High 1027 hPa centered on the South of the Irish Sea moving at 9 knots to the South-South-West to be centered on the Celtic Sea.
For Penthièvre :
No gale warning.
For the night from Tuesday to Wednesday NNE wind force 3 continuing all night. Gusts reaching 16 knots in the middle of the night.
Smooth to slight sea. Low, fairly long swell from W. Excellent visibility. Daytime of Wednesday 23 september : The weather will be good.
Sunny despite some cloudy spells but no rain. In the evening, lots of good clear periods.
No precipitation. NE force 3 in the morning temporarily force 2 in the middle of the day. Gusts reaching 16 knots in the evening. Smooth to slight sea. Low, fairly long swell from W then from N in the middle of the day. Excellent visibility.