Category: Extremes affecting New Zealand

Heat wave occuring from September 20 2020 to September 23 2020 at -46.5°S 168.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 4 days

Time span: September 20 2020 to September 23 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: 10.2 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 15.0 °C

Event center: -46.5°S 168.5°E

Area affected: 65706 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Sep-20_to_2020-Sep-23_168.5_-46.5

Cold spell occuring from September 18 2020 to September 30 2020 at -61.0°S 153.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica
  • Australia
  • New Zealand

Duration: 13 days

Time span: September 18 2020 to September 30 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: -8.7 °C
  • Minimum temperature anomaly: -15.2 °C
  • Minimum temperature: -45.5 °C

Event center: -61.0°S 153.0°E

Area affected: 6211934 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2020-Sep-18_to_2020-Sep-30_153.0_-61.0

Cold spell occuring from September 12 2020 to September 14 2020 at -31.0°S 182.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 3 days

Time span: September 12 2020 to September 14 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -1.6 °C
  • Mean temperature: 15.0 °C
  • Minimum temperature anomaly: -1.9 °C
  • Minimum temperature: 14.1 °C

Event center: -31.0°S 182.0°E

Area affected: 79932 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2020-Sep-12_to_2020-Sep-14_182.0_-31.0

Cold spell occuring from September 11 2020 to September 15 2020 at -29.5°S 177.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 5 days

Time span: September 11 2020 to September 15 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 14.5 °C
  • Minimum temperature anomaly: -3.3 °C
  • Minimum temperature: 11.7 °C

Event center: -29.5°S 177.0°E

Area affected: 483743 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2020-Sep-11_to_2020-Sep-15_177.0_-29.5

Heat wave occuring from September 03 2020 to September 05 2020 at -48.5°S 168.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 3 days

Time span: September 03 2020 to September 05 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 1.8 °C
  • Mean temperature: 9.3 °C
  • Maximum temperature anomaly: 2.4 °C
  • Maximum temperature: 11.5 °C

Event center: -48.5°S 168.5°E

Area affected: 64166 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Sep-03_to_2020-Sep-05_168.5_-48.5

Heat wave occuring from August 28 2020 to September 02 2020 at -42.0°S 186.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 6 days

Time span: August 28 2020 to September 02 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 12.9 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 15.6 °C

Event center: -42.0°S 186.0°E

Area affected: 1216185 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Aug-28_to_2020-Sep-02_186.0_-42.0

Heat wave occuring from August 11 2020 to October 13 2020 at -32.5°S 240.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Australia
  • Fiji
  • French Polynesia
  • New Zealand
  • Norfolk Island
  • Samoa
  • Solomon Islands
  • Tonga
  • Vanuatu

Duration: 64 days

Time span: August 11 2020 to October 13 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 17.7 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 28.5 °C

Event center: -32.5°S 240.5°E

Area affected: 28663922 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Aug-11_to_2020-Oct-13_240.5_-32.5

Heat wave occuring from July 22 2020 to August 06 2020 at -15.5°S 165.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Australia
  • Fiji
  • New Caledonia
  • New Zealand
  • Norfolk Island
  • Solomon Islands
  • Vanuatu

Duration: 16 days

Time span: July 22 2020 to August 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 16.3 °C
  • Maximum temperature anomaly: 6.1 °C
  • Maximum temperature: 27.5 °C

Event center: -15.5°S 165.5°E

Area affected: 8407268 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Jul-22_to_2020-Aug-06_165.5_-15.5

Heat wave occuring from July 04 2020 to July 06 2020 at -46.5°S 175.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • New Zealand

Duration: 3 days

Time span: July 04 2020 to July 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 9.1 °C
  • Maximum temperature anomaly: 5.8 °C
  • Maximum temperature: 12.8 °C

Event center: -46.5°S 175.5°E

Area affected: 156159 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Jul-04_to_2020-Jul-06_175.5_-46.5

Heat wave occuring from July 04 2020 to July 23 2020 at -16.0°S 178.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Fiji
  • New Caledonia
  • New Zealand
  • Samoa
  • Tonga
  • Vanuatu

Duration: 20 days

Time span: July 04 2020 to July 23 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 28.8 °C

Event center: -16.0°S 178.0°E

Area affected: 6835840 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2020-Jul-04_to_2020-Jul-23_178.0_-16.0