Category: Extremes affecting South Africa

Cold spell occuring from April 08 2023 to April 12 2023 at -30.0°S 19.5°E

Download data: JSON

Event type: Cold spell

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

  • Namibia
  • South Africa

Duration: 5 days

Time span: April 08 2023 to April 12 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 13.8 °C
  • Minimum temperature anomaly: -8.9 °C
  • Minimum temperature: 9.8 °C

Event center: -30.0°S 19.5°E

Area affected: 215391 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-Apr-08_to_2023-Apr-12_19.5_-30.0

Heat wave occuring from April 01 2023 to May 14 2023 at -18.5°S 14.5°E

Download data: JSON

Event type: Heat wave

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

  • Angola
  • Botswana
  • Eswatini
  • Lesotho
  • Mozambique
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 44 days

Time span: April 01 2023 to May 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.1 °C
  • Mean temperature: 24.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 31.4 °C

Event center: -18.5°S 14.5°E

Area affected: 2862259 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_2023-Apr-01_to_2023-May-14_14.5_-18.5

Cold spell occuring from March 26 2023 to April 01 2023 at -34.0°S 26.0°E

Download data: JSON

Event type: Cold spell

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

  • South Africa

Duration: 7 days

Time span: March 26 2023 to April 01 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -2.1 °C
  • Mean temperature: 17.5 °C
  • Minimum temperature anomaly: -3.4 °C
  • Minimum temperature: 14.9 °C

Event center: -34.0°S 26.0°E

Area affected: 71448 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-Mar-26_to_2023-Apr-01_26.0_-34.0

Heat wave occuring from March 18 2023 to March 22 2023 at -33.5°S 34.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 5 days

Time span: March 18 2023 to March 22 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 25.5 °C
  • Maximum temperature anomaly: 4.7 °C
  • Maximum temperature: 27.1 °C

Event center: -33.5°S 34.0°E

Area affected: 262691 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_2023-Mar-18_to_2023-Mar-22_34.0_-33.5

Cold spell occuring from February 24 2023 to March 02 2023 at -23.0°S 34.5°E

Download data: JSON

Event type: Cold spell

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

  • Mozambique
  • South Africa
  • Zimbabwe

Duration: 7 days

Time span: February 24 2023 to March 02 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.2 °C
  • Mean temperature: 23.7 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: 21.2 °C

Event center: -23.0°S 34.5°E

Area affected: 164954 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-Feb-24_to_2023-Mar-02_34.5_-23.0

Heat wave occuring from February 23 2023 to February 28 2023 at -26.0°S 16.5°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • Namibia
  • South Africa

Duration: 6 days

Time span: February 23 2023 to February 28 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 29.5 °C
  • Maximum temperature anomaly: 5.1 °C
  • Maximum temperature: 32.4 °C

Event center: -26.0°S 16.5°E

Area affected: 153220 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_2023-Feb-23_to_2023-Feb-28_16.5_-26.0

Cold spell occuring from February 17 2023 to March 11 2023 at -33.0°S 17.5°E

Download data: JSON

Event type: Cold spell

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

  • South Africa

Duration: 23 days

Time span: February 17 2023 to March 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 16.6 °C
  • Minimum temperature anomaly: -7.3 °C
  • Minimum temperature: 14.4 °C

Event center: -33.0°S 17.5°E

Area affected: 64905 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-Feb-17_to_2023-Mar-11_17.5_-33.0

Cold spell occuring from February 16 2023 to March 28 2023 at -16.5°S 11.5°E

Download data: JSON

Event type: Cold spell

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

  • Angola
  • Namibia
  • South Africa

Duration: 41 days

Time span: February 16 2023 to March 28 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 21.3 °C
  • Minimum temperature anomaly: -7.7 °C
  • Minimum temperature: 13.9 °C

Event center: -16.5°S 11.5°E

Area affected: 763233 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-Feb-16_to_2023-Mar-28_11.5_-16.5

Cold spell occuring from February 08 2023 to February 11 2023 at -30.5°S 25.0°E

Download data: JSON

Event type: Cold spell

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

  • Lesotho
  • South Africa

Duration: 4 days

Time span: February 08 2023 to February 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.0 °C
  • Mean temperature: 17.2 °C
  • Minimum temperature anomaly: -8.1 °C
  • Minimum temperature: 10.6 °C

Event center: -30.5°S 25.0°E

Area affected: 254455 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-Feb-08_to_2023-Feb-11_25.0_-30.5

Heat wave occuring from February 04 2023 to February 14 2023 at -32.0°S 7.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 11 days

Time span: February 04 2023 to February 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 24.5 °C
  • Maximum temperature anomaly: 3.2 °C
  • Maximum temperature: 26.7 °C

Event center: -30.0°S 338.5°E

Area affected: 2545050 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_2023-Feb-04_to_2023-Feb-14_7.0_-32.0