Shower and thunderstorm development on the northern periphery of the remnants of Tropical Storm Hermine affected portions of northwest Arkansas beginning on September 7th, while the center was still over central Texas. Light to moderate rain continued through the 8th over much of the region and then became much heavier as the center of the storm moved from southwest Oklahoma into northeast Oklahoma late on the 8th and during the early morning hours of the 9th. The heaviest rainfall totals occurred just east of the storm track.
Rainfall rates of over two inches per hour and rainfall totals of eight to fourteen inches across east central Oklahoma and northwest Arkansas led to widespread flash flooding during the morning hours of the 9th. The heaviest swath of rain occurred across Crawford and southern Washington Counties in Arkansas, which is where some of the worst flooding occurred. The following locations received in excess of seven inches of rain during the event, much of which fell during a several hour period during the early morning hours of the 9th: 9.81 inches in Mountainburg in Crawford County and 9.00 inches in Natural Dam in Crawford County.
Many small creeks and streams rose very quickly from this rainfall. Frog Bayou in Crawford County crested at 16.99 feet at the Rudy gage site by the afternoon of the 9th, overtopping the Highway 282 bridge. The water rose about sixteen feet in only six hours (from about 7 a.m. to about 1 p.m.) at this site. Emergency officials performed numerous swift water rescues and many roads were closed due to the high water throughout the area. Several small bridges and low water crossings were washed out. Mainstem river flooding was minimized since much of the rainfall and runoff was contained by Eufaula Lake and R.S. Kerr Reservoir. However, high lake levels at Kerr Reservoir resulted in high outflow downstream of Kerr, which resulted in brief minor flooding along the Arkansas River at Van Buren.

Flash Flood in WASHINGTON, ARKANSAS
From 09-SEP-10 08:00:00 to 09-SEP-10 17:00:00 (CST-6)
Location: WEST FORK
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

County Road 240 just north of West Fork was closed due to high water.

Flash Flood in CRAWFORD, ARKANSAS
From 09-SEP-10 08:00:00 to 09-SEP-10 16:00:00 (CST-6)
Location: RUDY
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Crawford County Emergency Management reported Highway 282 closed near Rudy due to water over the bridge.

Flash Flood in CRAWFORD, ARKANSAS
From 09-SEP-10 07:45:00 to 09-SEP-10 10:30:00 (CST-6)
Location: KIBLER
Flood cause: Heavy Rain / Tropical System
Property damage: 125.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Crawford County Emergency Management reported many roads flooded in and around Van Buren, which resulted in numerous swift water rescues. The basement of the courthouse, portions of the police department, and the senior citizen's center were flooded. People were evacuated from several homes threatened by flood waters. At least one bridge was damaged by flooding. The Cedarville Elementary School and library were damaged by flood waters.