1989–90 Australian region cyclone season
cyclone season in the Australian region
The 1989–90 Australian region cyclone season was an above average tropical cyclone season. 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
Systems
Tropical Storm 02S
Tropical Storm 02S existed from 14 July to 16 July.
Tropical Cyclone Pedro
At 0:00 UTC on 6 November, the BOM detected an area of low pressure within a monsoonal trough near 7.8°S, 97.2°E., which gradually organized while drifting westward for the next couple of days. On 8 November, the disturbance strengthened into a tropical cyclone and was named Pedro. The cyclone continued to intensify before reaching its peak intensity at 13:00 UTC on November 10 with 10-minute sustained winds of around 70 mph (110 km/h) and a minimum pressure of 982 mbar (29.0 inHg), with a short-lived eye visible on satellite imagery. As Pedro moved southward, strong vertical wind shear left the low-level center bare and displaced convection to the northwestern side of the storm.
Begin with the source’s own compact description: “1989–90 Australian region cyclone season” is cyclone season in the Australian region. The dossier treats that line as a proposition to test through Australian, region and cyclone, not as a finished interpretation.
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The phrase “cyclone season in the Australian region” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Feb 6, 2026. The linked authority identifier is Q4585611. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1989 and 1990.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “1989–90 Australian region cyclone season” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.