Category: Extremes affecting United States

Cold spell occuring from March 15 2021 to April 23 2021 at 71.0°N 221.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Russian Federation
  • United States

Duration: 40 days

Time span: March 15 2021 to April 23 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -8.2 °C
  • Mean temperature: -26.7 °C
  • Minimum temperature anomaly: -22.8 °C
  • Minimum temperature: -43.6 °C

Event center: 71.0°N 221.0°E

Area affected: 14898697 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-Mar-15_to_2021-Apr-23_221.0_71.0

Heat wave occuring from March 15 2021 to March 19 2021 at 29.5°N 280.0°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: March 15 2021 to March 19 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.5 °C
  • Mean temperature: 23.9 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 26.0 °C

Event center: 29.5°N 280.0°E

Area affected: 56610 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-Mar-15_to_2021-Mar-19_280.0_29.5

Heat wave occuring from March 13 2021 to March 16 2021 at 74.0°N 185.5°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation
  • United States

Duration: 4 days

Time span: March 13 2021 to March 16 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 8.7 °C
  • Mean temperature: -12.5 °C
  • Maximum temperature anomaly: 16.2 °C
  • Maximum temperature: -2.9 °C

Event center: 74.0°N 185.5°E

Area affected: 360269 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-Mar-13_to_2021-Mar-16_185.5_74.0

Cold spell occuring from March 11 2021 to March 13 2021 at 63.0°N 200.5°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: March 11 2021 to March 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -12.3 °C
  • Mean temperature: -23.9 °C
  • Minimum temperature anomaly: -16.5 °C
  • Minimum temperature: -31.0 °C

Event center: 63.0°N 200.5°E

Area affected: 88954 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-Mar-11_to_2021-Mar-13_200.5_63.0

Cold spell occuring from March 09 2021 to April 03 2021 at 23.5°N 253.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 26 days

Time span: March 09 2021 to April 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.4 °C
  • Mean temperature: 14.6 °C
  • Minimum temperature anomaly: -11.0 °C
  • Minimum temperature: -10.6 °C

Event center: 23.5°N 253.0°E

Area affected: 4450846 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-Mar-09_to_2021-Apr-03_253.0_23.5

Cold spell occuring from March 08 2021 to March 10 2021 at 53.5°N 174.5°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: March 08 2021 to March 10 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: -1.0 °C
  • Minimum temperature anomaly: -4.5 °C
  • Minimum temperature: -4.4 °C

Event center: 53.5°N 174.5°E

Area affected: 334866 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-Mar-08_to_2021-Mar-10_174.5_53.5

Heat wave occuring from March 02 2021 to March 14 2021 at 46.5°N 260.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Mexico
  • United States

Duration: 13 days

Time span: March 02 2021 to March 14 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 10.3 °C
  • Mean temperature: 7.6 °C
  • Maximum temperature anomaly: 17.3 °C
  • Maximum temperature: 23.7 °C

Event center: 46.5°N 260.0°E

Area affected: 2563488 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-Mar-02_to_2021-Mar-14_260.0_46.5

Heat wave occuring from February 25 2021 to March 03 2021 at 27.0°N 284.0°E

Download data: JSON

Event type: Heat wave

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

  • Bahamas
  • Cuba
  • Mexico
  • United States

Duration: 7 days

Time span: February 25 2021 to March 03 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 23.9 °C
  • Maximum temperature anomaly: 11.8 °C
  • Maximum temperature: 27.2 °C

Event center: 27.0°N 284.0°E

Area affected: 1714919 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-Feb-25_to_2021-Mar-03_284.0_27.0

Heat wave occuring from February 25 2021 to February 27 2021 at 48.5°N 199.0°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: February 25 2021 to February 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 5.5 °C
  • Maximum temperature anomaly: 3.8 °C
  • Maximum temperature: 7.8 °C

Event center: 48.5°N 199.0°E

Area affected: 345933 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-Feb-25_to_2021-Feb-27_199.0_48.5

Heat wave occuring from February 23 2021 to March 18 2021 at 19.5°N 258.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 24 days

Time span: February 23 2021 to March 18 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.9 °C
  • Mean temperature: 21.3 °C
  • Maximum temperature anomaly: 10.3 °C
  • Maximum temperature: 30.8 °C

Event center: 19.5°N 258.5°E

Area affected: 2359764 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-Feb-23_to_2021-Mar-18_258.5_19.5