Category: Extremes affecting Canada

Heat wave occuring from August 30 2021 to September 06 2021 at 65.5°N 224.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 8 days

Time span: August 30 2021 to September 06 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 11.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 17.4 °C

Event center: 65.5°N 224.0°E

Area affected: 1008914 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_2021-Aug-30_to_2021-Sep-06_224.0_65.5

Heat wave occuring from August 28 2021 to September 03 2021 at 67.5°N 264.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 7 days

Time span: August 28 2021 to September 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.5 °C
  • Mean temperature: 8.3 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 10.1 °C

Event center: 67.5°N 264.5°E

Area affected: 51928 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_2021-Aug-28_to_2021-Sep-03_264.5_67.5

Heat wave occuring from August 25 2021 to September 03 2021 at 62.0°N 261.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 10 days

Time span: August 25 2021 to September 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 5.5 °C
  • Mean temperature: 14.8 °C
  • Maximum temperature anomaly: 8.8 °C
  • Maximum temperature: 19.1 °C

Event center: 62.0°N 261.5°E

Area affected: 1009037 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_2021-Aug-25_to_2021-Sep-03_261.5_62.0

Cold spell occuring from August 24 2021 to August 27 2021 at 53.0°N 261.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 4 days

Time span: August 24 2021 to August 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 11.5 °C
  • Minimum temperature anomaly: -6.6 °C
  • Minimum temperature: 9.8 °C

Event center: 53.0°N 261.0°E

Area affected: 50417 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-24_to_2021-Aug-27_261.0_53.0

Heat wave occuring from August 23 2021 to August 27 2021 at 80.5°N 298.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland

Duration: 5 days

Time span: August 23 2021 to August 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 2.0 °C
  • Maximum temperature anomaly: 7.1 °C
  • Maximum temperature: 6.4 °C

Event center: 80.5°N 298.0°E

Area affected: 53370 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_2021-Aug-23_to_2021-Aug-27_298.0_80.5

Cold spell occuring from August 17 2021 to August 24 2021 at 39.5°N 247.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 8 days

Time span: August 17 2021 to August 24 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -6.5 °C
  • Mean temperature: 13.6 °C
  • Minimum temperature anomaly: -12.9 °C
  • Minimum temperature: 3.6 °C

Event center: 39.5°N 247.5°E

Area affected: 1271579 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-17_to_2021-Aug-24_247.5_39.5

Heat wave occuring from August 16 2021 to August 19 2021 at 80.5°N 262.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 4 days

Time span: August 16 2021 to August 19 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 1.0 °C
  • Mean temperature: 0.8 °C
  • Maximum temperature anomaly: 2.3 °C
  • Maximum temperature: 2.1 °C

Event center: 80.5°N 262.5°E

Area affected: 131337 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_2021-Aug-16_to_2021-Aug-19_262.5_80.5

Heat wave occuring from August 14 2021 to August 16 2021 at 52.5°N 257.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 3 days

Time span: August 14 2021 to August 16 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 6.2 °C
  • Mean temperature: 23.4 °C
  • Maximum temperature anomaly: 8.7 °C
  • Maximum temperature: 25.5 °C

Event center: 52.5°N 257.0°E

Area affected: 129911 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_2021-Aug-14_to_2021-Aug-16_257.0_52.5

Heat wave occuring from August 09 2021 to August 14 2021 at 81.0°N 267.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 6 days

Time span: August 09 2021 to August 14 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.1 °C
  • Mean temperature: 4.7 °C
  • Maximum temperature anomaly: 6.7 °C
  • Maximum temperature: 11.3 °C

Event center: 81.0°N 267.5°E

Area affected: 53108 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_2021-Aug-09_to_2021-Aug-14_267.5_81.0

Cold spell occuring from August 08 2021 to August 17 2021 at 68.5°N 261.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 10 days

Time span: August 08 2021 to August 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 5.7 °C
  • Minimum temperature anomaly: -7.1 °C
  • Minimum temperature: -1.8 °C

Event center: 68.5°N 261.5°E

Area affected: 250680 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-17_261.5_68.5