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Sail-World.com : Louis Vuitton Cup: Predictwind - Lower breeze for second day of Finals
Louis Vuitton Cup: Predictwind - Lower breeze for second day of Finals


'Emirates Team NZ flies high in Race 1 of the Louis Vuitton Cup Final'    Chuck Lantz ©    Click Here to view large photo

Predictwind indicates that winds will be just under the limit for racing in the second and third round of the Finals for the Louis Vuitton Cup between Italian Challenger Luna Rossa, and Emirates Team New Zealand when they meet on Sunday August 18, 2013 in San Francisco.

The first 25 minute race is due to start at 1310hrs local time, with the second about an hour later.

The top image shows the wind speed and direction at 1315hrs with it building to around 18ts - these are only average speeds and gusts will be higher. The breze should be under the limit for the fits race of the day but will build to over 20kts by 2.00pm - the time for the second race start, however not to the levels seen yesterday. The wind limit is believed to be 19-20kts.

Predictwind - Wind Map for 1300hrs on Sunday 18 August 2013 -  PredictWind.com   Click Here to view large photo

The second image shows a graphic representation of the wind build - confirming the numbers for the prognosis.

Predictwind - Wind Graph for 1315hrs on Sunday 18 August 2013 -  PredictWind.com   Click Here to view large photo

The next two images are showing the same style of information except for an hour later around the time of the second race for the day. in the intervening time winds will increase a little but should not delay racing - however conditions will be marginal for racing in terms of the wind limit.

Two weather feeds are used by Predictwind, the key to the accuracy of the forecast lies with the graphs, as when the two lines for the two feeds are quite close together and following each other in the trend, then the likelihood of the forecast is high. If there is separation to any marked degree, then there still some issues to be resolved but usually 24 hours from the race they are well aligned.

Predictwind - Wind Map for 1400hrs on Sunday 18 August 2013 -  PredictWind.com   Click Here to view large photo

Predictwind - Wind Graph for 1400hrs on Sunday 18 August 2013 -  PredictWind.com   Click Here to view large photo

The Predictwind model takes various weather feeds and then polishes these, part of this process is factoring in the effect of local topography on the breeze - well demonstrated by the image with the funneling of the breeze.

Developed by former Olympian, Jon Bilger (470, 1992), PredictWind application was used by the Swiss team Alinghi to win the 2003 and 2007 America's Cups, and has become the leading wind system used by racing and recreational sailors around the world. It is available on a subscription basis and also with a free forecast option.

A mobile app for Android and iPhone is available and PredictWind is probably the most used app on the Sail-World iPhone.

Real time local wind observations have been added as further functionality.

You can check the weather anywhere in the world, and get a five day forecast, plus a variety of other features and functions of PredictWind. The app is synchronised with your PC, so that your latest set of locations are always available without resetting each time you change a device.


by Richard Gladwell

  

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http://www.sail-world.com/index.cfm?nid=113334

9:05 AM Sun 18 Aug 2013GMT


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Related News Stories:

18 Aug 2013  Louis Vuitton Cup: Top breeze predicted for first day of Finals
21 Jul 2013  America's Cup: Big breeze predicted for Luna Rossa vs Emirates Team NZ
13 Jul 2013  America's Cup: Predictions for Luna Rossa versus Emirates Team NZ
02 Jul 2013  Final bulletin on schooner Nina plus Predictwind forecasts for Tasman
06 Jun 2013  Auckland Fiji Race: First racing monohull finishes in Fiji
05 Jun 2013  Auckland Fiji Race: TeamVodafoneSailing slices two hours off record
05 Jun 2013  Auckland to Fiji Race: Injury confirmed assisting MOB crew recovery
04 Jun 2013  Auckland to Fiji Race: Man overboard incident reduces fleet to four
04 Jun 2013  Auckland Fiji Race: Triple reef as headwinds slow leaders' progress
03 Jun 2013  Auckland to Fiji Race: Equilibrium withdraws heads back to New Zealand
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