A very unstable airmass developed across the four state region during the afternoon hours of May 2nd.  A weak cold front had moved southward during the morning hours into southeast Oklahoma and southwest Arkansas and had stalled.  A weak shortwave moved into the Texas Hill County and produced enough lift...along with the development of a strong low level jet...for strong to severe thunderstorms to erupt across the region.  The storms initially developed as supercells...producing large hail and isolated tornadoes but then evolved into a squall line.  Strong straight line winds accompanied the squall line with winds in excess of 70 mph reported with some storms.  There were also isolated tornadoes reported within the squall line itself.  Damage was extensive across the region but overnight...the repeated training of storms resulted in a widespread flash flooding event.  Numerous counties and parishes were flooded with rainfall amounts in excess of 6 inches in a 12 hour period common.  By the time the event ended...there were five different line echo wave patterns that developed across the four state region the afternoon of May 2nd through the morning hours of May 3rd.

Flash Flood in LAFAYETTE, ARKANSAS
From 03-MAY-09 03:45:00 to 03-MAY-09 07:45:00 (CST-6)
Location: LEWISVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water across Hwy. 313 resulting in a road closure.

Flash Flood in LAFAYETTE, ARKANSAS
From 02-MAY-09 18:35:00 to 02-MAY-09 19:45:00 (CST-6)
Location: MARS HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Flooding was reported along county road 18 east of Ar. Hwy. 29.

Thunderstorm Wind in UNION, ARKANSAS
From 02-MAY-09 19:24:00 to 02-MAY-09 19:24:00 (CST-6)
Location: STRONG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A couple of trees were blown down in town.

Flash Flood in HEMPSTEAD, ARKANSAS
From 02-MAY-09 23:00:00 to 03-MAY-09 10:45:00 (CST-6)
Location: CENTERVILLE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

Several county roads were flooded and closed.  Culverts were washed out on Hempstead County roads 56 and 166.  Major debris removal was necessary after flood water came down on HCR 256, 41, 38, 39 and 52.

Flash Flood in LAFAYETTE, ARKANSAS
From 02-MAY-09 19:51:00 to 03-MAY-09 07:45:00 (CST-6)
Location: BRADLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

One foot of water was reported across County Roads 9 and 4 west of town.

Thunderstorm Wind in UNION, ARKANSAS
From 02-MAY-09 19:36:00 to 02-MAY-09 19:36:00 (CST-6)
Location: HUTTIG
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were downed.

Flash Flood in LITTLE RIVER, ARKANSAS
From 02-MAY-09 23:48:00 to 03-MAY-09 00:00:00 (CST-6)
Location: FOREMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding of several county roads were reported across Little River County.

Hail in LAFAYETTE, ARKANSAS
From 02-MAY-09 17:43:00 to 02-MAY-09 17:43:00 (CST-6)
Location: SPIRIT LAKE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail reported along Hwy. 82 west of Lewisville, Arkansas.

Tornado in MILLER, ARKANSAS
From 02-MAY-09 17:13:00 to 02-MAY-09 17:18:00 (CST-6)
Location: PLEASANT HILL
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees and powerlines were snapped along Blackman Ferry Road and along CR 10.  A porch and its contents were blown off the back of the home and strewn downstream one half mile.  Damage also extended west to State Line Road.  Injuries occurred along Blackman Ferry Road where a powerpole fell on a car injuring the driver and two passengers.

Thunderstorm Wind in UNION, ARKANSAS
From 02-MAY-09 19:02:00 to 02-MAY-09 19:02:00 (CST-6)
Location: EL DORADO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were downed on the west side of El Dorado, Arkansas.

Hail in MILLER, ARKANSAS
From 02-MAY-09 17:20:00 to 02-MAY-09 17:20:00 (CST-6)
Location: MT PLEASANT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Flash Flood in COLUMBIA, ARKANSAS
From 03-MAY-09 03:45:00 to 03-MAY-09 07:45:00 (CST-6)
Location: MAGNOLIA MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

County Road 5 underwater and closed at this time.

Flash Flood in LAFAYETTE, ARKANSAS
From 02-MAY-09 18:35:00 to 02-MAY-09 19:45:00 (CST-6)
Location: BOYD HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Water was reported over the road along county road 5 north of U.S. Hwy. 82.

Flash Flood in LITTLE RIVER, ARKANSAS
From 03-MAY-09 03:45:00 to 03-MAY-09 08:00:00 (CST-6)
Location: FOREMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Some street flooding reported in Fulton, Arkansas.

Hail in LAFAYETTE, ARKANSAS
From 02-MAY-09 17:43:00 to 02-MAY-09 17:43:00 (CST-6)
Location: BRADLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Flash Flood in MILLER, ARKANSAS
From 03-MAY-09 03:45:00 to 03-MAY-09 07:45:00 (CST-6)
Location: TEXARKANA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding reported across the entire county.  Several roads closed.

Thunderstorm Wind in MILLER, ARKANSAS
From 02-MAY-09 17:20:00 to 02-MAY-09 17:20:00 (CST-6)
Location: MT PLEASANT
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree was downed on a mobile home on Hwy 237 S.  There were no report of injuries.

Thunderstorm Wind in MILLER, ARKANSAS
From 02-MAY-09 17:16:00 to 02-MAY-09 17:16:00 (CST-6)
Location: TEXARKANA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured gust recorded at the Texarkana, Airport.

Hail in MILLER, ARKANSAS
From 02-MAY-09 17:24:00 to 02-MAY-09 17:24:00 (CST-6)
Location: FOUKE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in MILLER, ARKANSAS
From 03-MAY-09 00:10:00 to 03-MAY-09 00:10:00 (CST-6)
Location: FOUKE
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees downed across the southern half of the county.

Flash Flood in MILLER, ARKANSAS
From 02-MAY-09 18:20:00 to 02-MAY-09 19:45:00 (CST-6)
Location: TEXARKANA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous streets flooded in town from excessive heavy rainfall.  Several streets had to be closed.

Thunderstorm Wind in NEVADA, ARKANSAS
From 02-MAY-09 15:30:00 to 02-MAY-09 15:30:00 (CST-6)
Location: ROSSTON
Magnitude: 53.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees downed near Rosston, Arkansas.  Other trees were downed along Hwy 278 in Nevada County.  A vehicle struck a downed tree and the accident resulted in two injuries.

Flash Flood in LAFAYETTE, ARKANSAS
From 03-MAY-09 07:56:00 to 03-MAY-09 10:45:00 (CST-6)
Location: LEWISVILLE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several rural roads were flooded and closed across the county.  Highway department reported that nearly 30 culverts were washed out and 75 to 80 percent of those will have to be repaired.

Thunderstorm Wind in LAFAYETTE, ARKANSAS
From 02-MAY-09 17:37:00 to 02-MAY-09 17:37:00 (CST-6)
Location: SPIRIT LAKE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Estimated 70 mph winds along Hwy. 82 west of town.  Trees were also reported down across Hwy. 29 south of Bradley.  A tree was down on powerlines and the roadway on Buchanan Street in Stamps.  A couple of trees were downed on powerlines on Hwy. 53 south of Stamps.  A tree was downed on Lafayette Road 59.  In addition, a vehicle hit a fallen tree on the roadway west of Bradley, Arkansas.