Flash floods affected eastern portions of Deep South Texas during the evening hours of May 24 and into the early morning hours of May 25.  Thunderstorms with torrential rainfall then redeveloped during the afternoon and evening hours of May 25.  The hardest hit counties were Willacy and Cameron, with flooding also reported in Hidalgo County.
Strong thunderstorms affected southwest Willacy County and northern Cameron County during the evening hours of May 24 and into the early morning hours on May 25.  These storms produced significant rains in the 5-7 inch range over rural sections of southwest Willacy County.  Two to three inch rains were also reported in northern Cameron County in Harlingen.  The heavy rains in Willacy County resulted in the closures of major roads during the night.
Storms redeveloped during the afternoon hours on May 25, and then affected many of the same areas that were hit hard the evening before.  Heavy rains pounded an area extending northward from Harlingen to Raymondville, affecting areas in between such as Combes, Lyford and Sebastian with flash flooding.  Over the 24 hour period, much of that area experienced between 8-12 inches of total accumulated rains based on spotter reports, surface observations, and radar estimates.
Strong thunderstorms also formed over Hidalgo County during the afternoon hours of May 25.  Flash flooding of roads was reported in McAllen, Edinburg, Edcouch and Elsa due to estimated rainfall amounts in the 2-5 inch range.
Valley International Airport at Harlingen set 2 new daily rainfall records during this episode. On the 24th Harlingen received 2.73 inches breaking the previous daily record of 1.36 inches set back in 1985. On the 25th, 6.73 inches fell at Harlingen breaking the previous daily record of 3.65 inches set back in 1959. The 6.73 inches falling on the 25th also set a new monthly daily record for the month of May. The previous record was 6.09 inches set on May 1st 1959. Monthly rainfall total at Harlingen was 11.05 inches which makes this the 2nd wettest May on record, the wettest being May of 1982.

Flash Flood in HIDALGO, TEXAS
From 25-MAY-07 12:56:00 to 25-MAY-07 14:00:00 (CST-6)
Location: MC ALLEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding was reported in north McAllen on Pecan Street.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 13:13:00 to 25-MAY-07 18:00:00 (CST-6)
Location: COMBES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Texas DPS reported water covering U.S. Highway 77 in Combes.

Flash Flood in WILLACY, TEXAS
From 25-MAY-07 13:13:00 to 25-MAY-07 15:30:00 (CST-6)
Location: RAYMONDVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Texas DPS reported water covering U.S. Highway 77 in Raymondville.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 13:30:00 to 25-MAY-07 14:30:00 (CST-6)
Location: HARLINGEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Moderate street flooding reported in Harlingen by an NWS employee near Ed Carey road and U.S. Highway 77.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 13:30:00 to 25-MAY-07 14:30:00 (CST-6)
Location: HARLINGEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Moderate street flooding reported in Harlingen by an NWS employee near Ed Carey road and U.S. Highway 77.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 14:00:00 to 25-MAY-07 16:00:00 (CST-6)
Location: HARLINGEN
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Texas General Land Office reported an estimated one foot of water covering the streets in downtown Harlingen.

Flash Flood in WILLACY, TEXAS
From 25-MAY-07 14:11:00 to 25-MAY-07 17:00:00 (CST-6)
Location: SAN PERLITA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Willacy County Sheriff's Office reported water covering the intersection of Highway 186 and Farm to Market Road 1420 in San Perlita.

Flash Flood in HIDALGO, TEXAS
From 25-MAY-07 14:16:00 to 25-MAY-07 16:00:00 (CST-6)
Location: EDINBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Texas DPS in McAllen reported water covering Farm to Market Road 1925 east of U.S. Highway 281 in Edinburg.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 14:34:00 to 25-MAY-07 17:00:00 (CST-6)
Location: SAN BENITO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Texas General Land Office reported flash flooding of U.S. Highway 77 and its frontage road in San Benito.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 14:49:00 to 25-MAY-07 16:30:00 (CST-6)
Location: HARLINGEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Texas General Land Office reported flash flooding of Ed Carey Road in Harlingen near Business Highway 77.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 15:03:00 to 25-MAY-07 18:30:00 (CST-6)
Location: HARLINGEN
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: County Official

Significant flash flooding was reported in the Mariposa subdivision of north Harlingen with water up to car headlights.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 15:03:00 to 25-MAY-07 16:30:00 (CST-6)
Location: SAN BENITO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Flash flooding was reported in San Benito on Business Highway 77 and Farm to Market Road 510.

Flash Flood in CAMERON, TEXAS
From 25-MAY-07 15:19:00 to 25-MAY-07 17:00:00 (CST-6)
Location: SANTA ROSA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Texas Department of Transportation reported flash flooding of Farm to Market Road 506 and Farm to Market Road 107 in Santa Rosa with one and a half feet of water covering the roads.

Flash Flood in HIDALGO, TEXAS
From 25-MAY-07 15:19:00 to 25-MAY-07 17:00:00 (CST-6)
Location: EDINBURG
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding was reported on Farm to Market Road 1925 between FM 1423 and FM 493.  Flooding was also reported on Business Highway 83 between FM 1423 and FM 907 with several cars stalled.

Flash Flood in WILLACY, TEXAS
From 24-MAY-07 21:30:00 to 25-MAY-07 01:00:00 (CST-6)
Location: RAYMONDVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorms produced from 5-7 inches of rain over southwest and western Willacy County.  The rains resulted in the closure of Farm to Market Road 1015 south of Highway 186.

Flash Flood in HIDALGO, TEXAS
From 25-MAY-07 15:19:00 to 25-MAY-07 17:00:00 (CST-6)
Location: ELSA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding of Farm to Market Road 88 and Highway 107 was reported.

Flash Flood in HIDALGO, TEXAS
From 25-MAY-07 15:19:00 to 25-MAY-07 17:30:00 (CST-6)
Location: EDCOUCH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding of Farm to Market Road 1015 and Highway 107 reported.