Weather guidance system and weather guidance program

1. A weather guidance system configured to guide a weather event having occurred around a user during moving, the weather guidance system comprising:

a control unit having a central processing unit and a memory and an interface unit communicatively coupled to the control unit, the control unit configured to:

acquire a guided event being a weather event previously guided to the user;

determine that, when a new event being a new weather event having occurred around the user is acquired, the new event that is identical in weather type to the guided event and that has an occurrence region without overlapping with an occurrence region of the guided event is guided, and the new event that is identical in weather type to the guided event and that has an occurrence region overlapping with the occurrence region of the guided event is not to be guided; and

cause the interface unit to output a voice message indicating the weather type of the new event and display an outline of the occurrence region of the new event on a screen of the interface unit, when determined that the new event is guided.

2. The weather guidance system according to claim 1 , wherein the control unit is further configured to:

determine that the occurrence regions of the new event and the guided event overlap with each other when an area ratio of a portion where the occurrence region of the new event overlaps with the occurrence region of the guided event is equal to or more than a threshold.

3. The weather guidance system according to claim 2 , wherein the control unit is further configured to:

acquire the weather event having been guided to the user from last turning-on of a vehicle in which the user rides until a present as the guided event.

4. The weather guidance system according to claim 3 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

5. The weather guidance system according to claim 2 , wherein the control unit is further configured to:

acquire the weather event with an elapsed time from a time when the weather event is guided, the elapsed time being equal to or less than a predetermined determination period, as the guided event.

6. The weather guidance system according to claim 5 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

7. The weather guidance system according to claim 2 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

8. The weather guidance system according to claim 1 , wherein the control unit is further configured to:

acquire the weather event having been guided to the user from last turning-on of a vehicle in which the user rides until a present as the guided event.

9. The weather guidance system according to claim 8 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

10. The weather guidance system according to claim 1 , wherein the control unit is further configured to:

acquire the weather event with an elapsed time from a time when the weather event is guided, the elapsed time being equal to or less than a predetermined determination period, as the guided event.

11. The weather guidance system according to claim 10 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

12. The weather guidance system according to claim 1 , wherein the control unit is further configured to:

determine to guide the new event having a risk level equal to or higher than a reference value regardless of whether the new event is identical in weather type to the guided event.

13. The weather guidance system according to claim 1 , wherein the control unit is further configured to cause the interface unit to display a button for transitioning to the screen showing details of the new event.

14. The weather guidance system according to claim 2 , wherein the area ratio is obtained by dividing the overlap, the overlap being an overlapping area of the occurrence region of the new event and the occurrence region of the guided event by a total area of the occurrence region of the new event and the occurrence region of the guided event.

15. A weather guidance program configured to cause a computer to serve as a weather guidance system configured to guide a weather event having occurred around a user during moving, the weather guidance program causing the computer to:

acquire a guided event being a weather event previously guided to the user;

determine that when a new event being a new weather event having occurred around the user is acquired, the new event that is identical in weather type to the guided event and that has an occurrence region without overlapping with an occurrence region of the guided event is guided, and the new event that is identical in weather type to the guided event and that has an occurrence region overlapping with the occurrence region of the guided event is not to be guided; and

cause an interface unit to output a voice message indicating the weather type of the new event and display an outline of the occurrence region of the new event on a screen of the interface unit, when determined that the new event is guided.