Category Archives: Australian Region

Tropical Cyclone Fina Prompts Warning for North Coast of Australia

The risk posed by Tropical Cyclone Fina prompted the Australia Bureau of Meteorology to issue warnings and watches for portions of the northern coast of Australia on Tuesday night.  At 4:00 a.m. EST on Wednesday the center of Tropical Cyclone Fina was located at latitude 9.7°S and longitude 132.8°E which put the center about 225 miles (365 km) north-northeast of Darwin, Australia and about 105 miles (165 km) north of Minjilang, Australia.  Fina was moving toward the east at 5 m.p.h. (8 km/h).  The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h).  The minimum surface pressure was 987 mb.

A Warning is in effect for the portion of the coast from Cape Don to Warruwi, Australia including the Cobourg Peninsula and Minjilang.

A Watch is in effect for the Tiwi Islands.  A Watch is also in effect for the portion of the coast from Maningrida to Milingimbi, Australia.

Tropical Cyclone Fina strengthened as it moved over the Arafura Sea north of Australia on Tuesday night.  Thunderstorms continued to develop near the center of Fina’s circulation.  Thunderstorms were also occurring in bands revolving around the center of Tropical Cyclone Fina.  Storms near the center of Fina’s circulation generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Fina was small.  Winds to tropical storm force extended out 50 miles (80 km) from the center of Fina’s circulation.

Tropical Cyclone Fina will move through an environment favorable for intensification during the next 24 hours.  Fina will move over water where the Sea Surface Temperatures are near 30°C.  It will move though a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Cyclone Fina will intensify during the next 24 hours.  Fina could strengthen to the equivalent of a hurricane/typhoon.

Tropical Cyclone Fina will move around the southern side of a narrow high pressure system that is near the Equator.  The high pressure system will steer Fina slowly toward the east during the next 24 hours.  On its anticipated track, Tropical Cyclone Fina will move parallel to the northern coast of Australia.  Fina will start to move south toward the coast of the Northern Territory of Australia on Thursday.

Tropical Cyclone Fina is likely to reach the northern coast of the Northern Territory of Australia within 36 hours.  Fina will bring strong winds and heavy rain to the coast.  Heavy rain is likely to cause floods in some locations.  Tropical Cyclone Fina could also cause a storm surge of up to 7 feet (2 meters) along parts of the coast of the Northern Territory.

A Flood Watch is in effect for areas across the northwest Top End of Australia.

 

Tropical Cyclone Fina Forms North of Darwin

Tropical Cyclone Fina formed over the western Arafura Sea north of Darwin, Australia on Tuesday.  At 1:00 p.m. EST on Tuesday the center of Tropical Cyclone Fina was located at latitude 9.7°S and longitude 131.6°E which put the center about 195 miles (315 km) north-northeast of Darwin, Australia and about 120 miles (195 km) north-northwest of Minjilang, Australia.  Fina was moving toward the east-northeast 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 995 mb.

A low pressure system over the western Arafura Sea strengthened on Tuesday and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Fina.

Tropical Cyclone Fina was strengthening on Tuesday.  More thunderstorms were forming near the center of Fina’s circulation.  Thunderstorms were also developing in bands revolving around the center of Tropical Cyclone Fina.  Storms near the center of Fina’s circulation generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Fina was small.  Winds to tropical storm force extended out 30 miles (50 km) from the center of Fina’s circulation.

Tropical Cyclone Fina will move through an environment favorable for intensification during the next 24 hours.  Fina will move over water where the Sea Surface Temperatures are near 30°C.  It will move though a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Cyclone Fina will intensify during the next 24 hours.

Tropical Cyclone Fina will move around the southern side of a narrow high pressure system that is near the Equator.  The high pressure system will steer Fina slowly toward the east-northeast during the next 24 hours.  On its anticipated track, Tropical Cyclone Fina will move parallel to the northern coast of Australia.  Fina is forecast to move south toward Australia later this week.

Tropical Cyclone Fina could affect the northern coast of the Northern Territory of Australia later this week.  Fina is likely to bring strong winds and heavy rain to the coast.  Heavy rain could cause floods in some locations.

Tropical Low Spins Over Gulf of Carpentaria

A Tropical Low was spinning over the Gulf of Carpentaria on Sunday night.  At 11:00 p.m. EDT on Sunday the center of the Tropical Low was located at latitude 12.1°S and longitude 138.1°E which put the center about 100 miles (160 km) east of Nhulunbuy, Australia.   The Tropical Low was moving toward the west-northwest at 12 m.p.h. (19 km/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.

A low pressure system was spinning over the Gulf of Carpentaria on Sunday.  The Australian Bureau of Meteorology was designating the low pressure system as a Tropical Low.  The U.S. Joint Typhoon Warning Center was designating the low pressure system as Tropical Cyclone 31P.

The Tropical Low exhibited better organization on Sunday night.  More thunderstorms formed near the center of circulation.  More thunderstorms also developed in bands revolving around the center of the Tropical Low.  Storms near the center of circulation generated upper level divergence that pumped mass away from the Tropical Low.

The Tropical Low will move through an environment somewhat favorable for intensification during the next 24 hours.  The Tropical Low will move over water where where the Sea Surface Temperatures are near 30°C.  It will move under the northern part of an upper level ridge over northern Australia.  The upper level ridge will produce northeasterly winds that will blow toward the tip of the Tropical Low.  Those winds will cause moderate vertical wind shear.  The vertical wind shear will inhibit intensification, but the shear may not be strong enough to prevent some intensification.  The Tropical Low could intensify during the next 24 hours.

The Tropical Low will move around the northern side of a high pressure system over Australia.  The high pressure system will steer the Tropical Low toward the west-northwest during the next 24 hours.  On its anticipated track, The Tropical Low will pass near Nhulunbuy and Cape Wessel.  The Tropical Low will move over the Arafura Sea on Tuesday.

The Tropical Low will bring gusty winds and locally heavy rain to the far northeastern part of the Northern Territory of Australia.  Heavy rain could cause floods in some locations.

Tropical Cyclone Errol Makes Landfall in Western Australia

Tropical Cyclone Errol made landfall on the coast of Western Australia on Friday.  At 5:00 a.m. EDT on Friday the center of Tropical Cyclone Errol was located at latitude 16.1°S and longitude 124.3°E which put the center about 20 miles (35 km) south-southwest of Kuri Bay, Australia.  Errol was moving toward the east at 6 m.p.h. (10 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. (105 km/h).  The minimum surface pressure was 998 mb.

Tropical Cyclone Errol made landfall on the coast of Western Australia south-southwest of Kuri Bay on Friday.  Errol was weakening at the time of landfall.  Tropical Cyclone Errol was the equivalent of a tropical storm when it made landfall.  The circulation around Errol was small.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Tropical Cyclone Errol.

An upper level trough near the coast of Western Australia will steer Tropical Cyclone Errol toward the east-southeast during the next 24 hours.  On its anticipated track, Tropical Cyclone Errol will move inland over Western Australia.  The center of Errol’s circulation will move southeast of Kuri Bay.

Tropical Cyclone Errol will bring gusty winds and locally heavy rain to parts of Western Australia south of Kuri Bay.  Heavy rain could cause flash floods in some locations.

Tropical Cyclone Errol Weakens Rapidly

Tropical Cyclone Errol weakened rapidly as it approached the coast of Western Australia on Thursday.  At 5:00 p.m. EDT on Thursday the center of Tropical Cyclone Errol was located at latitude 16.2°S and longitude 122.1°E which put the center about 135 miles (220 km) north-northwest of Broome, Australia.  Errol was moving toward the east-southeast at 14 m.p.h. (22 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).   The minimum surface pressure was 980 mb.

A Warning is in effect for the coast of Western Australia from Kuri Bay to Broome.  The Warning includes Derby.

Tropical Cyclone Errol weakened rapidly as it approached the coast of Western Australia on Thursday.  An upper level trough near the coast of Western Australia was producing strong northwesterly winds that were blowing the top of Errol’s circulation.  Those winds were causing strong vertical wind shear.  The strong vertical wind shear was causing Tropical Cyclone Errol to weaken rapidly.

The strong vertical wind shear was also affecting the structure of Tropical Cyclone Errol.  Thunderstorms were still occurring in bands in the eastern side of Errol’s circulation.  Bands in the western side of Tropical Cyclone Errol consisted primarily of showers and lower clouds.

The circulation around Tropical Cyclone Errol was small.  Winds to hurricane/typhoon force extended out 15 miles (25 km) in the eastern side of Errol’s circulation.  Winds to tropical storm force extended out 90 miles (145 km) from the center of Tropical Cyclone Errol.

Tropical Cyclone Errol will move through an environment unfavorable for intensification during the next 12 hours. Errol will move over water where where the Sea Surface Temperatures are near 30°C.  However, the upper level trough near the coast of western Australia will continue to produce strong northwesterly winds that will blow toward the of Errol’s circulation.  Those winds will continue to cause strong vertical wind shear.  The strong vertical wind shear will cause Tropical Cyclone Errol to continue to weaken rapidly.

The upper level trough near the coast of Western Australia will steer Tropical Cyclone Errol toward the east-southeast during the next 24 hours.  On its anticipated track, the center of Tropical Cyclone Errol will make landfall near Cape Leveque in about 12 hours.  The center of Errol’s circulation will pass north of Derby.

Tropical Cyclone Errol will bring strong winds and locally heavy rain to the part of Western Australia near Cape Leveque and northeast of Derby.  Heavy rain could cause flash floods in some locations.

Tropical Cyclone Errol Rapidly Intensifies to Equivalent of Cat. 5 Hurricane

Tropical Cyclone Errol rapidly intensified to the equivalent of a Category 5 hurricane over the South Indian Ocean northwest of Australia on Wednesday.  At 11:00 a.m. EDT on Wednesday the center of Tropical Cyclone Errol was located at latitude 14.2°S and longitude 118.9°E which put the center about 325 miles (520 km) northwest of Broome, Australia.  Errol was moving toward the southwest at 5 m.p.h. (8 km/h).  The maximum sustained wind speed was 160 m.p.h. (260 km/h) and there were wind gusts to 195 m.p.h. (315 km/h).   The minimum surface pressure was 919 mb.

A Watch is in effect for the coast of Western Australia from Kuri Bay to Broome.  The Watch includes Derby.

Tropical Cyclone Errol rapidly intensified to the equivalent of a Category 5 hurricane on the Saffir-Simpson Scale on Wednesday.  A very small circular eye with a diameter of 10 miles (16 km) was at the center of Errol’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 Errol.  Storms near the core of Errol generated upper level divergence that pumped large quantities of mass away from the tropical cyclone.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

The size of the circulation around Tropical Cyclone Errol increased while Errol rapidly intensified.  Winds to hurricane/typhoon force extended out 40 miles (65 km) from the center of Errol’s circulation.  Winds to tropical storm force extended out 90 miles (145 km) from the center of Tropical Cyclone Errol.

The Hurricane Intensity Index (HII) for Tropical Cyclone Errol is 35.0.  The Hurricane Size index (HSI) is 12.8 and the Hurricane Wind Intensity Size Index (HWISI) is 47.8.  Tropical Cyclone Errol is similar in size and intensity to Hurricane Michael when Michael hit Northwest Florida in 2018.

Tropical Cyclone Errol will move through an environment favorable for a powerful tropical cyclone during the next 24 hours.  Errol will move over water where where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge over Australia and the South Indian Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Tropical Cyclone Errol could continue to intensify during the next 24 hours unless an eyewall replacement cycle occurs.  If the inner end of a rainband wraps around the existing eye and eyewall, then concentric eyewalls could cause Errol to weaken.  An upper level trough over the South Indian Ocean will approach Tropical Cyclone Errol on Thursday.  The upper level trough will cause the vertical wind shear to increase.  More vertical wind shear will cause Errol to weaken.

Tropical Cyclone Errol will move around the northwestern part of a high pressure system over Australia.  The high pressure system will steer Errol toward the southwest during the next 24 hours.  On its anticipated track, Tropical Cyclone Errol will remain north of Western Australia during the next day or so.  The upper level trough over the South Indian Ocean will cause Errol to start to move back toward the southeast on Thursday.

Tropical Cyclone Errol Rapidly Intensifies to Equivalent of a Major Hurricane

Tropical Cyclone Errol rapidly intensified to the equivalent of a major hurricane over the South Indian Ocean northwest of Australia during Tuesday night.  At 5:00 a.m. EDT on Wednesday the center of Tropical Cyclone Errol was located at latitude 14.2°S and longitude 119.1°E which put the center about 325 miles (520 km) northwest of Broome, Australia. Errol was moving toward the west-southwest at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 140 m.p.h. (220 km/h) and there were wind gusts to 165 m.p.h. (265 km/h).  The minimum surface pressure was 940 mb.

A Watch is in effect for the coast of Western Australia from Kuri Bay to Broome.  The Watch includes Derby.

Tropical Cyclone Errol rapidly intensified to the equivalent of a  major hurricane during Tuesday night.  A very small circular eye with a diameter of 8 miles (13 km) was at the center of Errol’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 Errol.  Storms near the core of Errol generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Errol was small.  Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Errol’s circulation.  Winds to tropical storm force extended out 75 miles (120 km) from the center of Tropical Cyclone Errol.

The Hurricane Intensity Index (HII) for Tropical Cyclone Errol is 28.3.  The Hurricane Size index (HSI) is 7.2 and the Hurricane Wind Intensity Size Index (HWISI) is 35.5  Tropical Cyclone Errol is similar in size and intensity to Hurricane Charley when Charley hit Southwest Florida in 2004.

Tropical Cyclone Errol will move through an environment favorable for intensification during the next 24 hours.  Errol will move over water where where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge over Australia and the South Indian Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Tropical Cyclone Errol could continue to intensify during the next 24 hours unless an eyewall replacement cycle occurs.  If the inner end of a rainband wraps around the existing eye and eyewall, then concentric eyewalls could cause Errol to weaken.

Tropical Cyclone Errol will move around the northwestern part of a high pressure system over Australia.  The high pressure system will steer Errol toward the southwest during the next 24 hours.  On its anticipated track, Tropical Cyclone Errol will remain north of Western Australia during the next day or so.  Errol could start to move back toward the southeast on Thursday.

Tropical Cyclone Errol Rapidly Intensifies to Equivalent of Hurricane/Typhoon

Tropical Cyclone Errol rapidly intensified to the equivalent of a hurricane/typhoon over the South Indian Ocean northwest of Australia on Tuesday.  At 11:00 p.m. EDT on Tuesday the center of Tropical Cyclone Errol was located at latitude 14.2°S and longitude 119.5°E which put the center about 310 miles (500 km) north-northwest of Broome, Australia.  Errol was moving toward the west-southwest at 7 m.p.h. (11 km/h).  The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 115 m.p.h. (185 km/h).  The minimum surface pressure was 976 mb.

Tropical Cyclone Errol rapidly intensified to the equivalent of a hurricane/typhoon on Tuesday.  The inner end of a rainband wrapped around the center of Errol’s circulation.  A very small circular eye formed at the center of Tropical Cyclone Errol.  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 Errol’s circulation.  Storms near the core of Errol generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Errol was small.  Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Errol’s circulation.  Winds to tropical storm force extended out 85 miles (135 km) from the center of Tropical Cyclone Errol.

Tropical Cyclone Errol will move through an environment very favorable for intensification during the next 24 hours.  Errol will move over water where where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge over Australia and the South Indian Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Tropical Cyclone Errol will intensify during the next 24 hours.  Errol is likely to rapidly intensify to the equivalent of a  major hurricane..

Tropical Cyclone Errol will move around the northwestern part of a high pressure system over Australia.  The high pressure system will steer Errol toward the west-southwest during the next 24 hours. On its anticipated track, Tropical Cyclone Errol will remain north of Western Australia during the next day or so. Errol could move back toward the southeast later this week.

Tropical Cyclone Errol Intensifies Northwest of Australia

Tropical Cyclone Errol intensified over the South Indian Ocean northwest of Australia on Tuesday.  At 11:00 a.m. EDT on Tuesday the center of Tropical Cyclone Errol was located at latitude 13.9°S and longitude 120.5°E which put the center about 290 miles (470 km) north-northwest of Broome, Australia.  Errol was moving toward the west at 8 m.p.h. (13 km/h).  The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h).  The minimum surface pressure was 992 mb.

A former Tropical Low over the South Indian Ocean northwest of Australia started to intensify on Tuesday and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Errol.

The circulation around Tropical Cyclone Errol exhibited much more organization on Tuesday.  The inner end of a rainband wrapped around the southern and western sides of the center of Errol’s circulation.  The strongest winds were occurring in the inner part of that rainband.  Other bands of showers and thunderstorms were revolving around the center of Tropical Cyclone Errol.  Storms near the center of Errol’s circulation generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Errol was small.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Errol’s circulation.

Tropical Cyclone Errol will move through an environment somewhat favorable for intensification during the next 24 hours.  Errol will move over water where where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge over Australia and the South Indian Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Tropical Cyclone Errol will intensify during the next 24 hours.  Errol could intensify rapidly at times.  Tropical Cyclone Errol will strengthen to the equivalent of a hurricane/typhoon.  Errol could intensify to the equivalent of a major hurricane on Wednesday.

Tropical Cyclone Errol will move around the northwestern part of a high pressure system over Australia.  The high pressure system will steer the Tropical Low toward the west during the next 24 hours.  On its anticipated track, Tropical Cyclone Errol will remain north of Western Australia during the next day or so.  Errol could move back toward the southeast later this week.

Tropical Low Causes Warning for Western Australia

The risk posed by a Tropical Low caused the Australia Bureau of Meteorology to issue a Warning for a portion of the coast of Western Australia on Saturday.  At 5:00 p.m. EDT on Saturday the center of the Tropical Low was located at latitude 12.2°S and longitude 125.8°E which put the center about 260 miles (420 km) north-northeast of Kuri Bay, Australia.  The Tropical Low was moving toward the 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.

A Warning is in effect for the portion of the coast of Western Australia from Kalumburu to Kuri Bay.

A Watch is in effect for the portion of the coast of Western Australia from Kuri Bay to Cockatoo Island.

The U.S. Joint Typhoon Warning Center designated the Tropical Low as Tropical Cyclone 29S.

The Tropical Low was strengthening gradually as it moved near the northern coast of Western Australia.  Vertical wind shear was still causing the distribution of thunderstorms to be asymmetrical.  The Tropical Low was under the northern part of an upper level ridge that extended from Australia to the South Indian Ocean.  The upper level ridge was producing northeasterly winds that were causing the vertical wind shear.  Most of the thunderstorms were occurring in bands in the southern half of the Tropical Low.  Bands in the northern side of the Tropical Low consisted primarily of showers and lower clouds.  Storms near the center of circulation generated upper level divergence that pumped mass away to the south and west of the Tropical Low.  The removal of mass in the upper levels was nearly equal to the inflow of mass in the lower levels of the atmosphere.  The balance of inflow and outflow was causing the surface pressure to remain constant.

The asymmetric distribution of thunderstorms was also causing the pattern of wind speeds to be asymmetrical.  Winds to tropical storm force extended out 115 miles (185 km) in the southern side of the Tropical Low.  The winds in the northern part of the Tropical Low were blowing at less than tropical storm force.

The Tropical Low will move through an environment somewhat favorable for intensification during the next 24 hours.  The Tropical Low will move over water where where the Sea Surface Temperatures are near 30°C.  The northern part of an upper level ridge over Australia and the South Indian Ocean will continue to produce northeasterly winds that will blow toward the top of the Tropical Low.  Those winds will cause some vertical wind shear.  The wind shear will inhibit intensification, but the Tropical Low is likely to intensify gradually during the next 24 hours.

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

The Tropical Low could bring gusty winds and locally heavy rain to the coast of Western Australia between Kalumburu and Kuri Bay.  Heavy rain could cause flash floods in some locations.