Category: Extremes affecting Canada

Cold spell occuring from July 27 2021 to August 08 2021 at 48.0°N 290.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 13 days

Time span: July 27 2021 to August 08 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 13.4 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: 4.4 °C

Event center: 48.0°N 290.5°E

Area affected: 1594819 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-Aug-08_290.5_48.0

Cold spell occuring from July 22 2021 to August 07 2021 at 66.0°N 282.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 17 days

Time span: July 22 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 4.1 °C
  • Minimum temperature anomaly: -9.6 °C
  • Minimum temperature: -2.0 °C

Event center: 66.0°N 282.0°E

Area affected: 981487 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-22_to_2021-Aug-07_282.0_66.0

Heat wave occuring from July 20 2021 to August 07 2021 at 63.5°N 305.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland

Duration: 19 days

Time span: July 20 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 9.7 °C
  • Maximum temperature anomaly: 12.6 °C
  • Maximum temperature: 25.2 °C

Event center: 63.5°N 305.0°E

Area affected: 637989 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-20_to_2021-Aug-07_305.0_63.5

Heat wave occuring from July 19 2021 to July 24 2021 at 59.0°N 266.0°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: July 19 2021 to July 24 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.9 °C
  • Mean temperature: 11.8 °C
  • Maximum temperature anomaly: 9.3 °C
  • Maximum temperature: 18.4 °C

Event center: 59.0°N 266.0°E

Area affected: 52833 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-19_to_2021-Jul-24_266.0_59.0

Cold spell occuring from July 15 2021 to July 20 2021 at 58.5°N 238.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 6 days

Time span: July 15 2021 to July 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.5 °C
  • Mean temperature: 10.1 °C
  • Minimum temperature anomaly: -9.7 °C
  • Minimum temperature: -0.9 °C

Event center: 58.5°N 238.5°E

Area affected: 827826 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-15_to_2021-Jul-20_238.5_58.5

Heat wave occuring from July 15 2021 to August 02 2021 at 70.0°N 223.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 19 days

Time span: July 15 2021 to August 02 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 15.6 °C
  • Maximum temperature anomaly: 12.7 °C
  • Maximum temperature: 24.2 °C

Event center: 70.0°N 223.0°E

Area affected: 719595 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-15_to_2021-Aug-02_223.0_70.0

Heat wave occuring from July 13 2021 to July 19 2021 at 56.5°N 299.0°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: July 13 2021 to July 19 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 11.2 °C
  • Maximum temperature anomaly: 12.3 °C
  • Maximum temperature: 24.1 °C

Event center: 56.5°N 299.0°E

Area affected: 393900 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-13_to_2021-Jul-19_299.0_56.5

Heat wave occuring from July 12 2021 to July 22 2021 at 41.5°N 294.5°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 12 2021 to July 22 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.3 °C
  • Mean temperature: 24.7 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 27.4 °C

Event center: 41.5°N 294.5°E

Area affected: 523226 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-12_to_2021-Jul-22_294.5_41.5

Cold spell occuring from July 12 2021 to July 17 2021 at 71.5°N 236.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 6 days

Time span: July 12 2021 to July 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.8 °C
  • Mean temperature: 2.4 °C
  • Minimum temperature anomaly: -9.0 °C
  • Minimum temperature: 0.1 °C

Event center: 71.5°N 236.0°E

Area affected: 265124 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-12_to_2021-Jul-17_236.0_71.5

Heat wave occuring from July 11 2021 to July 17 2021 at 62.5°N 294.5°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: July 11 2021 to July 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 5.7 °C
  • Maximum temperature anomaly: 5.8 °C
  • Maximum temperature: 10.5 °C

Event center: 62.5°N 294.5°E

Area affected: 78193 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-11_to_2021-Jul-17_294.5_62.5