|Dissipated||10 March 1899|
|Lowest pressure||880 hPa (mbar); 25.99 inHg|
(Lowest recorded pressure in the Southern Hemisphere)
|Fatalities||Over 300, possibly up to 410 (see casualties)|
|Areas affected||Queensland (Far North)|
|Part of the List of Australian region cyclones before 1969|
Cyclone Mahina was the deadliest cyclone in recorded Australian history, and also likely the most intense tropical cyclone ever recorded in the Southern Hemisphere. Mahina struck Bathurst Bay, Cape York Peninsula, Queensland, on 4 March 1899, and its winds and enormous storm surge combined to kill more than 300 people.
While the Australian Bureau of Meteorology, which is the Regional Specialized Meteorological Center of the basin, estimates Mahina's peak central pressure to be 914 hPa (26.99 inHg), the World Meteorological Organization is currently considering an application from Queensland scientists and researchers to have this value upgraded to 880 hPa (25.99 inHg), based on data from post-storm analysis. This would officially make Mahina the most intense cyclone recorded to have hit the Australian mainland, and the most intense tropical cyclone ever recorded in the Southern Hemisphere, a title currently held by Cyclone Winston. Cyclone Mahina also produced the largest storm surge on record, generating a 13-metre (43-foot)-high surge.
Tropical Cyclone Mahina struck Australia on 4 March 1899, with a likely minimum central pressure of 880 millibars (26 inHg). Mahina ranks among the most intense cyclones ever observed in the Southern Hemisphere and almost certainly as the most intense cyclone ever observed off the Eastern states of Australia in recorded history. Clement Lindley Wragge, Government Meteorologist for Queensland, pioneered the naming of such storms and gave this storm its name, Mahina.
Storms of such intensity occur extremely rarely. Scientists identified two other Category-4 or 5 super-cyclones that struck Australia, in the first half of the 19th century, from their effects on the Great Barrier Reef and the Gulf of Carpentaria. This same research shows that on average, such super-cyclones occur in the region only once every two or three centuries.
A pearling fleet, based at Thursday Island, Queensland, anchored in or near the bay before the storm. Within an hour, the storm drove much of the fleet ashore or onto the Great Barrier Reef; other vessels sank at their anchorages. Four schooners and the manned Channel Rock lightship were lost. A further two schooners were wrecked but later re-floated. The fleets lost 54 luggers, and a further 12 were wrecked but re-floated. People later rescued more than 30 survivors of the wrecked vessels from the shore; however, the storm killed more than 400 people, mostly non-European immigrant crew members. A depiction of the schooner Crest of the Wave in the storm was later sketched in a painting.
A storm surge, reportedly 13 metres (43 ft), swept across Princess Charlotte Bay and then inland about 5 kilometres (3.1 mi), destroying anything left of the Bathurst Bay pearling fleet and the settlement.
An eyewitness, constable J. M. Kenny, reported that a 48-foot (15 m) storm surge swept over their camp at Barrow Point atop a 40-foot (12 m)-high ridge and reached 3 miles (4.8 km) inland, the largest storm surge ever recorded. However, reviewing the evidence for this surge, some scientists modeled a surge only 2 metres (6 ft 7 in) to 3 metres (9.8 ft) in height, based on the official 914-hectopascal (27.0 inHg) central pressure. They also surveyed the area, seeking wave-cut escarpments and deposits characteristic of storm events, but found none higher than 5 metres (16 ft). Of the 48-foot (15 m) surge, they suggested an incorrectly cited ground level or an involvement of freshwater (rain) flooding. A later study considers this conclusion likely premature and questions the barometer reading as unreliable and not representative of the actual lowest pressure. This subsequent study also examined new evidence of exceptionally high storm surge and inundation.
The exact number of casualties is not known, as many deaths were not recorded. Estimates range between 307 and 410.
In September 1899, the Queensland Marine Department published a list of 247 known fatalities. The Queensland Registry of Births, Deaths and Marriages has 283 registered deaths attributed to the cyclone, including 250 on pearling ships. One of the pearling fleet owners estimated another 30 people not officially registered as crew were killed and not reported to the Cooktown Registrar.
Around 100 Aboriginal Australians were killed but not recorded, as Aboriginal people were not counted as part of the population at the time. They had tried to help shipwrecked men, but the back surge caught them and swept them into the sea. Only eight Aboriginal people were recorded among the casualties, all of whom died on shore.
The Queensland Historical Atlas reported the death toll as "307 pearl divers and sailors and an unreported number of Aborigines".
People found thousands of fish and some sharks and dolphins several kilometres (miles) inland, and the storm embedded rocks into trees. On Flinders Island (Queensland), people found dolphins on the 15.2-metre (50 ft) cliffs; however, this finding does not necessarily indicate a surge of this height; on this exposed site, wave run-up readily can produce these results even within the more modest calculated surge.
At Cape Melville, survivors erected a memorial stone to "The Pearlers" lost to the cyclone, naming 11 Europeans but only citing "over 300 coloured men" for the other seamen. The Anglican church on Thursday Island, Queensland, also commemorates this disaster.
Barometric pressure estimates
|1||Gwenda||1999||900 hPa (26.58 inHg)|
|3||George||2007||902 hPa (26.64 inHg)|
|4||Orson||1989||904 hPa (26.70 inHg)|
|5||Marcus||2018||905 hPa (26.72 inHg)|
|6||Theodore||1994||910 hPa (26.87 inHg)|
|Source: Australian Bureau of Meteorology|
Contemporary reports vary considerably in the reported lowest barometric pressures. The pressure recorded on the schooner Olive reasonably consistently show her lowest pressure recorded: 29.60 inches of mercury (1,002 hPa) to 29.10 inches of mercury (985 hPa) or between 29.00 inches of mercury (982 hPa) and 29.10 inches of mercury (985 hPa). In a further variant, "during the lull in the hurricane, the barometer on the Olive recorded" 29.70 inches of mercury (1,010 hPa) to 29.10 inches of mercury (985 hPa).
Most sources record the schooner Crest of the Wave observation as 27 inches of mercury (914 hPa). More modern reports of an 18 inches of mercury (610 hPa) observation on a vessel in the eye of Mahina are unrealistic (the most intense tropical cyclone, Typhoon Tip, had a central pressure 260 hectopascals (7.68 inHg) higher).
One author accepted the 29.1 inches of mercury (985 hPa) report from the Olive and the 27 inches of mercury (914 hPa) report from the Crest of the Wave, seemingly unaware of the discrepant reports. He estimated the track of the cyclone from the damage reports, placing it directly over the position of the Crest of the Wave. The Olive to the north missed the centre. The separation between these schooners explains the difference between their respective pressure measurements. He calculated the centre pressure, standardised for temperature, as 914 hectopascals (13.26 psi).
A study in 2014 found that the actual lowest pressure of the storm was around 880 hectopascals (26 inHg), based upon modeling of meteorological variables needed to induce the potentially world-record-setting surge height of 13 metres (43 ft). This surge closely matches new evidence on storm depositions and accounts actually reported to two other captains, and in a letter from an eyewitness to his parents, of a reading of 26 inches of mercury (880 hPa). This study considers the apparently third-hand report of 27 inches of mercury (914 hPa) an unreliable measurement made possibly five hours prior to passage of the eye.
In comparison, the tiny Cyclone Tracy devastated Darwin in 1974, with a central pressure of 950 hectopascals (28 inHg). Barometric pressure this low at mean sea level also likely caused Cyclone Mahina to create such an intense, phenomenal, claimed world-record storm surge that was not immediately known afterward.
In 2008, Ian Townsend published "The Devil's Eye: a novel" as a historical fiction novel based on Cyclone Mahina. The novel was developed as part of his research fellowship at the State Library of Queensland.
- List of disasters in Australia by death toll
- List of tropical cyclones
- List of tropical cyclone records
- 1899 Queensland colonial election, which occurred during the same month
- 1970 Bhola cyclone – The deadliest tropical cyclone worldwide, on record
- Cyclone Flores – The deadliest tropical cyclone recorded in the Southern Hemisphere
- Cyclone Winston (2016) – The most intense modern tropical cyclone in the Southern Hemisphere
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- Whittingham, H. E. 1958, The Bathurst Bay Hurricane and associated storm surge. Australian Meteorological Magazine 23: 14–36. Available on line at http://reg.bom.gov.au/amoj/docs/1958/whittingham2.pdf Archived 25 July 2011 at the Wayback Machine
- Pixley, N S, Pearlers of North Australia: the romantic story of the diving fleets. Journal of the Royal Historical Society of Queensland 9(3): 9–29. Available online at "Archived copy" (PDF). Archived (PDF) from the original on 5 March 2012. Retrieved 20 August 2013.CS1 maint: archived copy as title (link)
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- Nott, Jonathon; Hayne, Matthew (12 June 2000). "How high was the storm surge from Tropical Cyclone Mahina?" (PDF). Australian Journal of Emergency Management. Emergency Management Australia (Autumn 2000): 11–13. Archived (PDF) from the original on 28 September 2018. Retrieved 28 September 2018.
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- Bathurst Bay, Qld: Cyclone (incl Storm Surge) Archived 16 March 2009 at the Wayback Machine Emergency Management Australia Disasters Database. Accessed 29 December 2008.
- Ian Townsend (7 November 2015). "A Queensland disaster uncovered – Cyclone Mahina". BDM Family History Journal. Registry of Births, Deaths and Marriages. 7: 3.
- Tropical Cyclones: Hazard Modelling and Risk Assessment, GeoscienceAustralia Report no. 68013, 2006
- "Tropical cyclones". University of Queensland and Queensland Museum. 27 October 2010. Archived from the original on 22 November 2017.
- Outridge Monument "Archived copy". Archived from the original on 7 March 2011. Retrieved 31 January 2011.CS1 maint: archived copy as title (link)
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- Shay, John; Shay, Bev (1999), The greatest of all cyclones : Bathurst Bay – 1899 (Limited ed.), Cooktown and District Historical Society
- Townsend, Ian (2008), The devil's eye : a novel, Fourth Estate, ISBN 978-0-7322-8366-7
|Wikimedia Commons has media related to Cyclone Mahina.|
- Callaghan, Jeff (2011), Case study : the Bathurst Bay Hurricane, March 1899 (PDF), Brisbane, Qld Harden Up Protecting Queensland, archived (PDF) from the original on 22 October 2017, retrieved 23 October 2017
- The pearling disaster, 1899 : a memorial, 1899, retrieved 23 October 2017
- How high was the storm surge from Tropical Cyclone Mahina? by Jonathan Nott, James Cook University, & Matthew Hayne, Australian Geological Survey Organisation
- Video: The 1899 Pearling fleet disaster – an account by Ian Townsend. Created as part of the Queensland Stories project, State Library of Queensland, Australia. (4 minutes; Windows Media Player, RealPlayer)
- Natural disasters in Australia
- Australia's worst cyclone disasters – Queensland State Disaster Management Group