Category: Extremes affecting United States

Cold spell occuring from June 22 2021 to July 04 2021 at 17.5°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: 13 days

Time span: June 22 2021 to July 04 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 20.2 °C
  • Minimum temperature anomaly: -10.6 °C
  • Minimum temperature: 4.7 °C

Event center: 17.5°N 259.5°E

Area affected: 1748986 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-Jun-22_to_2021-Jul-04_259.5_17.5

Heat wave occuring from June 17 2021 to July 05 2021 at 56.0°N 192.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 19 days

Time span: June 17 2021 to July 05 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 8.9 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 13.9 °C

Event center: 56.0°N 192.5°E

Area affected: 428666 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-Jun-17_to_2021-Jul-05_192.5_56.0

Heat wave occuring from June 14 2021 to June 20 2021 at 67.5°N 220.0°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: June 14 2021 to June 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 17.1 °C
  • Maximum temperature anomaly: 10.7 °C
  • Maximum temperature: 24.2 °C

Event center: 67.5°N 220.0°E

Area affected: 225959 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-Jun-14_to_2021-Jun-20_220.0_67.5

Heat wave occuring from June 12 2021 to June 15 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: 4 days

Time span: June 12 2021 to June 15 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 28.9 °C
  • Maximum temperature anomaly: 4.2 °C
  • Maximum temperature: 29.8 °C

Event center: 33.5°N 270.5°E

Area affected: 50926 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-Jun-12_to_2021-Jun-15_270.5_33.5

Cold spell occuring from June 08 2021 to June 11 2021 at 39.5°N 237.0°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: June 08 2021 to June 11 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 12.2 °C
  • Minimum temperature anomaly: -7.7 °C
  • Minimum temperature: 7.5 °C

Event center: 39.5°N 237.0°E

Area affected: 69504 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-Jun-08_to_2021-Jun-11_237.0_39.5

Heat wave occuring from June 04 2021 to September 27 2021 at 76.0°N 151.5°E

Download data: JSON

Event type: Heat wave

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

  • Azerbaijan
  • China
  • Finland
  • Japan
  • Kazakhstan
  • Korea, Democratic People’s Republic of
  • Korea, Republic of
  • Northern Mariana Islands
  • Norway
  • Russian Federation
  • Svalbard and Jan Mayen
  • Turkmenistan
  • Ukraine
  • United States
  • Uzbekistan

Duration: 116 days

Time span: June 04 2021 to September 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 19.1 °C
  • Maximum temperature anomaly: 19.5 °C
  • Maximum temperature: 34.2 °C

Event center: 76.0°N 151.5°E

Area affected: 39762494 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-Jun-04_to_2021-Sep-27_151.5_76.0

Cold spell occuring from June 03 2021 to June 09 2021 at 62.0°N 199.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 7 days

Time span: June 03 2021 to June 09 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.8 °C
  • Mean temperature: 6.1 °C
  • Minimum temperature anomaly: -7.2 °C
  • Minimum temperature: 1.9 °C

Event center: 62.0°N 199.0°E

Area affected: 123734 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-Jun-03_to_2021-Jun-09_199.0_62.0

Heat wave occuring from June 01 2021 to June 22 2021 at 53.5°N 176.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation
  • United States

Duration: 22 days

Time span: June 01 2021 to June 22 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 6.9 °C
  • Maximum temperature anomaly: 8.0 °C
  • Maximum temperature: 14.3 °C

Event center: 53.5°N 176.0°E

Area affected: 1194358 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-Jun-01_to_2021-Jun-22_176.0_53.5

Cold spell occuring from June 01 2021 to June 20 2021 at 64.5°N 190.0°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation
  • United States

Duration: 20 days

Time span: June 01 2021 to June 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: -0.5 °C
  • Minimum temperature anomaly: -5.9 °C
  • Minimum temperature: -3.2 °C

Event center: 64.5°N 190.0°E

Area affected: 266558 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-Jun-01_to_2021-Jun-20_190.0_64.5

Heat wave occuring from June 01 2021 to August 09 2021 at 40.5°N 218.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 70 days

Time span: June 01 2021 to August 09 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.1 °C
  • Mean temperature: 20.2 °C
  • Maximum temperature anomaly: 12.1 °C
  • Maximum temperature: 33.7 °C

Event center: 40.5°N 218.5°E

Area affected: 15500380 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-Jun-01_to_2021-Aug-09_218.5_40.5