A slow-moving upper level low pressure system was over east Texas on the 9th, over northeast Texas on the 10th, and over Arkansas on the 11th. Thunderstorms associated with this low produced severe weather and heavy rain at times.
Early on the morning of the 11th, excessive rains produced flash flooding in parts of western Arkansas, especially in southern Montgomery and northern Pike counties. A devastating flash flood swept through the Albert Pike Recreation Area in southwest Montgomery County, taking 20 lives.

Flash Flood in PIKE, ARKANSAS
From 11-JUN-10 02:00:00 to 11-JUN-10 07:00:00 (CST-6)
Location: LANGLEY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Flash flooding occurred along the Little Missouri River, the Caddo River, and many of their tributaries. Many highways and secondary roads were flooded. In Glenwood, the Caddo River flooded the cattle auction business, a gas station, and a canoe rental business. Just west of Langley, the Little Missouri River rose from 3 feet to more than 23 feet in only 4 hours. Rainfall for the 24 hour period ending at 7 AM on the 11th included 7.60 inches at Glenwood and 7.20 inches at Langley. The majority of this rain occurred after thunderstorms developed during the early morning hours of the 11th.

Thunderstorm Wind in CLARK, ARKANSAS
From 09-JUN-10 14:10:00 to 09-JUN-10 14:10:00 (CST-6)
Location: OKOLONA
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down.

Thunderstorm Wind in CLARK, ARKANSAS
From 09-JUN-10 14:17:00 to 09-JUN-10 14:17:00 (CST-6)
Location: WHELEN SPGS
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down.

Thunderstorm Wind in CLARK, ARKANSAS
From 09-JUN-10 14:35:00 to 09-JUN-10 14:35:00 (CST-6)
Location: ARKADELPHIA
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down.

Debris Flow in MONTGOMERY, ARKANSAS
From 11-JUN-10 02:00:00 to 11-JUN-10 02:00:00 (CST-6)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Excessive rainfall caused a landslide on Arkansas Highway 369 one-quarter mile southeast of Albert. Rocks and trees slid down onto the highway.

Flash Flood in MONTGOMERY, ARKANSAS
From 11-JUN-10 02:00:00 to 11-JUN-10 07:00:00 (CST-6)
Location: SLATINGTON
Flood cause: Heavy Rain
Property damage: 9.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

Heavy rain fell on saturated ground during the wee hours of June 11th in an area characterized by steep terrain, limited access, and poor communications. Along the Little Missouri River, flash flooding developed rapidly at the Albert Pike Recreation Area in the Ouachita National Forest. The flood took 20 lives, injured 24, and necessitated the rescue of more than 60 people.
The nearest river gage indicated that flood waters rose more than 20 feet in 4 hours.
Motor homes, camping trailers, fifth-wheel trailers, tents, and people and their possessions were all caught up in the flood. Vehicles were washed downstream, asphalt was torn off roads, and boulders rolled down nearby steep hillsides.
An adjacent private campground, known as Camp Albert Pike, was flooded as well. Although no lives were lost there, cabins were destroyed along with additional vehicles, RVs, and camping trailers.
Aside from the flooding produced by the Little Missouri River, most of the creeks in the area overflowed their banks. Trees and other vegetation that had been mowed down by the swift water could be seen at a number of locations along Arkansas Highway 369. In addition, small rockslides occurred on several of the hills adjacent to the highway.
Flash flooding also occurred on the Caddo River around Caddo Gap. A cabin and canoe rental business had several cabins flooded, along with the office/bunkhouse building. One swift-water rescue of campers was necessary. Some cattle and horses were lost to the flooding.
On the Caddo River at Norman, several camping trailers were swept into the river.