Category: Extremes affecting United States

Cold spell occuring from January 03 2024 to January 22 2024 at 39.0°N 259.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 20 days

Time span: January 03 2024 to January 22 2024

Statistics over entire affected area:

  • Mean temperature anomaly: -14.7 °C
  • Mean temperature: -24.5 °C
  • Minimum temperature anomaly: -34.4 °C
  • Minimum temperature: -49.2 °C

Event center: 39.0°N 259.5°E

Area affected: 7268804 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_2024-Jan-03_to_2024-Jan-22_259.5_39.0

Cold spell occuring from December 27 2023 to December 31 2023 at 62.0°N 209.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 5 days

Time span: December 27 2023 to December 31 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -11.4 °C
  • Mean temperature: -24.3 °C
  • Minimum temperature anomaly: -19.2 °C
  • Minimum temperature: -33.8 °C

Event center: 62.0°N 209.5°E

Area affected: 76954 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-Dec-27_to_2023-Dec-31_209.5_62.0

Heat wave occuring from December 25 2023 to January 04 2024 at 50.5°N 234.5°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: December 25 2023 to January 04 2024

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 10.0 °C
  • Maximum temperature anomaly: 16.0 °C
  • Maximum temperature: 21.8 °C

Event center: 50.5°N 234.5°E

Area affected: 3703235 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-Dec-25_to_2024-Jan-04_234.5_50.5

Heat wave occuring from December 14 2023 to December 19 2023 at 46.5°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: 6 days

Time span: December 14 2023 to December 19 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 8.3 °C
  • Mean temperature: 3.9 °C
  • Maximum temperature anomaly: 14.2 °C
  • Maximum temperature: 10.3 °C

Event center: 46.5°N 272.5°E

Area affected: 836298 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-Dec-14_to_2023-Dec-19_272.5_46.5

Cold spell occuring from December 12 2023 to December 14 2023 at 54.0°N 207.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 3 days

Time span: December 12 2023 to December 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: -0.0 °C
  • Minimum temperature anomaly: -10.7 °C
  • Minimum temperature: -11.5 °C

Event center: 54.0°N 207.0°E

Area affected: 531317 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-Dec-12_to_2023-Dec-14_207.0_54.0

Heat wave occuring from December 12 2023 to December 18 2023 at 59.5°N 236.0°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: December 12 2023 to December 18 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 12.8 °C
  • Mean temperature: -2.9 °C
  • Maximum temperature anomaly: 21.5 °C
  • Maximum temperature: 5.5 °C

Event center: 59.5°N 236.0°E

Area affected: 400378 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-Dec-12_to_2023-Dec-18_236.0_59.5

Heat wave occuring from December 08 2023 to December 10 2023 at 43.5°N 278.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 3 days

Time span: December 08 2023 to December 10 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 7.5 °C
  • Mean temperature: 6.8 °C
  • Maximum temperature anomaly: 13.3 °C
  • Maximum temperature: 11.9 °C

Event center: 43.5°N 278.5°E

Area affected: 76358 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-Dec-08_to_2023-Dec-10_278.5_43.5

Heat wave occuring from December 04 2023 to December 07 2023 at 37.5°N 242.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 4 days

Time span: December 04 2023 to December 07 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 5.2 °C
  • Mean temperature: 11.0 °C
  • Maximum temperature anomaly: 8.5 °C
  • Maximum temperature: 16.9 °C

Event center: 37.5°N 242.5°E

Area affected: 104737 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-Dec-04_to_2023-Dec-07_242.5_37.5

Heat wave occuring from November 13 2023 to November 17 2023 at 40.5°N 247.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 5 days

Time span: November 13 2023 to November 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.6 °C
  • Mean temperature: 8.8 °C
  • Maximum temperature anomaly: 9.4 °C
  • Maximum temperature: 14.2 °C

Event center: 40.5°N 247.0°E

Area affected: 68818 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-Nov-13_to_2023-Nov-17_247.0_40.5

Heat wave occuring from November 13 2023 to November 16 2023 at 46.5°N 268.0°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: November 13 2023 to November 16 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 8.9 °C
  • Mean temperature: 9.8 °C
  • Maximum temperature anomaly: 12.5 °C
  • Maximum temperature: 13.7 °C

Event center: 46.5°N 268.0°E

Area affected: 220900 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-Nov-13_to_2023-Nov-16_268.0_46.5