Please select your home edition
Edition
Zhik Hydrobase

Audi Hamilton Island Race Week day 2 weather forecast

by Kenn Batt on 19 Aug 2012

Audi Hamilton Island Race Week day 2 weather from Kenn Batt.

Warnings: Nil Warnings current at time of issue.

Synoptic Discussion: A high pressure system in the Great Australian Bight will move eastwards over New South Wales today, extending a ridge of high pressure over Queensland. An upper level trough will move east over the interior of Queensland today.

Observations: At 0630hr the surface wind at Hamilton Island was 140 deg at 11kn, gusting 13kn (temp 18C, pressure 1019hPa). At Hardy Reef (further offshore at 19.7S 149.2E) the wind was 140deg at 11kn.

Forecast Winds for Surprise Rock (Read Discussion below)

0800:Mean dir 140d Dir range 160-120d MeanSp: 13kn Gust:17kn
1100:Mean dir 140d Dir range 160-120d MeanSp: 15kn Gust:20kn
1400:Mean dir 130d Dir range 150-110d MeanSp: 20kn Gust:27kn
1700:Mean dir 130d Dir range 150-110d MeanSp: 20kn Gust:26kn

Key: MeanDir: Mean wind direction Degrees True, DirRange: Wind direction range Deg T , MeanSp: mean wind speed in Knots, Gust: Maximum wind speed possible in the 10secs leading up to the hour in Knots.

Discussion: Pretty good model agreement for today with a S’ly surge pushing into the area this morning from about midday. The resulting winds, in the 15-20kn average speed range, are expected to hang in for your racing period today.

The cloud cover (middle level) is expected to increase this morning with some light rain developing this afternoon. If thick enough, it may dampen the wind speed field by 5kn or so. The S’ly surge may bring some low level cumulus cloud this afternoon and as such some shower activity is possible. The middle-level cloud (and light rain) is expected to move in from the NW, whilst any low level cloud (showers) will move in from roughly the SE.

Other Possibilities: 45% chance that wind speed doesn’t build to the forecast strengths above, due to middle level cloud and or surge not as strong as forecast?

30% chance that wind speeds are 2-3kn stronger than forecast this afternoon (neglecting localized topographic forcing of the wind speed field)

Note: Wind may be channelled and hence a little stronger at times between islands and out of some bays. Winds may be lighter and more flicky in the lee of Islands and land masses generally?

Natural wind oscillations: about 20deg and up to 60deg in the lee of land masses.

Note: that winds can be gusty and erratic over short time periods with any shower cloud that is close to you.

Weather: Possible early mist patches. Becoming cloudy during the day with some light rain developing this afternoon. Chance of a few showers later this afternoon.

Maximum land temperature at Hamilton Island: 21 degrees.

Wind Waves: 0.8 to 2.0metres, less in lee of land, more when wind wave opposes tidal current.

(Wave heights quoted are Significant wave heights).

Current: A weakening flood this morning then slack followed by a strong ebb this afternoon. Be extremely careful in channels, etc.

Remember: Tide floods to the south and ebbs to the north in the Whitsundays (there are many localized variations so be alert).

Tide at Shute Harbour: Low of 0.55m at 0533hr, High of 2.90m at 1139hr and Low of 0.51m at 1725hr

Sea Temperature: about 19 degrees.

Outlook: Monday 20th: Cloudy with some early light rain clearing to a fine day. Max temp 21deg. SE-E winds at 12-20kn (ave)

BIA 2016 Sydney Boat Show 660x82Bakewell-White Yacht DesignThe Water Shed - Ronstan

Related Articles

Audi extends IRC Australian Championship sponsorship
Yachting Australia is pleased to announce that Audi, will continue its support of the IRC Australian Championship Yachting Australia is pleased to announce that luxury carmaker, Audi, will continue its support of the IRC Australian Championship
Posted on 26 Aug 2012
Audi Hamilton Island Race Week - Performance Racing winners
Sydney yachtsman Matt Allen has been coming to Audi Hamilton Island Race Week on and off since 1984. Mat Allen's efforts have paid off with his latest Ichi Ban, a Farr 400, winning Performance Racing Division 1 at Audi Hamilton Island Race Week.
Posted on 26 Aug 2012
Audi IRC Australian Championship - New leader
The Audi IRC Australian Championship Class A has a new leader. The Audi IRC Australian Championship Class A has a new leader. Geoff Ross’ chartered TP52, Yendys, is three points behind Black Jack after today’s two windward/leeward races.
Posted on 24 Aug 2012
Audi Hamilton Island Race Week - Team Australia stranded
Audi Hamilton Island Race Week. T-shirts, shorts and wide smiles were the order of today. On the penultimate day of Audi Hamilton Island Race Week this morning’s gloomy forecast gave way to a glorious day of Whitsunday racing at its best as wet weather gear was packed away.
Posted on 24 Aug 2012
Audi Hamilton Island Race Week - South Pacific Trophy contest
Audi Hamilton Island Race Week Day 6 - There is an ever-present rivalry simmering away Audi Hamilton Island Race Week day six and there is an ever-present rivalry simmering away. The contest is on for the South Pacific Trophy, and three boat teams from New Zealand and Australia are going head-to-head.
Posted on 23 Aug 2012
Audi Hamilton Island Race week day 6 images by Andrea Francolini
Andrea Francolini not only captured the day's action but managed (as always it seems) to spot the whales! a foggy start to day 6 of Audi Hamilton Island Race Week. Once out on the race course Andrea Francolini not only captured the day's action but managed (as always it seems) to spot the whales!
Posted on 23 Aug 2012
Audi Hamilton Island Race Week - Long day at the office for some
Yesterday’s 63 nautical mile Club Marine Classic Long Race pitted divisions against the clock Yesterday’s 63 nautical mile Club Marine Classic Long Race pitted the super multihull, IRC and Performance Racing divisions against the clock.
Posted on 22 Aug 2012
Hamilton Island Race Week - Perfect pressure for Lindeman Island Race
Audi Hamilton Island Race Week Club Marine Classic Long Race and the Lindeman Island Race were held today Audi Hamilton Island Race Week Club Marine Classic Long Race and the Lindeman Island Race were held today, August 21st 2012. It was a bright and early start this morning, with the aim to bring most of the fleet ashore in time for this afternoon’s Olympic sailing team welcome home and tickertape parade.
Posted on 21 Aug 2012
Audi Hamilton Island Race Week 2012 - Francolini images
Audi Hamilton Island Race Week 2012 - Andrea Francolini was in the air and on the water at Hamilton Island again today. Top international photographer Andrea Francolini was in the air and on the water at Hamilton Island again today. Here's his view of the day.
Posted on 21 Aug 2012
Hamilton Island Race Week - Mixed bag on Day 3
Hamilton Island Race Week day 3 delivered a mixed bag, this morning’s showery and gusty 20kt breeze easing over the day Audi Hamilton Island Race Week 2012 third day delivered a mixed bag, this morning’s showery and gusty 20 knot breeze easing over the day as forecast, however there was enough in the tank to bring all divisions home in reasonable time. An overall win in today’s 30 mile race means the leading Audi IRC Australian Championship Class A boat is Geoff Ross’ chartered TP52 Yendys
Posted on 20 Aug 2012