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Tropical Storm Daphne (18P) Located West-Southwest of Fiji

28.6S 178.6W

April 3rd, 2012 Category: Tropical Storms

Tropical Storm Daphne (18P) - April 2nd, 2012

Tropical Storm Daphne (18P) - April 2nd, 2012

Enhanced image

Track of Tropical Storm Daphne (18P) - April 2nd, 2012 © Univ. of Wisconsin

Track of TS 18P

On April 2 at 0300 UTC (April 1, 11 p.m. EDT), Tropical Storm Daphne had maximum sustained winds near 35 knots (40 mph/64 kph). Those tropical-storm-force winds extend as far as 200 nautical miles (230 miles/370 km) from the center, making Daphne a good-sized storm, more than 400 nautical miles (460 miles/741 km) in diameter.

Daphne’s center was located about 340 nautical miles (391 miles/630 km) west-southwest of Suva, Fiji, near 19.8 South and 172.7 East. Daphne was moving to the east-southeast near 18 knots (20.7 mph/ 33.3 kph). Forecasters expect Daphne to continue moving to the east-southeast and maintain strength over the next day or two.

Hamish Causes Chemical and Oil Spills near Cape Moreton – UPDATE

March 12th, 2009 Category: Tropical Cyclones

Tropical Cyclone 18P (Hamish) - March 12th, 2009 © Univ. of Wisconsin

Tropical Cyclone 18P (Hamish) - March 12th, 2009

Pacific Adventurer Cargo

"Pacific Adventurer" Cargo

Oil slick on southern Queensland

Oil slick on southern Queensland

Tropical Cyclone 18P (Hamish), located approximately 485 nautical miles southeast of Cairns, Australia, has tracked westward at 9 knots over the past 6 hours.

Rough seas from the cyclone caused a container ship to lose 31 of its 50 containers of chemicals off eastern Australia on Wednesday morning, announced maritime officials. The lost containers held 620 tons of ammonium nitrate, a chemical used for fertilizers and explosives.

The ship also lost an unknown amount of fuel, creating an oil slick in the water about 7 nautical miles east of Cape Moreton. The slick is approximately 5.5 kilometers long and 550 meters wide, and will affect the beaches of southern Queensland.

Due to the rough seas, officials have been unable to contain the spill, reported the Australian Broadcasting Corporation (ABC); however, they will monitor and clean the slick and search for the lost containers.

Oil slick details

Oil slick details

With regards to environmental damage from the chemicals spilled in the bay, an expert from the University of Queensland’s Center of Marine Studies informed the ABC that the ammonium nitrate would not cause serious harm, noting that the only consequence of a similar previous fertilizer leak was a great increase in kelp growth.

However, other university marine experts expressed concern that if the containers leak, such an explosion in algal growth  could suffocate all other marine life in Moreton Bay and spread down the Gold Coast.

More ...

Hamish Downgraded to Category 2

March 11th, 2009 Category: Tropical Cyclones

Tropical Cyclone 18P (Hamish) - March 10th, 2009 © JTWC

Tropical Cyclone 18P (Hamish) - March 10th, 2009

TC 18P - March 9th, 2009 © JTWC

TC 18P - March 9th, 2009

Tropical Cyclone 18P (Hamish) has weakened to a Category 2.

The Australia Weather Bureau announced that as of 10 A.M. local time it was located about 185 kilometers (115 miles) east-northeast of Sandy Cape and moving northwest. It is expected to turn to the northwest later today and to continue to weaken.

The bureau issued a severe weather warning for “strong to gale-force winds and large waves” along the southeast Queensland coast.

Tropical Cyclone 18p (Hamish), located approximately 230 nautical miles northeast of Brisbane, Australia, has tracked westward at 4 knots over the past 6 hours.

Animated multispectral satellite and recent microwave imagery show a fully exposed low level circulation center (LLCC) tracking westward (see close-up) away from the deep convection which is sheared to the East.

The current position and motion are based upon the animated imagery as well as a QSCAT image.

The current intensity is based on Dvorak estimates ranging from 35 to 55 knots and the previously mentioned QSCAT image.

After reversing direction near 10/12Z the system has tracked slowly westward over the past 12 hours, and is forecast to track increasingly northwestward under the steering influence of a low- to mid-level subtropical ridge which is building west and south of the system. This development is evident on the 10/12z 700 mb analysis.

TC18p will maintain slow forward track speed as it battles competing steering flow between the primary influence to the west and south and northwesterly flow originating from a weaker ridge building to the Northeast.

Hamish will weaken steadily over the forecast period and ultimately dissipate as a significant tropical cyclone near TAU 48 while moving northwestward along the Australian coast. This forecast is based upon the majority of dynamic aids (with the exception of NGPS and WBAR) which depict the northwesterly motion and continued weakening trend.

Maximum significant wave height at 110000z is 20 feet.

Hamish Downgraded but Still Causing Severe Weather along Queensland Coast

March 10th, 2009 Category: Tropical Cyclones

Tropical Cyclone 18P (Hamish) - March 10th, 2009 © CIMSS-Univ. of Wisconsin

Tropical Cyclone 18P (Hamish) - March 10th, 2009

TC 18P - March 9th, 2009 © JTWC

TC 18P - March 9th, 2009

Tropical Cyclone 18P (Hamish) has been downgraded to category three, however a severe weather warning has been issued along the central and southeast coast of Queensland, the Australian Associated Press reported. Cyclone Hamish was about 160km east-northeast of Sandy Cape at 10am (AEST) todayand was moving at 10km/h slightly away from the coastline.

The Bureau of Meteorology announced that the weather alert for areas between Yeppoon and Tewantin had been cancelled, as the cyclone is expected to hover offshore for the next few days. However, a severe weather warning has been issued from Sandy Cape to Coolangatta, where gale force winds, rough seas and abnormally high tides are expected.

At the time of the Joint Typhoon Warning Center’s last report, issued at 0300Z, Hamish was located approximately 210 nautical miles north-northeast of Brisbane, Australia, and had tracked southeastward at 7 knots over the past 6 hours.

Recent animated METSAT imagery depicts a very intense system with deep convection primarily located on the south and eastern periphery of the storm.

The cyclone remains very intense as confirmed by Dvorak satellite intensity estimates from PGTW and ABRF, and although intensity is beginning to wane as vertical wind shear (VWS) adversely affects the system, the storm will maintain strength as a significant tropical cyclone throughout the forecast period.

Forecast track © Univ. of Wisconsin

Forecast track

Over the next 24 hours, the system will track generally eastward, while steadily weakening under increasing vertical wind shear associated with an approaching mid-level trough to the west.

As this weakening occurs, the storm will slow as the primary steering influence transfers from the deep layer ridging to the East, to the low to mid-level subtropical ridge to the South causing the storm to enter into a slow loop between TAU 24 and 36.

Maximum significant wave height is 24 feet.

Please click here for all articles on Tropical Cyclone Hamish.

Tropical Cyclone 18P (Hamish) Batters Queensland Coast but Not Expected to Make Landfall

March 9th, 2009 Category: Tropical Cyclones

Tropical Cyclone 18P (Hamish) - March 9th, 2009 © CIMSS-Univ. of Wisconsin

Tropical Cyclone 18P (Hamish) - March 9th, 2009

TC 18P - March 8th, 2009 © JWTC

TC 18P - March 8th, 2009

Tropical Cyclone Hamish battered the coast of Australia’s northern state of Queensland, disrupting coal exports and prompting authorities to evacuate islands popular with tourists, Bloomberg reports.

Australia’s Bureau of Meteorology issued a severe weather warning for the state’s central coast today, saying strong winds are creating dangerous surf and “abnormally high tides.”

At 4:46 p.m. local time, the cyclone was 245 kilometers (152 miles) northeast of Bundaberg, moving southeast parallel to the coast at 17 kilometers an hour, the weather bureau said.

The Department of Emergency Services informed that several islands, including Fraser, Lady Elliot and Heron Islands, were evacuated yesterday as a precaution.

The state government put emergency personnel, including search and rescue teams, on standby and sent 6,000 sandbags, flood barrier equipment and tarpaulins to towns along the central coast, Emergency Services Minister Neil Roberts said in a statement yesterday.

Forecast track - March 9th, 2009 ©  CIMSS-Univ. of Wisconsin

Forecast track - March 9th, 2009

Over the past 6 hours, Hamish has tracked southeastward at 8 knots. At the time of the latest JTWC update, it was located approximately 320 nautical miles north of Brisbane, Australia.

The track is forecast to turn eastward as Hamish moves around the mid-level subtropical ridge east of the cyclone.

TC 18P has begun to show signs of weakening over the past 12 hours. The Category 4 storm, with maximum sustained winds of 175 kilometers per hour, is forecast to continue weakening and is not expected to make landfall.

Increased interaction with the mid-latitude flow will begin to weaken the system throughout the forecast period, but TC 18P will remain fairly intense through TAU 48.

Sea surface temperatures will decrease through the forecast, adversely affecting the low-level circulation center. Dvorak satellite estimates from PGTW and ABRF agree with a 102 knot system. Animated satellite imagery shows an enlarging eye with expanding upper level cloud cover. Maximum significant wave height at 21 feet.

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