A strong upper level short wave move from west to east across the Central Plains states of the U.S. driving a cold front southeast into the Four State Region. Strong to severe thunderstorms formed in the unstable air mass ahead of the cold front.  The front and at least 3 lines of thunderstorms moved through the Four State Region from west to east during the day. Strong low level shear in the atmosphere allowed some thunderstorms to rotate, producing tornadoes with damaging straight line winds producing downbursts.

Thunderstorm Wind in BOWIE, TEXAS
From 04-APR-11 07:24:00 to 04-APR-11 07:24:00 (CST-6)
Location: WAKE VLG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Powerlines were downed southwest of Texarkana.

Thunderstorm Wind in CASS, TEXAS
From 04-APR-11 07:35:00 to 04-APR-11 07:35:00 (CST-6)
Location: HUGHES SPGS
Magnitude: 55.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees down all across the county but especially in Hughes Springs.  One tree fell on a building with people trapped inside.  There were no report of any injuries.

Hail in BOWIE, TEXAS
From 04-APR-11 07:40:00 to 04-APR-11 07:40:00 (CST-6)
Location: WAKE VLG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dime size hail reported southwest of Texarkana.

Thunderstorm Wind in BOWIE, TEXAS
From 04-APR-11 07:45:00 to 04-APR-11 07:45:00 (CST-6)
Location: SOUTH TEXARKANA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several areas of Texarkana without power.  Scattered power outages with some tree damage in the area.

Hail in SMITH, TEXAS
From 04-APR-11 07:08:00 to 04-APR-11 07:08:00 (CST-6)
Location: NOONDAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Golfball sized hail was reported in the community of Emerald Bay on Lake Palestine.

Thunderstorm Wind in GREGG, TEXAS
From 04-APR-11 07:20:00 to 04-APR-11 07:20:00 (CST-6)
Location: GREGGTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was downed in town.

Lightning in GREGG, TEXAS
From 04-APR-11 07:19:00 to 04-APR-11 07:19:00 (CST-6)
Location: LIBERTY CITY
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Three oilfield service tanks exploded following a lightning strike.  The tanks were located along FM 1252 east of Liberty City, Texas.  One tank was struck which caused the other two to blow up.

Hail in SMITH, TEXAS
From 04-APR-11 06:56:00 to 04-APR-11 06:56:00 (CST-6)
Location: TYLER POUNDS ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in RED RIVER, TEXAS
From 04-APR-11 06:11:00 to 04-APR-11 06:11:00 (CST-6)
Location: BOGATA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SMITH, TEXAS
From 04-APR-11 07:01:00 to 04-APR-11 07:01:00 (CST-6)
Location: TYLER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Penny to quarter sized hail fell in the southern part of Tyler, Texas.

Hail in BOWIE, TEXAS
From 04-APR-11 07:09:00 to 04-APR-11 07:09:00 (CST-6)
Location: NEW BOSTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Quarter sized hail fell at the Red River Army Depot.