Black nor'easter
A black nor'easter is a persistent and potentially violent north-easterly
Developing offshore as a deep coastal trough, the storm is heralded by the rapid build-up of dense black cloud that brings heavy
Although not
Background
The cause of a black nor'easter is the gathering of moist cooler air from the south and the tropical humid flow from the north, where north easterly winds aggregate with the moisture, thereby creating dark, rain-filled clouds.
Conditions were undergoing a change, which portended unsettled, thundery weather with rain in scattered parts of the State. Yesterday afternoon a black nor'-easter raged, the wind attaining a mean average velocity of 26 miles.
Northeasterly
Unlike an
Formation
Black nor'easters are generally
Forecaster Craig Brokensha, describes a black nor'easter; "an unstable low pressure trough drifting from inland Australia, moisture feeding into another trough sitting adjacent the East Coast, with the two predicted to combine."[5] They can also be formed by a cool pool of air that arrive from the Great Australian Bight, whereby spurring a low-pressure system over the southeast simultaneously as a moisture-rich coastal trough (fueled by warm sea temperature) – This can cause higher evaporation, thereby raising the amount of liquid in the atmosphere. When this moisture is brought south by moist northeasterly winds and chilled by the cooler air in the upper-level low higher up, it condenses and falls as rain.[11]
Referred as an
Incidents
Due to the strong winds caused by the Black Nor'easterly storms, a number of people in
Notable storms
- In February 2010, Sydney received some of the highest and heaviest rainfalls in 25 years which were accompanied by violent thunderstorms and gusty winds that cut out power and damaged homes.[15][16][17] The heavy rain was caused by remnants of ex-tropical Cyclone Olga and by a massive amount of moisture blowing in on north-east winds which slammed into a low pressure trough.[18][19]
- On 18 November 2013, a tornado hit Hornsby, a suburb in the Upper North Shore.[20] The tornado's path was 2 km (1.2 mi) long and 50 m (160 ft) wide. The tornado blew off roofs and toppled large trees. The winds in the tornado reached 140 kilometres per hour (87 mph).[21][22] A total of 12 people were injured in the tornado.[20]
- The black nor'easter swell of June 2016 remoulded areas of the east Australian coastline, with
- Between 7 and 9 February 2020, the Hunter Valley and the Central Coast.[27]
- On blocking high in the Tasman Sea that directed a strong, moist, low pressure trough towards the NSW coast.[31]
- In late February and early March 2022, a black nor'easter persisted for nearly two weeks where it ravaged the southeast coast of Australia, flooding areas of major cities such as Brisbane, Lismore and as well as western Sydney, among other cities. Although the nor'easter turned into an east coast low as it moved south.[32]
- The July 2022 floods were caused by a black nor'easter due to tropical moisture that arrived from northern Australia which interacted with a low pressure trough on the New South Wales coast and later became an east coast low.[10]
- Between 4 and 6 April 2024, a black nor'easter dumped heavy rain in southern Queensland and New South Wales, killing one man in
See also
References
- ^ a b c Black nor'easter to soak Sydney and surrounds by Ben Domensino from Weatherzone. 4 April 2024. Retrieved 5 April 2024.
- Illawarra Daily Mercury. Wollongong, NSW: National Library of Australia. 8 January 1951. p. 10. Retrieved 27 March 2015.
- ^ "BLACK NOR-EASTER". The Sydney Morning Herald. National Library of Australia. 30 October 1911. p. 7. Retrieved 27 March 2015.
- ^ Month's worth of rain could fall in one day in east coast black nor'easter. by Benedict Brook from News.com.au. 5 April 2024.
- ^ a b c "From the beating heart of a Black Nor'Easter | Swellnet Dispatch". Swellnet. Retrieved 12 November 2018.
- ^ 30 Oct 1911 - BLACK NOR-EASTER by Trove. Retrieved 3 April 2024.
- ^ 'Black nor-easter' brings rain, storms to NSW, SEQ by The New Daily. 3 April 2024.
- ^ ABC News Australia. Tuesday, 19 July 2016
- ^ BOM warns of more wet weather, dangerous conditions as east coast low looms off NSW By Kate Doyle, ABC Weather. 2 March 2022.
- ^ a b East Coast soaking on Friday by Joel Pippard from Weatherzone. 3 April 2024.
- ^ Explained: What is causing the 'Black Nor'Easter' smashing Sydney? by Angus Thomson and Christopher Harris from The Sydney Morning Herald. 5 April 2024.
- ^ Man killed by falling tree in Federal as wild weather lashes northern NSW by By Donna Harper – ABC News
- ^ Sydney storm: Man killed after tree falls on moving car by BBC News
- ^ Man dies when tree falls on moving car in Sydney during wild storm by The Guardian
- ^ "Storm drenches Sydney". UPI.com. 12 February 2010. Retrieved 1 June 2010.
- ^ "Sydney dries out but regional threatened". News.smh.com.au. 12 February 2010. Retrieved 1 June 2010.
- ^ "Weather News - Wild storms lash Sydney". Weatherzone.com.au. 13 February 2010. Archived from the original on 16 February 2010. Retrieved 1 June 2010.
- ^ "Rain swamps Sydney's water catchments". Smh.com.au. 7 February 2010. Retrieved 1 June 2010.
- ^ Huffer, Julie (10 February 2010). "Heaviest rain in almost 20 years - Environment - News | Hornsby & Upper North Shore Advocate". Hornsby-advocate.whereilive.com.au. Archived from the original on 20 January 2013. Retrieved 1 June 2010.
- ^ a b "Roof collapses at movie theatre at Westfield Hornsby". 18 November 2013.
- ^ Clean-up continues after tornado strikes at Hornsby in Sydney's north
- ^ "Hornsby was hit by a tornado, Bureau of Meteorology confirms". The Sydney Morning Herald.
- ^ Rain: Warragamba Dam gets huge boost as chaos reigns in wake of weekend deluge in NSW, Queensland by The Australian, 10 February 2020
- ^ Sydney rains: Record rainfall brings flooding but puts out mega-blaze by the BBC News, 10 February 2020
- ^ Thousands Without Power As NSW Cops Heaviest Rain In Two Decades by 10 daily, 9 February 2020
- 7 News, 9 February 2020
- ^ NSW weather: residents evacuated from flooded areas and thousands left without power by Calla Wahlquist and Australian Associated Press from The Guardian. 9 Feb 2020
- ^ NSW weather: mini-tornado damages homes in Chester Hill, says NSW Premier Gladys Berejiklian by ABC News. 20 March 2021
- ^ House floats down river in Wingham as dangerous weather system leaves a path of destruction by ABC News. 20 March 2021
- ^ Record rains, flooding prompt evacuations in Australia Archived 2021-03-25 at the Wayback Machine by Yahoo! News
- ^ Widespread rain to fall in all states as two storms form in Australia's east and west by Ben Deacon from ABC News. 20 March 2021
- ^ "Savage weather batters south-east Queensland with deadly flash flooding escalating". The Guardian. 25 February 2022. Archived from the original on 27 February 2022. Retrieved 27 February 2022.
- ^ Man found dead in Queensland floods as black nor'easter weather system hits eastern Australia Luca Ittimani with Australian Associated Press. The Guardian. 4 April 2024. Retrieved 6 April 2024.
- ^ Evacuation and extreme weather warnings issued after heavy rain falls across parts of Sydney and the Illawarra by ABC meteorologist Tom Saunders, Brooke Chandler and Jesse Hyland. ABC News. 6 April 2024.
- ^ Evacuation and extreme weather warnings issued after heavy rain falls across parts of Sydney and the Illawarra by ABC meteorologist Tom Saunders, Brooke Chandler and Jesse Hyland. ABC News. 6 April 2024.