Category: Extremes affecting Canada

Heat wave occuring from April 24 2021 to May 09 2021 at 50.5°N 300.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 16 days

Time span: April 24 2021 to May 09 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 5.7 °C
  • Maximum temperature anomaly: 6.8 °C
  • Maximum temperature: 11.0 °C

Event center: 50.5°N 300.5°E

Area affected: 229462 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-Apr-24_to_2021-May-09_300.5_50.5

Heat wave occuring from April 24 2021 to April 27 2021 at 85.0°N 224.5°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: April 24 2021 to April 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: -10.2 °C
  • Maximum temperature anomaly: 6.3 °C
  • Maximum temperature: -9.0 °C

Event center: 85.0°N 224.5°E

Area affected: 133968 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-Apr-24_to_2021-Apr-27_224.5_85.0

Cold spell occuring from April 22 2021 to May 01 2021 at 59.0°N 244.0°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: April 22 2021 to May 01 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -9.6 °C
  • Mean temperature: -10.3 °C
  • Minimum temperature anomaly: -20.0 °C
  • Minimum temperature: -23.1 °C

Event center: 59.0°N 244.0°E

Area affected: 1507332 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-Apr-22_to_2021-May-01_244.0_59.0

Heat wave occuring from April 22 2021 to April 28 2021 at 60.0°N 218.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 7 days

Time span: April 22 2021 to April 28 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 7.7 °C
  • Maximum temperature anomaly: 6.1 °C
  • Maximum temperature: 11.1 °C

Event center: 60.0°N 218.5°E

Area affected: 213914 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-Apr-22_to_2021-Apr-28_218.5_60.0

Heat wave occuring from April 20 2021 to April 28 2021 at 50.0°N 309.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 9 days

Time span: April 20 2021 to April 28 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 3.7 °C
  • Maximum temperature anomaly: 4.1 °C
  • Maximum temperature: 6.9 °C

Event center: 50.0°N 309.5°E

Area affected: 65508 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-Apr-20_to_2021-Apr-28_309.5_50.0

Heat wave occuring from April 19 2021 to May 19 2021 at 59.5°N 300.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland

Duration: 31 days

Time span: April 19 2021 to May 19 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 7.7 °C
  • Mean temperature: -4.9 °C
  • Maximum temperature anomaly: 21.1 °C
  • Maximum temperature: 11.8 °C

Event center: 59.5°N 300.5°E

Area affected: 6799531 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-Apr-19_to_2021-May-19_300.5_59.5

Cold spell occuring from April 19 2021 to April 21 2021 at 49.0°N 271.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 3 days

Time span: April 19 2021 to April 21 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -7.0 °C
  • Mean temperature: -0.9 °C
  • Minimum temperature anomaly: -9.9 °C
  • Minimum temperature: -6.8 °C

Event center: 49.0°N 271.5°E

Area affected: 251857 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-Apr-19_to_2021-Apr-21_271.5_49.0

Heat wave occuring from April 13 2021 to May 02 2021 at 60.5°N 207.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 20 days

Time span: April 13 2021 to May 02 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 5.6 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: 20.4 °C

Event center: 60.5°N 207.0°E

Area affected: 3150432 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-Apr-13_to_2021-May-02_207.0_60.5

Cold spell occuring from April 11 2021 to April 16 2021 at 74.5°N 257.0°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: April 11 2021 to April 16 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -6.6 °C
  • Mean temperature: -26.4 °C
  • Minimum temperature anomaly: -10.6 °C
  • Minimum temperature: -31.6 °C

Event center: 74.5°N 257.0°E

Area affected: 93174 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-Apr-11_to_2021-Apr-16_257.0_74.5

Cold spell occuring from April 08 2021 to April 17 2021 at 87.0°N 276.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland

Duration: 10 days

Time span: April 08 2021 to April 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: -25.4 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: -27.0 °C

Event center: 87.0°N 276.5°E

Area affected: 565543 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-Apr-08_to_2021-Apr-17_276.5_87.0