Category: Extremes affecting Canada

Heat wave occuring from August 14 2023 to August 24 2023 at 73.5°N 209.0°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 14 2023 to August 24 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 4.5 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 13.6 °C

Event center: 73.5°N 209.0°E

Area affected: 375882 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-Aug-14_to_2023-Aug-24_209.0_73.5

Cold spell occuring from July 30 2023 to August 03 2023 at 51.0°N 296.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 5 days

Time span: July 30 2023 to August 03 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.8 °C
  • Mean temperature: 11.4 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: 9.4 °C

Event center: 51.0°N 296.0°E

Area affected: 61124 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-Jul-30_to_2023-Aug-03_296.0_51.0

Cold spell occuring from July 28 2023 to August 04 2023 at 47.5°N 287.5°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: July 28 2023 to August 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 14.3 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 8.0 °C

Event center: 47.5°N 287.5°E

Area affected: 838008 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-Jul-28_to_2023-Aug-04_287.5_47.5

Cold spell occuring from July 28 2023 to July 31 2023 at 56.5°N 293.0°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: July 28 2023 to July 31 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 8.0 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: 4.2 °C

Event center: 56.5°N 293.0°E

Area affected: 77793 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-Jul-28_to_2023-Jul-31_293.0_56.5

Cold spell occuring from July 27 2023 to August 07 2023 at 82.5°N 334.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland

Duration: 12 days

Time span: July 27 2023 to August 07 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.7 °C
  • Mean temperature: -2.9 °C
  • Minimum temperature anomaly: -12.5 °C
  • Minimum temperature: -11.3 °C

Event center: 82.5°N 334.0°E

Area affected: 231136 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-Jul-27_to_2023-Aug-07_334.0_82.5

Cold spell occuring from July 25 2023 to July 29 2023 at 54.0°N 246.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 5 days

Time span: July 25 2023 to July 29 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 12.4 °C
  • Minimum temperature anomaly: -6.2 °C
  • Minimum temperature: 9.1 °C

Event center: 54.0°N 246.0°E

Area affected: 103621 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-Jul-25_to_2023-Jul-29_246.0_54.0

Heat wave occuring from July 23 2023 to August 01 2023 at 75.5°N 245.0°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: July 23 2023 to August 01 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.9 °C
  • Mean temperature: 11.1 °C
  • Maximum temperature anomaly: 14.2 °C
  • Maximum temperature: 19.6 °C

Event center: 75.5°N 245.0°E

Area affected: 76265 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-Jul-23_to_2023-Aug-01_245.0_75.5

Cold spell occuring from July 15 2023 to July 17 2023 at 49.5°N 257.5°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: July 15 2023 to July 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: 14.7 °C
  • Minimum temperature anomaly: -5.8 °C
  • Minimum temperature: 13.0 °C

Event center: 49.5°N 257.5°E

Area affected: 86109 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-Jul-15_to_2023-Jul-17_257.5_49.5

Heat wave occuring from July 15 2023 to July 21 2023 at 62.5°N 268.0°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 15 2023 to July 21 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 17.0 °C
  • Maximum temperature anomaly: 8.3 °C
  • Maximum temperature: 20.7 °C

Event center: 62.5°N 268.0°E

Area affected: 122788 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-Jul-15_to_2023-Jul-21_268.0_62.5

Cold spell occuring from July 14 2023 to July 16 2023 at 84.0°N 227.5°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: July 14 2023 to July 16 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -0.6 °C
  • Mean temperature: 0.2 °C
  • Minimum temperature anomaly: -0.9 °C
  • Minimum temperature: -0.2 °C

Event center: 84.0°N 227.5°E

Area affected: 54061 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-Jul-14_to_2023-Jul-16_227.5_84.0