High 1029 hPa centered at 240 nautical miles in the South-South-West of Fastnet Rock (South-West Ireland) moving at 7 knots to the North-North-East.
For Pornichet :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Overcast in the morning, increasing sunny spells in the afternoon. No precipitation. In the evening, light cloudy spells.
W force 4 in the morning becoming WNW force 3 in the evening. Gusts reaching 19 knots in the morning. Smooth to slight sea. Low, short swell from WSW. Excellent visibility becoming poor in the evening.