Category: Extremes affecting United States

Heat wave occuring from September 13 2021 to September 17 2021 at 53.5°N 186.0°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: September 13 2021 to September 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 10.6 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 11.5 °C

Event center: 53.5°N 186.0°E

Area affected: 101964 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_2021-Sep-13_to_2021-Sep-17_186.0_53.5

Heat wave occuring from September 12 2021 to November 18 2021 at 57.5°N 278.5°E

Download data: JSON

Event type: Heat wave

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

  • Belize
  • Canada
  • Colombia
  • El Salvador
  • Greenland
  • Guatemala
  • Honduras
  • Mexico
  • Nicaragua
  • United States

Duration: 68 days

Time span: September 12 2021 to November 18 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 7.1 °C
  • Mean temperature: 2.7 °C
  • Maximum temperature anomaly: 20.3 °C
  • Maximum temperature: 32.0 °C

Event center: 57.5°N 278.5°E

Area affected: 24407429 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_2021-Sep-12_to_2021-Nov-18_278.5_57.5

Heat wave occuring from September 12 2021 to September 21 2021 at 40.5°N 289.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 10 days

Time span: September 12 2021 to September 21 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: 24.7 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 27.3 °C

Event center: 40.5°N 289.5°E

Area affected: 955062 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_2021-Sep-12_to_2021-Sep-21_289.5_40.5

Heat wave occuring from September 12 2021 to September 15 2021 at 41.0°N 276.0°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: September 12 2021 to September 15 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 6.1 °C
  • Mean temperature: 25.0 °C
  • Maximum temperature anomaly: 8.8 °C
  • Maximum temperature: 27.4 °C

Event center: 41.0°N 276.0°E

Area affected: 153499 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_2021-Sep-12_to_2021-Sep-15_276.0_41.0

Heat wave occuring from September 05 2021 to September 21 2021 at 37.5°N 253.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 17 days

Time span: September 05 2021 to September 21 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 24.6 °C
  • Maximum temperature anomaly: 10.2 °C
  • Maximum temperature: 37.0 °C

Event center: 37.5°N 253.5°E

Area affected: 2167615 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_2021-Sep-05_to_2021-Sep-21_253.5_37.5

Heat wave occuring from September 05 2021 to September 12 2021 at 25.0°N 281.5°E

Download data: JSON

Event type: Heat wave

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

  • Bahamas
  • United States

Duration: 8 days

Time span: September 05 2021 to September 12 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 28.7 °C
  • Maximum temperature anomaly: 2.0 °C
  • Maximum temperature: 29.9 °C

Event center: 25.0°N 281.5°E

Area affected: 183199 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_2021-Sep-05_to_2021-Sep-12_281.5_25.0

Heat wave occuring from September 01 2021 to September 03 2021 at 63.0°N 198.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 3 days

Time span: September 01 2021 to September 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 12.6 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 14.4 °C

Event center: 63.0°N 198.0°E

Area affected: 88085 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_2021-Sep-01_to_2021-Sep-03_198.0_63.0

Heat wave occuring from August 30 2021 to September 06 2021 at 65.5°N 224.0°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: August 30 2021 to September 06 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 11.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 17.4 °C

Event center: 65.5°N 224.0°E

Area affected: 1008914 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_2021-Aug-30_to_2021-Sep-06_224.0_65.5

Heat wave occuring from August 28 2021 to September 08 2021 at 26.5°N 263.0°E

Download data: JSON

Event type: Heat wave

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

  • Belize
  • Guatemala
  • Honduras
  • Mexico
  • United States

Duration: 12 days

Time span: August 28 2021 to September 08 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: 29.2 °C
  • Maximum temperature anomaly: 4.2 °C
  • Maximum temperature: 33.8 °C

Event center: 26.5°N 263.0°E

Area affected: 778708 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_2021-Aug-28_to_2021-Sep-08_263.0_26.5

Heat wave occuring from August 23 2021 to August 30 2021 at 25.5°N 249.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 8 days

Time span: August 23 2021 to August 30 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 32.7 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 39.3 °C

Event center: 25.5°N 249.0°E

Area affected: 278401 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_2021-Aug-23_to_2021-Aug-30_249.0_25.5