High 1025 hPa centered on the North of the Bay of Biscay remaining almost stationary.
For Penthièvre :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Relatively clear skies becoming changeable. In the evening, clear spells, risk of mist forming.
No precipitation. WSW wind force 3 from the middle of the day. Gusts reaching 17 knots in the middle of the day. Slight sea. Low, fairly long swell from W. Excellent visibility becoming poor in the evening.