The weather is expected to worsen in the next few hours, due to the passage of tropical storm Fiona, in the Caribbean arc. On Thursday 15 September, at the end of the day, the orange vigilance was activated for heavy rains and thunderstorms.
The department has already been on yellow alert for several days for heavy rains and thunderstorms. Tropical storm Fiona continues to progress and is located in the Atlantic about 600km east of Guadeloupe. This Thursday evening, the archipelago was put on orange alert for heavy rains and thunderstorms. It remains yellow for strong winds and wave immersion.
According to the prefecture, the transition to red vigilance could be triggered on Friday afternoon.
The prefect asked in liaison with the rectorate and the communities to close the schools tomorrow from 12:00. It will be the same in Saint-Martin.
Fiona is moving west at 22km / h and is expected to cross the Caribbean arch tomorrow Friday in the late afternoon.
Now it is a strong tropical storm Fiona that is approaching the shores of the archipelago.
The first rainy periods are expected on Friday morning in the form of thunderstorms which can be intense but temporary.
In the afternoon, the rains should intensify and take on a more continuous character. Heavy rains are to be feared, generating numerous floods at the end of the day, evening and night from Friday to Saturday.
Conditions will remain delicate on Saturday with many more passages of heavy and stormy downpours.
Rain accumulations of between 100 and 200 mm are possible during the episode.
An improvement is expected from Sunday morning.
Wind forecasts remain similar to previous Météo France bulletins.
The current Fiona track places Guadeloupe in the southern part of the storm, therefore in a light to moderate wind zone (outside the strong wind storm zone).
However, on Friday morning the wind will take unusual directions from the north, then west to southwest in the afternoon, blowing around 20km / h inland and between 30 and 40km / h at sea.
During the night from Friday to Saturday it will intensify, veering from south to south-east, and then blow at about 40 km / h inland and 50 km / h in the sea.
In addition, due to the numerous storms expected, gusts reaching 60-80 km / h may occasionally occur on Fridays and Saturdays.
Fiona will generate strong seas raised by a weak wave motion from the north-east, but forming cavities of 3 to 3 m50 in the Atlantic and in the canals. In addition, on Friday afternoon and evening, the wind from the west to the southwest could generate an unusual churn on the Caribbean side.
The sea should settle quickly from Saturday morning.
The areas concerned are the north and east of Grand-Terre, Grand-Cul-de-Sac, north of Basse-Terre, east of Marie-Galante, La Désirade, Les Saintes and the Caribbean coast of Guadeloupe.
On Friday, some thunderstorms are expected before the storm. These showers intensify during the night from Friday to Saturday and remain frequent on Saturdays during the day. During the episode, piles of the order of 50 to 80 mm are possible.
On Sunday, some thunderstorms are still possible in the wake of the storm.
Despite the strengthening of Fiona, strong tropical storm winds are not expected on Saint-Martin and Saint-Barthélémy.
On Friday during the day, the east-northeast wind strengthens on average between 45 and 50 km / h, then 60 km / h during the night from Friday to Saturday. On Saturday it turns east-southeast then southeast and drops a notch between 40 and 50km / h. On Sunday there is a more moderate trade wind from the southeast.
In addition, gusts can reach 80 to 100 km / h, especially during thunderstorms.
On Friday, the sea rose to 3m50 during the day, then to 4m50 during the night from Friday to Saturday, under the effect of an east-northeast wave, then an easterly wave generated by the local wind. Amortization occurs quickly on Saturdays throughout the day.