sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Audi Hamilton Island Race Week Day 4 - Weather forecast
Audi Hamilton Island Race Week Day 4 - Weather forecast


'Forecast chart for 4pm 22nd August - Audi Hamilton Island Race Week 2013'   

Audi Hamilton Island Race Week - Daily Weather Forecast issued by Kenn Batt at 0600hr for Thursday 22nd August 2013.

Nil Warnings current.

Synoptic Discussion:
A weak ridge of high pressure lies over the race area.

Observations:
At 0600hr the surface wind at Hamilton Island was 180 deg at 09kn, gusting 11kn (temp 18C, pressure 1017hPa). At Hardy Reef (further offshore at 19.7S 149.2E) the wind was 110deg at 07kn.

Forecast Winds for Surprise Rock (to E of Hamilton Island) (Read Discussion below)

0800:MD160 DR(180-140) MS08 SR05-12kn
1000:MD140 DR(160-120) MS10 SR06-14kn
1200:MD130 DR(150-110) MS11 SR07-15kn
1400:MD110 DR(130-090) MS12 SR08-16kn
1600:MD100 DR(120-080) MS13 SR09-17kn
1800:MD090 DR(110-070) MS12 SR08-16kn

Note: The wind in the Whitsunday Passage, whilst in the directional range of 180-140deg, could be about 2kn stronger than forecast above and could be about 10-20deg more right at times due to funnelling.

Key: First column is mean wind direction in deg Magnetic (MD). It is the 10min average (mean) value at a height of 10m above the water leading up to the hour quoted. The second column is the directional range (DR) of the wind direction in deg Mag. This takes into account the natural oscillation of the wind and is a function of the atmospheric stability, etc. The third column is the mean speed (MS) in knots (kn) and is the average 10min value leading up to the hour quoted at a height of 10m above the water. The last column is the wind speed range (SR) in knots and is the lowest wind speed to highest wind speed in the 10min leading up to forecast hour.

Surface chart 22nd August - Audi Hamilton Island Race Week 2013 -    

Discussion
The gradient wind is expected to shift from about 160deg at 10kn this morning to 120deg at 12kn during the afternoon. As such the surface wind is expected to commence from 150deg and trend left during the day.
The difficult questions are however:
1. How far left? The weak sea breeze component should assist the left trend. For your racing period a max left of 090deg is possible.
2. How quickly will the direction trend left? I’m happy with forecast above however there is a 60% chance that the direction shifts more slowly than above.
3. How strong the winds? Pretty happy with the wind ranges above, however there is a 55% chance that the wind speeds could be about 2kn stronger this afternoon? The sea breeze component should assist here.

Wind direction and speed is expected to be more variable than forecast above over parts of the race course due to changing topographical profiles i.e. wind speed enhancement (+2 to 5kn) due to funneling out of bays, some speed enhancement and wind directional changes around headlands and in passages. Lighter and more variable winds in the lee of islands, etc

Natural wind direction oscillations: around 20 to 30 deg, more/less due to topographical influences.

Weather
Dry and partly cloudy.
Maximum land temperature at Hamilton Island: 23 degrees.
Sea Temperature: about 21-22 degrees.

Wind Waves:
0.4 to 0.8 metres.

Heights less in lee of land and more when wind wave opposes tidal current.
(Wave heights quoted are Significant wave heights).

Tidal Current: A strong flood first up this morning followed by slack water and then a strong ebb developing this afternoon.
Be extremely careful in narrow channels, etc.

Remember: In general tidal currents flood to the south and ebb to the north in the Whitsundays. There are many localized variations however so be very vigilant.

Tide at Shute Harbour:
Low 0.31m at 0520hr, High of 3.14m at 1127hr, and Low 0.29m at 1716hr.

(know your time offsets for other locations around the race courses)

Outlook
Friday and Saturday: SE to E at 8 to 14 kn (ave).


by Kenn Batt

  

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

http://www.sail-world.com/index.cfm?nid=113504

9:46 PM Wed 21 Aug 2013GMT


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

Click for further information on
2012 Audi Hamilton Island Race Week

Related News Stories:

14 Dec 2012  Audi Hamilton Island Race Week 2013 - 'First Fleeters' search is on
30 Aug 2012  Hamilton Island Race Week - Planning ahead for 2013
30 Aug 2012  'Best of Audi Hamilton Island Race Week' images by Andrea Francolini
27 Aug 2012  Audi Hamilton Island Race Week - Melges 32 2 Unlimited success
26 Aug 2012  Audi extends IRC Australian Championship sponsorship
26 Aug 2012  Audi Hamilton Island Race Week - Cruising and Non Spinnaker results
26 Aug 2012  Audi Hamilton Island Race Week - Performance Racing winners
25 Aug 2012  Audi Hamilton Island Race Week - Victoire successfully defends title
25 Aug 2012  Audi Hamilton Island Race Week: Whales and racing images by Francolini
25 Aug 2012  Audi IRC Australian Championship - Back to back wins for Hooligan
MORE STORIES ...






News - USA and the World











































Formula Windsurfing Youth and Master Worlds overall by International Windsurfing Association,












Bakewell-White supermaxi designed to take Transpac's Barn Door Trophy *Feature by Richard Gladwell Ssail-World.com/nz,












Volvo Ocean Race: Eight new crew members named by teams
Volvo Ocean Race: New additions to Spanish team announced
2014 Cape Panwa Hotel Phuket Raceweek - Phuket Island is ready to host
PWA Awaza World Cup - Cyril Moussilmani and Delphine Cousin on top
Foiling Week - Moth Class Italian Open Championship Day 2
America's Cup: Luna Rossa foiling in AC45s at their Italian base
Star World Championship - Germans claim dramatic win in Malcesine
PWA Awaza World Cup - Down to the wire in Turkmenistan
Route Halifax Saint-Pierre - Off to France!
Nacra 17 Europeans - La Grande Motte back in Olympic classes arena
Stena Match Cup Sweden - Hansen hat trick in Marstrand + Video
Route Halifax Saint-Pierre Race keeps an eye on Arthur
World Match Racing Tour: See the Finals replay at the Stena Match Cup
Newport International Boat Show unveils exciting 'At The Helm' Program
Stena Match Cup Sweden - First blood to Hansen over Canfield + Video
Star World Championship - Americans claim race win in Malcesine
PWA Awaza World Cup - Weather halts action on day 4
Clipper Race - Henri Lloyd wins OneDLL Cup into Den Helder
Clipper Race - Close match racing in closing stages of the OneDLL Cup
Volvo Ocean Race: Spanish play catch-up with under 100 days to go
World Match Racing Tour: Catch the live action at the Stena Match Cup   
Finn Junior Worlds - Battle for the Jorge Bruder Silver Cup   
Mobiles drive traffic - 72% increase in Sail-World.com page view *Feature   
British Open Dragon Championship finale at Royal Lymington preview   
2014 Cape Panwa Hotel Phuket Raceweek - Phuket is ready to host   
PWA Awaza World Cup - Valerie Ghibaudo hits back on day 3   
Star World Championship - Hard fought win on day 4 + Video   
Stena Match Cup Sweden - Action-packed match racing + Video   
Oceans of Hope yacht arrives in Portsmouth   
Bell's Beer Bayview Mackinac Race - Registration details   
RORC Transatlantic Race - Polishing up the silver   
Vic-Maui International Yacht Race - First start to lead off busy day   
Anna Tunnicliffe competing at the CrossFit Mid-Atlantics + Video   
18ft Skiff Europeans: Winning days at Lake Garda   
Clipper Race - Choppy conditions as fleet closes in on Den Helder   
Lightning Youth World Championship - Final day   
2014 Star Class World Championship - Day 3   
America's Cup: Dean Barker interviewed on the current state of the Cup   
PWA Awaza World Cup - Delphine Cousin draws first blood   
Stena Match Cup Sweden - On a roll in Marstrand + Video   


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