There are provided: a map display control unit that brings up a map on display at a display monitor; a stormy weather condition information reception unit that receives stormy weather condition information; and a stormy weather condition information display control unit that provides a storm path forecast, indicating a predicted path of a storm, based upon the stormy weather condition information by superimposing the storm path forecast over the map on display at the display monitor. The stormy weather condition information display control unit displays the storm path forecast by using a fan-shaped range centered on a current position of the storm with an arc thereof passing through a predicted position that the storm is estimated to assume.