The weather is expected to worsen in the coming hours, due to the passage of tropical storm Fiona, in the Caribbean arc. An orange watch for heavy rain and thunderstorms was triggered by the end of the day on Thursday 15 September.
The department is on yellow alert for heavy rain and thunderstorms for several days. Tropical storm Fiona continues to develop and is located in the Atlantic about 600 km east of Guadeloupe. This Thursday night, the archipelago was put on orange alert for heavy rain and lightning. It remains yellow for strong winds and sinking waves.
According to the prefecture, the transmission of red vigilance can be triggered in the afternoon of Friday.
The prefect requested the rectorate and the communities to close the schools tomorrow from 12:00 noon. This is also the case in Saint-Martin.
Fiona is moving west at 22 km/h and is expected to cross the Caribbean arc tomorrow Friday afternoon.
It is now a strong tropical storm Fiona approaching the shores of the archipelago.
The first periods of rain are expected Friday morning in the form of thunderstorms that will be heavy but temporary.
In the afternoon, the rains should intensify and maintain a more continuous character. Heavy rains that will cause more flooding are to be feared at the end of the day, evening and night from Friday to Saturday.
On Saturday, conditions will remain dangerous with several tracks of strong and stormy rain.
Rainfall accumulations between 100 and 200 mm are possible during the period.
Improvement is expected from Sunday morning.
Forecasts for wind remain similar to previous Météo France bulletins.
Fiona’s current track places Guadeloupe in the southern part of the storm, therefore in a slow to moderate wind zone (except for the hurricane force wind zone).
However, the wind direction is unusual from the northwest on Friday morning, then from the west to the southwest in the afternoon, blowing at 20 km/h on land and 30-40 km/h at sea.
During the night from Friday to Saturday, it will intensify by turning south to southeast, then blowing 40 km/h inland and 50 km/h offshore.
In addition, due to several thunderstorms forecast, gusts reaching 60 to 80 km/h may occur occasionally on Friday and Saturday.
Fiona will generate strong seas lifted by a weak northeast swell but will form holes of 3m to 3m50 in the Atlantic and Channels. In addition, Friday afternoon and evening, winds from the west to the southwest may create unusual disturbances in the Caribbean.
The sea should settle quickly from Saturday morning.
The areas concerned are the north and east of Grand-Terre, Grand-Cul-de-Sac, northern Basse-Terre, east of Marie-Galante, La Désirade, Les Saintes and the Guadeloupe Caribbean Coast.
On Friday, tracks of thunderstorms are expected ahead of the storm. These showers will intensify overnight from Friday to Saturday and remain constant through the day Saturday. Accumulations in the range of 50 to 80 mm are possible during the period.
A few thunderstorms are still possible Sunday.
Despite the strengthening of Fiona, tropical storm force winds are not expected in Saint-Martin and Saint-Barthélémy.
On Friday during the day, east-northeast winds will increase between 45 and 50 km/h on average, then 60 km/h overnight from Friday to Saturday. On Saturday, it turns east-southeast then south-east and drops to a notch between 40 and 50 km/h. There will be more moderate trade winds in the southeast on Sunday.
In addition, the wind can reach 80 and 100 km / h, especially during thunderstorms.
On Friday, the sea deepened to 3m50 during the day then 4m50 overnight from Friday to Saturday, under the effect of an east-northeast swell then an easterly swell generated by local winds. Amortization happens quickly on Saturdays.