Category: Extremes affecting United States

Cold spell occuring from January 10 2021 to January 18 2021 at 46.5°N 194.5°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: January 10 2021 to January 18 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 1.8 °C
  • Minimum temperature anomaly: -4.9 °C
  • Minimum temperature: -2.7 °C

Event center: 46.5°N 194.5°E

Area affected: 1500753 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-Jan-10_to_2021-Jan-18_194.5_46.5

Heat wave occuring from January 09 2021 to January 13 2021 at 67.5°N 213.0°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: January 09 2021 to January 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 13.3 °C
  • Mean temperature: -13.2 °C
  • Maximum temperature anomaly: 18.2 °C
  • Maximum temperature: -8.1 °C

Event center: 67.5°N 213.0°E

Area affected: 77526 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-Jan-09_to_2021-Jan-13_213.0_67.5

Cold spell occuring from January 09 2021 to January 13 2021 at 24.5°N 256.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 5 days

Time span: January 09 2021 to January 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: 3.4 °C
  • Minimum temperature anomaly: -9.4 °C
  • Minimum temperature: -4.5 °C

Event center: 24.5°N 256.5°E

Area affected: 368329 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-Jan-09_to_2021-Jan-13_256.5_24.5

Heat wave occuring from January 06 2021 to January 13 2021 at 58.0°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: January 06 2021 to January 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 11.1 °C
  • Mean temperature: -3.8 °C
  • Maximum temperature anomaly: 19.1 °C
  • Maximum temperature: 6.3 °C

Event center: 58.0°N 224.0°E

Area affected: 259486 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-Jan-06_to_2021-Jan-13_224.0_58.0

Heat wave occuring from December 31 2020 to January 03 2021 at 47.0°N 246.0°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: December 31 2020 to January 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 7.3 °C
  • Mean temperature: 0.4 °C
  • Maximum temperature anomaly: 10.6 °C
  • Maximum temperature: 3.6 °C

Event center: 47.0°N 246.0°E

Area affected: 68067 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_2020-Dec-31_to_2021-Jan-03_246.0_47.0

Heat wave occuring from December 31 2020 to January 04 2021 at 27.5°N 284.5°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: December 31 2020 to January 04 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.6 °C
  • Mean temperature: 22.7 °C
  • Maximum temperature anomaly: 10.2 °C
  • Maximum temperature: 24.9 °C

Event center: 27.5°N 284.5°E

Area affected: 505529 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_2020-Dec-31_to_2021-Jan-04_284.5_27.5

Heat wave occuring from December 25 2020 to December 27 2020 at 40.5°N 257.5°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: December 25 2020 to December 27 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 7.2 °C
  • Mean temperature: 5.4 °C
  • Maximum temperature anomaly: 8.9 °C
  • Maximum temperature: 7.0 °C

Event center: 40.5°N 257.5°E

Area affected: 77851 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_2020-Dec-25_to_2020-Dec-27_257.5_40.5

Heat wave occuring from December 22 2020 to December 25 2020 at 63.5°N 204.0°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 22 2020 to December 25 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 13.3 °C
  • Mean temperature: -6.8 °C
  • Maximum temperature anomaly: 17.6 °C
  • Maximum temperature: 2.1 °C

Event center: 63.5°N 204.0°E

Area affected: 305883 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_2020-Dec-22_to_2020-Dec-25_204.0_63.5

Cold spell occuring from December 20 2020 to January 20 2021 at 15.0°N 263.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 32 days

Time span: December 20 2020 to January 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -3.1 °C
  • Mean temperature: 17.9 °C
  • Minimum temperature anomaly: -15.4 °C
  • Minimum temperature: -7.5 °C

Event center: 15.0°N 263.5°E

Area affected: 2367029 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_2020-Dec-20_to_2021-Jan-20_263.5_15.0

Heat wave occuring from December 18 2020 to December 23 2020 at 46.5°N 243.0°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 18 2020 to December 23 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 8.4 °C
  • Mean temperature: 4.1 °C
  • Maximum temperature anomaly: 13.1 °C
  • Maximum temperature: 12.9 °C

Event center: 46.5°N 243.0°E

Area affected: 1239083 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_2020-Dec-18_to_2020-Dec-23_243.0_46.5