Category: Extremes affecting Canada

Cold spell occuring from May 08 2023 to May 17 2023 at 79.0°N 287.0°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: May 08 2023 to May 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -7.3 °C
  • Mean temperature: -24.2 °C
  • Minimum temperature anomaly: -10.7 °C
  • Minimum temperature: -31.4 °C

Event center: 79.0°N 287.0°E

Area affected: 737912 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_2023-May-08_to_2023-May-17_287.0_79.0

Heat wave occuring from May 08 2023 to May 12 2023 at 61.0°N 283.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 5 days

Time span: May 08 2023 to May 12 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.7 °C
  • Mean temperature: 1.8 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: 4.2 °C

Event center: 61.0°N 283.5°E

Area affected: 51649 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_2023-May-08_to_2023-May-12_283.5_61.0

Cold spell occuring from May 05 2023 to June 04 2023 at 80.5°N 278.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland
  • Russian Federation

Duration: 31 days

Time span: May 05 2023 to June 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.4 °C
  • Mean temperature: -10.5 °C
  • Minimum temperature anomaly: -12.0 °C
  • Minimum temperature: -23.9 °C

Event center: 80.5°N 278.0°E

Area affected: 4523104 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_2023-May-05_to_2023-Jun-04_278.0_80.5

Cold spell occuring from May 01 2023 to May 04 2023 at 39.0°N 280.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 4 days

Time span: May 01 2023 to May 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -7.0 °C
  • Mean temperature: 6.5 °C
  • Minimum temperature anomaly: -9.9 °C
  • Minimum temperature: 2.1 °C

Event center: 39.0°N 280.0°E

Area affected: 431629 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_2023-May-01_to_2023-May-04_280.0_39.0

Heat wave occuring from May 01 2023 to May 04 2023 at 56.5°N 304.0°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: May 01 2023 to May 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 3.4 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 4.4 °C

Event center: 56.5°N 304.0°E

Area affected: 101341 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_2023-May-01_to_2023-May-04_304.0_56.5

Heat wave occuring from April 18 2023 to June 21 2023 at 52.0°N 242.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland
  • United States

Duration: 65 days

Time span: April 18 2023 to June 21 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 7.8 °C
  • Mean temperature: 7.8 °C
  • Maximum temperature anomaly: 21.3 °C
  • Maximum temperature: 32.6 °C

Event center: 52.0°N 242.5°E

Area affected: 15336797 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_2023-Apr-18_to_2023-Jun-21_242.5_52.0

Cold spell occuring from April 18 2023 to April 26 2023 at 49.0°N 255.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 9 days

Time span: April 18 2023 to April 26 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -7.2 °C
  • Mean temperature: 1.4 °C
  • Minimum temperature anomaly: -14.3 °C
  • Minimum temperature: -11.3 °C

Event center: 49.0°N 255.0°E

Area affected: 2962241 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_2023-Apr-18_to_2023-Apr-26_255.0_49.0

Heat wave occuring from April 16 2023 to April 21 2023 at 68.0°N 261.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 6 days

Time span: April 16 2023 to April 21 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.7 °C
  • Mean temperature: -9.3 °C
  • Maximum temperature anomaly: 11.7 °C
  • Maximum temperature: -3.5 °C

Event center: 68.0°N 261.5°E

Area affected: 242341 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_2023-Apr-16_to_2023-Apr-21_261.5_68.0

Heat wave occuring from April 12 2023 to April 16 2023 at 61.0°N 299.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 5 days

Time span: April 12 2023 to April 16 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 2.3 °C
  • Maximum temperature anomaly: 9.3 °C
  • Maximum temperature: 3.7 °C

Event center: 61.0°N 299.5°E

Area affected: 206774 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_2023-Apr-12_to_2023-Apr-16_299.5_61.0

Cold spell occuring from April 11 2023 to April 17 2023 at 42.0°N 234.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 7 days

Time span: April 11 2023 to April 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 7.6 °C
  • Minimum temperature anomaly: -3.6 °C
  • Minimum temperature: 2.3 °C

Event center: 42.0°N 234.5°E

Area affected: 496594 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_2023-Apr-11_to_2023-Apr-17_234.5_42.0