The 2020-21 Australian Region Cyclone Season was a near average season with 9 named storms and 15 Tropical lows, 2 of these became severe tropical cyclones, those being Dianne and Frances. The cyclones caused more deaths and damage then predicted. Everything is measured is measured in Australian.
Seasonal Forecasts[]
Source | Date | Tropical
storms |
Cyclones | Severe
Cyclones | |
BOM | October 15, 2017 | 14 | 10 | 1 | |
- | |||||
Actual activity | 15 | 9 | 2 |
Storms[]
|
The 2020–21 Australian Region Cyclone Season is the period of the year when most tropical cyclones form within the Southern Indian Ocean and Pacific Oceans between 90°E and 160°E. The season officially ran from November 1, 2020 to April 30, 2021, however a tropical cyclone could form at any time between July 1, 2020 and June 30, 2021 and would count towards the season total. During the season, tropical cyclones will be officially monitored, by one of the five Tropical Cyclone Warning Centres (TCWCs, Which are Perth TCWC, Darwin TCWC, Brisbane TCWC, Port Moresby TCWC and Jakarta TCWC) that are operated in this region.
Timeline[]
Tropical Low 01U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | December 16, 2020 |
Dissipated | December 19, 2020 |
Highest winds | 10-minute sustained: 60 km/h (40 mph) 3-minute sustained: 75 km/h (45 mph) 1-minute sustained: 85 km/h (50 mph) Gusts: 95 km/h (60 mph) |
Lowest pressure | 997 hPa (mbar); 29.44 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | Western Australia |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Zane[]
Category 2 tropical cyclone (Aus scale) | |
---|---|
Category 1 tropical cyclone (SSHWS) | |
Formed | December 20, 2020 |
Dissipated | December 26, 2020 |
Highest winds | 10-minute sustained: 100 km/h (65 mph) 3-minute sustained: 115 km/h (75 mph) 1-minute sustained: 125 km/h (80 mph) Gusts: 140 km/h (85 mph) |
Lowest pressure | 977 hPa (mbar); 28.85 inHg |
Fatalities | 3 Total |
Damage | $1 million (2017 USD) |
Areas affected | Queensland |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Low 03U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | December 30, 2020 |
Dissipated | January 1, 2021 |
Highest winds | 10-minute sustained: 55 km/h (35 mph) 3-minute sustained: 70 km/h (45 mph) 1-minute sustained: 80 km/h (50 mph) Gusts: 100 km/h (65 mph) |
Lowest pressure | 998 hPa (mbar); 29.47 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | Northern Territory |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Low 04U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | January 8, 2021 |
Dissipated | January 10, 2021 |
Highest winds | 10-minute sustained: 45 km/h (30 mph) 3-minute sustained: 55 km/h (35 mph) 1-minute sustained: 75 km/h (45 mph) Gusts: 85 km/h (50 mph) |
Lowest pressure | 1000 hPa (mbar); 29.53 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | N/A |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Alfred[]
Category 1 tropical cyclone (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | January 13, 2021 |
Dissipated | January 20, 2021 |
Highest winds | 10-minute sustained: 85 km/h (50 mph) 3-minute sustained: 95 km/h (60 mph) 1-minute sustained: 110 km/h (70 mph) Gusts: 130 km/h (80 mph) |
Lowest pressure | 983 hPa (mbar); 29.03 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | N/A |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Low 06U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | January 25, 2021 |
Dissipated | January 28, 2021 |
Highest winds | 10-minute sustained: 55 km/h (35 mph) 3-minute sustained: 65 km/h (40 mph) 1-minute sustained: 80 km/h (50 mph) Gusts: 100 km/h (65 mph) |
Lowest pressure | 997 hPa (mbar); 29.44 inHg |
Fatalities | 2 Total |
Damage | $0.3 million (2017 USD) |
Areas affected | Queensland |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Bianca[]
Category 2 tropical cyclone (Aus scale) | |
---|---|
Category 1 tropical cyclone (SSHWS) | |
Formed | February 1, 2021 |
Dissipated | February 8, 2021 |
Highest winds | 10-minute sustained: 100 km/h (65 mph) 3-minute sustained: 115 km/h (75 mph) 1-minute sustained: 135 km/h (85 mph) Gusts: 150 km/h (90 mph) |
Lowest pressure | 977 hPa (mbar); 28.85 inHg |
Fatalities | 5 Total |
Damage | $1 million (2017 USD) |
Areas affected | Western Australia |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Caleb[]
Category 2 tropical cyclone (Aus scale) | |
---|---|
Category 1 tropical cyclone (SSHWS) | |
Formed | February 13, 2021 |
Dissipated | February 18, 2021 |
Highest winds | 10-minute sustained: 105 km/h (65 mph) 3-minute sustained: 120 km/h (75 mph) 1-minute sustained: 140 km/h (85 mph) Gusts: 155 km/h (100 mph) |
Lowest pressure | 976 hPa (mbar); 28.82 inHg |
Fatalities | 4 Total |
Damage | $2.3 million (2017 USD) |
Areas affected | Northern Territory |
Part of the 2017-18 Australian Region Cyclone Season |
Severe Tropical Cyclone Dianne[]
Category 4 severe tropical cyclone (Aus scale) | |
---|---|
Category 3 tropical cyclone (SSHWS) | |
Formed | February 24, 2021 |
Dissipated | March 5, 2021 |
Highest winds | 10-minute sustained: 180 km/h (110 mph) 3-minute sustained: 195 km/h (120 mph) 1-minute sustained: 205 km/h (125 mph) Gusts: 225 km/h (140 mph) |
Lowest pressure | 934 hPa (mbar); 27.58 inHg |
Fatalities | 57 Total |
Damage | $456.6 million (2017 USD) |
Areas affected | Queensland |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Edna[]
Category 2 tropical cyclone (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | March 14, 2021 |
Dissipated | March 21, 2021 |
Highest winds | 10-minute sustained: 95 km/h (60 mph) 3-minute sustained: 100 km/h (65 mph) 1-minute sustained: 110 km/h (70 mph) Gusts: 130 km/h (80 mph) |
Lowest pressure | 979 hPa (mbar); 28.91 inHg |
Fatalities | 3 Total |
Damage | $0.1 million (2017 USD) |
Areas affected | Queensland |
Part of the 2017 Australian Region Cyclone Season |
Severe Tropical Cyclone Frances[]
Category 5 severe tropical cyclone (Aus scale) | |
---|---|
Category 5 tropical cyclone (SSHWS) | |
Formed | March 16, 2021 |
Dissipated | March 27, 2021 |
Highest winds | 10-minute sustained: 260 km/h (160 mph) 3-minute sustained: 270 km/h (165 mph) 1-minute sustained: 280 km/h (175 mph) Gusts: 295 km/h (185 mph) |
Lowest pressure | 911 hPa (mbar); 26.9 inHg |
Fatalities | 76 Total |
Damage | $234.8 million (2017 USD) |
Areas affected | Western Australia |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Low 12U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | April 2, 2021 |
Dissipated | April 5, 2021 |
Highest winds | 10-minute sustained: 55 km/h (35 mph) 3-minute sustained: 65 km/h (40 mph) 1-minute sustained: 85 km/h (50 mph) Gusts: 95 km/h (60 mph) |
Lowest pressure | 998 hPa (mbar); 29.47 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | N/A |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Grant[]
Category 1 tropical cyclone (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | April 5, 2021 |
Dissipated | April 11, 2021 |
Highest winds | 10-minute sustained: 85 km/h (50 mph) 3-minute sustained: 100 km/h (65 mph) 1-minute sustained: 110 km/h (70 mph) Gusts: 130 km/h (80 mph) |
Lowest pressure | 986 hPa (mbar); 29.12 inHg |
Fatalities | 3 Total |
Damage | $0.9 million (2017 USD) |
Areas affected | Northern Territory |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Cyclone Hilda[]
Category 2 tropical cyclone (Aus scale) | |
---|---|
Category 1 tropical cyclone (SSHWS) | |
Formed | April 18, 2021 |
Dissipated | April 26, 2021 |
Highest winds | 10-minute sustained: 100 km/h (65 mph) 3-minute sustained: 110 km/h (70 mph) 1-minute sustained: 120 km/h (75 mph) Gusts: 140 km/h (85 mph) |
Lowest pressure | 978 hPa (mbar); 28.88 inHg |
Fatalities | 2 Total |
Damage | $1.1 million (2017 USD) |
Areas affected | New Caledonia |
Part of the 2017-18 Australian Region Cyclone Season |
Tropical Low 15U[]
Tropical low (Aus scale) | |
---|---|
Tropical storm (SSHWS) | |
Formed | April 28, 2021 |
Dissipated | May 1, 2021 |
Highest winds | 10-minute sustained: 45 km/h (30 mph) 3-minute sustained: 55 km/h (35 mph) 1-minute sustained: 65 km/h (40 mph) Gusts: 85 km/h (50 mph) |
Lowest pressure | 1000 hPa (mbar); 29.53 inHg |
Fatalities | N/A |
Damage | N/A |
Areas affected | N/A |
Part of the 2017 Australian Region Cyclone Season |
Accumulated Cyclone Energy (ACE) Rating[]
ACE (104 kt2) = Storm: Source | |||||
1 | 31.17 | Frances | 8 | 0.00 | Storm |
---|---|---|---|---|---|
2 | 28.27 | Dianne | 9 | 0.00 | Storm |
3 | 15.79 | Caleb | 10 | 0.00 | Storm |
4 | 14.62 | Zane | 11
0.00 |
Storm | |
5 | 14.45 | Bianca | 12
0.00 |
Storm | |
6 | 14.37 | Hilda | 13
0.00 |
Storm | |
7 | 9.66 | Alfred | 14
0.00 Storm | ||
8 | 9.50 | Grant | 15
0.00 Storm | ||
9 | 4.22 | 01U | 16
0.00 Storm | ||
10 | 3.66 | 03U | 17
0.00 Storm | ||
11 | 3.57 | 12U | 18
0.00 Storm | ||
11 | 3.09 | 04U | 19
0.00 Storm | ||
12 | 2.99 | 15U | 20
0.00 Storm | ||
Total=122.46 |
Seasonal Effects[]
Storm name |
Dates active | Storm category at peak intensity |
Max 1-min wind mph (km/h) |
Min. press. (mbar) |
Areas affected | Damage (USD) |
Deaths |
---|---|---|---|---|---|---|---|
01U | December 16 - December 19 | Tropical storm | 40 (60) | 997 | Western Australia (Pilbara) | minimal | none |
Zane | December 20 -December 26 | Category 2 hurricane | 65 (100) | 977 | Queensland (Central Coast) | 1 million | 3 |
03U | December 30 - January 1 | Tropical storm | 35 (55) | 998 | Northern Territory (Top End) | minimal | none |
04U | January 8 - January 10 | Tropical storm | 30 (45) | 1000 | none | minimal | none |
Alfred | January 13 - January 20 | Category 1 hurricane | 50 (85) | 983 | none | minimal | none |
06U | January 25 - January 28 | Tropical storm | 35 (55) | 997 | Queensland (Central Coast) | 0.3 million | 2 |
Bianca | February 1 - February 8 | Category 2 hurricane | 65 (100) | 977 | Western Australia (Pilbara) | 1 million | 5 |
Caleb | February 13 - February 18 | Category 2 hurricane | 65 (105) | 976 | Northern Territory (Top End) | 2.3 million | 4 |
Dianne | February 24 - March 5 | Category 4 hurricane | 110 (180) | 934 | Queensland (North Tropical Coast) | 456.6 million | 57 |
Edna | March 14 - March 21 | Category 2 hurricane | 60 (95) | 979 | Queensland (Central Coast) | 0.1 million | 3 |
Frances | March 16 - March 27 | Category 5 hurricane | 160 (260) | 911 | Western Australia (Pilbara) | 234.8 million | 76 |
12U | April 2 - April 5 | Tropical storm | 35 (55) | 998 | none | minimal | none |
Grant | April 5 - April 11 | Category 1 hurricane | 50 (85) | 986 | Northern Territory (Top End) | 0.9 million | 3 |
Hilda | April 18 - April 26 | Category 2 hurricane | 65 (100) | 978 | New Caledonia | 1.1 million | 2 |
15U | April 28 - May 1 | Tropical storm | 30 (45) | 1000 | none | minimal | none |