Category: Extremes affecting Canada

Heat wave occuring from August 08 2021 to August 13 2021 at 41.5°N 275.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 6 days

Time span: August 08 2021 to August 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.4 °C
  • Mean temperature: 25.8 °C
  • Maximum temperature anomaly: 5.6 °C
  • Maximum temperature: 28.1 °C

Event center: 41.5°N 275.5°E

Area affected: 88833 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-08_to_2021-Aug-13_275.5_41.5

Heat wave occuring from August 07 2021 to August 17 2021 at 36.0°N 241.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 11 days

Time span: August 07 2021 to August 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 24.0 °C
  • Maximum temperature anomaly: 10.2 °C
  • Maximum temperature: 38.4 °C

Event center: 36.0°N 241.0°E

Area affected: 2132267 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-07_to_2021-Aug-17_241.0_36.0

Cold spell occuring from August 07 2021 to August 10 2021 at 64.5°N 234.5°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 07 2021 to August 10 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 9.0 °C
  • Minimum temperature anomaly: -8.1 °C
  • Minimum temperature: 5.4 °C

Event center: 64.5°N 234.5°E

Area affected: 98932 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-07_to_2021-Aug-10_234.5_64.5

Cold spell occuring from August 04 2021 to August 07 2021 at 61.0°N 284.0°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 04 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: 6.9 °C
  • Minimum temperature anomaly: -6.9 °C
  • Minimum temperature: 3.7 °C

Event center: 61.0°N 284.0°E

Area affected: 156384 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-04_to_2021-Aug-07_284.0_61.0

Cold spell occuring from August 04 2021 to August 06 2021 at 61.5°N 260.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 3 days

Time span: August 04 2021 to August 06 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: 8.6 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 6.7 °C

Event center: 61.5°N 260.0°E

Area affected: 65221 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-04_to_2021-Aug-06_260.0_61.5

Cold spell occuring from August 04 2021 to August 06 2021 at 65.0°N 265.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 3 days

Time span: August 04 2021 to August 06 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: 6.7 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: 2.2 °C

Event center: 65.0°N 265.0°E

Area affected: 51869 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-04_to_2021-Aug-06_265.0_65.0

Cold spell occuring from August 03 2021 to August 15 2021 at 68.5°N 247.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 13 days

Time span: August 03 2021 to August 15 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.9 °C
  • Mean temperature: 4.3 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 1.3 °C

Event center: 68.5°N 247.0°E

Area affected: 84447 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-03_to_2021-Aug-15_247.0_68.5

Heat wave occuring from July 31 2021 to August 12 2021 at 86.0°N 118.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Svalbard and Jan Mayen

Duration: 13 days

Time span: July 31 2021 to August 12 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 0.7 °C
  • Mean temperature: 1.1 °C
  • Maximum temperature anomaly: 4.1 °C
  • Maximum temperature: 6.5 °C

Event center: 86.0°N 118.5°E

Area affected: 951435 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-Jul-31_to_2021-Aug-12_118.5_86.0

Heat wave occuring from July 28 2021 to August 07 2021 at 53.0°N 307.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 11 days

Time span: July 28 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 12.3 °C
  • Maximum temperature anomaly: 7.2 °C
  • Maximum temperature: 19.1 °C

Event center: 53.0°N 307.0°E

Area affected: 560422 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-Jul-28_to_2021-Aug-07_307.0_53.0

Cold spell occuring from July 27 2021 to July 30 2021 at 86.0°N 345.5°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: July 27 2021 to July 30 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -0.6 °C
  • Mean temperature: 0.1 °C
  • Minimum temperature anomaly: -1.1 °C
  • Minimum temperature: -0.4 °C

Event center: 86.0°N 345.5°E

Area affected: 164136 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-Jul-27_to_2021-Jul-30_345.5_86.0