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


'Surface chart 20th August - Audi Hamilton Island Race Week 2013'   

Audi Hamilton Island Race Week - Daily weather forecast issued by Kenn Batt at 0545hr for Tuesday 20th August 2013.

A weak high [1015 hPa] over the southern Coral Sea is expected to move slowly eastwards, maintaining a weak ridge onto the north tropical coast of Queensland. A surface trough of low pressure is expected to move eastward over the Islands this morning. A cooler southerly surge is expected over the area early tomorrow morning.

Observations:
At 0530hr the surface wind at Hamilton Island was 320 deg at 15kn, gusting 19kn (temp 21C, pressure 1013hPa). At Hardy Reef (further offshore at 19.7S 149.2E) the wind was 290deg at 10kn.

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

Tuesday
0800:MD210 DR(230-190) MS10 SR07-15kn could be 290-310deg at 8-14kn
1000:MD180 DR(200-160) MS12 SR08-17kn
1200:MD140 DR(160-120) MS12 SR08-17kn
1400:MD135 DR(155-115) MS11 SR07-16kn
1600:MD120 DR(140-100) MS10 SR06-15kn
1800:MD125 DR(145-105) MS09 SR05-13kn
2000:MD130 DR(150-110) MS09 SR05-13kn
2200:MD150 DR(170-130) MS09 SR05-13kn
2400:MD170 DR(190-150) MS10 SR06-14kn

Wednesday
0200:MD180 DR(200-160) MS15 SR10-20kn
0400:MD160 DR(180-140) MS22 SR18-27kn
0600:MD160 DR(180-140) MS22 SR18-27kn

Note: The wind in the Whitsunday Passage is expected to be about 2-5kn stronger than above and could be about 10-20deg more right at times.

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.

Forecast chart for 10pm 20th August - Audi Hamilton Island Race Week 2013 -    

Discussion:
A trough of low pressure is expected to pass over the Islands at about 0800hr this morning (+/- 1.5hr). Ahead of the trough wind will be 290-310deg at 8-14kn (ave) then becoming as forecast above. There is a 65% chance that the wind speeds associated with the change are 3kn stronger than forecast, say between 0800 and 1000hr before easing back to forecast values?

A cooler southerly surge is expected to arrive between midnight and 0300hr tomorrow morning.

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:
Early low cloud clearing to a mostly sunny day.
Maximum land temperature at Hamilton Island: 25 degrees.
Sea Temperature: about 21-22 degrees.

Wind Waves:
0.4 to 1.0 metres on Tuesday, rising to 1 to 2metres on Wednesday morning. 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 ebb this morning and afternoon followed by slack water and then a strong flood developing this evening then becoming slack. A strong ebb developing early Wednesday, before a strong flood later.

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: Tues: High of 3.05m at 0957hr, Low 0.08m at 1545hr and High 4.00m at 2222hr.
Wed: Low 0.30m at 0440hr and High 3.12m at 1042hr. (know your time offsets for other locations around the race courses)

Outlook:
Thursday: SE at 15 to 20 kn (ave) easing to 12 to 16kn (ave) during the afternoon.


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=113402

12:17 AM Tue 20 Aug 2013GMT


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

Click for further information on
2013 Audi Hamilton Island Race Week 2013

Related News Stories:

20 Aug 2013  Audi Hamilton Island Race Week - Pioneers return
20 Aug 2013  Audi Hamilton Island Race Week - Hooligan´s wreak havoc in IRC fleet
20 Aug 2013  Audi Hamilton Island Race - Tiny Tassie boat triumphing in paradise
20 Aug 2013  Pioneers return to Audi Hamilton Island Race Week
20 Aug 2013  Audi Hamilton Island Race Week - Full results for day 2
20 Aug 2013  Audi Hamilton Island Race Week - Might there be sheep in the paddock?
20 Aug 2013  Audi Hamilton Island Race Week - Day 1 action shots
19 Aug 2013  Audi Hamilton Island Race Week - Shifting winds and courses
19 Aug 2013  Audi Hamilton Island Race Week - Moran, Kwong and Bennett Takeover
19 Aug 2013  Audi Hamilton Island Race Week Day 2 - Weather forecast
MORE STORIES ...






News - USA and the World





















A complete recap of the most successful Melges 20 World Championship by International Audi Melges 20 Class Association,




ISAF Santander - Upwards path for Austrian women's 470 crew + video by Luissa Smith, International 470 Class Association,


























2014 Rolex Big Boat Series - Farr 40 Day 4 by William Wagner, San Francisco
















ISAF Sailing World Championships - Solid Day 3 for US Sailing Team
ISAF Sailing World Championships - Day 3 images by Jesus Renedo
Marseille One Design 2014 - GC32 Armin Strom blitzes final day
Volvo Ocean Race 2014-15 - Una Etapa 0 complicada para todos
Santander 49ers: Olympic Gold Medallist says two into 90 does not go!! *Feature
GBR aiming for first ever Nacra 17 Games berth at Santander Worlds
Volvo Ocean Race: Man and sail overboard as Leg 0 serves up drama
ISAF Sailing World Championships Santander 2014 – Images by Dan Ibsen
Santander Worlds – already a spectator success
ISAF Sailing World Championships Santander 2014 - Day 3 morning report
Volvo Ocean Race 2014-15 - Tales from the extreme
Volvo Ocean Race: Latest starter wins opening race
2014 J/70 World Championship - Healy, Abdullah, Becker and Borges win
2014 Rolex Big Boat Series - Full-blown, once again
ISAF Worlds - Americans jump up Laser and Laser Radial leaderboard
2014 Rolex Big Boat Series - Farr 40 Day 3
America's Cup: Luna Rossa sailing with two foiling AC45's + Video
Extreme Sailing: Emirates Team NZ retain second overall
ISAF Sailing Worlds, Santander - Rio Olympic Laser spots snapped up
Rolex Swan Cup - All set for final showdown
Upper Midwest sailors need help to take it to the next level   
ISAF Sailing World Championships - RS:X action begins in Santander   
ISAF Sailing Worlds, Santander - Americans rise in Laser and Radial   
Extreme Sailing Series - A remarkable penultimate day’s racing + Video   
Marseille One Design - GC32 GDF Suez unstoppable in the light   
Rolex Swan Cup - Day 3 images by Carlo Borlenghi   
ISAF Sailing World Championships - Images of the leaders in Santander   
Rolex Big Boat Series - Good day for Double Trouble   
Rolex Big Boat Series - Day 2 images by Erik Simonson   
Royal Cup Marina Ibiza - TP52 fleet ready for tricky race tracks   
Rolex Big Boat Series - Plenty maintains lead   
2014 Asia Pacific Student Cup - Count down begins   
Extreme Sailing Series: Live coverage of Day 3 - view here   
Volvo Ocean Race 2014-15 - Going away   
Volvo Ocean Race 2014-15 - Practice makes perfect   
2014 J/70 World Championship - Contrasting conditions on Day 4   
Rolex Big Boat Series - 50 years of big boat racing: a retrospective   
2014 Rolex Big Boat Series - Day 2   
Snipe Western Hemisphere and Orient Champ: Rios takes the Championship   
Volvo Ocean Race: Leg Zero signals start of the significant racing   


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