Weather forecast 18/03/2015
Race leader Cheminées Poujoulat has sailed north toward a high pressure ridge developing southwest of the Azores and have seen winds easing. They will soon be tacking east out of the ridge toward stronger winds and to begin heading toward the Gulf of Cadiz and Gibraltar Strait.
Neutrogena and GAES Centros Auditivos have several days of upwind sailing in the trade winds ahead of them. Winds will generally increase as they sail further north, and the direction will slowly veer allowing a more northly course.
We Are Water and One Planet, One Ocean & Pharmaton are sailing in moderate and building E’ly trade winds. These winds are expected to be relatively steady, however the doldrums will be shifting south and likely growing in the next few days, so a slower equatorial crossing is expected for them compared with the first 3 boats to pass through.
The generally lighter and unsettled conditions continue for Renault Captur on their route further west than that taken by the preceding boats. This unsettled pattern is expected to continue for them.
Spirit of Hungary is sailing in fresh N’ly winds behind high pressure to their northeast.
*** 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)
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
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
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.
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
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.
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.
WEATHER: Partly cloudy with showers.