Category: Cold spells affecting Tonga

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 5 days

Time span: January 11 2025 to January 15 2025

Statistics over entire affected area:

• Mean temperature anomaly: -1.7 °C
• Mean temperature: 23.3 °C
• Minimum temperature anomaly: -2.4 °C
• Minimum temperature: 22.0 °C

Event center: -22.0°S 184.0°E

Area affected: 68277 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-Jan-11_to_2025-Jan-15_184.0_-22.0

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 3 days

Time span: October 05 2023 to October 07 2023

Statistics over entire affected area:

• Mean temperature anomaly: -1.9 °C
• Mean temperature: 21.9 °C
• Minimum temperature anomaly: -2.9 °C
• Minimum temperature: 19.8 °C

Event center: -19.5°S 187.0°E

Area affected: 139938 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_2023-Oct-05_to_2023-Oct-07_187.0_-19.5

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 5 days

Time span: June 12 2023 to June 16 2023

Statistics over entire affected area:

• Mean temperature anomaly: -1.7 °C
• Mean temperature: 23.0 °C
• Minimum temperature anomaly: -3.1 °C
• Minimum temperature: 20.6 °C

Event center: -19.5°S 188.0°E

Area affected: 230887 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_2023-Jun-12_to_2023-Jun-16_188.0_-19.5

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 6 days

Time span: March 09 2022 to March 14 2022

Statistics over entire affected area:

• Mean temperature anomaly: -0.9 °C
• Mean temperature: 26.2 °C
• Minimum temperature anomaly: -1.4 °C
• Minimum temperature: 25.4 °C

Event center: -18.0°S 183.5°E

Area affected: 254373 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_2022-Mar-09_to_2022-Mar-14_183.5_-18.0

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 8 days

Time span: August 20 2021 to August 27 2021

Statistics over entire affected area:

• Mean temperature anomaly: -1.8 °C
• Mean temperature: 16.5 °C
• Minimum temperature anomaly: -3.0 °C
• Minimum temperature: 10.8 °C

Event center: -27.0°S 184.5°E

Area affected: 1001186 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-Aug-20_to_2021-Aug-27_184.5_-27.0

Download data: JSON

Event type: Cold spell

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

• Tonga

Duration: 8 days

Time span: August 08 2021 to August 15 2021

Statistics over entire affected area:

• Mean temperature anomaly: -1.7 °C
• Mean temperature: 17.6 °C
• Minimum temperature anomaly: -2.9 °C
• Minimum temperature: 13.8 °C

Event center: -25.5°S 178.0°E

Area affected: 1378798 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-Aug-08_to_2021-Aug-15_178.0_-25.5