sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Louis Vuitton Cup: Predictwind - It's all in the building breeze again
Louis Vuitton Cup: Predictwind - It's all in the building breeze again


'Louis Vuitton Cup Final - Luna Rossa Challenge'    LUNA ROSSA/Studio Borlenghi-Borlengho/Butto

Predictwind indicates that winds will follow a typical San Francisco pattern but should be inside the limit for the start of racing at 1.10pm on Friday for Day 5 of racing in the Finals for the Louis Vuitton Cup between Italian Challenger Luna Rossa, and Emirates Team New Zealand.

With the racing back to it regular start time of 1310hrs the two feeds produced by Predictwind indicate that winds will be averaging 16-18kts, and will be gusting higher.

The key to the day is whether the wind will build at the rate the forecast indicates.

The top image shows the wind speed and direction at 1300hrs with one feed showing winds of 16kts while the other is at 18kts - these are only average speeds and gusts will be higher. There is a little variation in the forecast indicating a higher degree of certainty as to the outcome.

The key feature of the forecast is the breeze kicking in early at around 10kts and staying on a plateau until just before 11.00am, if that plateau is extended for a variety of reasons, then racing will take place in more moderate winds, with the increase coming later in the day. Peak breeze is expected just after 3.00pm at 23kts.

The first image shows the wind prognosis for the scheduled start of the second race, when one feed expected the wind to increase more quickly, while the other is a little more gradual. Peak windstrength later in the afternoon is 23kts - agreed by both Predictwind models.

Wind Map for 1315hrs on Friday 23 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.

Wind graph for 1310hrs on Friday 23 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.

Wind Map for 1415hrs on Friday 23 August, 2013 -  PredictWind.com   Click Here to view large photo

Wind graph for 1415hrs on Friday 23 August, 2013 -  PredictWind.com   Click Here to view large photo

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

Wind Chart for next two days starting on Friday 23 August, 2013 -  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=113460

1:00 PM Fri 23 Aug 2013GMT


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


Related News Stories:

19 Aug 2013  Louis Vuitton Cup: Predictwind - Strong winds despite changed start
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
MORE STORIES ...




News - USA and the World



Soling North American Championship concludes on Lake Erie by Canadian International Soling Association,






































Starboard Hatteras Wave Jam day 5 by American Windsurfing Tour,


















470 Men and Women Worlds - Champions decided in Santander by International 470 Class Association,








ISAF Sailing Worlds - 470 Women's medal race images by Thom Touw
ISAF Sailing Worlds, Santander: Scott all set to lift Finn world title
ISAF Sailing Worlds - 470 Men's medal race images by Thom Touw
ISAF Sailing Worlds, Santander - Aussies and Austrians claim 470 gold
ISAF Sailing Worlds, Santander: 470 awards images by Sail-World.com
ISAF Sailing Worlds, Santander - 470 medal race images by Jesus Renedo
Annapolis-to-Newport Race - 'What to Expect' Seminar to take place
Royal Cup Marina Ibiza - No racing on penultimate day
Belcher takes record fifth 470 World Championship
ISAF Sailing World Championships - Santander - Day 8 video highlights
2014 Great Lakes Team Racing Championship about to set off
2014 Etchells North American Championship - Day 1
2014 U.S. Multihull Championship - Day 1
2014 Chicago Match Cup - Repechage top four determined in final flight
J/24 World Championship - 35th anniversary preview
470 Men and Women Worlds - Santander medal race line-up confirmed
ISAF Sailing Worlds, Santander - Day 8 images by Sail-World.com
Royal Cup Marina Ibiza - Quantum Racing stumbles in coastal race
ISAF Sailing Worlds, Santander - Americans ready for 470 medal races
ISAF Sailing Worlds, Santander: Action ramps up with end zone in sight
Big Boat Series - It's not the size, it's the length   
ISAF Sailing World Championships Santander - Double French RS:X gold   
ISAF Sailing Worlds, Santander - Day 8 images by Sailing Energy   
ISAF Sailing Worlds - Finn leaders emerge from shifty Santander breeze   
ISAF Sailing Worlds, Santander - RS:X winner images by Barbara Sanchez   
ISAF Sailing Worlds, Santander - Rio 2016 470 spots awarded   
52 Super Series 2015 - Outlook looks hot for the 52 Super Series   
Starboard Hatteras Wave Jam - Another early start on day 4   
ISAF Sailing World - First entry leaves sailor's reputation in tatters   
2014 Chicago Match Cup - Four go through to quarter finals   
470 Men and Women Worlds - Champs take over leaderboard   
ISAF Sailing World Champ - Buckingham finishes with career-best result   
America's Cup: Oracle's Larry Ellison to step down as CEO   
Classic Yacht Regatta - Sonny takes top classic prize   
ISAF Sailing Worlds, Santander - Buckingham finishes with career best   
ISAF Sailing Worlds, Santander - Rio 2016 RS:X spots claimed   
ISAF Sailing Worlds - Leaderboards shaping up in Santander + Video   
ISAF Sailing Worlds, Santander - Giles Scott continues to extend lead   
ISAF Sailing Worlds, Santander - Day 7 images by Sailing Energy   
ISAF Sailing Worlds - Laser and Radial winner images by Jesus Renedo   


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.
XLXL NEW US
LocalAds   DE  ES  FR  IT