Herold formed on 13 March from a disorganized area of low pressure near Tromelin Island.

[2] When Herold reached Madagascar, it caused five deaths and an unknown amount of damage.

Météo France predicted it would strengthen into a tropical depression by the end of the week.

[2] Over the next two weeks, it gradually gained convection,[3] until on 13 March, Zone of Disturbed Weather 10 formed northwest of Madagascar.

[4] Late on 14 March, 10 reached moderate tropical storm intensity and was named Herold.

By 17 March, though, the water level had decreased a fair amount in the community.

13 of 20 municipalities in the Maroantsetra district were underwater and 28 houses had been destroyed in the town of Mahalevona.

[14] The effects of Herold didn't end until the cyclone alerts were lifted on 17 March for the entire island.

[18] When Herold passed in between the islands of Mauritius and Rodrigues on 17 March, it made schools close and caused eighty people to seek refuge in accommodation centers.