sail-world.com
 
 
News Home Video Gallery Photo Gallery
Sail-World.com : Louis Vuitton Cup: Predictwind - Strong winds despite changed start
Louis Vuitton Cup: Predictwind - Strong winds despite changed start


'Luna Rossa Challenge 2013 Louis Vuitton Cup Final - Race 2'    Red Moon/ Studio Borlenghi / Borlenghi-Butto    Click Here to view large photo

Predictwind indicates that winds will be just under the limit for racing in the third and fourth races of the Finals for the Louis Vuitton Cup between Italian Challenger Luna Rossa, and Emirates Team New Zealand when they meet on Monday August 19, 2013 in San Francisco.

On Sunday, official bought the start time forward by an hour to try and get lighter winds and enable racing within the limit of 18-19kts (depending on the state of the tide). The first 25 minute race is due to start at 1210hrs local time, with the second about an hour later.

The top image shows the wind speed and direction at 1215hrs with one feed showing winds of 15kts while the other is at 18kts - these are only average speeds and gusts will be higher. There is a small amount of variation in the prognosis, with the point of disagreement being in the rate of increase of the breeze, rather than the actual strength. The breeze peaks at about 1500hrs (3.00pm local time) at a speed of around 23kts - well in excess of the wind limit, but interestingly within the limit of 25kts for the America's Cup.

The prediction indicates that the winds should just be within the limit for the first race, but the second race of the day is marginal.

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

Predictwind - Wind Map for 1215hrs on Monday 19 August, 2013. The right hand frame shows the second weather feed expecting slightly lighter winds at this time -  PredictWind.com   Click Here to view large photo

Predictwind - Wind Graph for 1215hrs on Monday 19 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. Winds are creeping very close to the limit, and bearing in mind that these are only average windspeeds with no accounting for gusts, it is likely that the wind limit will be exceeded on the current wind information.

Predictwind - Wind Map for 1315hrs on Monday 19 August, 2013. The right hand frame shows the second weather feed expecting slightly lighter winds at this time. -  PredictWind.com   Click Here to view large photo

Predictwind - Wind Map for 1315hrs on Monday 19 August, 2013 -  PredictWind.com   Click Here to view large photo

The fifth chart shows the wind exceptions for the following day, which shows a reduction in the strength of the breeze, allowing officials some scope to catch-up if required.

Predictwind - Weather predictions for Monday 19 and Tuesday 20, August, 2013 - San Francisco -  PredictWind.com   Click Here to view large photo

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.

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

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=113374

12:10 PM Mon 19 Aug 2013GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.


Related News Stories:

18 Aug 2013  Louis Vuitton Cup: Predictwind - Lower breeze for second day of Finals
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
MORE STORIES ...




News - USA and the World

Belcher and Ryan lead from the start in Hyeres by Rob Kothe and the Sail-World Team,












































America's Cup Book Review: Winging It - Oracle Team USA's comeback *Feature by Richard Gladwell Sail-World.com/nz,




Rolex China Sea Race 2014 - nip and tuck for IRC honours by RHKYC and Guy Nowell, Sail-World Asia, Hong Kong


















Alpari World Match Racing Tour: Can Williams surpass Gilmour's record?
Coastal Cup sets sail from Alameda June 11
PWA Cold Hawaii World Cup - Massive support from the local community
Les Voiles de St. Barth - Weather factors in + Video
HUD Vision: An interview with Afterguard Marine’s Alex Moret *Feature
ISAF Sailing World Cup Hyeres - US Sailing Team ready for action
Volvo Ocean Race - Dongfeng Race Team first official qualifier
Springtime boat buyers need to take care of a few key things
ISAF Match Race Rankings for 16 April 2014
ISAF Sailing World Cup Hyeres – World’s best to race on French Riviera
Rolex China Sea Race – Fleet off to a clean start
America's Cup: Expected de Ridder penalty should be reduced *Feature
World Youth Sailing Week – Second edition officially presented + Video
Rolex China Sea Race - Sailing classic returns
Les Voiles de St Barth – Fired up for battle
CNN Mainsail Down Under for the 75th JJ Giltinan Trophy - 18ft skiffs
Volvo Ocean Race: North Sails on outfitting the Volvo 65
Image gallery: James Cook High's Royal encounter on Steinlager 2 *Feature
Volvo Ocean Race - Maersk Line named shipping partner
Congressional Cup - Victory for Taylor Canfield and crew
SSV Oliver Hazard Perry joins America's Tall Ship fleet + Video   
2014 Halifax – Saint-Pierre Ocean Race   
Oyster Regatta Antigua - Glorious conditions prevail on final day   
WWA Pro Card Qualifier - Pro Cards earned at Freedom Wake Park   
Christmas Caribbean Rally - Top class sailors to compete   
Earth Day boater tips   
Anna Tunnicliffe - from CrossFit to Extreme 40's   
Charleston Race Week - Photos by Chris Howell   
Image Gallery: Stratis SL33 flies on the Waitemata   
Audi Melges 20- Sperry Topsider Charleston Race Week - Light final day   
Clipper Round the World Yacht Race - PSP Logistics prepares for USA   
ISAF Sailing World Cup Hyères - Crème of the crop to compete   
Congressional Cup: Luna Rossa makes podium in first event   
Int 14 World Championships 2015 launch new event website   
International Optimist Regatta Clinic and Team Race - Register now!   
Congressional Cup: World top rankers finish that way in Long Beach   
Sperry Top-Sider Charleston Race Week Day 3 finale   
America's Cup: Gino Morrelli outlines the new AC62 design   
Doyle Sails New Zealand signs Andrew Brown as One Design Manager   
America's Cup: Dean Barker's Blog - A sail with the Duke and Duchess *Feature   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News





Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
X6XL NEW US