Category: Extremes affecting Antarctica

Cold spell occuring from April 14 2025 to April 21 2025 at -84.5°S 250.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 8 days

Time span: April 14 2025 to April 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.8 °C
  • Mean temperature: -44.8 °C
  • Minimum temperature anomaly: -15.0 °C
  • Minimum temperature: -58.1 °C

Event center: -84.5°S 250.5°E

Area affected: 336339 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_2025-Apr-14_to_2025-Apr-21_250.5_-84.5

Heat wave occuring from April 13 2025 to April 15 2025 at -86.0°S 25.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 3 days

Time span: April 13 2025 to April 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.8 °C
  • Mean temperature: -42.8 °C
  • Maximum temperature anomaly: 11.4 °C
  • Maximum temperature: -40.8 °C

Event center: -86.0°S 25.5°E

Area affected: 65092 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_2025-Apr-13_to_2025-Apr-15_25.5_-86.0

Heat wave occuring from April 12 2025 to April 15 2025 at -72.0°S 267.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 4 days

Time span: April 12 2025 to April 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.7 °C
  • Mean temperature: -1.0 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: 0.5 °C

Event center: -72.0°S 267.0°E

Area affected: 129160 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_2025-Apr-12_to_2025-Apr-15_267.0_-72.0

Heat wave occuring from April 11 2025 to May 13 2025 at -69.0°S 302.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 33 days

Time span: April 11 2025 to May 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 10.8 °C
  • Mean temperature: -26.2 °C
  • Maximum temperature anomaly: 24.7 °C
  • Maximum temperature: 8.2 °C

Event center: -69.0°S 302.0°E

Area affected: 14721798 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_2025-Apr-11_to_2025-May-13_302.0_-69.0

Cold spell occuring from April 11 2025 to April 15 2025 at -66.0°S 74.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 5 days

Time span: April 11 2025 to April 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.5 °C
  • Mean temperature: -16.2 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: -22.3 °C

Event center: -66.0°S 74.5°E

Area affected: 141507 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_2025-Apr-11_to_2025-Apr-15_74.5_-66.0

Cold spell occuring from April 07 2025 to April 11 2025 at -85.0°S 219.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 5 days

Time span: April 07 2025 to April 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -11.8 °C
  • Mean temperature: -37.3 °C
  • Minimum temperature anomaly: -18.3 °C
  • Minimum temperature: -44.0 °C

Event center: -85.0°S 219.0°E

Area affected: 113326 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_2025-Apr-07_to_2025-Apr-11_219.0_-85.0

Heat wave occuring from April 05 2025 to April 12 2025 at -70.0°S 186.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 8 days

Time span: April 05 2025 to April 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.0 °C
  • Mean temperature: -3.7 °C
  • Maximum temperature anomaly: 14.2 °C
  • Maximum temperature: 2.7 °C

Event center: -70.0°S 186.0°E

Area affected: 1183460 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_2025-Apr-05_to_2025-Apr-12_186.0_-70.0

Cold spell occuring from April 05 2025 to April 09 2025 at -77.0°S 350.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 5 days

Time span: April 05 2025 to April 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.5 °C
  • Mean temperature: -46.7 °C
  • Minimum temperature anomaly: -12.4 °C
  • Minimum temperature: -52.8 °C

Event center: -77.0°S 350.0°E

Area affected: 112212 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_2025-Apr-05_to_2025-Apr-09_350.0_-77.0

Heat wave occuring from March 31 2025 to April 15 2025 at -75.5°S 282.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica
  • Argentina
  • Chile

Duration: 16 days

Time span: March 31 2025 to April 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.4 °C
  • Mean temperature: -6.5 °C
  • Maximum temperature anomaly: 23.1 °C
  • Maximum temperature: 15.6 °C

Event center: -75.5°S 282.5°E

Area affected: 5218903 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_2025-Mar-31_to_2025-Apr-15_282.5_-75.5

Cold spell occuring from March 29 2025 to April 06 2025 at -85.5°S 358.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 9 days

Time span: March 29 2025 to April 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.8 °C
  • Mean temperature: -57.1 °C
  • Minimum temperature anomaly: -8.9 °C
  • Minimum temperature: -60.0 °C

Event center: -84.0°S 0.0°E

Area affected: 246397 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_2025-Mar-29_to_2025-Apr-06_358.5_-85.5