Bulletin météo du 18 mars 2015

Le leader Cheminées Poujoulat a fait route au nord vers les hautes pressions s'étalant dans le sud-ouest des Açores et ont vu les vents mollir au fur et à mesure de leur progression. Ils ont maintenant viré de bord pour s'éloigner du centre de la dorsale et retrouver des vents plus soutenus. Ils font route maintenant vers le golfe de Cadix et le détroit de Gibraltar. Neutrogena et GAES Centros Auditivos vont devoir continuer à louvoyer pendant plusieurs jours. Les vents devraient forcir et adonner légèrement à mesure leur remontée vers le nord. R
We Are Water et One Planet, One Ocean & Pharmaton naviguent dans des alizés de secteur est modérés et plutôt stables. Si les vents devraient rester stables, le Pot au noir devrait se décaler dans le sud et grossir dans les prochains jours. La traversée de l'équateur devrait être plus lente pour ces bateaux que pour les trois premiers. Les conditions instables et faibles se maintiennent pour Renault Captur sur leur route décalée dans l'ouest par rapport à celle des autres bateaux. La situation ne devrait pas évoluer pour eux. Spirit of Hungary navigue dans des vents assez forts de secteur nord générés par l'anticyclone dans leur nord-est.

Meteo MARS 18, 2015 07:20

*** SYNOPSIS ***
00Z WEDNESDAY (18-MAR-2015)
1)    A strong W’ly from Cape Horn north to the Falklands and east to South Georgia Island. Weak high pressure (1018mb) near 44S/60W.
2)    A front southeast off the Argentinian coast, with another high (1021mb) near 41S/47W.
3)    Sub-tropical low pressure (1013mb) near 37S/37W. Strong winds wrapping into the low from the east and south.
4)    North of the low, a zone of very light winds between 33S and 25S, where the trade winds return.
5)    East of 30W, the trade winds will hold, supporting flow into the subtropical low to the south.
6)    Otherwise, solid trade winds north of 25S, veering from ENE at 25 S to ESE at 10S.
7)    The doldrums will be between 02S and 01N – wider east of 30W and narrower to the west.
8)    North of the Doldrums, the NE trade winds will be firming and filling again as a sharp high pressure ridge move across the east Atlantic. High pressure (1032mb) near the Azores and a low (1013mb) off the Portuguese coast will support fresh to strong N’ly winds from Madeira to the Canary Island.
9)    There will also be some surging of NE gradient between the Canary Islands and Cape Verde Islands.

00Z THURSDAY (19-MAR-2015)
1)    Low pressure (971mb) near 63S/63W south and southeast of Cape Horn. Front extends across Cape Horn to west of Falkland Islands. Fresh NW flow from BA to South Georgia Island. Windsshift fresh/strong W’ly behind front.
2)    High (1022mb) near 39S/47W. E winds north of the high to 30S. East of the high, S’ly winds to 35W.
3)    Low pressure (105mb) near 41S/30W.
4)    Area of light and variable winds southeast of Rio to 30S/30W.
5)    Southern Hemisphere trade winds north of 22S. trads E/ENE at 25S veeering to E/SE north of 10S. Wind speeds generally increase with distance north of 10S.
6)    Doldrums 03S to 01N with light winds, but no significant calms are forecast. Some scattered showers and a few thunderstorms within the trades, but no widespread activity.
7)    NE trade winds firming north of 03N, and moderate NNE/NE veering NE/ENE with distance north.
8)    High (1030mb) centered near the Azores. Fresh NE trades from the Canary Islands to Cape Verde Islands.
9)    Low pressure (1010mb) over the Gulf of Cadiz. Fresh H winds between the Azores high and Gulf low. Mostly light and variable winds in the Gulf of Cadiz.

00Z FRIDAY (20-MAR-2016)
1)    Weak high (1009mb) near 45S?62W. A trough of low pressure north of the high extending southeast of Punta Alta, Argentina to 45S/55W.
2)    High (1021mb) near 46S/25W w/ ridge extending west-northwest to 38S/47W. Moderate NW winds between ridge and trough to the south.
3)    Low (1014mb) near 32S/34W, with a broad area of low pressure associated with the low southeast of Cabo Frio.
4)    ESE/E trades north of 22S, building with distance north, becoming moderate E trade winds between 16S and 08S.
5)    Winds ease quickly north of 08S and into the doldrums
6)    The doldrums will be growing in width and trending southward as the NE trades of the Northern Hemisphere strengthen and the SE trades of the southern Hemisphere weaken. The northern Doldrums boundary will be north of the Equator near 01N to 02N. The southern Doldrums boundary relocates to near 04S. There will be a high chance of significant calms developing in the doldrums.
7)    NE trade winds fill around 02N. NNE/NE moderate at 02N veering with distance north, to fresh NE winds from abeam of the Cape Verdes to 24N.
8)    High (1030mb) 38N/29W just west of the Azores.
9)    Low (1006mb) in the Gulf of Cadiz near 34N/09W. Strong N winds between the high to the west and this low. These winds extend south to the Canary Islands.
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General Forecast along race route
*** WEDNESDAY (18-MAR-2015) ***
* 45S to 50S and 65W to 55W *
WIND: N/NW 20-30 gusting 35,easing with time.
SEAS: 3-4m
WEATHER: Cloudy with a few scattered squalls possible.
* 45S to 40S and 60W to 50W *
WIND: N 15-25 at 45S, easing NE 10-15 at 40S. Generally lighter closer to 50W.
SEAS: 1-3m
WEATHER: Partly cloudy with scattered showers.
>>>>>
* 40S to 35S and 45W to 35W *
WIND: S/SE 15-25 west of 40W. Becoming light and variable east of 40W.
SEAS: 1-3m
WEATHER: Partly cloudy with showers and a few squalls.
* 30S to 35S and 45W to 35W *
WIND: S/SW 10-20 west of 40W. W/NW 10-15 east of 40W.
SEAS: 2-3m
WEATHER: Partly cloudy with showers.
>>>