sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : How to predict combination afternoon breezes
How to predict combination afternoon breezes

'Coastal sailing - how will I know what the wind will do this afternoon?'    .    Click Here to view large photo

How can you predict the effects of a sea breeze when combined with a coastal wind? Will this mean sail reefing this afternoon or a wind light enough to fly a spinnaker? Learn how to forecast coastal wind effect with these sailing secrets from John Jamieson (Captain John):

Winds caused by pressure differences create prevailing winds. After blowing for several hours, a prevailing wind aligns itself in a direction, parallel the coastline.

If local sea breezes are strong enough, they can modify the direction and speed of the prevailing coastal wind.

These effects might not be included in a marine weather forecast. Use these easy steps to make your own sailing weather forecast:

What causes a sea breeze? -  .. .  
1. Listen to the forecast prevailing wind

Tune in to the closest weather channel on your marine radio. Copy down the forecast coastal winds direction and speed.

For example, let's say that a northerly wind has been blowing for several hours along the coast. The marine forecast calls for northerly winds at 15 knots this afternoon.

2. Estimate the afternoon sea breeze

Make a determination as to whether to modify the forecast based on cloud cover. Cloudless days mean stronger afternoon sea breezes. Partly cloudy or overcast days indicate lighter sea breezes. In our example, you observe a cloudless sky, so you should expect a strong easterly sea breeze to fill in by early afternoon.

3. Combine directions and speeds

In the afternoon, the prevailing wind and sea breeze will combine to produce an average direction--northeasterly in the example. The strong sea breeze could increase the prevailing wind speed by 50%, or up to 22 1/2 knots.

Whether the winds increase that much depends on meteorological conditions, but you and your sailing crew will be ready in any case.

John Jamieson (Captain John) with 25+ years of experience shows you the no-nonsense cruising skills you need for safer sailing worldwide. Visit his website at www.skippertips.com and sign up for his FREE highly popular Sailing Tip of the Week. Discover how you can gain instant access to hundreds of sailing articles, videos, e-Books and more!


by John Jamieson

  

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

http://www.sail-world.com/index.cfm?nid=102775

6:04 AM Wed 10 Oct 2012GMT


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


Related News Stories:

21 Sep 2012  Seven annual sailing season inspections to save you money!
17 Sep 2012  Singapore Sailing Federation: Sail in the City
15 Sep 2012  Classic Asymmetric Sail Mistakes - And How to Avoid Them
26 Jul 2012  Loving your dinghy - Tips in dinghy dexterity
25 Jul 2012  Flotilla Sailing Holiday increases the sailing skills
23 Jul 2012  Boat Docking Classic event attracts the champions
20 Jul 2012  Jackstays and Jacklines: The options for the cruising sailor
06 Jul 2012  Ambition to be a serious boat builder? Here's your chance
03 Jul 2012  Long Distance Sailing Seminar, 18th August, London
13 Jun 2012  Medical Management for Mariners - new course starting
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