whitsett, TX   1881 Sep.23,1967 41.3 121,000 Jul.02,2002 28.24 9,660
08210000 Nueces Rv nr Three Rivers, TX 12 1949 Jun.27,1987 37.29 18,300 Jul.16,2002 43.19 --
08211000 Nueces Rv nr Mathis, TX   1888 Sep.24,1967 48.7 138,000 Jul.16,2002 38.13 50,700
08211200 Nueces Rv at Bluntzer, TX   1966 Mar.29,1992 27.18 -- Jul.17,2002 31.78 --
08211500 Nueces Rv at Calallen, TX   1983 Jun.11,1987 9.25 -- Jul.18,2002 12.24 --
08211900 San Fernando Ck at Alice, TX   1965 Sep.12,1971 16.51 26,800 Jul.05,2002 14.35 --

Footnotes:

1: Maximum gage height occurred on June, 11, 1981, and maximum discharge on Dec.20, 1991.

2: A peak of 39-feet occured in July 1932 and June 1935. Day unknown for both events.

3: Gage-height data only at this station.

4: Maximum gage height occurred on Sep. 13, 1978, and maximum discharge occurred on Apr. 5, 1991.

5: Flood record from 1915-1929 and 1940-date.

6: Flood data from 1924-1929 and 1939-date.

7: Peak on June, 30, 1913, also at 33 feet.

8: A peak of 33 feet occurred in 1880. Date unknown.

9: A peak of about 35 feet occurred in 1894. Date unknown.

10: Stage of 38.44 feet occurred in July 1932.

11: Maximum stage since 1919 occurred in 1942.

12: Flow regulated by reseviors since 1949. Post regulation maximum gage height is 46.0 feet, maximum discharge is 85,000 ft 3/s on Sept. 18,1919, which is highest since 1915.





Reservoir Data

Station No.
Station Name Foot note Historical peak data Data from Event
Year reservoir built Date Elev-
ation (ft)
Reservoir storage (ac-ft) Date Elev-
ation (ft)
Storage capacity (ac-ft)
Brazos River Basin
08079700 Lk Alan Henry Res nr Justiceburg, TX   1993 Oct.26,2000 2,211.58 93,310 Jul.08,2002 2,206.8 81,830
08083270 Lk Abilene nr Buffalo Gap, TX   1921 Oct.13,1981 2,016. 8,400 Jul.09,2002 2,006.56 3,100
08083500 Ft Phantom Hill Res nr Nugent, TX 1 1938 May.25,1957 1,639.7 91,000 Jul.10,2002 1,631.27 53,550
08084500 Lk Stamford nr Haskell, TX 2 1953 Aug.15,1978 1,425. 103,700 Jul.10,2002 1,415.89 47,080
08086215 Lk Cisco nr Cisco, TX   1923 -- 1,518. 24,000 Jul.10,2002 1,502.62 12,140
08086600 Lk Daniel nr Breckenridge, TX   1948 Jun.23,1997 1,284.5 17,187 Jul.09,2002 1,262.86 748
08088500 Possum Kingdom Lk nr Graford, TX   1941 Oct.05,1941 1,001. 743,700 Jul.10,2002 998.62 532,500
Colorado River Basin
08143000 Lk Brownwood nr Brownwood, TX 3 1933 Dec.01,1991 1,432.6 203,000 Jul.07,2002 1,432.13 198,065
08148100 LCRA Inks Lk nr Kingsland, TX   1938 Jul.25,1938 902.8 -- Jul.10,2002 891.1 --
08154500 Lk Travis nr Austin, TX   1942 Dec.25,1991 710.44 1,852,000 Jul.07,2002 693.5 1,422,000
Guadalupe River Basin
08167700 Canyon Lk nr New Braunfels, TX   1962 Jun.19,1987 942.68 732,600 Jul.06,2002 950.02 --
San Antonio River Basin
08179500 Medina Lk nr San Antonio, TX 4 1913 May.25,1987 1,070.4 289,900 Jul.05,2002 1,074.59 322,300
Nueces River Basin
08206900 Choke Canyon Res nr Three Rivers, TX   1982 Jun.21,1987 222.1 733,100 Jul.15,2002 221.75 724,000
08210500 Lk Corpus Christi nr Mathis, TX 5 1934 Sep.22,1967 94.82 320,000 Jul.16,2002 94.73 --

Footnotes:

1: Record from 1965-1986 and 1999-date.

2: Record from 1953-1986 and 1999-date.

3: Record from 1933-1941, 1944-1986, and 1999-date.

4: Record from 1913-1994 and 1997-date.

5: Record shows second peak height on Sept. 12, 1971.

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