Category: Extremes affecting Sierra Leone

Cold spell occuring from December 26 2010 to December 31 2010 at 7.0°N 349.0°E

Download data: JSON

Event type: Cold spell

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

  • Liberia
  • Sierra Leone

Duration: 6 days

Time span: December 26 2010 to December 31 2010

Statistics over entire affected area:

  • Mean temperature anomaly: -1.1 °C
  • Mean temperature: 24.9 °C
  • Minimum temperature anomaly: -1.6 °C
  • Minimum temperature: 23.0 °C

Event center: 7.0°N 349.0°E

Area affected: 70684 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_2010-Dec-26_to_2010-Dec-31_349.0_7.0

Cold spell occuring from September 04 2010 to September 07 2010 at 10.0°N 348.5°E

Download data: JSON

Event type: Cold spell

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

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

Duration: 4 days

Time span: September 04 2010 to September 07 2010

Statistics over entire affected area:

  • Mean temperature anomaly: -1.6 °C
  • Mean temperature: 22.4 °C
  • Minimum temperature anomaly: -2.8 °C
  • Minimum temperature: 20.0 °C

Event center: 10.0°N 348.5°E

Area affected: 237919 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_2010-Sep-04_to_2010-Sep-07_348.5_10.0

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

Cold spell occuring from April 27 2010 to May 04 2010 at 9.5°N 347.5°E

Download data: JSON

Event type: Cold spell

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

  • Guinea
  • Sierra Leone

Duration: 8 days

Time span: April 27 2010 to May 04 2010

Statistics over entire affected area:

  • Mean temperature anomaly: -1.9 °C
  • Mean temperature: 26.0 °C
  • Minimum temperature anomaly: -3.3 °C
  • Minimum temperature: 23.5 °C

Event center: 9.5°N 347.5°E

Area affected: 85222 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_2010-Apr-27_to_2010-May-04_347.5_9.5

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