Category: Extremes affecting United States

Download data: JSON

Event type: Heat wave

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

• United States

Duration: 8 days

Time span: January 05 2025 to January 12 2025

Statistics over entire affected area:

• Mean temperature anomaly: 4.2 °C
• Mean temperature: 10.0 °C
• Maximum temperature anomaly: 7.2 °C
• Maximum temperature: 15.3 °C

Event center: 38.5°N 237.5°E

Area affected: 73483 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-Jan-05_to_2025-Jan-12_237.5_38.5

Download data: JSON

Event type: Heat wave

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

• United States

Duration: 5 days

Time span: January 02 2025 to January 06 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.6 °C
• Mean temperature: 3.8 °C
• Maximum temperature anomaly: 12.7 °C
• Maximum temperature: 9.6 °C

Event center: 41.0°N 247.5°E

Area affected: 237048 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-Jan-02_to_2025-Jan-06_247.5_41.0

Download data: JSON

Event type: Heat wave

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

• United States

Duration: 10 days

Time span: December 30 2024 to January 08 2025

Statistics over entire affected area:

• Mean temperature anomaly: 3.7 °C
• Mean temperature: 4.7 °C
• Maximum temperature anomaly: 11.2 °C
• Maximum temperature: 6.3 °C

Event center: 54.5°N 200.5°E

Area affected: 678193 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_2024-Dec-30_to_2025-Jan-08_200.5_54.5

Download data: JSON

Event type: Heat wave

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

• United States

Duration: 5 days

Time span: December 28 2024 to January 01 2025

Statistics over entire affected area:

• Mean temperature anomaly: 5.5 °C
• Mean temperature: 12.7 °C
• Maximum temperature anomaly: 8.0 °C
• Maximum temperature: 18.0 °C

Event center: 40.0°N 286.5°E

Area affected: 60784 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_2024-Dec-28_to_2025-Jan-01_286.5_40.0