Very Heavy Rains and Flooding in the Coastal Bend

September 17th - 21st 2010

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Summary

On Friday September 17th, 2010 at noon, Hurricane Karl made landfall over central Mexico near Veracruz nearly 600 miles south of Corpus Christi Texas. However, well to the north of Karl, a very moist tropical air mass resided and became the focus for a significant multi-day rainfall event. This rain event resulted in record flooding on Oso Creek in Corpus Christi, one flash flood fatality, and the flooding of numerous streets, homes, and vehicles along the immediate Texas coastline.

Showers and thunderstorms developed over the South Texas region Friday and Saturday, with rainfall amounts ranging between 1 and 4 inches. However on Sunday September 19th, a low pressure trough developed along the mid Texas coast and interacted with an upper level disturbance which focused the heaviest rainfall over Corpus Christi, Sinton, and Rockport. The heaviest rains occurred between 900 AM and 300 PM Sunday in which up to 7 inches of rain was recorded. These heavy rains caused widespread street flooding and road closures in Aransas, San Patricio, Nueces, and Kleberg Counties. Many homes in Corpus Christi were flooded, especially in the neighborhoods near the intersection of Holly and Greenwood. On Monday September 20th, the 4th day of this event, another 1 to 2 inches of rainfall were recorded bringing storm totals up to nearly a foot.

Runoff from these heavy rains flowed into Oso Creek, which runs along the southwest edge of Corpus Christi. The only gaging site on Oso Creek, located on FM 763 about 2 miles west of town, recorded a rapid rise up to 28 feet on Sunday, before it stopped working. A post storm survey conducted by the National Weather Service and United States Geological Survey confirmed the creek crested at 30.62 feet around 805 AM Monday morning which beat the previous record of 29.37 feet set back on August 10th, 1980 during Hurricane Allen.

Rainfall

Sept 17-21st Storm Total Rainfall
Storm Total Rainfall for the period between 9/14 and 9/21.

Location Rainfall Amount(inches) Location Rainfall Amount(inches) Location Rainfall Amount(inches)
Corpus Christi 7.1 SW 12.64 Odem 3.5 ESE 12.11 Corpus Christi 6.5 WSW 11.19
Rockport 10.95 Corpus Christi Intl Airport 10.89 Corpus Christi 3.6 W 10.87
Corpus Christi 6.4 WSW 10.74 Corpus Christi NWS Office 10.53 Cabinass Field 10.43
Corpus Christi 5.7 WSW 10.42 Corpus Christi 6.1 WSW 10.3 Corpus Christi 8.0 WNW 10.29
Corpus Christi 4.3 S 10.22 Corpus Christi 4.1 SW 9.95 Calallen 3.5 SSE 9.77
Corpus Christi 4.3 WSW 9.75 Port Aransas 1.3 ENE 9.65 Rockport 0.6 N 9.59
Waldron Field 9.49 Aransas Pass 1.8 W 9.4 Rockport 3.0 NNW 9.35
Corpus Christi 3.2 SSW 9.08 Robstown 8.73 Rockport 2.1 NNW 8.7
Kingsville 8.2 SE 8.36 Kingsville 3.0 S 8.33 Corpus Christi 9.1 NW 8.08
Bishop 7.87 Corpus Christi 9.0 SSE 7.86 Corpus Christi 7.4 SSE 7.79
Corpus Christi 7.3 SSE 7.66 Alice Intl Airport 7.64 Petronila 11.7 SE 7.5
Refugio 7.46 Flour Bluff 1.6 SW 7.4 Kingsville 6.5 SSE 7.22
Mathis 7.18 Mathis 2.6 NW 6.95 Aransas Wildlife Refuge 6.74
Laredo 7.2 NNW 6.61 Bishop 0.9 ENE 6.53 Seadrift 6.52
Corpus Christi Naval Station 6.23 Sandia 5.1 NNW 5.42 Laredo 6.4 S 5.42
Laredo 4.3 SSE 5.38 Laredo 1.8 SSE 5.34 Kingsville 2.3 WNW 5.3
Sandia 5.4 NW 5.2 Seadrift 5.14 Seadrift 0.6 E 5.14
George West 2 SW 4.97 Goliad 2.4 SE 4.82 Victoria 14.0 SW 4.82
Bloomington 0.3 NE 4.76 Laredo 5.2 S 4.72 Orange Grove 4.5 SE 4.7
Beeville 6.8 ESE 4.69 George West 0.1 WSW 4.61 Goliad 10.9 NE 4.6
Laredo 1.3 NNW 4.57 Orange Gove 8.1 WNW 4.52 Concepcion 1.7 S 4.5
Realitos 0.7 SW 4.5 George West 2.9 E 4.47 Falfurrias 0.5 WNW 4.43
Laredo 2.4 N 4.41 Beeville 6.0 S 4.4 Corpus Christi 4.8 W 4.39
Goliad 4.38 Bloomington 0.5 N 4.37 Victoria Airport 4.32
Weser 1.9 NW 4.32 Laredo (City) 4.29 Austwell 0.2 ESE 4.26
Goliad 10.1 NE 4.21 Victoria 2.0 S 4.2 Laredo 1.2 N 4.2
Orange Grove 2.6 NNW 4.1 Woodsboro 3.6 S 4.03 Tilden 4
Pawnee 6.0 SSW 3.82 Beeville 0.2 NNE 3.69 Beeville 12.6 NNE 3.54
Orange Grove 3.52 Victoria 11.9 SE 3.48 Encinal 13.9 SSE 3.48
Point Comfort 0.8 N 3.32 Port Lavaca 0.9 NW 3.3 Whitsett 3.2
San Diego 0.8 SW 3.2 Catarina 15.4 SW 3.13 Victoria 13.5 W 3.11
Goliad 14.5 WNW 3.1 Inez 2.9 W 3.09 Three Rivers 8.6 NNE 3.06
George West 2.7 NNW 3.05 Inez 2.2 S 3 Laredo Intl Airport 2.85
Port Lavaca 2.83 Cotulla Airport 2.6 Three Rivers 2.18
Loma Alta 1.7 Choke Canyon 1.49 Calliham 0.85
Rainfall Totals between the morning of Sept 17th through the morning of Sept 21st.


 

An interactive map of rainfall totals from the morning of Sept 17th through the morning of Sept 21st. Left double-click zooms in, right double-click zooms out and dragging the mouse pointer pans the display. Click the placemarks for additional information.

Flooding Photos

Corpus Christi Flooding Pictures
Corpus Christi Flooding Photos


Sinton Flooding Pictures
Sinton Flooding Photos

Radar Loop

KCRP reflectivity from 1216Z to 2251Z 9/19/10
KCRP Radar Reflectivity loop beginning at 716 AM CDT on 09/19/10 and ending at 551 PM CDT on 09/19/10.

Satellite Loop

Visible Satellite Imagery Loop for 1415Z to 2215Z 9/19/10
Visible Satellite loop beginning at 915 AM CDT on 09/19/10 and ending at 515 PM CDT on 09/19/10.

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