Category: Extremes affecting United States

Cold spell occuring from May 30 2021 to June 01 2021 at 33.0°N 279.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 3 days

Time span: May 30 2021 to June 01 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: 20.4 °C
  • Minimum temperature anomaly: -6.9 °C
  • Minimum temperature: 16.7 °C

Event center: 33.0°N 279.5°E

Area affected: 77617 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-May-30_to_2021-Jun-01_279.5_33.0

Heat wave occuring from May 29 2021 to July 20 2021 at 49.0°N 241.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Mexico
  • Portugal
  • United States

Duration: 53 days

Time span: May 29 2021 to July 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 5.1 °C
  • Mean temperature: 23.5 °C
  • Maximum temperature anomaly: 19.1 °C
  • Maximum temperature: 43.4 °C

Event center: 49.0°N 241.5°E

Area affected: 21062109 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-May-29_to_2021-Jul-20_241.5_49.0

Cold spell occuring from May 29 2021 to June 08 2021 at 32.0°N 241.5°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: May 29 2021 to June 08 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -1.6 °C
  • Mean temperature: 13.9 °C
  • Minimum temperature anomaly: -2.0 °C
  • Minimum temperature: 12.6 °C

Event center: 32.0°N 241.5°E

Area affected: 97872 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-May-29_to_2021-Jun-08_241.5_32.0

Cold spell occuring from May 27 2021 to May 31 2021 at 42.5°N 286.0°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: May 27 2021 to May 31 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -7.7 °C
  • Mean temperature: 9.3 °C
  • Minimum temperature anomaly: -11.4 °C
  • Minimum temperature: 4.7 °C

Event center: 42.5°N 286.0°E

Area affected: 419539 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-May-27_to_2021-May-31_286.0_42.5

Cold spell occuring from May 26 2021 to May 30 2021 at 68.5°N 212.5°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: May 26 2021 to May 30 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -8.6 °C
  • Mean temperature: -0.6 °C
  • Minimum temperature anomaly: -12.6 °C
  • Minimum temperature: -13.1 °C

Event center: 68.5°N 212.5°E

Area affected: 227269 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-May-26_to_2021-May-30_212.5_68.5

Cold spell occuring from May 26 2021 to June 05 2021 at 36.5°N 264.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 11 days

Time span: May 26 2021 to June 05 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 16.3 °C
  • Minimum temperature anomaly: -11.7 °C
  • Minimum temperature: 4.7 °C

Event center: 36.5°N 264.0°E

Area affected: 2511146 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-May-26_to_2021-Jun-05_264.0_36.5

Heat wave occuring from May 21 2021 to May 25 2021 at 44.5°N 265.5°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: May 21 2021 to May 25 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 6.4 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 8.5 °C
  • Maximum temperature: 25.0 °C

Event center: 44.5°N 265.5°E

Area affected: 179816 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-May-21_to_2021-May-25_265.5_44.5

Heat wave occuring from May 20 2021 to May 29 2021 at 35.5°N 275.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 10 days

Time span: May 20 2021 to May 29 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.9 °C
  • Mean temperature: 25.9 °C
  • Maximum temperature anomaly: 5.8 °C
  • Maximum temperature: 28.6 °C

Event center: 35.5°N 275.0°E

Area affected: 319066 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-May-20_to_2021-May-29_275.0_35.5

Cold spell occuring from May 15 2021 to May 24 2021 at 42.0°N 235.0°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: May 15 2021 to May 24 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 9.2 °C
  • Minimum temperature anomaly: -4.9 °C
  • Minimum temperature: 5.1 °C

Event center: 42.0°N 235.0°E

Area affected: 73323 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-May-15_to_2021-May-24_235.0_42.0

Heat wave occuring from May 14 2021 to May 19 2021 at 43.0°N 291.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 6 days

Time span: May 14 2021 to May 19 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 12.5 °C
  • Maximum temperature anomaly: 4.6 °C
  • Maximum temperature: 16.5 °C

Event center: 43.0°N 291.5°E

Area affected: 61269 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-May-14_to_2021-May-19_291.5_43.0