A cold front moved into a very moist environment where precipitable water values were near and above two inches. Thunderstorms developed and some produced heavy rain that led to flash flooding.

Flash Flood in WILLIAMSON, TEXAS
From 22-SEP-18 02:00:00 to 22-SEP-18 06:00:00 (CST-6)
Location: LIBERTY HILL
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

More than sixty people had to be rescued from the Casa Rio Del Colores wedding venue as a large wedding party got trapped from quickly rising waters along the South Fork of the San Gabriel River just south of Liberty Hill.  Multiple cars were flooded and inundated.

Flash Flood in WILLIAMSON, TEXAS
From 22-SEP-18 04:00:00 to 22-SEP-18 05:30:00 (CST-6)
Location: TAYLOR MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Williamson County officials reported multiple flooded roads across the eastern sections of Williamson County especially around and just south of Taylor.

Flash Flood in WILLIAMSON, TEXAS
From 22-SEP-18 05:04:00 to 22-SEP-18 08:00:00 (CST-6)
Location: JONAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Williamson County officials reported multiple roads closed due to flooding across the eastern half of the county.

Flash Flood in BANDERA, TEXAS
From 22-SEP-18 00:13:00 to 22-SEP-18 02:30:00 (CST-6)
Location: BANDERA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding. Parts of Hwy 16 and Hwy 173 were closed near Bandera due to water over the road.

Flash Flood in WILLIAMSON, TEXAS
From 22-SEP-18 00:37:00 to 22-SEP-18 03:30:00 (CST-6)
Location: COUPLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding closing several roads in and around Coupland.

Flash Flood in WILLIAMSON, TEXAS
From 22-SEP-18 00:37:00 to 22-SEP-18 03:30:00 (CST-6)
Location: WATERLOO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding closing several roads in and around Taylor.

Flash Flood in BURNET, TEXAS
From 22-SEP-18 01:26:00 to 22-SEP-18 06:00:00 (CST-6)
Location: BERTRAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding. Several low water crossings on CR 330 were flooded along the South Fork of the San Gabriel River southwest of Bertram.

Flash Flood in BANDERA, TEXAS
From 22-SEP-18 02:31:00 to 22-SEP-18 04:15:00 (CST-6)
Location: MEDINA LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding. Park Rd. 37 was closed due to high water in a few locations northeast of Lakehills.

Flash Flood in BEXAR, TEXAS
From 22-SEP-18 03:15:00 to 22-SEP-18 05:00:00 (CST-6)
Location: LEON SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Thunderstorms produced heavy rain that led to flash flooding closing multiple roads in the northwestern part of Bexar County.

Flash Flood in MEDINA, TEXAS
From 22-SEP-18 03:30:00 to 22-SEP-18 05:15:00 (CST-6)
Location: HONDO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms produced heavy rain that led to flash flooding closing several county roads in the southern half of the county.

Flash Flood in BEXAR, TEXAS
From 22-SEP-18 04:29:00 to 22-SEP-18 06:00:00 (CST-6)
Location: LEON SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Thunderstorms produced heavy rain that led to flash flooding closing several low water crossings across the north central and northwestern part of the county.

Flood in MEDINA, TEXAS
From 22-SEP-18 07:00:00 to 22-SEP-18 17:00:00 (CST-6)
Location: CASTROVILLE MUNI ARP
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

There were several RVs that were flooded along the Medina River in the Medina River RV Park as the water rose after a night and morning of heavy rain upstream.  Over 20 people were rescued from their RVs as they became trapped when the river rose above banks and flooded the RV park.