National Weather Service United States Department of Commerce

Flash Flooding Across Goliad and Victoria Counties November 20th - 21st, 2004

By: Mike Gittinger (MET), Greg Wilk (MET), Jason Dunn (MET), Ron Morales (SOO), and John Metz (WCM)


A significant heavy rainfall event occurred across Goliad and Victoria Counties on November 20-21, 2004. Up to 15 inches of rainfall was observed over northern Goliad County which resulted in Flash Flooding along Perdido, Coleto, and Spring Creeks. Several high water rescues were performed as motorists attemped to cross flooded roadways.

Strong thunderstorms erupted along a nearly stationary frontal boundary that extended across south Texas from near Cotulla to Three Rivers and Victoria Saturday evening (Nov 20). Moist, southerly winds off the Gulf of Mexico in the lower levels of the atmosphere fueled the storms along the front. Meanwhile, in the middle to upper level portions of the atmosphere, winds were nearly parallel to the frontal boundary out of the southwest. This combination caused thunderstorms to regenerate and train over the same areas Saturday evening through early afternoon on Sunday. Radar Animation captures the initial round of storms, and slow moving supercell, which tracked across northern Goliad and central Victoria Counties between 356 PM to 824 PM Saturday Nov 20th.

Flash flood warnings were re-issued for northern Goliad County at 6:42 am, Sunday morning as thunderstorms with heavy rainfall moved across areas that had already received several inches of rain Saturday evening. The warnings were extended at 842 am as thunderstorms continued to train across the same areas. Satellite Animation depicts southwest flow aloft and training precipitation in the region with greatest lightning strikes from 615 AM to 1145 AM Nov 21st. Shortly after 9 am, doppler radar estimated rainfall amounts north of Goliad had exceeded 10 inches with additional heavy rainfall moving into the region. Emergency management reported several roads as flooded and impassible. Additional warnings and statements called for catastrophic flooding in northern Goliad County as heavy rainfall continued.

The storms began to impact areas further east and flash flood warnings where extended into northern Victoria County around 10 am. The thunderstorms finally began breaking up across the area in the early afternoon allowing flood waters to subside. In all, doppler radar estimated 10 to 15 inches of rain fell in an 18 hour period beginning Saturday afternoon across northern Goliad County from Charco east to Schroeder and near Coletto Creek Reservoir. This was confirmed by reliable rain gauge reports north of Goliad. In addition, rainfall totals across portions of northwest and central Victoria County reached 5 to 10 inches during this period. Emergency management in both counties reported widespread, major flooding problems with numerous road closers. Several motorists were rescued as they became stranded in rising water. Officials also reported that several homes were flooded and some bridges across northeast Goliad County were washed out by severe flood waters. View Local storm reports from Goliad and Victoria Counties by clicking on the "Storm Reports" tag. Finally, click on the "Photos" tab to see some of the results from the flood.

 

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1252 PM CST SUN NOV 21 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

1030 AM     FLASH FLOOD      2 W INEZ                 28.88N 96.82W 
11/21/2004                   VICTORIA            TX   LAW ENFORCEMENT

            BECK ROAD EAST AND BENBOW ROAD AT GARCITAS CREEK CLOSED

1030 AM     FLASH FLOOD                               28.82N 96.98W 
11/21/2004                   VICTORIA CO         TX   LAW ENFORCEMENT

            EXTENSIVE ROAD CLOSURES ACROSS VICTORIA COUNTY DUE TO 
            HIGH WATER INCLUDING...BISCHOFF ROAD AT ARENOSA 
            CREEK...TIPTON ROAD AT CASA BLANCA...FM1685 AT THE S 
            CURVES...ARNOLD ROAD AT COLETO CREEK...FORDYCE ROAD 
            BETWEEN OLD RIVER AND PARSIFAL ROAD...MIDWAY ROAD AT CASA
            BLANCA CREEK...CORNER OF OLIVER AND PARSONS...FOW 
            ROAD...DENTLER ROAD AND FM237...GIN ROAD...LASALLE 
            ROAD...RAGSDALE ROAD AT GARCITAS CREEK...KEERAN ROAD...FM
            444 NORTH...OLD HIGHWAY ROAD AT GARCITAS CREEL...FM 622 
            NEAR GOLIAD COUNTY.

1100 AM     FLASH FLOOD             VICTORIA            28.82N 6.98W
11/21/2004                          VICTORIA       TX   NWS EMPLOYEE
    
            WATER FLOWING ACROSS NEAD ROAD AT SPRING CREEK
$$

 

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
916 AM CST SUN NOV 21 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0830 AM     FLASH FLOOD      7 N GOLIAD              28.77N 97.39W 
11/21/2004                   GOLIAD             TX   EMERGENCY MNGR  

            RESIDENTS STRANDED NEAR HIGHWAY 183 REQUIRING BOAT 
            RESCUES.

0900 AM     FLASH FLOOD      SCHROEDER               28.80N 97.22W 
11/21/2004                   GOLIAD             TX   EMERGENCY MNGR  

            WATER INTO HOME NEAR STATE HIGHWAY 622.
$$

 

 

 
Up to 15 inches of rain fell in this area which resulted in a flood wave that crossed Highway 183 north of Goliad around 10am Sunday November 21.
The flood wave moved quickly downstream and erroded the landscape around this bridge northeast of Goliad, and washed out another bridge a couple miles upstream.
 

 

Perdido Creek Perdido Creek Flooding Perdido Creek Flooding Bridge Washed Out

 

 

 

 

 

 

The floodwave reached this bridge on FM624 northeast of Goliad around noon and stranded one motorists who tried to cross it. He was rescued by local authorities.
The NWS storm survey team reached that bridge at 2 PM, and took the previous photo approximately 2 hours after the flood wave crested. This hydrograph (height of the creek with respect to time) illustrates the speed at which the flood wave was moving. It took less than three hours for the creek to rise from around 6 feet to over 21 feet!
This photo was taken about 3 miles downstream from the FM624 bridge, and illustrates the shear force of the moving water. Notice the large quantity of sand which was not present before the flood wave. Debris was observed in the tops of the trees on the opposite bank.

 

 

Sand and Debris from Perdido Creek Perdido Creek Debris/Sand Perdido Creek Debris/Sand Perdido Creek Debris/Sand

 

 

 
A F1 tornado touched down in this Hidden Valley community, approximately 6 miles Southeast of Victoria, or about 3 miles west of Dacosta. The tornado was approximately 100 yards wide with a 2 mile path length. Several homes were damaged and two sheds were destroyed. Debris from the subdivision was blown about a mile downwind.

 

 

Tornado Tornado Tornado Tornado Tornado