LITTLE ROCK, Ark. (AP) — A flash flood watch covers much of Arkansas as Hurricane Isaac lumbers toward the state.The National Weather Service says the remnants of Hurricane Isaac — which will likely be a tropical depression at that point — will move north over parts of Arkansas late Thursday through much of Friday.Forecasters say heavy rainfall is possible with 2 or 4 inches expected for much of Arkansas. The weather service says some areas could see 5 inches of rain or more by Friday night.Now, forecasters expect the heaviest rainfall will happen in the western two-thirds of the state, but it's still unclear what track Isaac will take. The weather service says the hilly terrain in parts of western Arkansas increases the risk of flash flooding.Copyright 2012 The Associated Press.