Bulahdelah tornado
| Meteorological history | |
|---|---|
| Formed | January 1, 1970, 1:45 p.m. AEST (UTC+10:00) |
| Dissipated | Unknown |
| Duration | Unknown |
| Unknown-strength tornado | |
| Highest winds | ≥333 km/h (≥207 mph)[note 1] |
| Overall effects | |
| Fatalities | 0 |
| Injuries | 0 |
| Areas affected | Around Bulahdelah, New South Wales |
Part of the tornado outbreaks of 1970 | |
The 1970 Bulahdelah tornado was a violent tornado which occurred near the town of Bulahdelah 100 kilometres (62.1 mi) north-northeast of Newcastle, New South Wales, Australia on 1 January 1970, and is thought to be the most destructive and powerful tornado ever documented in Australia.[1][2] On BoM's storm archive, the tornado is given the rating of F0 and contains maximum confirmed winds of 63 km/h (39 mph).
The tornado left a damage path 22 kilometres (14 mi) long and 1.6 km (0.99 mi) wide through the Bulahdelah State Forest.[1] It is estimated that the tornado destroyed over one million trees.[1] Numerous trees were snapped with some being debranched and debarked. A caravan was destroyed and a 2,000 kg (4,400 lb) tractor was lifted into the air, stripped down to its frame and landing upside down. From damage analysis, the storm was stated to have "incredible devastation" and is predicted to have had high end F4-F5 intensity; however, it was never officially rated.[3][4][5] The tornado was reported by witnesses as a swirling black cloud surrounded by flying debris, and producing a thunderous roaring sound.[4] The weather system that produced the tornado was a classic set-up for violent tornadoes of the United States.[4]
See also
[edit]- Bucca tornado, another violent tornado in Australia in 1992.
- 1876 Bowen tornado, the strongest tornado in Australian history.
- List of tornadoes and tornado outbreaks
- List of Southern Hemisphere tornadoes and tornado outbreaks
- Australian Tornadoes - Past and Present
Notes
[edit]- ^ The tornado's accepted wind speed is quite debatable. It is estimated by the locals in Bulahdelah and surrounding areas that the tornado's wind speed was in the F4-F5 range (tornado winds over 333 km/h (207 mph)), but the BoM never did a proper survey on the storm at the time. The highest wind speed that BoM recorded was 63 km/h (39 mph), even below the F0 threshold; a value that lays in the Severe Storms Archive. The tornado's true wind speed remains unknown to this day.
References
[edit]- ^ a b c "Stormy Weather: A century of storms, fire, flood and drought in New South Wales" (PDF). Bureau of Meteorology. Retrieved 19 April 2017.
- ^ "23 September 2003: Australian thunderstorm climatology". Bureau of Meteorology. Retrieved 5 April 2008.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ "Tornadoes of Australia and New Zealand". The Weather Doctor. Archived from the original on 20 August 2019. Retrieved 5 April 2008.
- ^ a b c Shanahan, B (April 1985). "Bulahdelah Tornado Report" (PDF). Bureau of Meteorology. Retrieved 10 February 2012.
- ^ "Severe Storms Archive - Tornado". Bureau of Meteorology.