Category: Extremes affecting United States

Heat wave occuring from January 29 2021 to January 31 2021 at 53.0°N 177.0°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: January 29 2021 to January 31 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: 4.1 °C
  • Maximum temperature anomaly: 4.7 °C
  • Maximum temperature: 5.4 °C

Event center: 53.0°N 177.0°E

Area affected: 88694 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-29_to_2021-Jan-31_177.0_53.0

Cold spell occuring from January 27 2021 to March 14 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):

  • Canada
  • Mexico
  • United States

Duration: 47 days

Time span: January 27 2021 to March 14 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -11.8 °C
  • Mean temperature: -17.4 °C
  • Minimum temperature anomaly: -29.7 °C
  • Minimum temperature: -48.8 °C

Event center: 15.0°N 263.5°E

Area affected: 16574597 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-27_to_2021-Mar-14_263.5_15.0

Cold spell occuring from January 26 2021 to January 28 2021 at 40.0°N 257.5°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: January 26 2021 to January 28 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -8.9 °C
  • Mean temperature: -9.2 °C
  • Minimum temperature anomaly: -11.5 °C
  • Minimum temperature: -11.4 °C

Event center: 40.0°N 257.5°E

Area affected: 54733 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-26_to_2021-Jan-28_257.5_40.0

Cold spell occuring from January 23 2021 to January 29 2021 at 26.0°N 250.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 7 days

Time span: January 23 2021 to January 29 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -3.5 °C
  • Mean temperature: 11.9 °C
  • Minimum temperature anomaly: -12.6 °C
  • Minimum temperature: -13.3 °C

Event center: 26.0°N 250.5°E

Area affected: 1216941 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-23_to_2021-Jan-29_250.5_26.0

Cold spell occuring from January 22 2021 to January 27 2021 at 48.0°N 246.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 6 days

Time span: January 22 2021 to January 27 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -6.9 °C
  • Mean temperature: -13.9 °C
  • Minimum temperature anomaly: -10.1 °C
  • Minimum temperature: -16.8 °C

Event center: 48.0°N 246.5°E

Area affected: 75514 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-22_to_2021-Jan-27_246.5_48.0

Cold spell occuring from January 22 2021 to January 25 2021 at 50.0°N 244.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 4 days

Time span: January 22 2021 to January 25 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -8.1 °C
  • Mean temperature: -15.7 °C
  • Minimum temperature anomaly: -12.3 °C
  • Minimum temperature: -22.8 °C

Event center: 50.0°N 244.0°E

Area affected: 67275 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-22_to_2021-Jan-25_244.0_50.0

Heat wave occuring from January 21 2021 to February 02 2021 at 26.5°N 198.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 13 days

Time span: January 21 2021 to February 02 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 21.2 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 24.6 °C

Event center: 26.5°N 198.0°E

Area affected: 2781145 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-21_to_2021-Feb-02_198.0_26.5

Heat wave occuring from January 20 2021 to January 26 2021 at 71.5°N 199.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 7 days

Time span: January 20 2021 to January 26 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 13.4 °C
  • Mean temperature: -5.2 °C
  • Maximum temperature anomaly: 24.6 °C
  • Maximum temperature: 5.4 °C

Event center: 71.5°N 199.5°E

Area affected: 669955 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-20_to_2021-Jan-26_199.5_71.5

Heat wave occuring from January 12 2021 to January 20 2021 at 38.5°N 238.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 9 days

Time span: January 12 2021 to January 20 2021

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 13.4 °C
  • Maximum temperature anomaly: 10.4 °C
  • Maximum temperature: 22.8 °C

Event center: 38.5°N 238.0°E

Area affected: 664766 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-12_to_2021-Jan-20_238.0_38.5

Cold spell occuring from January 11 2021 to January 13 2021 at 26.0°N 263.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 3 days

Time span: January 11 2021 to January 13 2021

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: 11.2 °C
  • Minimum temperature anomaly: -10.0 °C
  • Minimum temperature: 4.2 °C

Event center: 26.0°N 263.0°E

Area affected: 280227 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-11_to_2021-Jan-13_263.0_26.0