Tag Archives: Western Australia

Tropical Cyclone Olga Continues to Weaken

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Tropical Cyclone Olga continued to weaken on Tuesday as it moved over the South Indian Ocean north of Western Australia. At 11:00 p.m. EDT on Tuesday the center of Tropical Cyclone Olga was located at latitude 19.3°S and longitude 115.8°E which put it about 265 miles (435 km) north-northeast of the Exmouth, Australia. Olga was moving toward the south-southwest at 4 m.p.h. (6 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 1003 mb.

An upper level trough over the South Indian Ocean west of Australia continued to produce strong northwesterly winds that blew toward the top of Tropical Cyclone Olga’s circulation. Those winds caused strong vertical wind shear. The strong upper level winds blew the tops off of most of the thunderstorms in Tropical Cyclone Olga. There were still a few thunderstorms in bands in the southeastern periphery of Olga’s circulation. Bands in the other parts of Tropical Cyclone Olga consisted primarily of showers and lower clouds.

The strong vertical wind shear also caused the pattern of wind speeds around Tropical Cyclone Olga to be asymmetrical. Winds to tropical storm force extended out 100 miles (160 km) in the southern half of Olga’s circulation. Winds to tropical storm force only extended out 35 miles (55 km) in the northern half of Tropical Cyclone Olga.

Tropical Cyclone Olga will move through an environment that will be unfavorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 28°C. However, the upper level trough west of Australia will continue to cause strong vertical wind shear. The strong wind shear will cause Tropical Cyclone Olga to continue to weaken.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga toward the southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will be north of Exmouth in 24 hours.

Tropical Cyclone Olga was already bringing gusty winds to the area around Barrow Island. A weather station on Barrow Island reported a sustained wind speed of 36 m.p.h. (58 km/h) and a wind gust of 46 m.p.h. (74 km/h).

Tropical Cyclone Olga Weakens

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Tropical Cyclone Olga weakened over the South Indian Ocean north of Western Australia on Monday. At 11:00 p.m. EDT on Monday the center of Tropical Cyclone Olga was located at latitude 17.5°S and longitude 117.2°E which put it about 250 miles (400 km) north of the Karratha, Australia. Olga was moving toward the southwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 994 mb.

Strong vertical wind shear caused Tropical Cyclone Olga to weaken steadily on Monday. An upper level trough over the South Indian Ocean west of Australia produced strong northwesterly winds that blew toward the top of Olga’s circulation. Those winds caused strong vertical wind shear. The wind shear caused the distribution of thunderstorms in Tropical Cyclone Olga to become asymmetrical. Thunderstorms were occurring in bands in the southeastern part of Olga’s circulation. Bands in the other parts of Tropical Cyclone Olga consisted primarily of showers and lower clouds.

The strong vertical wind shear also caused the pattern of wind speeds around Tropical Cyclone Olga to become asymmetrical. Winds to tropical storm force extended out 145 miles (235 km) in the southern half of Olga’s circulation. Winds to tropical storm force only extended out 75 miles in the northern half of Tropical Cyclone Olga.

Tropical Cyclone Olga will move through an environment that will be unfavorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 28°C. However, the upper level trough west of Australia will continue to cause strong vertical wind shear. The strong wind shear will cause Tropical Cyclone Olga to continue to weaken.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga toward the southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will gradually move closer to the coast of Western Australia.

Tropical Cyclone Olga brought strong gusty winds to the area around Rowley Shoals. A weather station on Rowley Shoals reported a sustained wind speed of 48 m.p.h. (78 km/h) and a wind gust of 61 m.p.h. (98 km/h). Olga could bring strong gusty winds to Barrow Island during the next 24 hours.

Tropical Cyclone Olga Rapidly Intensifies to Equivalent of Cat. 4 Hurricane

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Tropical Cyclone Olga rapidly intensified to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale during Sunday morning. At 11:00 a.m. EDT on Sunday the center of Tropical Cyclone Olga was located at latitude 15.6°S and longitude 119.1°E which put it about 365 miles (590 km) north of the Port Hedland, Australia. Olga was moving toward the south-southwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 140 m.p.h. (235 km/h) and there were wind gusts to 165 m.p.h. (265 km/h). The minimum surface pressure was 939 mb.

Tropical Cyclone Olga rapidly intensified to the equivalent of a Category 4 hurricane over the South Indian Ocean north of Western Australia during Sunday morning. A small circular eye with a diameter of 10 miles (16 km) was present at the center of Olga’s circulation. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Tropical Cyclone Olga. Storms near the core generated strong upper level divergence that pumped mass away from the tropical cyclone. The removal of large quantities of mass caused the surface pressure to decrease rapidly.

The circulation around Tropical Cyclone Olga was small. Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Olga’s circulation. Winds to tropical storm force extended out 85 miles (135 km) from the center of circulation. The Hurricane Intensity Index (HII) for Tropical Cyclone Olga was 28.3. The Hurricane Size Index (HSI) was 6.1 and the Hurricane Wind Intensity Size Index (HWISI) was 34.4.

Hurricane Olga will move into an environment that will become unfavorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 28°C. An upper level trough over the South Indian Ocean will approach Tropical Cyclone Olga from the west. The trough will produce strong westerly winds that will blow toward the top of Olga’s circulation. Those winds will cause the vertical wind shear to increase. Tropical Cyclone Olga will start to weaken when the wind shear increases. Olga could weaken rapidly because of the small size of its circulation.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga toward the southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will move parallel to the coast of Western Australia. Olga is forecast to turn more toward the west-southwest on Monday. Tropical Cyclone Olga is expected to have a minimal impact on Western Australia. Olga will bring gusty winds and large waves to the area around Rowley Shoals.

Tropical Cyclone Olga Rapidly Intensifies to Equivalent of a Major Hurricane

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Tropical Cyclone Olga rapidly intensified to the equivalent of a major hurricane on Saturday night. At 5:00 a.m. EDT on Sunday the center of Tropical Cyclone Olga was located at latitude 15.0°S and longitude 119.1°E which put it about 405 miles (655 km) north of the Port Hedland, Australia. Olga was moving toward the southwest at 5 m.p.h. (8 km/h). The maximum sustained wind speed was 115 m.p.h. (185 km/h) and there were wind gusts to 145 m.p.h. (235 km/h). The minimum surface pressure was 958 mb.

Tropical Cyclone Olga rapidly intensified to the equivalent of a major hurricane over the South Indian Ocean north of Western Australia on Saturday night. A small circular eye with a diameter of 10 miles (16 km) was present at the center of Olga’s circulation. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Tropical Cyclone Olga. Storms near the core generated strong upper level divergence that pumped mass away from the tropical cyclone. The removal of large quantities of mass caused the surface pressure to decrease rapidly.

The circulation around Tropical Cyclone Olga was small, but it was symmetrical. Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Olga’s circulation. Winds to tropical storm force extended out 75 miles (120 km) from the center of circulation. The Hurricane Intensity Index (HII) for Tropical Cyclone Olga was 20.6. The Hurricane Size Index (HSI) was 7.2 and the Hurricane Wind Intensity Size Index (HWISI) was 27.8.

Hurricane Olga will move into an environment that will become unfavorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 28°C. An upper level trough over the South Indian Ocean will approach Tropical Cyclone Olga from the west. The trough will produce strong westerly winds that will blow toward the top of Olga’s circulation. Those winds will cause the vertical wind shear to increase. Tropical Cyclone Olga could continue to intensify during the next few hours, but Olga will start to weaken when the wind shear increases.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga toward the southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will move parallel to the coast of Western Australia. Olga is forecast to turn more toward the west-southwest on Monday. Tropical Cyclone Olga is forecast to have a minimal impact on Western Australia. Olga will bring gusty winds and large waves to the area around Rowley Shoals.

Tropical Cyclone Olga Strengthens to Equivalent of a Hurricane/Typhoon

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Tropical Cyclone Olga strengthened to the equivalent of a hurricane/typhoon over the South Indian Ocean northwest of Australia on Saturday. At 5:00 p.m. EDT on Saturday the center of Tropical Cyclone Olga was located at latitude 14.5°S and longitude 119.6°E which put it about 435 miles (700 km) north of the Port Hedland, Australia. Olga was moving toward the south-southwest at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 978 mb.

Tropical Cyclone Olga strengthened to the equivalent of a hurricane/typhoon northwest of Australia on Saturday. The inner end of a rainband wrapped around the center of Olga’s circulation. A circular eye with a diameter of 16 miles (26 km) formed at the center of Tropical Cyclone Olga. Bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center of Olga generated upper level divergence that pumped mass away from the tropical cyclone. Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Tropical Cyclone Olga. Winds to tropical storm force extended out 75 miles (120 km) from the center of Olga’s circulation.

Tropical Cyclone Olga will move through an environment favorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 29°C. It will move under the western part of the axis an upper level ridge over northern Australia. The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear. Tropical Cyclone Olga will continue to intensify during the next 24 hours.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga slowly toward the southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will parallel to the coast of Western Australia. Olga is forecast to turn more toward the west-southwest on Monday. Tropical Cyclone Olga is forecast to have a minimal impact on Western Australia.

Tropical Cyclone Olga Forms Northwest of Australia

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Tropical Cyclone Olga formed northwest of Australia on Friday night. At 11:00 p.m. EDT on Friday the center of Tropical Cyclone Olga was located at latitude 12.95°S and longitude 120.1°E which put it about 520 miles (840 km) north of the Port Hedland, Australia. Olga was moving toward the south at 4 m.p.h. (6 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 998 mb.

A low pressure system over the South Indian Ocean between Indonesia and Australia strengthened on Friday night and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Olga. The circulation around Tropical Cyclone Olga exhibited more organization on Friday night. A band of thunderstorms wrapped around the center of Olga’s circulation. Other bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center of Olga generated upper level divergence that pumped mass away from the tropical cyclone. Winds to tropical storm force extended out 60 miles (95 km) from the center of Tropical Cyclone Olga.

Tropical Cyclone Olga will move through an environment favorable for intensification during the next 24 hours. Olga will move over water where the Sea Surface Temperatures are near 29°C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Cyclone Olga will intensify during the next 24 hours. Olga could strengthen to the equivalent of a hurricane/typhoon.

Tropical Cyclone Olga will move around the northwestern part of a high pressure system over Australia. The high pressure system will steer Olga slowly toward the south during the next 24 hours. On its anticipated track, Tropical Cyclone Olga will move a little closer to Western Australia. Olga is forecast to turn more toward the west later in the weekend. Tropical Cyclone Olga is forecast to have a minimal impact on Western Australia.

Tropical Cyclone Neville Develops Northwest of Australia

Tropical Cyclone Neville developed over the South Indian Ocean northwest of Australia on Wednesday. At 5:00 a.m. EDT on Wednesday the center of Tropical Cyclone Neville was located at latitude 17.7°S and longitude 109.2°E which put it about 430 miles (695 km) northwest of Exmouth, Australia. Neville was moving toward the west at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 998 mb.

A low pressure system over the South Indian Ocean northwest of Australia strengthened on Wednesday morning and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Neville. The circulation around Tropical Cyclone Neville exhibited more organization on Wednesday. The inner end of a rainband wrapped most of the way around the center of Neville’s circulation. Bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center of Neville generated upper level divergence that pumped mass away from the tropical cyclone. Winds to tropical storm force extended out 65 miles (105 km) from the center of Tropical Cyclone Neville.

Tropical Cyclone Neville will move through an environment favorable for intensification during the next 24 hours. Neville will move over water where the Sea Surface Temperatures are near 29°C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Cyclone Neville will intensify during the next 24 hours. Neville could intensify rapidly at times and it is likely to strengthen to the equivalent of a hurricane/typhoon.

Tropical Cyclone Neville will move around the northern side of a high pressure system over the South Indian Ocean. The high pressure system will steer Neville toward the west during the next 24 hours. On its anticipated track, Tropical Cyclone Neville will move farther away from Australia. Neville could pass south of the Cocos Islands in three days.

Tropical Cyclone Lincoln Drops Rain on Western Australia

Tropical Cyclone Lincoln dropped rain on parts of Western Australia on Saturday. At 4:00 a.m. EST on Saturday the center of Tropical Cyclone Lincoln was located at latitude 22.8°S and longitude 113.3°E which put it about 65 miles (105 km) west of Learmonth, Australia. Lincoln was moving toward the south at 14 m.p.h. (22km/h). The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were wind gusts to 45 m.p.h. (75 km/h). The minimum surface pressure was 1001 mb.

Tropical Cyclone Lincoln weakened as it approached the coast of Western Australia on Saturday. An upper level trough over the South Indian Ocean west of Australia produced strong northwesterly winds that blew across the top of Lincoln’s circulation. Those winds caused strong vertical wind shear. The strong wind shear caused the distribution of thunderstorms in Tropical Cyclone Lincoln to be asymmetrical. Thunderstorms were occurring in bands in the southern half of Lincoln’s circulation. Bands in the northern half of Tropical Cyclone Lincoln consisted primarily of showers and lower clouds.

Tropical Cyclone Lincoln will move around the western side of a high pressure system over Australia. The high pressure system will steer Lincoln toward the south-southeast during the next 24 hours. On its anticipated track, Tropical Cyclone Lincoln will move farther inland near the coast of Western Australia.

Tropical Cyclone Lincoln will weaken while it moves inland over Western Australia. Lincoln will drop heavy rain over parts of Western Australia as it move farther inland. Heavy rain could cause floods in some locations. Flood Watches are in effect for the Pilbara Coast and the Gascoyne Coast river catchments. A Flood Watch is also in effect for the Central West District river catchments.

Tropical Cyclone Lincoln Moves Toward Western Australia

Tropical Cyclone Lincoln moved toward the coast of Western Australia on Friday. At 4:00 p.m. EST on Friday the center of Tropical Cyclone Lincoln was located at latitude 20.0°S and longitude 113.3°E which put it about 200 miles (320 km) north of Exmouth, Australia. Lincoln was moving toward the south-southwest at 5 m.p.h. (8 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 999 mb.

A Warning was in effect for the coast of Western Australia from Giralia to Cape Cuvier. The Warning included Exmouth, Ningaloo, and Coral Bay.

Tropical Cyclone Lincoln maintained its intensity on Friday, but the distribution of thunderstorms was asymmetrical. Thunderstorms were occurring mainly in bands in the western half of Lincoln’s circulation. Bands in the eastern half of Tropical Cyclone Lincoln consisted primarily of showers and lower clouds. Storms near the center of Lincoln’s circulation generated upper level divergence that pumped mass away to the south of the tropical cyclone. Winds to tropical storm force extended out 50 miles (80 km) from the center of Tropical Cyclone Lincoln.

Tropical Cyclone Lincoln will move through an environment marginally favorable for intensification during the next 24 hours. Lincoln will move over water where the Sea Surface Temperatures are near 28°C. However, an upper level trough over the South Indian Ocean west of Australia will produce northwesterly winds that will blow toward the top of Lincoln’s circulation. Those winds will cause moderate vertical wind shear. The wind shear will inhibit intensification, but Tropical Cyclone Lincoln could maintain its intensity during the next 24 hours.

The upper level trough west of Australia will steer Tropical Cyclone Lincoln toward the south during the next 24 hours. On its anticipated track, Tropical Cyclone Lincoln will approach the coast of Western Australia between Exmouth and Cape Cuvier in 24 hours. Lincoln will bring gusty winds and locally heavy rain to Western Australia. Heavy rain could cause flash floods in some locations.

Tropical Cyclone Eleanor Weakens South of Mauritius

Tropical Cyclone Eleanor weakened south of Mauritius on Friday. At 10:00 a.m. EST on Friday the center of Tropical Cyclone Eleanor was located at latitude 23.9°S and longitude 58.4°E which put it about 265 miles (430 km) south-southeast of Port Louis, Mauritius. Eleanor was moving toward the south at 5 m.p.h. (8 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 995 mb.

An upper level trough southeast of Madagascar produced strong northwesterly winds that blew across the top of Tropical Cyclone Eleanor. Those winds caused strong vertical wind shear. The strong upper level winds also blew the upper part pf Eleanor’s circulation to the southeast of the circulation in the lower levels of the atmosphere. Bands revolving around the center of Tropical Cyclone Eleanor consisted primarily of showers and lower clouds. A few thunderstorms were still occurring in bands in the southeastern periphery of Eleanor’s circulation. Winds to tropical storm force extended out 140 miles (225 km) from the center of Tropical Cyclone Eleanor.

Tropical Cyclone Eleanor will move through an environment unfavorable for intensification during the next 36 hours. Eleanor will move over water where the Sea Surface Temperatures are near 27°C. However, the upper level trough south of Madagascar will continue to cause strong vertical wind shear. The strong wind shear will cause Tropical Cyclone Eleanor to continue to weaken during the next 36 hours.

Since the circulation around Tropical Cyclone Eleanor exists in the lower levels of the atmosphere, it will be steered by winds in those levels. Eleanor will move around the northern side of a high pressure system over the South Indian Ocean. The high pressure system will steer Eleanor toward the west. On its anticipated track, Tropical Cyclone Eleanor will move south of Mauritius and La Reunion during the next 36 hours.

Elsewhere over the South Indian Ocean, Tropical Cyclone Lincoln continued to spin near the coast of Western Australia. At 10:00 a.m. EST on Friday the center of Tropical Cyclone Lincoln was located at latitude 19.3°S and longitude 113.5°E which put it about 245 miles (395 km) north of Exmouth, Australia. Lincoln was moving toward the southwest at 5 m.p.h. (8 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 999 mb. A Warning was in effect for the portion of the coast from Onslow to Wooramel Roadhouse, Australia. The Warning included Exmouth and Carnarvon.