Category: Extremes affecting United States

Heat wave occuring from July 14 2020 to July 24 2020 at 58.0°N 203.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 11 days

Time span: July 14 2020 to July 24 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 15.9 °C
  • Maximum temperature anomaly: 5.5 °C
  • Maximum temperature: 18.5 °C

Event center: 58.0°N 203.0°E

Area affected: 90522 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-Jul-14_to_2020-Jul-24_203.0_58.0

Cold spell occuring from July 10 2020 to July 12 2020 at 66.0°N 220.0°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: July 10 2020 to July 12 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -5.6 °C
  • Mean temperature: 8.1 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: 3.2 °C

Event center: 66.0°N 220.0°E

Area affected: 85980 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-Jul-10_to_2020-Jul-12_220.0_66.0

Cold spell occuring from July 09 2020 to July 23 2020 at 70.5°N 208.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 15 days

Time span: July 09 2020 to July 23 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 1.8 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: -0.7 °C

Event center: 70.5°N 208.0°E

Area affected: 160865 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-Jul-09_to_2020-Jul-23_208.0_70.5

Heat wave occuring from July 09 2020 to July 15 2020 at 30.0°N 267.5°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: July 09 2020 to July 15 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 30.2 °C
  • Maximum temperature anomaly: 3.6 °C
  • Maximum temperature: 31.3 °C

Event center: 30.0°N 267.5°E

Area affected: 135389 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-Jul-09_to_2020-Jul-15_267.5_30.0

Heat wave occuring from July 02 2020 to July 04 2020 at 60.0°N 215.0°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: July 02 2020 to July 04 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 14.9 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 18.2 °C

Event center: 60.0°N 215.0°E

Area affected: 69684 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-Jul-02_to_2020-Jul-04_215.0_60.0

Heat wave occuring from June 29 2020 to July 03 2020 at 34.0°N 258.0°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: June 29 2020 to July 03 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 4.0 °C
  • Mean temperature: 31.3 °C
  • Maximum temperature anomaly: 4.7 °C
  • Maximum temperature: 32.7 °C

Event center: 34.0°N 258.0°E

Area affected: 52205 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-Jun-29_to_2020-Jul-03_258.0_34.0

Cold spell occuring from June 29 2020 to July 03 2020 at 65.0°N 221.5°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: June 29 2020 to July 03 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -5.0 °C
  • Mean temperature: 10.1 °C
  • Minimum temperature anomaly: -7.2 °C
  • Minimum temperature: 2.3 °C

Event center: 65.0°N 221.5°E

Area affected: 281313 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-Jun-29_to_2020-Jul-03_221.5_65.0

Cold spell occuring from June 28 2020 to July 02 2020 at 30.0°N 245.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 5 days

Time span: June 28 2020 to July 02 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 25.8 °C
  • Minimum temperature anomaly: -8.7 °C
  • Minimum temperature: 16.0 °C

Event center: 30.0°N 245.5°E

Area affected: 157566 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-Jun-28_to_2020-Jul-02_245.5_30.0

Cold spell occuring from June 28 2020 to July 02 2020 at 43.5°N 247.5°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: June 28 2020 to July 02 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -8.0 °C
  • Mean temperature: 10.1 °C
  • Minimum temperature anomaly: -13.9 °C
  • Minimum temperature: 0.7 °C

Event center: 43.5°N 247.5°E

Area affected: 489165 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-Jun-28_to_2020-Jul-02_247.5_43.5

Cold spell occuring from June 23 2020 to June 26 2020 at 67.5°N 201.0°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: June 23 2020 to June 26 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -5.8 °C
  • Mean temperature: 7.5 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: 3.4 °C

Event center: 67.5°N 201.0°E

Area affected: 97629 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-Jun-23_to_2020-Jun-26_201.0_67.5