In the 2012 Atlantic Rally for Cruisers the winning boats, the Class 40 Vaquita and the maxi Rán-Leopard, followed a similar route, which was suggested by routeing programs and made heading west a good option, but care needed to be taken as wave models indicated significant wave heights of up to 6m. Rán-Leopard managed to stay in strong favourable wind on their passage. Below is a brief description of how they did it. A small low crossed the Canary Islands giving strong northerly winds, which gave good reaching conditions to the west. The Azores High was well to the north and, as it moved south, the Trades gave a strong north-easterly flow. By the time the low was developing mid-Atlantic they had managed to cross the track of the low, Rán-Leopard maintaining the strong breeze to the north of the low. They had enough power to transit the light wind zone west of the low and get into tradewinds strengthening from high pressure in the west Atlantic. There was wind to the north and an area of light wind extending from the low all the way to the Leeward Islands, which necessitated the somewhat extreme-looking course approaching the finish from the north. Depression to dodge Staying north continued to give stronger wind; however, there was the development of a small depression to dodge – at one time this was given a 50 per cent chance of developing into a tropical storm. Rán-Leopard was by this time well to the west, but an area of light wind kept them north. For Vaquita, there was a period of light wind that made for a slow few hours, but as high pressure filled in from the north-west it was shorter than expected. Forecasts have become more accurate over the years and the rapid increase in onboard routeing programs takes out a lot of the guesswork. But it is a case of ‘junk in junk out’: unless the polars are good and the forecasts accurate the solutions will be questionable. And what it cannot take into account is the confidence level in the forecast and the risk a skipper is prepared to take. Rán-Leopard and Vaquita are high-performance racing yachts that can, with the right wind, keep ahead of weather systems. Their speed also gives them the advantage of being able to use a long-range forecast to cover the whole route. Northerly route pros Can be shorter as it follows close to the Great Circle route. Generally the further north you go, the stronger (but more variable) the wind. Getting north of a low gives a strong favourable wind whereas to the south the wind will be lighter and more variable. Cons The track of lows can vary between weather models or expectations change over time. Close to the south of the low will usually be light and variable wind while to the north can be strong to gale force. Strong and changing winds mean sea state can become large or even dangerous. In … Continue reading Taking the northerly route across the Atlantic; our meteorologist explains