Category: Extremes affecting United States

Cold spell occuring from October 02 2020 to October 04 2020 at 47.5°N 270.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 3 days

Time span: October 02 2020 to October 04 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -6.1 °C
  • Mean temperature: 4.5 °C
  • Minimum temperature anomaly: -7.1 °C
  • Minimum temperature: 1.4 °C

Event center: 47.5°N 270.0°E

Area affected: 75175 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-Oct-02_to_2020-Oct-04_270.0_47.5

Cold spell occuring from September 30 2020 to October 05 2020 at 24.5°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: 6 days

Time span: September 30 2020 to October 05 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -3.7 °C
  • Mean temperature: 18.2 °C
  • Minimum temperature anomaly: -6.1 °C
  • Minimum temperature: 10.4 °C

Event center: 24.5°N 259.5°E

Area affected: 133038 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-Sep-30_to_2020-Oct-05_259.5_24.5

Heat wave occuring from September 22 2020 to October 09 2020 at 45.5°N 309.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 18 days

Time span: September 22 2020 to October 09 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 4.4 °C
  • Mean temperature: 19.2 °C
  • Maximum temperature anomaly: 12.9 °C
  • Maximum temperature: 26.1 °C

Event center: 45.5°N 309.0°E

Area affected: 4529154 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-Sep-22_to_2020-Oct-09_309.0_45.5

Cold spell occuring from September 22 2020 to September 30 2020 at 51.5°N 178.0°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 22 2020 to September 30 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -1.5 °C
  • Mean temperature: 7.6 °C
  • Minimum temperature anomaly: -2.2 °C
  • Minimum temperature: 5.9 °C

Event center: 51.5°N 178.0°E

Area affected: 219612 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-Sep-22_to_2020-Sep-30_178.0_51.5

Heat wave occuring from September 20 2020 to September 23 2020 at 46.5°N 258.5°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 20 2020 to September 23 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 6.1 °C
  • Mean temperature: 18.7 °C
  • Maximum temperature anomaly: 7.5 °C
  • Maximum temperature: 20.2 °C

Event center: 46.5°N 258.5°E

Area affected: 54091 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-Sep-20_to_2020-Sep-23_258.5_46.5

Cold spell occuring from September 06 2020 to September 24 2020 at 37.5°N 254.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 19 days

Time span: September 06 2020 to September 24 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -7.1 °C
  • Mean temperature: 10.4 °C
  • Minimum temperature anomaly: -19.6 °C
  • Minimum temperature: -8.0 °C

Event center: 37.5°N 254.0°E

Area affected: 7511009 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-Sep-06_to_2020-Sep-24_254.0_37.5

Heat wave occuring from September 04 2020 to September 07 2020 at 48.5°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: 4 days

Time span: September 04 2020 to September 07 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 6.4 °C
  • Mean temperature: 22.6 °C
  • Maximum temperature anomaly: 9.4 °C
  • Maximum temperature: 26.9 °C

Event center: 48.5°N 241.0°E

Area affected: 55400 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-Sep-04_to_2020-Sep-07_241.0_48.5

Cold spell occuring from September 02 2020 to September 05 2020 at 61.0°N 201.5°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: September 02 2020 to September 05 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -3.0 °C
  • Mean temperature: 6.6 °C
  • Minimum temperature anomaly: -4.0 °C
  • Minimum temperature: 2.4 °C

Event center: 61.0°N 201.5°E

Area affected: 187017 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-Sep-02_to_2020-Sep-05_201.5_61.0

Cold spell occuring from August 27 2020 to September 06 2020 at 38.0°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: 11 days

Time span: August 27 2020 to September 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -2.4 °C
  • Mean temperature: 12.4 °C
  • Minimum temperature anomaly: -3.6 °C
  • Minimum temperature: 10.6 °C

Event center: 38.0°N 237.0°E

Area affected: 67315 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-Aug-27_to_2020-Sep-06_237.0_38.0

Heat wave occuring from August 21 2020 to August 25 2020 at 41.5°N 282.5°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: August 21 2020 to August 25 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 24.3 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 26.7 °C

Event center: 41.5°N 282.5°E

Area affected: 122830 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-Aug-21_to_2020-Aug-25_282.5_41.5