Tag Archives: Gulf of Carpentaria

Tropical Cyclone Owen Makes Landfall in Queensland

After making landfall on the southwest coast of the Gulf of Carpentaria, Tropical Cyclone Owen reversed course and it is now making landfall on the coast of Queensland between Kowanyama and the Gilbert River Mouth.  At 1:00 p.m. EST on Friday the center of Tropical Cyclone Owen was located at latitude 16.2°S and longitude 141.4°E which put it about 55 miles (85 km) south-southwest of Kowanyama, Australia.  Owen was moving toward the southeast at 16 m.p.h. (26 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 975 mb.

A Tropical Storm Warning was in effect for the portion of the coast from Karumba to Cape Keerweer, Queensland and adjacent coastal areas including Kowanyama, Pormpuraaw, Croydon and Palmerville.

Tropical Cyclone Owen moved quickly across the southern Gulf of Carpentaria during the past 24 hours.  The circulation around Owen reorganized after the center of circulation moved away from the southwest coast of the Gulf of Carpentaria.  An eye reformed at the center of circulation and more thunderstorms developed.  Tropical Cyclone Owen strengthened back into the equivalent of a hurricane/typhoon.  The circulation around Owen is small.  Winds to hurricane/typhoon force only extend out about 20 miles (35 km) from the center of circulation.  Winds to tropical storm force extend out about 100 miles (160 km) from the center.

Tropical Cyclone Owen will be capable of causing minor wind damage over a localized area near the center of circulation.  Locally heavy rain will fall along the track of Owen as it moves inland across Queensland.  On its anticipated track the center of Tropical Cyclone Owen is forecast to pass south of Cairns and it could be near Townsville in about 36 hours.  The rain will likely cause flooding in some locations.  A Flood Warning has been issued for the Jordan River.  Flood Watches have been issued for the Gulf of Carpentaria, south Cape York Peninsula and coastal catchments from Cape Tribulation to Rainbow Beach in Queensland.

Tropical Cyclone Owen Near Coast of Australia

The center of Tropical Cyclone Owen was near the coast of Australia on Wednesday.  At 4:00 p.m. EST on Wednesday the center of Tropical Cyclone Owen was located at latitude 15.2°S and longitude 136.1°E which put it about 55 miles (90 km) northwest of Port McArthur, Australia.  Owen was moving toward the southwest at 5 m.p.h. (8 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 Owen was the equivalent of a hurricane/typhoon.

The center of Tropical Cyclone Owen was near the portion of the coast between Port Roper and Port McArthur in the Northern Territory of Australia.  Owen was producing winds to near hurricane/typhoon force.  It was dropping locally heavy rain over the southeastern coastal portions of the Northern Territory.

A Tropical Cyclone Warning was in effect for the portion of the coast between Alyangula, Northern Territory and Burketown, Queensland  including Groote Eylandt, Mornington Island and Borroloola.  A Tropical Cyclone Watch was in effect for the portion of the coast from Burketown to Aurukun, Northern Territory and adjacent inland areas including Pormpuraaw, Kowanyama and Karumba.  Flood Watches were in effect for the Gulf of Carpentaria, south Cape York Peninsula and North Tropical Coast catchments in Queensland.

Tropical Cyclone Owen strengthened and exhibited greater organization on Wednesday.  A small circular eye developed at the center of circulation.  A ring of strong thunderstorms surrounded the eye and the strongest winds were occurring in that ring of storms.  Several bands of showers and thunderstorms were revolving around the core of Tropical Cyclone Owen.  The strongest rainbands were over the Gulf of Carpentaria.  Storms around the core of Owen were generating upper level divergence which was pumping mass away to the southeast of the tropical cyclone.

The circulation around Tropical Cyclone Owen was relatively small.  Winds to hurricane/typhoon force extended out only about 20 miles (30 km) from the center of circulation.  Winds to tropical storm force extended out about 80 miles (130 km) from the center.

Tropical Cyclone Owen will move through an environment favorable for intensification for another 24 to 36 hours.  Owen will move over water where the Sea Surface Temperature is near 30°C.  An upper level trough over Western Australia and an upper level ridge northeast of Australia will combine to produce northwesterly winds which blow toward the top of the circulation.  Those winds will cause some vertical wind shear, but the shear will not be strong enough to prevent further intensification.  The center of Tropical Cyclone Own is close to the coast and part of the circulation is over land.  Owen could weaken during the next few hours, while the center is near land.  It should strengthen when the center moves back over the Gulf of Carpentaria.

Tropical Cyclone Owen is an area where the steering currents are weak and it is moving slowly toward the southwest.  The trough over Western Australia will start to steer Owen toward the east-southeast during the next 12 hours.  On its anticipated track the center of Tropical Cyclone Owen could pass just north of Port McArthur in about 12 hours.  Owen could pass north of Mornington Island in about 18 hours.  Tropical Cyclone Owen could approach the southeast of coast of the Gulf of Carpentaria in about 36 hours.  Owen is likely to be the equivalent of a hurricane/typhoon at that time.

Tropical Cyclone Owen will bring gusty winds and locally heavy rain to the southern portions of the Gulf of Carpentaria.  Owen will be capable of causing minor wind damage while it lingers near the southeast coast of the Northern Territory.  It will also drop locally heavy rain in coastal areas and flooding could occur.  Tropical Cyclone Owen will be stronger when it brings wind and rain to parts of Queensland.

Tropical Cyclone Owen Redevelops Over Gulf of Carpentaria

After meandering westward over the Coral Sea last week and crossing northern Queensland, Tropical Cyclone Owen redeveloped over the Gulf of Carpentaria on Tuesday.  At 10:00 a.m. EST on Tuesday the center of Tropical Cyclone Owen was located at latitude 14.9°S and longitude 138.4°E which put it about 135 miles (215 km) north-northwest of Mornington Island, Australia.  Owen was moving toward the west-northwest 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 993 mb.

The circulation around Tropical Cyclone Owen exhibited increased organization after it moved over the Gulf of Carpentaria and the Australian Bureau of Meteorology reclassified the system as a tropical cyclone on Tuesday.  A band of showers and thunderstorms was wrapping around the southern and western sides of the center of circulation and the strongest winds were occurring in that band of storms.  Other bands of showers and thunderstorms were strengthening over the Gulf of Carpentaria.  Storms near the center of circulation started to generate upper level divergence which was pumping mass away from the tropical cyclone.

A Tropical Cyclone Warning is in effect for the portion of the coast from Cape Shield, Northern Territory to Burketown, Queensland including Groote Eylandt and Mornington Island.

Tropical Cyclone Owen will move through an environment favorable for intensification during the next several days.  Owen will move over water where the Sea Surface Temperature is near 30°C.  It will move in an area between an upper level ridge north of Australia and a larger upper level ridge over the South Pacific Ocean where the upper level winds are weaker.  There will be some vertical wind shear, but the wind shear will not be strong enough to prevent intensification.  Tropical Cyclone Owen will intensify during the next two days and it could strengthen into the equivalent of a hurricane/typhoon.

The ridge north of Australia will steer Tropical Cyclone Owen toward the west-northwest during the next 24 hours.  On its anticipated track Tropical Cyclone Owen could be near Groote Eylandt in about 24 hours.  An upper level trough over Western Australia will move eastward and the trough will cause the winds in the steering levels to weaken in a day or so.  Owen could drift slowly southward for 12 to 24 hours when that happens.  Eventually, westerly winds blowing around the northern end of the trough are forecast to turn Tropical Cyclone Owen back toward the east.

Tropical Cyclone Owen could bring gusty winds and drop locally heavy rain over Groote Eylandt when it passes nearby.  If Owen drifts southward as expected, it could also bring gusty winds and heavy rain to the western coast of the Gulf of Carpentaria near Port McArthur.

Former Tropical Cyclone Owen Drops Rain on Northern Queensland

After meandering westward across the Coral Sea during the past week a low pressure system formerly designated as Tropical Cyclone Owen dropped rain on northern Queensland on Sunday.  At 7:00 p.m. EST on Sunday the center of former Tropical Cyclone Owen was located at latitude 15.7°S and longitude 144.5°E which put it about 75 miles (120 km) west of Cairns, Australia.  Owen was moving toward the west-northwest at 7 m.p.h.  The maximum sustained wind speed was 25 m.p.h. (40 km/h) and there were wind gusts to 35 m.p.h. (55 km/h).  The minimum surface pressure was 1006 mb.

Although it is no longer formally designated as a tropical cyclone, the low pressure center that was Tropical Cyclone Owen maintains a distinct low level center of circulation.  Bands of showers and thunderstorms are revolving around the center.  Some of those bands are moving inland over northern Queensland and they are dropping locally heavy rainfall.  Flooding could develop in areas that receive persistent heavy rain.

Flood Watches are in effect for the Mulgrave River, Russell River, Johnstone River, Murray River, Tully River, and Herbert River.

Former Tropical Storm Owen is forecast to move toward the west-northwest across the Cape York Peninsula.  It could emerge over the Gulf of Carpentaria early in the week.  There is a possibility that the low pressure system could strengthen when it moves back over water.

 

Tropical Cyclone Nora Makes Landfall in Queensland

Tropical Cyclone Nora made landfall on the coast of Queensland near Pormpuraaw on Saturday.  At 5:00 p.m. EDT on Saturday the center of Tropical Cyclone Nora was located at latitude 15.8°S and longitude 141.8°E which put it about 30 miles (50 km) south of Kowanyama, Australia.  Nora was moving toward the south-southeast at 15 m.p.h. (24 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 979 mb.

Tropical Cyclone Nora moved across the northern Gulf of Carpentaria and made landfall near Pormpuraaw earlier on Saturday.  A weather station at Kowanyama, which is south of the original landfall recorded a sustained wind speed of 44 m.p.h. (70 km/h) and a wind gust of 62 m.p.h. (100 km/h).  The station also recorded five inches (128 mm) of rain.

Tropical Cyclone Nora is forecast to move southward near the coast of the Gulf of Carpentaria for another 12 to 18 hours.  Nora is then expected to move westward across the southern end of the Gulf of Carpentaria.  The Australian Bureau of Meteorology was maintaining a warning for the portion of the coast from Pormpuraaw to Karumba.  A Watch was in effect for the portion of the coast from Karumba to the border between Queensland and the Northern Territory.  In addition to bringing gusty winds to the coast of Queensland, Tropical Cyclone Nora will drop locally heavy rain.  The heavy rain could cause flash flooding in some places.

Tropical Cyclone Nora Strengthens Over Gulf of Carpentaria

Tropical Cyclone Nora strengthened over the Gulf of Carpentaria on Friday.  At 11:00 p.m EDT on Friday the center of Tropical Cyclone Nora was located at latitude 12.6°S and longitude 140.0°E which put it about 125 miles (205 km) west of Weipa, Australia.  Nora was moving toward the southeast at 9 m.p.h. (14 km/h).  The maximum sustained wind speed was 110 m.p.h. (175 km/h) and there were wind gusts to 130 m.p.h. (210 km/h).  The minimum surface pressure was 956 mb.  The Australian Bureau of Meteorology had issued a Warning for the portion of the coast from Karumba to Mapoon including Weipa and Mornington Island.  A Watch was in effect for the portion of the coast from Weipa to the border between the Northern Territory and Queensland.

Tropical Cyclone Nora strengthened on Friday as it entered the northern portion of the Gulf of Carpentaria.  An eye appeared intermittently at the center of circulation.  A band of stronger thunderstorms wrapped intermittently around the formative eye and the strongest winds were blowing in the band of thunderstorms.  Bands of showers and thunderstorms were revolving around the center of circulation.  Storms near the core of the circulation were generating upper level divergence which was pumping mass away from the tropical cyclone.

Tropical Cyclone Nora will be moving through an environment favorable for intensification.  Nora will move over water where the Sea Surface Temperature is near 30°C.  It will move under an area where the upper level winds are weak and there is little vertical wind shear.  Tropical Cyclone Nora could strengthen into the equivalent of a major hurricane during the next 24 to 36 hours.

Tropical Cyclone Nora is moving near the western end of a mid-level ridge which is steering Nora toward the south.  A general motion toward the south is expected to continue for another day or two.  On its anticipated track Nora could approach the coast of Queensland between Kowanyama and the mouth of the Gilbert River in 24 to 36 hours.  Nora could bring gusty winds and locally heavy rain to portions of northwestern Queensland.

Elsewhere, Tropical Cyclone Marcus was weakening off the coast of Western Australia.  At 11:00 p.m. EDT on Friday the center of Tropical Cyclone Marcus was located at latitude 25.9°S and longitude 107.5°E, which put it about 770 miles (1045 km) west of Carnarvon, Australia.  Marcus was moving toward the south-southeast at 20 m.p.h. (32 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 984 mb.

Tropical Cyclone Nora Develops Rapidly North of Australia

Tropical Cyclone Nora developed rapidly north of Australia over the Arafura Sea on Thursday.  At 11:00 p.m. EDT on Thursday the center of Tropical Cyclone Nora was located at latitude 10.0°S and longitude 136.8°E which put it about 160 miles (260 km) north of Nhulunbuy, Australia.  Nora was moving toward the east at 3 m.p.h. (5 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 986 mb.

A center of circulation organized quickly on Thursday in an area of thunderstorms over the Arafura Sea and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Nora.  A primary rainband wrapped around the western and northern side of the center of circulation.  An eye appeared to be forming at the center of Tropical Cyclone Nora.  Bands of showers and thunderstorms were revolving around the core of the circulation.  Storms around the core were generating well developed upper level divergence which was pumping mass away from the tropical cyclone.  The removal of mass was allowing the surface pressure to decrease rapidly and the wind speeds were increasing in response.

The Australian Bureau of Meteorology issued Warnings for the portions of the coast from Elcho Island to Cape Shield including Cape Wessel and from Pormpuraaw to Thursday Island.  A Watch was in effect for the portion of the coast from Pormpuraaw to the border between the Northern Territory and Queensland including Mornington Island.

Tropical Cyclone Nora will move through an environment very favorable for intensification during the next 48 hours.  Nora will move over water where the Sea Surface Temperature is near 30°C.  It will move through an area where the upper level winds are weak and there is little vertical wind shear.  Nora is likely to intensify rapidly and it is likely to become the equivalent of a hurricane/typhoon within 24 hours.  Tropical Cyclone Nora could become the equivalent of a major hurricane within 24 to 48 hours.

Tropical Cyclone Nora was moving through an area where steering winds are weak and it was moving slowly toward the east.  A subtropical ridge east of Australia is expected to strengthen.  The ridge is forecast to steer Nora more toward the south in 12 to 24 hours.  On its anticipated track Tropical Cyclone Nora is expected to move over the Gulf of Carpentaria toward the coast of Queensland.  Nora could strengthen into a dangerous tropical cyclone.

Elsewhere, Tropical Cyclone Marcus continued to churn west of Australia.  At 11:00 p.m. EDT on Thursday the center of Tropical Cyclone Marcus was located at latitude 20.6°S and longitude 106.0°E which put it about 555 miles (895 km) west-northwest of Learmonth, Australia.  Marcus was moving toward the south at 13 m.p.h. (21 km/h).  The maximum sustained wind speed was 120 m.p.h. (195 km/h) and there were wind gusts to 150 m.p.h. (240 km/h).  The minimum surface pressure was 951 mb.

Tropical Cyclone 16P Forms Over Gulf of Carpentaria

After a quiet period of several weeks in the tropics Tropical Cyclone 16P formed over the Gulf of Carpentaria on Tuesday.  At 11:00 p.m. EDT on Tuesday the center of Tropical Cyclone 16P was located at latitude 16.4°S and longitude 140.3°E which put it about 75 miles (120 km) east-northeast of Mornington Island and about 115 miles (185 km) southwest of Kowanyama, Australia.  Tropical Cyclone 16P was moving toward the east-southeast at 12 m.p.h. (18 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 996 mb.

An upper level ridge persisted over the Gulf of Carpentaria during the past few days.  The upper level ridge generated upper level divergence which enhanced rising motion and supported the development of thunderstorms.  Eventually, the upper level divergence pumped out enough mass to allow the surface pressure to decrease and the thunderstorms began to consolidate around a low level center.  The system developed enough organization on Tuesday to be classified as a tropical cyclone.

The organization of Tropical Cyclone 16P improved on Tuesday.  Spiral bands of thunderstorms wrapped around a low level center.  Strong thunderstorms near the center of circulation generated upper level divergence, especially to the east of the tropical cyclone.

The environment is favorable for intensification as long as the center of circulation remains over water.  The Sea Surface Temperatures are near 31°C in the southern Gulf of Carpentaria.  An upper level ridge to the east of the tropical cyclone is generating some vertical wind shear, but the ridge is also enhancing upper level divergence.  The primary inhibiting factor is the proximity of the center of circulation to land.  Tropical Cyclone 16P could intensify further during the next 12 hours before it makes landfall.

The upper level ridge is steering Tropical Cyclone 16P toward the southeast coast of the Gulf of Carpentaria.  On its anticipated track Tropical cyclone 16P is expected to make landfall in Queensland near the mouth of the Gilbert River in about 12 hours.  The potential track after landfall is much more uncertain.  Some guidance suggests that the tropical cyclone could move across the Cape York peninsula toward the Coral Sea.  Other guidance suggests that the tropical cyclone could turn back toward the northwest and move back out into the Gulf of Carpentaria.

Although Tropical Cyclone 16P is likely to cause minor wind damage, it could produce locally heavy rainfall and flooding when it moves over northeastern Queensland.

Tropical Low Forms Over Northern Australia

A distinct center of circulation consolidated within a broader area of low pressure near the northern coast of Australia.  The Australian Bureau of Meteorology designated the system as a Tropical Low.  At 10:00 p.m. EST on Saturday the center of the Tropical Low was located at latitude 14.7°N and longitude 132.7°E which put it about 35 miles (55 km) east-southeast of Katherine, Australia and about 135 miles (220 km) west of Ngukurr.  The Tropical Low was moving toward the east at 3 m.p.h. (5 km).  The maximum sustained wind speed was 30 m.p.h. (45 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1005 mb.

The atmospheric environment around the Tropical Low would be favorable for the development of a tropical cyclone.  The upper level winds are light and there is not much vertical wind shear.  An upper level anticyclone over the Tropical Low is providing a source of upper level divergence, which is pumping out mass.  However, the Tropical Low is over land which is preventing the development of a tropical cyclone.  As long as the Tropical Low remains over land, it will not develop into a tropical cyclone.  However, if the Tropical Low emerges over the Gulf of Carpentaria in a day or so, it could develop into a tropical cyclone.

A ridge in the middle levels of the atmosphere is steering the tropical low toward the east and that general motion is expected to continue for another 24 to 48 hours.  On its anticipated track the Tropical Low could emerge over the southwestern Gulf of Carpentaria south of Port Roper in 24 to 36 hours.

Although the Tropical Low is moving over land, it will still draw in enough moisture to be capable of producing locally heavy rain.  Flooding may be possible in some locations.

Tropical Cyclone Nathan Making Landfall in Northern Australia

The center of Tropical Cyclone Nathan is moving inland near Nhulunbuy, Australia.  At 9:00 p.m. EDT on Saturday the center of Tropical Cyclone Nathan was located at latitude 12.6°S and longitude 136.8°E which put it about 25 miles south of Nhulunbuy and about 90 miles north-northeast of Alyangula, Australia.  Nathan was moving toward the northwest at 8 m.p.h.  The maximum wind speed was 75 m.p.h. and there were gusts to 90 m.p.h.  The minimum surface pressure was 979 mb.

The atmospheric environment around Tropical Cyclone Nathan is favorable for intensification.  The upper level winds are light.  The circulation is well organized and there is upper level outflow pumping out mass.  Outflow channels extend to the northwest and southeast.  However, as the center moves over land, the circulation will weaken.  The center is expected to cross the northeastern corner of Arnhem Land and move back over water in a few hours.  The potential for re-intensification will depend on how far away from the coast the center moves.

A subtropical ridge located southwest of Nathan is steering it toward the northwest.  The ridge is expected to continue to steer the tropical cyclone in that direction for another day or so.  After that time Nathan is expected to start moving more toward the west and eventually toward the southwest and make another landfall on the northern coast of Australia,

Nathan is strong enough to cause some wind damage.  It could also produce a significant storm surge near where the center is making landfall.  Locally heavy rainfall could create possible flooding at inland locations.