Tropical Storm Moke poised to slam into Hawaii just days after Hurricane Lala

Weather service warns of flooding and mudslides, particularly in areas strongly affected by previous storm

Tropical Storm Moke is poised to slam into the south of Hawaii's islands with forecasters predicting heavy rains and strong winds on Saturday evening, just days after the region was devastated by Hurricane Lala.

The tropical storm is gathering strength as it advances west, according to the National Weather Service (NWS).