Category: Extremes affecting United States

Heat wave occuring from August 07 2021 to August 17 2021 at 36.0°N 241.0°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: August 07 2021 to August 17 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 24.0 °C
  • Maximum temperature anomaly: 10.2 °C
  • Maximum temperature: 38.4 °C

Event center: 36.0°N 241.0°E

Area affected: 2132267 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-07_to_2021-Aug-17_241.0_36.0

Cold spell occuring from August 03 2021 to August 07 2021 at 31.5°N 277.5°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: August 03 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 24.0 °C
  • Minimum temperature anomaly: -5.2 °C
  • Minimum temperature: 21.0 °C

Event center: 31.5°N 277.5°E

Area affected: 129275 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_2021-Aug-03_to_2021-Aug-07_277.5_31.5

Cold spell occuring from August 01 2021 to August 07 2021 at 27.5°N 259.5°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 01 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 23.9 °C
  • Minimum temperature anomaly: -6.3 °C
  • Minimum temperature: 15.6 °C

Event center: 27.5°N 259.5°E

Area affected: 669614 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_2021-Aug-01_to_2021-Aug-07_259.5_27.5

Heat wave occuring from July 31 2021 to August 04 2021 at 25.0°N 262.5°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: July 31 2021 to August 04 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 29.0 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 30.1 °C

Event center: 25.0°N 262.5°E

Area affected: 100674 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-Jul-31_to_2021-Aug-04_262.5_25.0

Cold spell occuring from July 31 2021 to August 03 2021 at 39.5°N 271.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 4 days

Time span: July 31 2021 to August 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: 20.4 °C
  • Minimum temperature anomaly: -5.8 °C
  • Minimum temperature: 18.4 °C

Event center: 39.5°N 271.0°E

Area affected: 76629 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_2021-Jul-31_to_2021-Aug-03_271.0_39.5

Cold spell occuring from July 30 2021 to August 02 2021 at 38.0°N 246.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 4 days

Time span: July 30 2021 to August 02 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 24.2 °C
  • Minimum temperature anomaly: -5.2 °C
  • Minimum temperature: 19.9 °C

Event center: 38.0°N 246.0°E

Area affected: 51772 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_2021-Jul-30_to_2021-Aug-02_246.0_38.0

Heat wave occuring from July 29 2021 to August 05 2021 at 44.5°N 237.5°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: July 29 2021 to August 05 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 5.1 °C
  • Mean temperature: 26.3 °C
  • Maximum temperature anomaly: 8.3 °C
  • Maximum temperature: 34.6 °C

Event center: 44.5°N 237.5°E

Area affected: 133162 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-Jul-29_to_2021-Aug-05_237.5_44.5

Heat wave occuring from July 28 2021 to August 07 2021 at 36.0°N 241.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 11 days

Time span: July 28 2021 to August 07 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.7 °C
  • Mean temperature: 33.1 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 40.6 °C

Event center: 36.0°N 241.0°E

Area affected: 345341 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-Jul-28_to_2021-Aug-07_241.0_36.0

Heat wave occuring from July 28 2021 to August 01 2021 at 33.5°N 270.5°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: July 28 2021 to August 01 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.9 °C
  • Mean temperature: 29.9 °C
  • Maximum temperature anomaly: 3.8 °C
  • Maximum temperature: 31.4 °C

Event center: 33.5°N 270.5°E

Area affected: 74399 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-Jul-28_to_2021-Aug-01_270.5_33.5

Heat wave occuring from July 27 2021 to August 10 2021 at 21.5°N 272.5°E

Download data: JSON

Event type: Heat wave

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

  • Bahamas
  • Mexico
  • United States

Duration: 15 days

Time span: July 27 2021 to August 10 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 29.1 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 30.3 °C

Event center: 21.5°N 272.5°E

Area affected: 659411 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-Jul-27_to_2021-Aug-10_272.5_21.5