Météo Consult Weather Bulletin for Thursday, April 17

General situation

This Thursday, there will be a lull with the rise of a high pressure ridge at 1015 hPa, under a weak south to southwest flow.

On Friday, a new low pressure system will arrive south of Ireland at 999 hPa, with a strengthening southerly flow ahead. The weather will become increasingly unsettled with rain and showers.

Saturday, a low pressure system at 998 hPa will be under the influence of a low pressure system over the Bay of Biscay. Cloudy weather with a few showers under a weakening southerly and then northerly wind.

Weather conditions in Concarneau :

Thursday, April 17:

Beautiful clear spells in the morning before the weather deteriorates further in the evening with clouds and a few drops of rain early in the night.

Light southerly wind in the morning, strengthening in the afternoon until the end of the day from the southwest.

Temperatures from 6 to 13°C.

Chance of precipitation: 30%

Friday, April 18 :

Unsettled weather with overcast skies accompanied by heavy rain, especially between late morning and early afternoon.

Moderate south to southeast winds of 25 to 35 km/h, with gusts to 55 km/h.

Temperatures from 10 to 13°C.

Chance of precipitation: 100%

Trend for the following days :

Saturday, April 19 :

Trailing weather with often overcast skies accompanied by a few showers early in the morning.

Southwest wind increasingly weak at 10 to 15 km/h.

Temperatures from 8 to 13°C.

Chance of precipitation: 70%

Sunday, April 20 :

Mostly cloudy to overcast with a slight risk of showers early this morning.

Light to moderate north wind 15 to 20 km/h, gusting to 40 km/h.

Temperatures from 9 to 13°C.

Chance of precipitation: 45%

Weather conditions for the start of the Transat Paprec at 1:02 p.m. in Concarneau Bay :

Wind conditions are expected to be quite good for the skippers' departure at midday this Sunday.

The reliability of the forecast is still quite limited (60-70%) regarding the precise direction and intensity of the wind, but the majority option to date is that of a moderate north to northwest wind for the start (10 to 15 knots, gusts to 25 knots). The clearings will remain timid with abundant cloudy passages which may be accompanied by showers with fairly moderate gusts.

Weather forecast for the start of the Transat Paprec

Wind conditions are expected to be moderate or even sensitive for the first hours of racing in the northern part of the Bay of Biscay. The northwest wind will gradually strengthen as a low pressure trough passes inland in Biscay and will blow between 18 and 25 knots, which will allow sailing across the water, allowing the skippers to progress on the direct route, towards La Coruña. The sea will be quite rough with a westerly swell of around 1.2 m. Between Sunday evening and Monday, the existing low pressure system will quickly fill as it returns to the French mainland to the east. The sailors will therefore have to cross the Bay of Biscay still across the water under an established and rather moderate westerly flow of 15 to 20 knots. The flow will be oriented to the west-northwest sector and will allow navigation always across (the wind will come to the right of the sailboats) with a wind whose intensity remains to be specified but which should be around 15 to 20 knots.

Full bulletin here: https://marine.meteoconsult.fr/