Category: Extremes affecting United States

Heat wave occuring from August 14 2023 to August 24 2023 at 73.5°N 209.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 11 days

Time span: August 14 2023 to August 24 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 4.5 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 13.6 °C

Event center: 73.5°N 209.0°E

Area affected: 375882 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_2023-Aug-14_to_2023-Aug-24_209.0_73.5

Cold spell occuring from August 01 2023 to August 09 2023 at 43.0°N 252.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 9 days

Time span: August 01 2023 to August 09 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 16.3 °C
  • Minimum temperature anomaly: -8.0 °C
  • Minimum temperature: 6.5 °C

Event center: 43.0°N 252.0°E

Area affected: 562871 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_2023-Aug-01_to_2023-Aug-09_252.0_43.0

Heat wave occuring from August 01 2023 to August 04 2023 at 46.5°N 263.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 4 days

Time span: August 01 2023 to August 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.5 °C
  • Mean temperature: 25.9 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 28.3 °C

Event center: 46.5°N 263.5°E

Area affected: 75029 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_2023-Aug-01_to_2023-Aug-04_263.5_46.5

Heat wave occuring from July 30 2023 to August 07 2023 at 64.5°N 198.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 9 days

Time span: July 30 2023 to August 07 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.9 °C
  • Mean temperature: 16.4 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 19.9 °C

Event center: 64.5°N 198.5°E

Area affected: 222299 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_2023-Jul-30_to_2023-Aug-07_198.5_64.5

Cold spell occuring from July 28 2023 to August 04 2023 at 47.5°N 287.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 8 days

Time span: July 28 2023 to August 04 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 14.3 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 8.0 °C

Event center: 47.5°N 287.5°E

Area affected: 838008 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_2023-Jul-28_to_2023-Aug-04_287.5_47.5

Cold spell occuring from July 15 2023 to July 17 2023 at 49.5°N 257.5°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 15 2023 to July 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: 14.7 °C
  • Minimum temperature anomaly: -5.8 °C
  • Minimum temperature: 13.0 °C

Event center: 49.5°N 257.5°E

Area affected: 86109 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_2023-Jul-15_to_2023-Jul-17_257.5_49.5

Heat wave occuring from July 13 2023 to July 23 2023 at 58.0°N 225.0°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 13 2023 to July 23 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: 15.7 °C
  • Maximum temperature anomaly: 5.6 °C
  • Maximum temperature: 19.7 °C

Event center: 58.0°N 225.0°E

Area affected: 53457 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_2023-Jul-13_to_2023-Jul-23_225.0_58.0

Cold spell occuring from July 10 2023 to July 20 2023 at 72.0°N 214.5°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: July 10 2023 to July 20 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -1.5 °C
  • Mean temperature: -0.2 °C
  • Minimum temperature anomaly: -2.7 °C
  • Minimum temperature: -0.6 °C

Event center: 72.0°N 214.5°E

Area affected: 118209 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_2023-Jul-10_to_2023-Jul-20_214.5_72.0

Cold spell occuring from July 09 2023 to July 11 2023 at 36.0°N 271.0°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: July 09 2023 to July 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.5 °C
  • Mean temperature: 24.4 °C
  • Minimum temperature anomaly: -4.7 °C
  • Minimum temperature: 22.7 °C

Event center: 36.0°N 271.0°E

Area affected: 63277 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_2023-Jul-09_to_2023-Jul-11_271.0_36.0

Cold spell occuring from July 07 2023 to July 11 2023 at 61.0°N 202.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 5 days

Time span: July 07 2023 to July 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 10.2 °C
  • Minimum temperature anomaly: -5.8 °C
  • Minimum temperature: 6.4 °C

Event center: 61.0°N 202.0°E

Area affected: 83561 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_2023-Jul-07_to_2023-Jul-11_202.0_61.0