Category: Extremes affecting New Zealand

Heat wave occuring from March 09 2021 to March 18 2021 at -50.5°S 179.0°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 10 days

Time span: March 09 2021 to March 18 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 12.3 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 17.5 °C

Event center: -50.5°S 179.0°E

Area affected: 2551163 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_2021-Mar-09_to_2021-Mar-18_179.0_-50.5

Heat wave occuring from February 25 2021 to March 02 2021 at -49.0°S 162.0°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: February 25 2021 to March 02 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 14.6 °C
  • Maximum temperature anomaly: 6.2 °C
  • Maximum temperature: 18.3 °C

Event center: -49.0°S 162.0°E

Area affected: 149913 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_2021-Feb-25_to_2021-Mar-02_162.0_-49.0

Heat wave occuring from February 20 2021 to March 14 2021 at -48.0°S 174.5°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 23 days

Time span: February 20 2021 to March 14 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.3 °C
  • Mean temperature: 17.8 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 28.2 °C

Event center: -48.0°S 174.5°E

Area affected: 8723545 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_2021-Feb-20_to_2021-Mar-14_174.5_-48.0

Heat wave occuring from February 19 2021 to February 27 2021 at -48.5°S 182.5°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 9 days

Time span: February 19 2021 to February 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 12.2 °C
  • Maximum temperature anomaly: 4.0 °C
  • Maximum temperature: 17.1 °C

Event center: -48.5°S 182.5°E

Area affected: 1218746 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_2021-Feb-19_to_2021-Feb-27_182.5_-48.5

Cold spell occuring from February 17 2021 to February 20 2021 at -35.0°S 178.5°E

Download data: JSON

Event type: Cold spell

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

  • New Zealand

Duration: 4 days

Time span: February 17 2021 to February 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -1.7 °C
  • Mean temperature: 19.1 °C
  • Minimum temperature anomaly: -3.2 °C
  • Minimum temperature: 17.1 °C

Event center: -35.0°S 178.5°E

Area affected: 167828 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_2021-Feb-17_to_2021-Feb-20_178.5_-35.0

Cold spell occuring from February 16 2021 to February 20 2021 at -38.5°S 174.0°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: February 16 2021 to February 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 16.1 °C
  • Minimum temperature anomaly: -5.1 °C
  • Minimum temperature: 9.9 °C

Event center: -38.5°S 174.0°E

Area affected: 144262 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_2021-Feb-16_to_2021-Feb-20_174.0_-38.5

Cold spell occuring from February 07 2021 to February 17 2021 at -27.5°S 157.5°E

Download data: JSON

Event type: Cold spell

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

  • Australia
  • New Zealand

Duration: 11 days

Time span: February 07 2021 to February 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: 15.9 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: 6.7 °C

Event center: -27.5°S 157.5°E

Area affected: 3221272 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_2021-Feb-07_to_2021-Feb-17_157.5_-27.5

Heat wave occuring from February 06 2021 to February 12 2021 at -53.5°S 194.0°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 7 days

Time span: February 06 2021 to February 12 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 11.6 °C
  • Maximum temperature anomaly: 4.1 °C
  • Maximum temperature: 16.9 °C

Event center: -53.5°S 194.0°E

Area affected: 1006669 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_2021-Feb-06_to_2021-Feb-12_194.0_-53.5

Cold spell occuring from January 28 2021 to January 31 2021 at -39.5°S 173.5°E

Download data: JSON

Event type: Cold spell

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

  • New Zealand

Duration: 4 days

Time span: January 28 2021 to January 31 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 14.8 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 8.9 °C

Event center: -39.5°S 173.5°E

Area affected: 97439 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_2021-Jan-28_to_2021-Jan-31_173.5_-39.5

Cold spell occuring from January 18 2021 to January 21 2021 at -43.5°S 170.5°E

Download data: JSON

Event type: Cold spell

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

  • New Zealand

Duration: 4 days

Time span: January 18 2021 to January 21 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -3.5 °C
  • Mean temperature: 12.2 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: 0.5 °C

Event center: -43.5°S 170.5°E

Area affected: 156757 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_2021-Jan-18_to_2021-Jan-21_170.5_-43.5