Category: Heat waves affecting Sierra Leone

3 heat waves identified in Sierra Leone since 2020

Heat wave occuring from January 05 2012 to January 15 2012 at 6.0°N 354.5°E

Download data: JSON

Event type: Heat wave

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

  • Côte d’Ivoire
  • Guinea
  • Liberia
  • Sierra Leone

Duration: 11 days

Time span: January 05 2012 to January 15 2012

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 27.0 °C
  • Maximum temperature anomaly: 2.3 °C
  • Maximum temperature: 28.8 °C

Event center: 6.0°N 354.5°E

Area affected: 98216 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_2012-Jan-05_to_2012-Jan-15_354.5_6.0

Heat wave occuring from October 02 2011 to October 13 2011 at 13.5°N 350.0°E

Download data: JSON

Event type: Heat wave

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

  • Burkina Faso
  • Côte d’Ivoire
  • Gambia
  • Guinea
  • Guinea-Bissau
  • Liberia
  • Mali
  • Mauritania
  • Senegal
  • Sierra Leone

Duration: 12 days

Time span: October 02 2011 to October 13 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 1.7 °C
  • Mean temperature: 28.6 °C
  • Maximum temperature anomaly: 4.0 °C
  • Maximum temperature: 34.4 °C

Event center: 13.5°N 350.0°E

Area affected: 824269 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_2011-Oct-02_to_2011-Oct-13_350.0_13.5

Heat wave occuring from September 03 2011 to September 05 2011 at 11.5°N 346.5°E

Download data: JSON

Event type: Heat wave

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

  • Guinea
  • Guinea-Bissau
  • Senegal
  • Sierra Leone

Duration: 3 days

Time span: September 03 2011 to September 05 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 26.5 °C
  • Maximum temperature anomaly: 2.2 °C
  • Maximum temperature: 28.6 °C

Event center: 11.5°N 346.5°E

Area affected: 78849 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_2011-Sep-03_to_2011-Sep-05_346.5_11.5

Heat wave occuring from January 20 2011 to February 09 2011 at 22.5°N 359.0°E

Download data: JSON

Event type: Heat wave

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

  • Algeria
  • Benin
  • Burkina Faso
  • Cameroon
  • Chad
  • Côte d’Ivoire
  • Egypt
  • Eritrea
  • Ethiopia
  • Ghana
  • Guinea
  • Libya
  • Mali
  • Mauritania
  • Niger
  • Nigeria
  • Saudi Arabia
  • Senegal
  • Sierra Leone
  • Sudan
  • Togo
  • Tunisia

Duration: 21 days

Time span: January 20 2011 to February 09 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 5.6 °C
  • Mean temperature: 23.2 °C
  • Maximum temperature anomaly: 11.7 °C
  • Maximum temperature: 32.9 °C

Event center: 22.5°N 1.0°W

Area affected: 9975057 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_2011-Jan-20_to_2011-Feb-09_359.0_22.5

Heat wave occuring from July 29 2010 to August 03 2010 at 9.5°N 344.5°E

Download data: JSON

Event type: Heat wave

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

  • Sierra Leone

Duration: 6 days

Time span: July 29 2010 to August 03 2010

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 26.5 °C
  • Maximum temperature anomaly: 1.3 °C
  • Maximum temperature: 27.1 °C

Event center: 9.5°N 344.5°E

Area affected: 97705 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_2010-Jul-29_to_2010-Aug-03_344.5_9.5

Heat wave occuring from July 11 2010 to July 14 2010 at 6.5°N 348.0°E

Download data: JSON

Event type: Heat wave

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

  • Sierra Leone

Duration: 4 days

Time span: July 11 2010 to July 14 2010

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 26.6 °C
  • Maximum temperature anomaly: 1.6 °C
  • Maximum temperature: 27.3 °C

Event center: 6.5°N 348.0°E

Area affected: 245785 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_2010-Jul-11_to_2010-Jul-14_348.0_6.5

Heat wave occuring from January 06 2010 to January 12 2010 at 8.0°N 352.0°E

Download data: JSON

Event type: Heat wave

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

  • Côte d’Ivoire
  • Guinea
  • Sierra Leone

Duration: 7 days

Time span: January 06 2010 to January 12 2010

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 27.7 °C
  • Maximum temperature anomaly: 3.1 °C
  • Maximum temperature: 29.9 °C

Event center: 8.0°N 352.0°E

Area affected: 119209 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_2010-Jan-06_to_2010-Jan-12_352.0_8.0

Heat wave occuring from June 15 2026 to June 19 2026 at 10.0°N 349.5°E

Download data: JSON

Event type: Heat wave

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

  • Guinea
  • Liberia
  • Sierra Leone

Duration: 5 days

Time span: June 15 2026 to June 19 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 26.7 °C
  • Maximum temperature anomaly: 2.3 °C
  • Maximum temperature: 28.4 °C

Event center: 10.0°N 349.5°E

Area affected: 189286 km$^2$



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jun-15_to_2026-Jun-19_349.5_10.0

Heat wave occuring from May 26 2026 to June 19 2026 at 8.0°N 339.5°E

Download data: JSON

Event type: Heat wave

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

  • Guinea
  • Guinea-Bissau
  • Sierra Leone

Duration: 25 days

Time span: May 26 2026 to June 19 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 27.3 °C
  • Maximum temperature anomaly: 2.0 °C
  • Maximum temperature: 28.9 °C

Event center: 8.0°N 339.5°E

Area affected: 814304 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_2026-May-26_to_2026-Jun-19_339.5_8.0