Little Rock (AP) - More rain will fall in Arkansas during the week, likely adding more water to already flooding rivers in the state's eastern sections.

The National Weather Service in Memphis, Tenn., issued a warning Tuesday that a storm front will roll through parts of Arkansas, Missouri and Tennessee. The rains, expected to begin Wednesday night, could be heavy at times, possibly sending more rain into Arkansas' flooded prairie.

The weather service issued a flash flood warning for Wednesday night through Thursday morning. Heavy rain could slow the descent of the Black and White rivers in northeast Arkansas, which flooded as rains two weeks ago made their way downstream.

Meanwhile, high waters along the Mississippi River reached Helena-West Helena on Tuesday, causing flooding in some outlying farmlands while not threatening homes.

National Weather Service forecasters predicted the river would crest at 45.8 feet early Wednesday morning. Phillips County Judge Donald Gentry said levees largely protected the city of Helena-West Helena.

"There's farmland out there, but no homes," Gentry said.

At Des Arc on Tuesday, the White River was at 30.3 feet - still slightly above flood stage of 30 feet but down from the 33.18-foot level of last Thursday, the weather service said.

The Weather Service reported moderate flooding in the White County town of Georgetown, where the White River was at 25.4 feet Tuesday - down from 28.61 feet on March 27.

The weather service said the Mississippi River near Arkansas City was forecast to crest Friday at 41.5 feet. Flood stage is 37 feet.