An upper level trough remained situated out to the west in Northern Mexico and the Southwest U.S.  A very unstable airmass developed during the afternoon hours across South Texas triggering thunderstorms.  An upper level shortwave rotated out of Mexico during the afternoon providing increasing large-scale ascent, divergence aloft and steepening mid-level lapse rates.  Thunderstorms initially began as supercells across the Rio Grande Plains and Duval and Jim Wells counties during the afternoon and early evening, producing large hail and heavy rain.  The supercells organized into a squall-line during the evening and moved east across the Coastal Bend, producing heavy rainfall and flash flooding.  A wake low formed over the Coastal Bend behind the squall line as it moved into the offshore waters during the late night and early morning hours.  High sustained winds of 40 to 50 mph, with some gusts over 60 mph, developed over the Coastal Bend, Victoria Crossroads region and the bays and nearshore waters.  Damage associated with these winds was mainly confined to tree limbs, however a tug boat in Port Oconnor was reportedly damaged.  See High Wind event entry as well as wind entries under Gulf of Mexico for further information.

Hail in JIM WELLS, TEXAS
From 04-APR-04 14:58:00 to 04-APR-04 14:58:00 (CST)
Location: BEN BOLT
Magnitude: 2.75 
Reported by: LAW ENFORCEMENT

Hail in WEBB, TEXAS
From 04-APR-04 17:40:00 to 04-APR-04 17:40:00 (CST)
Location: LAREDO
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Nickle-size hail reported by law enforcement on Interstate 35, 12 miles noth of Laredo.

Flash Flood in WEBB, TEXAS
From 04-APR-04 17:35:00 to 04-APR-04 18:00:00 (CST)
Location: NORTHWEST PORTION
Reported by: LAW ENFORCEMENT

Slow moving thunderstorms dumped heavy rainfall across northern Webb county and La Salle County.  Doppler radar estimated widespread amounts of 1 to 2 inches fell, with localized amounts of 3 inches across northern Webb county.  Flooding was reported along Highway 44 and U.S. 83 where the 3 inches was estimated.

Flash Flood in JIM WELLS, TEXAS
From 04-APR-04 15:30:00 to 04-APR-04 17:00:00 (CST)
Location: CENTRAL PORTION
Reported by: LAW ENFORCEMENT

A slow moving supercell prodcued very heavy rainfall from the Duval and Jim Wells county line, along F.M. 2295, to just south of Alice.  Doppler radar estimated 4 to 5 inches of rain fell across central Jim Wells county resulting in flash flooding and water over several Farm to Market roads.

Hail in DUVAL, TEXAS
From 04-APR-04 17:00:00 to 04-APR-04 17:00:00 (CST)
Location: SEJITA
Magnitude: 2.75 
Reported by: BROADCAST MEDIA

Baseball-size hail reported in extreme southwestern Duval county.

Hail in WEBB, TEXAS
From 04-APR-04 16:13:00 to 04-APR-04 16:13:00 (CST)
Location: CALLAGHAN
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Flash Flood in DUVAL, TEXAS
From 04-APR-04 20:30:00 to 04-APR-04 21:45:00 (CST)
Location: SOUTHWEST PORTION
Reported by: NWS STORM SURVEY

A slow moving supercell in northern Jim Hogg county moved east along the border of Brooks and Duval county.  Radar estimated 4 to 6 inches of rain fell in extreme southeastern Duval county.  Flooding was observed along Highway 285 forcing it to be closed.

Flash Flood in BEE, TEXAS
From 04-APR-04 21:00:00 to 04-APR-04 22:45:00 (CST)
Location: SOUTH CENTRAL PORTION
Reported by: LAW ENFORCEMENT

Widespread 1 to 2 inches of rain fell across Bee county as a squall line formed over the area.  This fell across satrudated grounds from heavy rains on April 2nd.  Law enforcement closed a section of U.S. 59 from Beeville to the Live Oak county line due to a number of low water crossings flooded.

Hail in DUVAL, TEXAS
From 04-APR-04 12:55:00 to 04-APR-04 12:55:00 (CST)
Location: SAN JOSE
Magnitude: 1.50 
Reported by: TRAINED SPOTTER

Hail in WEBB, TEXAS
From 04-APR-04 17:12:00 to 04-APR-04 17:12:00 (CST)
Location: LAREDO
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Penny-size hail reported by law enforcement on Interstate 35, 13 miles north of Laredo.

Flash Flood in WEBB, TEXAS
From 04-APR-04 19:15:00 to 04-APR-04 20:00:00 (CST)
Location: SOUTHEAST PORTION
Reported by: LAW ENFORCEMENT

Slow moving thunderstorms over the Laredo area movind east along Highway 359 producing very heavy rainfall.  Radar estimated 2 to 3 inches fell in areas of southeastern Webb county. Flooding was reported along Highway 359 just east of Aguilares.

Tornado in WEBB, TEXAS
From 04-APR-04 14:04:00 to 04-APR-04 14:04:00 (CST)
Location: CALLAGHAN
Tornado F-scale: F0
Reported by: GENERAL PUBLIC

Public reported a brief touchdown just off of Highway 44, 5 miles west of Interstate 35.  The tornado remained over open country.

Funnel Cloud in WEBB, TEXAS
From 04-APR-04 16:50:00 to 04-APR-04 16:50:00 (CST)
Location: CALLAGHAN
Reported by: STORM CHASER

Hail in WEBB, TEXAS
From 04-APR-04 16:30:00 to 04-APR-04 16:30:00 (CST)
Location: CALLAGHAN
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Golf ball-size was reported in northern Webb county, 5 miles east-southeast of Encinal on Highway 44.

Flash Flood in WEBB, TEXAS
From 04-APR-04 18:00:00 to 04-APR-04 19:30:00 (CST)
Location: LAREDO
Reported by: LAW ENFORCEMENT

Heavy rainfall of 1 to 2 inches produced flash flooding in Laredo.  Numerous city streets were flooded, stranding several vehicles.  Several rescues were required by fire department.

High Wind in SAN PATRICIO, TEXAS
From 05-APR-04 01:30:00 to 05-APR-04 03:30:00 (CST)
Magnitude: 40 ES
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph estimated from 230-430 a.m. CDT.  High winds were associated with wake low.

High Wind in ARANSAS, TEXAS
From 05-APR-04 03:00:00 to 05-APR-04 04:30:00 (CST)
Magnitude: 40 ES
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph estimated from 400-530 a.m. CDT from Matagorda RAWS site.  Peak wind gust at RAWS site was 46 mph at 500 a.m. CDT.  High winds associated with wake low.

High Wind in NUECES, TEXAS
From 05-APR-04 01:30:00 to 05-APR-04 03:30:00 (CST)
Magnitude: 40 MS
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph occured at Bob Hall Pier from 230-430 a.m. CDT.  Peak wind gusts: CRP 54 mph at 230 a.m. CDT, NGP 51 mph at 258 a.m. CDT, Bob Hall Pier 55 mph at 300 a.m. CDT.  High winds were associated with wake low.  Winds resulted in several medium-size tree braches down throughout the Corpus Christi metro area.

Hail in DUVAL, TEXAS
From 04-APR-04 14:58:00 to 04-APR-04 14:58:00 (CST)
Location: SAN JOSE
Magnitude: 2.75 
Reported by: LAW ENFORCEMENT

Baseball-sized hail was reported by law enforcement on F.M. 2295, along the Duval and Jim Wells county line.  Hail was reportedly as much as foot deep on the ground.

Hail in DUVAL, TEXAS
From 04-APR-04 12:55:00 to 04-APR-04 12:55:00 (CST)
Location: BENAVIDES
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in WEBB, TEXAS
From 04-APR-04 19:00:00 to 04-APR-04 19:00:00 (CST)
Location: AGUILARES
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in LA SALLE, TEXAS
From 04-APR-04 16:13:00 to 04-APR-04 16:13:00 (CST)
Location: ENCINAL
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golf ball-size hail reported on Interstate 35, just south of Encinal, along the Webb and La Salle county line.

Flash Flood in KLEBERG, TEXAS
From 04-APR-04 22:40:00 to 05-APR-04 00:00:00 (CST)
Location: SOUTH CENTRAL PORTION
Reported by: LAW ENFORCEMENT

A sqaull line moved into the Coastal Bend producing heavy rainfall.  A widespread 1 to 3 inches fell over the southern Coastal Bend, including Kleberg county.  Several Farm to Market and County roads were flooded.  Radar estimated 3 to 4 inches of rain fell, where the squall line merged with a supercell.  Highway 285 was reported flooded and closed in southwest Kleberg county.

High Wind in KLEBERG, TEXAS
From 05-APR-04 01:00:00 to 05-APR-04 02:15:00 (CST)
Magnitude: 40 ES
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph estimated from 200-315 a.m. CDT.  Peak wind gust at South Bird Island was 49 mph at 300 a.m. CDT.  High winds were associated with wake low.

High Wind in CALHOUN, TEXAS
From 05-APR-04 03:00:00 to 05-APR-04 05:00:00 (CST)
Magnitude: 40 MS
Reported by: AWOS,ASOS,MESONET,ETC

Sustain winds of 40 mph occurred from 400-600 a.m. CDT.  Peak wind gust at Port Oconnor was 63 mph.  Tug boat was reported damaged.

High Wind in VICTORIA, TEXAS
From 05-APR-04 01:32:00 to 05-APR-04 04:00:00 (CST)
Magnitude: 40 MS
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph occured from 200-600 a.m. CDT throughout the region.  Selected peak wind gusts:  VCT 64 mph at 236 a.m. CDT,  CRP 54 mph at 230 a.m. CDT,  NGP 51 mph at 258 a.m. CDT,  Bob Hall Pier 55 mph at 300 a.m. CDT,  South Bird Island 49 mph at 300 a.m. CDT and Matagorda RAWS 46 mph at 500 a.m. CDT.  High winds were associated with wake low.  Winds resulted in several small and medium-size tree branches down throughout the region.  Tug boat was reported damaged in the Port Oconnor area.

High Wind in REFUGIO, TEXAS
From 05-APR-04 02:00:00 to 05-APR-04 04:00:00 (CST)
Magnitude: 40 ES
Reported by: AWOS,ASOS,MESONET,ETC

Sustained winds of 40 mph estimated from 300-500 a.m. CDT.  High winds associated with wake low.