INDIANA (AP) — The National Weather Service says much warmer temperatures headed toward Indiana could fuel river flooding as the state's thick snowpack begins melting away.

The weather service says snowfall amounts up to one foot cover parts of Indiana, containing the equivalent of more than three inches of water that will begin melting as temperatures rise into the 30s, 40s and higher in the week ahead.

Forecasters say that if significant rain falls on the state during the next week it would greatly heighten the severity of flooding by adding to the runoff as the snowpack melts away.

The weather service also says thick river ice that formed during Indiana's bitter cold spell will also break up as things thaw out, potentially creating ice jams that could spark severe local flooding.