A very unstable airmass developed across the Four State region during the afternoon and evening hours of December 12th. A potent upper level storm system moved out of the Inter Mountain West and into the Southern Plains during the afternoon as well. A warm front moved north of the region allowing for dewpoint temperatures well into the 60s across the entire region. Shear was very strong ahead of this upper level storm system with nearly 70 knots of deep layer shear. The wind profile however was unidirectional which given the instability in place, provided the necessary ingredients for a squall line to develop. Storms originally developed across North Central Texas and Southern Oklahoma along a prefrontal surface trough. The broken line of storms increased in coverage and intensity with the squall line moving through the entire Four State Region during the late night hours of the 19th and early morning hours of the 20th. Wind damage was widespread across the entire Four State Region.

Thunderstorm Wind in LAFAYETTE, ARKANSAS
From 20-DEC-12 00:50:00 to 20-DEC-12 00:50:00 (CST-6)
Location: STATE LINE
Magnitude: 57.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were downed near Hwy. 53 and Walker Creek.

Thunderstorm Wind in SEVIER, ARKANSAS
From 19-DEC-12 23:20:00 to 19-DEC-12 23:20:00 (CST-6)
Location: DE QUEEN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees and powerlines were downed throughout the entire county.

Thunderstorm Wind in COLUMBIA, ARKANSAS
From 20-DEC-12 00:55:00 to 20-DEC-12 00:55:00 (CST-6)
Location: MT VERNON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A few trees were downed along Hwy. 344 near Mount Vernon.

Thunderstorm Wind in SEVIER, ARKANSAS
From 19-DEC-12 23:30:00 to 19-DEC-12 23:30:00 (CST-6)
Location: BEN LOMOND
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind damage was reported to the front porch of a home and the chimney of the same house.

Thunderstorm Wind in COLUMBIA, ARKANSAS
From 20-DEC-12 01:05:00 to 20-DEC-12 01:05:00 (CST-6)
Location: MAGNOLIA MUNI ARPT
Magnitude: 57.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were downed across Hwy. 371 making the highway impassible.

Thunderstorm Wind in UNION, ARKANSAS
From 20-DEC-12 01:55:00 to 20-DEC-12 01:55:00 (CST-6)
Location: EL DORADO
Magnitude: 54.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: State Official

Trees were downed around El Dorado including one tree on a home just north of town.  There were no reports of injuries.

Thunderstorm Wind in MILLER, ARKANSAS
From 19-DEC-12 23:57:00 to 19-DEC-12 23:57:00 (CST-6)
Location: TEXARKANA
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A measured 59 mph gust was recorded at the KTXK ASOS on the airport.

Thunderstorm Wind in HEMPSTEAD, ARKANSAS
From 20-DEC-12 00:30:00 to 20-DEC-12 00:30:00 (CST-6)
Location: SPRING HILL
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed on Hwy. 29 blocking traffic south of Hope, Arkansas.

Thunderstorm Wind in LITTLE RIVER, ARKANSAS
From 19-DEC-12 23:35:00 to 19-DEC-12 23:35:00 (CST-6)
Location: ASHDOWN
Magnitude: 59.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees and powerlines were downed throughout the county.

Thunderstorm Wind in UNION, ARKANSAS
From 20-DEC-12 02:15:00 to 20-DEC-12 02:15:00 (CST-6)
Location: STRONG
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees were downed in and around the town of Strong, Arkansas.

Thunderstorm Wind in SEVIER, ARKANSAS
From 19-DEC-12 23:15:00 to 19-DEC-12 23:15:00 (CST-6)
Location: HORATIO
Magnitude: 58.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was downed on a house in Horatio, Arkansas.  No injuries were reported.

Thunderstorm Wind in NEVADA, ARKANSAS
From 20-DEC-12 00:30:00 to 20-DEC-12 00:30:00 (CST-6)
Location: BOUGHTON
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed across Interstate 30 near mile marker 48 north of Prescott, Arkansas.

Thunderstorm Wind in UNION, ARKANSAS
From 20-DEC-12 01:36:00 to 20-DEC-12 01:36:00 (CST-6)
Location: EL DORADO
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured wind gust from the ASOS in El Dorado, Arkansas.

Thunderstorm Wind in MILLER, ARKANSAS
From 20-DEC-12 00:00:00 to 20-DEC-12 00:00:00 (CST-6)
Location: TEXARKANA
Magnitude: 51.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roof or structural damage was reported to several homes in the Texarkana area.

Thunderstorm Wind in NEVADA, ARKANSAS
From 20-DEC-12 00:35:00 to 20-DEC-12 00:35:00 (CST-6)
Location: WEAVER
Magnitude: 67.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: State Official

A mobile home was nearly destroyed due to damaging wind gusts.  The home was located near Nevada County Road 246 just west of the Redland Community.  Four individuals were in the home at the time but none sustained any injuries.

Thunderstorm Wind in HEMPSTEAD, ARKANSAS
From 20-DEC-12 00:20:00 to 20-DEC-12 00:20:00 (CST-6)
Location: HOPE
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees and powerlines were downed through the entire county.

Thunderstorm Wind in LAFAYETTE, ARKANSAS
From 20-DEC-12 00:40:00 to 20-DEC-12 00:40:00 (CST-6)
Location: STAMPS
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

A tree was downed onto a car in the Stamps community.  No injuries were reported.

Thunderstorm Wind in LITTLE RIVER, ARKANSAS
From 19-DEC-12 23:20:00 to 19-DEC-12 23:20:00 (CST-6)
Location: FOREMAN
Magnitude: 60.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Structural damage was reported to several properties across the Foreman, Arkansas area.  There were no reports of injuries.

Thunderstorm Wind in LAFAYETTE, ARKANSAS
From 20-DEC-12 00:45:00 to 20-DEC-12 00:45:00 (CST-6)
Location: CANFIELD
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Three trees were downed onto Hwy. 29 in the Canfield community.