Category: Extremes affecting United States

Heat wave occuring from October 06 2023 to October 11 2023 at 29.5°N 249.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 6 days

Time span: October 06 2023 to October 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.1 °C
  • Mean temperature: 27.1 °C
  • Maximum temperature anomaly: 7.2 °C
  • Maximum temperature: 32.5 °C

Event center: 29.5°N 249.5°E

Area affected: 116257 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-Oct-06_to_2023-Oct-11_249.5_29.5

Heat wave occuring from September 27 2023 to October 02 2023 at 40.0°N 255.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 6 days

Time span: September 27 2023 to October 02 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 15.4 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 23.0 °C

Event center: 40.0°N 255.0°E

Area affected: 92750 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-Sep-27_to_2023-Oct-02_255.0_40.0

Cold spell occuring from September 27 2023 to October 03 2023 at 31.0°N 244.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 7 days

Time span: September 27 2023 to October 03 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 19.8 °C
  • Minimum temperature anomaly: -8.6 °C
  • Minimum temperature: 9.5 °C

Event center: 31.0°N 244.0°E

Area affected: 276913 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-Sep-27_to_2023-Oct-03_244.0_31.0

Heat wave occuring from September 19 2023 to September 25 2023 at 48.5°N 269.0°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: September 19 2023 to September 25 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: 19.6 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: 23.1 °C

Event center: 48.5°N 269.0°E

Area affected: 140068 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-Sep-19_to_2023-Sep-25_269.0_48.5

Heat wave occuring from September 08 2023 to September 12 2023 at 56.0°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: 5 days

Time span: September 08 2023 to September 12 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 12.1 °C
  • Maximum temperature anomaly: 4.4 °C
  • Maximum temperature: 15.8 °C

Event center: 56.0°N 226.5°E

Area affected: 62965 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-Sep-08_to_2023-Sep-12_226.5_56.0

Heat wave occuring from September 07 2023 to September 14 2023 at 27.5°N 239.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 8 days

Time span: September 07 2023 to September 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 3.4 °C
  • Maximum temperature: 26.3 °C

Event center: 27.5°N 239.0°E

Area affected: 898100 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-Sep-07_to_2023-Sep-14_239.0_27.5

Cold spell occuring from September 07 2023 to September 11 2023 at 59.0°N 198.5°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: September 07 2023 to September 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -2.4 °C
  • Mean temperature: 7.5 °C
  • Minimum temperature anomaly: -3.2 °C
  • Minimum temperature: 6.1 °C

Event center: 59.0°N 198.5°E

Area affected: 85616 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-Sep-07_to_2023-Sep-11_198.5_59.0

Cold spell occuring from September 06 2023 to September 14 2023 at 58.0°N 205.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 9 days

Time span: September 06 2023 to September 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -1.9 °C
  • Mean temperature: 8.8 °C
  • Minimum temperature anomaly: -4.3 °C
  • Minimum temperature: 3.0 °C

Event center: 58.0°N 205.5°E

Area affected: 375966 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-Sep-06_to_2023-Sep-14_205.5_58.0

Cold spell occuring from September 01 2023 to September 06 2023 at 34.5°N 245.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 6 days

Time span: September 01 2023 to September 06 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: 19.7 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: 6.8 °C

Event center: 34.5°N 245.0°E

Area affected: 334520 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-Sep-01_to_2023-Sep-06_245.0_34.5

Cold spell occuring from August 19 2023 to August 25 2023 at 32.0°N 244.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 7 days

Time span: August 19 2023 to August 25 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.4 °C
  • Mean temperature: 22.3 °C
  • Minimum temperature anomaly: -13.0 °C
  • Minimum temperature: 8.6 °C

Event center: 32.0°N 244.5°E

Area affected: 757468 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-Aug-19_to_2023-Aug-25_244.5_32.0