Category: Heat waves affecting Antarctica

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: May 23 2025 to May 25 2025

Statistics over entire affected area:

• Mean temperature anomaly: 4.7 °C
• Mean temperature: -0.8 °C
• Maximum temperature anomaly: 6.8 °C
• Maximum temperature: 0.1 °C

Event center: -69.0°S 288.0°E

Area affected: 55823 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-May-23_to_2025-May-25_288.0_-69.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 6 days

Time span: May 19 2025 to May 24 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.7 °C
• Mean temperature: -44.4 °C
• Maximum temperature anomaly: 11.9 °C
• Maximum temperature: -37.5 °C

Event center: -83.0°S 20.5°E

Area affected: 335096 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-May-19_to_2025-May-24_20.5_-83.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: May 17 2025 to May 20 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.4 °C
• Mean temperature: -35.0 °C
• Maximum temperature anomaly: 10.7 °C
• Maximum temperature: -19.7 °C

Event center: -73.5°S 76.0°E

Area affected: 357981 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-May-17_to_2025-May-20_76.0_-73.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: May 15 2025 to May 17 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.9 °C
• Mean temperature: 0.2 °C
• Maximum temperature anomaly: 4.0 °C
• Maximum temperature: 1.8 °C

Event center: -59.5°S 87.0°E

Area affected: 86093 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-May-15_to_2025-May-17_87.0_-59.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 14 days

Time span: May 14 2025 to May 27 2025

Statistics over entire affected area:

• Mean temperature anomaly: 4.5 °C
• Mean temperature: -0.2 °C
• Maximum temperature anomaly: 15.1 °C
• Maximum temperature: 8.0 °C

Event center: -68.5°S 15.5°E

Area affected: 6115603 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-May-14_to_2025-May-27_15.5_-68.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: May 14 2025 to May 16 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.0 °C
• Mean temperature: -29.9 °C
• Maximum temperature anomaly: 10.4 °C
• Maximum temperature: -20.6 °C

Event center: -69.0°S 132.0°E

Area affected: 51230 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-May-14_to_2025-May-16_132.0_-69.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 7 days

Time span: May 09 2025 to May 15 2025

Statistics over entire affected area:

• Mean temperature anomaly: 10.4 °C
• Mean temperature: -41.9 °C
• Maximum temperature anomaly: 14.8 °C
• Maximum temperature: -25.7 °C

Event center: -88.0°S 345.5°E

Area affected: 473750 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-May-09_to_2025-May-15_345.5_-88.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 8 days

Time span: May 09 2025 to May 16 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.5 °C
• Mean temperature: 4.3 °C
• Maximum temperature anomaly: 5.9 °C
• Maximum temperature: 8.9 °C

Event center: -58.0°S 298.0°E

Area affected: 696656 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-May-09_to_2025-May-16_298.0_-58.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: May 08 2025 to May 10 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.7 °C
• Mean temperature: -1.3 °C
• Maximum temperature anomaly: 12.9 °C
• Maximum temperature: -0.1 °C

Event center: -73.0°S 274.5°E

Area affected: 70915 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-May-08_to_2025-May-10_274.5_-73.0