1989–90 Australian region cyclone season

1989–90 Australian region cyclone season
Season summary map
First system formed July 14, 1989
Last system dissipated April 18, 1990
Strongest storm1 Alex – 925 hPa (mbar), 240 km/h (150 mph) (10-minute sustained)
Tropical lows 14
Tropical cyclones 5
Severe tropical cyclones 1
Total fatalities Unknown
Total damage Unknown
1Strongest storm is determined by lowest pressure
Australian region tropical cyclone seasons
1987–88, 1988–89, 1989–90, 1990–91, 1991–92
Related articles

The 1989–90 Australian region cyclone season was slightly above average. It was also an event in the ongoing cycle of tropical cyclone formation. It ran from 1 November 1989 to 30 April 1990. The regional tropical cyclone operational plan also defines a tropical cyclone year separately from a tropical cyclone season, and the "tropical cyclone year" ran from 1 July 1989 to 30 June 1990.

Tropical cyclones in this area were monitored by four Tropical Cyclone Warning Centres (TCWCs): the Australian Bureau of Meteorology in Perth, Darwin, and Brisbane; and TCWC Port Moresby in Papua New Guinea.

Seasonal summary

Tropical Storm 02S

Tropical storm (SSHWS)
Duration July 14 – July 16
Peak intensity 65 km/h (40 mph) (1-min)  997 hPa (mbar)

Tropical Storm 02S existed from July 14 to July 16.

Tropical Cyclone Pedro

Category 2 tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration November 4 – November 13
Peak intensity 110 km/h (70 mph) (10-min)  982 hPa (mbar)

Tropical Cyclone Pedro existed from November 4 to November 13.

Tropical Cyclone Felicity

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration 13 December – 20 December
Peak intensity 110 km/h (70 mph) (10-min)  975 hPa (mbar)

On 13 December, the BoM started to monitor a monsoon low, that had developed within the Arafura Sea to the northeast of Darwin.[1] Over the next day, the system moved southeastwards over the Northern Territory, before it re-curved slightly and entered the Gulf Of Carpentaria.[1] Early on 15 December, the system was named Felicity by TCWC Brisbane, after it had become a category 1 tropical cyclone on the Australian Scale.[1] During that day the JTWC initiated advisories on the system and designated it as Tropical Cyclone 07P, with peak 1-minute sustained wind speeds of 110 km/h (70 mph).[2] TCWC Brisbane subsequently reported peak 10-minute sustained wind speeds of 110 km/h (70 mph), before the system made landfall over the Cape York Peninsula where weakened below cyclone intensity.[1] The system subsequently moved into the Coral Sea during 16 December, where it started to rapidly deepen, but did not reattain the classical characteristics of a tropical cyclone.[1][3] As a result, both TCWC Nadi and TCWC Brisbane treated the system as a tropical depression over the next four days despite winds of between 110 and 115 km/h (68 and 71 mph) being observed in the southwest quadrant.[1][3] Felicity subsequently dissipated during 20 December as it was absorbed by a short-wave trough of low pressure to the north of New Zealand.[1][3] Some minor damage to vegetation was recorded on the Cape York Peninsular.[1][3]

Tropical Cyclone Rosita

Category 2 tropical cyclone (Australian scale)
Duration January 4 – January 17
Peak intensity 95 km/h (60 mph) (10-min)  988 hPa (mbar)

Rosita, 4 to 17 January 1990, Indian Ocean

Severe Tropical Cyclone Sam

Category 3 severe tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration January 11 – January 21
Peak intensity 150 km/h (90 mph) (10-min)  966 hPa (mbar)

Sam, 11 to 21 January 1990, near Western Australia

Tropical Cyclone Tina

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Clockwise vortex
Duration January 24 – January 29
Peak intensity 100 km/h (65 mph) (10-min)  972 hPa (mbar)

Tina, 24 to 29 January 1990, crossed Western Australia

Tropical Cyclone Nancy

Category 2 tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration January 26 – February 4
Peak intensity 110 km/h (70 mph) (10-min)  975 hPa (mbar)

On February 3, 1990, Cyclone Nancy made landfall near Byron Bay, bringing flashfloods that killed five people.

Severe Tropical Cyclone Vincent

Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration February 25 – March 6
Peak intensity 150 km/h (90 mph) (10-min)  965 hPa (mbar)

Vincent, 25 February to 6 March 1990, near Western Australia

Tropical Cyclone Greg

Category 1 tropical cyclone (Australian scale)
Tropical depression (SSHWS)
Duration February 28 – March 5
Peak intensity 75 km/h (45 mph) (10-min)  990 hPa (mbar)

Greg, 28 February to 5 March 1990, Gulf of Carpentaria

Tropical Cyclone Walter-Gregoara

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration March 4 – March 13 (Exited basin)
Peak intensity 100 km/h (65 mph) (10-min) 

Walter, 3 to 27 March 1990, Indian Ocean

Tropical Cyclone Hilda

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration March 4 – March 7
Peak intensity 110 km/h (70 mph) (10-min)  970 hPa (mbar)

Cyclone Hilda had cloud tops estimated at 62,000 feet tall. The measured cloud top temperature was -152 °F, which is the coldest cloud-top temperature ever measured.

Severe Tropical Cyclone Alex

Category 5 severe tropical cyclone (Australian scale)
Category 4 tropical cyclone (SSHWS)
Duration March 14 – March 26
Peak intensity 215 km/h (130 mph) (10-min)  925 hPa (mbar)

Alex was a fairly intense system. It existed from 14 to 26 March 1990. Despite the intensity, Alex never caused significant damage.

Severe Tropical Cyclone Ivor

Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration March 14 – March 26
Peak intensity 130 km/h (80 mph) (10-min)  965 hPa (mbar)

Ivor, 14 to 26 March 1990, crossed Cape York, Queensland

Tropical Cyclone Bessi

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration April 11 – April 18
Peak intensity 85 km/h (50 mph) (10-min)  990 hPa (mbar)

Bessi, 11 to 18 April 1990, Indian Ocean

See also

References

  1. 1 2 3 4 5 6 7 8 Tropical Cyclone Felicity (Report). Australian Bureau of Meteorology. Archived from the original on 7 April 2012. Retrieved 26 May 2014.
  2. ↑ Joint Typhoon Warning Center; Naval Pacific Meteorology and Oceanography Center. Annual Tropical Cyclone Report: 1990 (PDF) (Report). United States Navy, United States Air Force. p. 234. Retrieved 26 May 2014.
  3. 1 2 3 4 Singh, Arveen K; Fiji Meteorological Service (Summer 1990). DeAngellis, Richard M, ed. "Tropical depression in Coral Sea (former T.C. Felicity), December 18–20, 1989" (Mariners Weather Log). 34 (3). United States National Oceanic and Atmospheric Administration's National Oceanographic Data Service: 48. hdl:2027/uiug.30112104094245.
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