Category: Extremes affecting Canada

Cold spell occuring from April 14 2026 to April 17 2026 at 58.0°N 281.0°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: April 14 2026 to April 17 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.4 °C
  • Mean temperature: -18.4 °C
  • Minimum temperature anomaly: -10.7 °C
  • Minimum temperature: -25.4 °C

Event center: 58.0°N 281.0°E

Area affected: 359998 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_2026-Apr-14_to_2026-Apr-17_281.0_58.0

Cold spell occuring from April 09 2026 to April 14 2026 at 64.0°N 261.0°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 09 2026 to April 14 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -9.3 °C
  • Mean temperature: -25.6 °C
  • Minimum temperature anomaly: -12.5 °C
  • Minimum temperature: -28.9 °C

Event center: 64.0°N 261.0°E

Area affected: 74894 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_2026-Apr-09_to_2026-Apr-14_261.0_64.0

Heat wave occuring from April 09 2026 to April 13 2026 at 49.5°N 234.5°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 09 2026 to April 13 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 3.9 °C
  • Mean temperature: 6.7 °C
  • Maximum temperature anomaly: 5.8 °C
  • Maximum temperature: 11.7 °C

Event center: 49.5°N 234.5°E

Area affected: 50816 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_2026-Apr-09_to_2026-Apr-13_234.5_49.5

Heat wave occuring from April 09 2026 to April 13 2026 at 50.5°N 238.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 5 days

Time span: April 09 2026 to April 13 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 4.6 °C
  • Mean temperature: 7.5 °C
  • Maximum temperature anomaly: 7.0 °C
  • Maximum temperature: 11.6 °C

Event center: 50.5°N 238.5°E

Area affected: 110848 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_2026-Apr-09_to_2026-Apr-13_238.5_50.5

Cold spell occuring from April 07 2026 to April 13 2026 at 64.5°N 277.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 7 days

Time span: April 07 2026 to April 13 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.4 °C
  • Mean temperature: -26.3 °C
  • Minimum temperature anomaly: -11.4 °C
  • Minimum temperature: -32.1 °C

Event center: 64.5°N 277.0°E

Area affected: 69407 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_2026-Apr-07_to_2026-Apr-13_277.0_64.5

Cold spell occuring from April 07 2026 to April 09 2026 at 55.0°N 294.5°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: April 07 2026 to April 09 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -8.6 °C
  • Mean temperature: -16.0 °C
  • Minimum temperature anomaly: -11.3 °C
  • Minimum temperature: -24.5 °C

Event center: 55.0°N 294.5°E

Area affected: 242254 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_2026-Apr-07_to_2026-Apr-09_294.5_55.0

Cold spell occuring from April 06 2026 to April 12 2026 at 58.0°N 281.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 7 days

Time span: April 06 2026 to April 12 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: -18.8 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: -21.6 °C

Event center: 58.0°N 281.5°E

Area affected: 214400 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_2026-Apr-06_to_2026-Apr-12_281.5_58.0

Heat wave occuring from April 04 2026 to April 07 2026 at 49.5°N 241.5°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: April 04 2026 to April 07 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 8.4 °C
  • Maximum temperature anomaly: 9.0 °C
  • Maximum temperature: 14.3 °C

Event center: 49.5°N 241.5°E

Area affected: 120426 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_2026-Apr-04_to_2026-Apr-07_241.5_49.5

Heat wave occuring from March 03 2026 to March 10 2026 at 44.5°N 270.5°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 03 2026 to March 10 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 8.7 °C
  • Mean temperature: 4.1 °C
  • Maximum temperature anomaly: 15.4 °C
  • Maximum temperature: 13.7 °C

Event center: 44.5°N 270.5°E

Area affected: 391824 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_2026-Mar-03_to_2026-Mar-10_270.5_44.5

Cold spell occuring from February 24 2026 to April 17 2026 at 59.5°N 205.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland
  • United States

Duration: 53 days

Time span: February 24 2026 to April 17 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -8.6 °C
  • Mean temperature: -18.6 °C
  • Minimum temperature anomaly: -24.8 °C
  • Minimum temperature: -50.8 °C

Event center: 59.5°N 205.0°E

Area affected: 21077827 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_2026-Feb-24_to_2026-Apr-17_205.0_59.5