Category: Extremes affecting United States

Heat wave occuring from August 14 2020 to August 28 2020 at 59.0°N 208.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 15 days

Time span: August 14 2020 to August 28 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 4.4 °C
  • Mean temperature: 13.4 °C
  • Maximum temperature anomaly: 9.2 °C
  • Maximum temperature: 20.1 °C

Event center: 59.0°N 208.0°E

Area affected: 1869447 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-Aug-14_to_2020-Aug-28_208.0_59.0

Cold spell occuring from August 06 2020 to August 14 2020 at 53.5°N 232.0°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: August 06 2020 to August 14 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 8.7 °C
  • Minimum temperature anomaly: -8.5 °C
  • Minimum temperature: 0.8 °C

Event center: 53.5°N 232.0°E

Area affected: 257372 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-Aug-06_to_2020-Aug-14_232.0_53.5

Cold spell occuring from August 03 2020 to August 06 2020 at 40.0°N 267.0°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: August 03 2020 to August 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -4.9 °C
  • Mean temperature: 19.6 °C
  • Minimum temperature anomaly: -7.4 °C
  • Minimum temperature: 13.4 °C

Event center: 40.0°N 267.0°E

Area affected: 801272 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-Aug-03_to_2020-Aug-06_267.0_40.0

Heat wave occuring from July 31 2020 to August 06 2020 at 30.5°N 277.0°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 31 2020 to August 06 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.3 °C
  • Mean temperature: 29.5 °C
  • Maximum temperature anomaly: 3.8 °C
  • Maximum temperature: 31.2 °C

Event center: 30.5°N 277.0°E

Area affected: 66491 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-31_to_2020-Aug-06_277.0_30.5

Heat wave occuring from July 29 2020 to August 04 2020 at 54.0°N 227.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 7 days

Time span: July 29 2020 to August 04 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 3.4 °C
  • Mean temperature: 15.6 °C
  • Maximum temperature anomaly: 7.1 °C
  • Maximum temperature: 20.9 °C

Event center: 54.0°N 227.0°E

Area affected: 125761 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-29_to_2020-Aug-04_227.0_54.0

Heat wave occuring from July 28 2020 to August 03 2020 at 52.0°N 243.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 7 days

Time span: July 28 2020 to August 03 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 5.1 °C
  • Mean temperature: 21.5 °C
  • Maximum temperature anomaly: 8.1 °C
  • Maximum temperature: 35.6 °C

Event center: 52.0°N 243.5°E

Area affected: 474855 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-28_to_2020-Aug-03_243.5_52.0

Cold spell occuring from July 26 2020 to July 29 2020 at 30.5°N 265.5°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: July 26 2020 to July 29 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -2.1 °C
  • Mean temperature: 25.8 °C
  • Minimum temperature anomaly: -3.4 °C
  • Minimum temperature: 23.8 °C

Event center: 30.5°N 265.5°E

Area affected: 101671 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-26_to_2020-Jul-29_265.5_30.5

Cold spell occuring from July 25 2020 to August 07 2020 at 26.5°N 260.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 14 days

Time span: July 25 2020 to August 07 2020

Statistics over entire affected area:

  • Mean temperature anomaly: -3.4 °C
  • Mean temperature: 23.6 °C
  • Minimum temperature anomaly: -6.6 °C
  • Minimum temperature: 14.2 °C

Event center: 26.5°N 260.5°E

Area affected: 355336 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-25_to_2020-Aug-07_260.5_26.5

Heat wave occuring from July 20 2020 to July 24 2020 at 57.0°N 207.5°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: July 20 2020 to July 24 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 13.8 °C
  • Maximum temperature anomaly: 3.8 °C
  • Maximum temperature: 15.5 °C

Event center: 57.0°N 207.5°E

Area affected: 77342 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-20_to_2020-Jul-24_207.5_57.0

Heat wave occuring from July 19 2020 to July 24 2020 at 41.0°N 293.0°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: July 19 2020 to July 24 2020

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 24.3 °C
  • Maximum temperature anomaly: 5.1 °C
  • Maximum temperature: 26.8 °C

Event center: 41.0°N 293.0°E

Area affected: 65688 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-19_to_2020-Jul-24_293.0_41.0