Category: Extremes affecting Canada

Cold spell occuring from March 25 2023 to April 11 2023 at 73.0°N 284.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland

Duration: 18 days

Time span: March 25 2023 to April 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: -26.0 °C
  • Minimum temperature anomaly: -11.7 °C
  • Minimum temperature: -38.9 °C

Event center: 73.0°N 284.5°E

Area affected: 176607 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-Mar-25_to_2023-Apr-11_284.5_73.0

Heat wave occuring from March 24 2023 to March 29 2023 at 55.5°N 304.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 6 days

Time span: March 24 2023 to March 29 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 1.5 °C
  • Maximum temperature anomaly: 5.9 °C
  • Maximum temperature: 3.8 °C

Event center: 55.5°N 304.0°E

Area affected: 120039 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-Mar-24_to_2023-Mar-29_304.0_55.5

Heat wave occuring from March 16 2023 to March 23 2023 at 58.0°N 226.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 8 days

Time span: March 16 2023 to March 23 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.4 °C
  • Mean temperature: 0.4 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: 6.2 °C

Event center: 58.0°N 226.5°E

Area affected: 207949 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-Mar-16_to_2023-Mar-23_226.5_58.0

Cold spell occuring from March 16 2023 to April 01 2023 at 48.5°N 252.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 17 days

Time span: March 16 2023 to April 01 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -7.0 °C
  • Mean temperature: 0.8 °C
  • Minimum temperature anomaly: -18.5 °C
  • Minimum temperature: -28.1 °C

Event center: 48.5°N 252.5°E

Area affected: 10959071 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-Mar-16_to_2023-Apr-01_252.5_48.5

Cold spell occuring from March 06 2023 to March 10 2023 at 55.0°N 225.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 5 days

Time span: March 06 2023 to March 10 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 0.0 °C
  • Minimum temperature anomaly: -8.4 °C
  • Minimum temperature: -8.2 °C

Event center: 55.0°N 225.0°E

Area affected: 109861 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-Mar-06_to_2023-Mar-10_225.0_55.0

Cold spell occuring from March 05 2023 to March 13 2023 at 48.0°N 245.5°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: March 05 2023 to March 13 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -9.2 °C
  • Mean temperature: -12.7 °C
  • Minimum temperature anomaly: -15.7 °C
  • Minimum temperature: -20.8 °C

Event center: 48.0°N 245.5°E

Area affected: 180198 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-Mar-05_to_2023-Mar-13_245.5_48.0

Cold spell occuring from March 05 2023 to March 09 2023 at 62.5°N 229.5°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: March 05 2023 to March 09 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -11.1 °C
  • Mean temperature: -26.9 °C
  • Minimum temperature anomaly: -17.4 °C
  • Minimum temperature: -37.0 °C

Event center: 62.5°N 229.5°E

Area affected: 214525 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-Mar-05_to_2023-Mar-09_229.5_62.5

Heat wave occuring from March 04 2023 to March 07 2023 at 48.5°N 272.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 4 days

Time span: March 04 2023 to March 07 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 8.2 °C
  • Mean temperature: -0.1 °C
  • Maximum temperature anomaly: 9.4 °C
  • Maximum temperature: 0.6 °C

Event center: 48.5°N 272.5°E

Area affected: 56162 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-Mar-04_to_2023-Mar-07_272.5_48.5

Heat wave occuring from February 26 2023 to March 01 2023 at 86.5°N 339.0°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: February 26 2023 to March 01 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 8.8 °C
  • Mean temperature: -17.0 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: -12.9 °C

Event center: 86.5°N 339.0°E

Area affected: 102956 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-Feb-26_to_2023-Mar-01_339.0_86.5

Heat wave occuring from February 13 2023 to March 15 2023 at 42.5°N 197.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 31 days

Time span: February 13 2023 to March 15 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.9 °C
  • Mean temperature: 9.7 °C
  • Maximum temperature anomaly: 23.6 °C
  • Maximum temperature: 25.8 °C

Event center: 42.5°N 197.0°E

Area affected: 11621576 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-Feb-13_to_2023-Mar-15_197.0_42.5