Category: Extremes affecting United States

Heat wave occuring from May 17 2020 to May 20 2020 at 37.5°N 254.0°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: May 17 2020 to May 20 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 13.8 °C
  • Maximum temperature anomaly: 7.9 °C
  • Maximum temperature: 21.7 °C

Event center: 37.5°N 254.0°E

Area affected: 110422 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-May-17_to_2020-May-20_254.0_37.5

Cold spell occuring from May 13 2020 to May 21 2020 at 65.5°N 234.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 9 days

Time span: May 13 2020 to May 21 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -7.8 °C
  • Mean temperature: -3.0 °C
  • Minimum temperature anomaly: -13.2 °C
  • Minimum temperature: -10.1 °C

Event center: 65.5°N 234.0°E

Area affected: 576364 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-May-13_to_2020-May-21_234.0_65.5

Heat wave occuring from May 04 2020 to June 06 2020 at 50.5°N 201.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • China
  • Greenland
  • Kazakhstan
  • Mongolia
  • Russian Federation
  • Svalbard and Jan Mayen
  • United States

Duration: 34 days

Time span: May 04 2020 to June 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 3.1 °C
  • Maximum temperature anomaly: 21.5 °C
  • Maximum temperature: 26.2 °C

Event center: 50.5°N 201.5°E

Area affected: 21296845 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-May-04_to_2020-Jun-06_201.5_50.5

Cold spell occuring from May 03 2020 to May 14 2020 at 45.0°N 278.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 12 days

Time span: May 03 2020 to May 14 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -7.6 °C
  • Mean temperature: 4.5 °C
  • Minimum temperature anomaly: -14.8 °C
  • Minimum temperature: -9.6 °C

Event center: 45.0°N 278.0°E

Area affected: 5957499 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-May-03_to_2020-May-14_278.0_45.0

Heat wave occuring from April 30 2020 to May 13 2020 at 43.0°N 170.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 14 days

Time span: April 30 2020 to May 13 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 11.3 °C
  • Maximum temperature anomaly: 6.3 °C
  • Maximum temperature: 23.5 °C

Event center: 43.0°N 170.5°E

Area affected: 3016333 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-Apr-30_to_2020-May-13_170.5_43.0

Cold spell occuring from April 23 2020 to April 27 2020 at 64.5°N 231.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 5 days

Time span: April 23 2020 to April 27 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -9.7 °C
  • Mean temperature: -15.9 °C
  • Minimum temperature anomaly: -15.6 °C
  • Minimum temperature: -26.4 °C

Event center: 64.5°N 231.5°E

Area affected: 1081575 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-Apr-23_to_2020-Apr-27_231.5_64.5

Heat wave occuring from April 22 2020 to May 11 2020 at 33.0°N 244.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 20 days

Time span: April 22 2020 to May 11 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 24.0 °C
  • Maximum temperature anomaly: 12.3 °C
  • Maximum temperature: 34.2 °C

Event center: 33.0°N 244.5°E

Area affected: 2716134 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-Apr-22_to_2020-May-11_244.5_33.0

Cold spell occuring from April 17 2020 to April 26 2020 at 57.0°N 276.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 10 days

Time span: April 17 2020 to April 26 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -8.3 °C
  • Mean temperature: -12.9 °C
  • Minimum temperature anomaly: -14.2 °C
  • Minimum temperature: -27.8 °C

Event center: 57.0°N 276.5°E

Area affected: 3691678 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-Apr-17_to_2020-Apr-26_276.5_57.0

Cold spell occuring from April 16 2020 to April 21 2020 at 48.0°N 294.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 6 days

Time span: April 16 2020 to April 21 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -5.0 °C
  • Mean temperature: -2.2 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: -6.9 °C

Event center: 48.0°N 294.5°E

Area affected: 130304 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-Apr-16_to_2020-Apr-21_294.5_48.0

Cold spell occuring from April 11 2020 to April 20 2020 at 43.5°N 251.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 10 days

Time span: April 11 2020 to April 20 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -9.4 °C
  • Mean temperature: -3.4 °C
  • Minimum temperature anomaly: -17.1 °C
  • Minimum temperature: -18.3 °C

Event center: 43.5°N 251.5°E

Area affected: 5686934 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-Apr-11_to_2020-Apr-20_251.5_43.5