A very volatile atmosphere developed during the late afternoon...evening and overnight hours of April 26th across the Four State Region.  An area of low pressure moved from the Texas Hill Country into Northeast Texas during the afternoon.  Meanwhile, a warm front had moved northward from central Louisiana and was oriented west to east near the Arkansas/Louisiana state line.  A dry line had moved just east of the I-35 corridor of North Central Texas and a strong cold front trailed the dry line.  Very strong speed and directional shear was noted in the low and mid levels of the atmosphere such that supercells developed.  Many of these produced tornadoes across the region. Other storms produced strong straight line wind gusts with bowing segments and large hail.

Thunderstorm Wind in UNION, ARKANSAS
From 26-APR-11 20:35:00 to 26-APR-11 20:35:00 (CST-6)
Location: (ELD)EL DORADO GOODW
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured wind gust from an ASOS wind instrument at the South Arkansas Regional Airport.

Thunderstorm Wind in NEVADA, ARKANSAS
From 26-APR-11 18:28:00 to 26-APR-11 18:28:00 (CST-6)
Location: EMMET
Magnitude: 54.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was downed on a vehicle on Hwy. 299 east of Emmitt, Arkansas. There was no report of injuries.

Thunderstorm Wind in NEVADA, ARKANSAS
From 26-APR-11 18:25:00 to 26-APR-11 18:25:00 (CST-6)
Location: DIAN
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was across Hwy. 278 near the Hempstead/Nevada County line.

Tornado in UNION, ARKANSAS
From 26-APR-11 20:53:00 to 26-APR-11 21:15:00 (CST-6)
Location: BLANCHARD SPGS
Tornado F-scale: EF1
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is a continuation of the tornado that moved out of northwest Union Parish, Louisiana and into Union County, Arkansas. The EF1 tornado damaged was confined mainly to trees in rural areas of Union County.  Several trees were snapped and uprooted along the path.  The tornado damaged the roofs of 5 to 6 homes in the community of Lawson, Arkansas.  Only minor damage was noted.  Over most of its path the tornado managed to avoid hitting homes and other buildings.

Hail in NEVADA, ARKANSAS
From 27-APR-11 04:26:00 to 27-APR-11 04:26:00 (CST-6)
Location: ROSSTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAFAYETTE, ARKANSAS
From 27-APR-11 04:41:00 to 27-APR-11 04:41:00 (CST-6)
Location: SPIRIT LAKE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail was reported along the east side of the river.

Hail in NEVADA, ARKANSAS
From 27-APR-11 05:07:00 to 27-APR-11 05:07:00 (CST-6)
Location: IRMA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail was reported by a food store approximately 2 miles south of Rosston along Hwy. 371.

Hail in NEVADA, ARKANSAS
From 26-APR-11 14:49:00 to 26-APR-11 14:49:00 (CST-6)
Location: BLUFF CITY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in MILLER, ARKANSAS
From 26-APR-11 17:51:00 to 26-APR-11 17:51:00 (CST-6)
Location: TEXARKANA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A local spotter estimated the wind gust in Texarkana.