Summary of Significant Severe Thunderstorm Events in NSW - 2004/05


30 June 2005
Torrential rain at Tweed Heads

Tweed Heads (Northern Rivers) recorded its wettest day on record for any month with 382mm to 9am on the 30th with a further 213mm recorded from 9am to 12.30pm on the 30th. Major flooding occurred in local streams with hundreds of people evacuated from Lismore. Thousands of people on the North Coast remained stranded by the flood waters days after the storms, and were reliant on food and medical drops by boat or helicopter. One person died following flooding in Byron Bay. The damage bill is estimated at $25 million for the Northern Rivers district. The rain was caused by an upper level low pressure combining with a surface trough.


29 April 2005
Hailstorms on South Coast

A severe thunderstorm at Ulladulla with 4cm hail and strong winds caused considerable damage to houses and vehicles. The storm lasted 10-15 minutes. The storm tracked north along the coastal fringe hitting Kiama (Illawarra) with 4cm hail and strong winds, smashing car windows and injuring several people.


20 February 2005
Singleton Hailstorm

Severe hailstorm with strong winds and hail up to 8.5cm size at Singleton in the Hunter. Damage to scores of motor vehicles.


1 and 2 February 2005
Severe thunderstorms, flash flooding, land gales and snow in NSW and Victoria

Southeast Australia has suffering the effect of one of the most intense summertime weather systems on record. A strong cold front brought very cold air up from the deep south that interacted with warm moist air lying over NSW to produce an intense low pressure system. This system deepened and moved south over Victoria and into Bass Strait on Wednesday evening, producing a wide variety of extreme weather. Total damage bill over 3 States was $217 million with 3 people killed.

While the worst affect area was Victoria, New South Wales has also experienced snow, strong winds, severe thunderstorms, dust storms and in some locations record cold temperatures for this time of year. Severe thunderstorms which developed in the very humid and unstable air ahead of the cold change, produced hail up to 6cm in diameter, severe wind gusts and very heavy rain leading to flash flooding.


9 November 2004
Giant hail at Casino

Giant hail up to 9cm was recorded at Casino on the North Coast, smashing car windscreens.


2 November 2004
Canberra

Thunderstorms with hail up to 4cm size damaged roof tiles and shredded vegetation in much of the Woden Valley and the southern suburbs of Macarthur and Gilmore. Very heavy rain at Curtin with 44.5mm recorded in 1 hour, which has an average return period of 1:50 years.


24 October 2004
Hunter and Mid North Coast

At Muswellbrook (Hunter) hail around 8cm in diameter caused widespread and severe damage to 180 houses and many motor vehicles resulting in the town being declared a natural disaster area. Many people injured by hail while trying to protect their cars. Muswellbrook Council's damage bill was expected to reach millions of dollars. At nearby Jerrys Plains hail 5-6cm in diameter, heavy rain and strong winds were reported. At Taree (Mid North Coast) 4cm sized hail blocked gutters causing roofs to collapse. At Jerrys Plains (Hunter) hail 5-6cm in diameter, heavy rain and strong winds were reported. At Port Macquarie (Mid-North Coast) 3cm sized hail, and 20mm of rain fell in 6 minutes which caused flash flooding west of Port Macquarie. 


19 September 2004
Heavy hailstorm Central Coast - Hunter area

Hail accumulated to a depth of 20cm on ground in Gosford area. At Toukley, very heavy pea-size hail accumulated to a depth of 15cm with drifts of half a metre deep. Roads closed, bulldozers used to clear roads. Rooves collapsed and local flooding reported. The University of Newcastle was closed after 123mm of rain. At Raymond Terrace, 5.5cm hail damaged houses and cars. Power outages occurred in the Port Stephens area.


5 September 2004
Widespread hail in Sydney (Fathers Day hailstorm)

Most of Sydney hit by hailstorm from Blacktown to the coast, north to Hornsby and south to Bankstown. Hail covered ground to depth of 5cm causing traffic chaos and local flooding.


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