Category: Extremes affecting United States

Cold spell occuring from April 02 2023 to May 03 2023 at 59.5°N 204.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Russian Federation
  • Svalbard and Jan Mayen
  • United States

Duration: 32 days

Time span: April 02 2023 to May 03 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -6.8 °C
  • Mean temperature: -18.7 °C
  • Minimum temperature anomaly: -25.9 °C
  • Minimum temperature: -37.5 °C

Event center: 59.5°N 204.5°E

Area affected: 11288963 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-Apr-02_to_2023-May-03_204.5_59.5

Cold spell occuring from March 30 2023 to April 20 2023 at 27.5°N 245.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 22 days

Time span: March 30 2023 to April 20 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 8.5 °C
  • Minimum temperature anomaly: -18.8 °C
  • Minimum temperature: -17.4 °C

Event center: 27.5°N 245.0°E

Area affected: 5445032 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-Mar-30_to_2023-Apr-20_245.0_27.5

Heat wave occuring from March 26 2023 to March 31 2023 at 71.5°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: 6 days

Time span: March 26 2023 to March 31 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 8.6 °C
  • Mean temperature: -11.1 °C
  • Maximum temperature anomaly: 19.1 °C
  • Maximum temperature: -2.6 °C

Event center: 71.5°N 207.5°E

Area affected: 71747 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-Mar-26_to_2023-Mar-31_207.5_71.5

Heat wave occuring from March 22 2023 to April 09 2023 at 25.5°N 268.5°E

Download data: JSON

Event type: Heat wave

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

  • Bahamas
  • Cuba
  • Guatemala
  • Mexico
  • United States

Duration: 19 days

Time span: March 22 2023 to April 09 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 24.2 °C
  • Maximum temperature anomaly: 12.5 °C
  • Maximum temperature: 32.9 °C

Event center: 25.5°N 268.5°E

Area affected: 5576119 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-Mar-22_to_2023-Apr-09_268.5_25.5

Heat wave occuring from March 16 2023 to March 23 2023 at 58.0°N 226.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 8 days

Time span: March 16 2023 to March 23 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 6.4 °C
  • Mean temperature: 0.4 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: 6.2 °C

Event center: 58.0°N 226.5°E

Area affected: 207949 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-Mar-16_to_2023-Mar-23_226.5_58.0

Cold spell occuring from March 16 2023 to April 01 2023 at 48.5°N 252.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Mexico
  • United States

Duration: 17 days

Time span: March 16 2023 to April 01 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -7.0 °C
  • Mean temperature: 0.8 °C
  • Minimum temperature anomaly: -18.5 °C
  • Minimum temperature: -28.1 °C

Event center: 48.5°N 252.5°E

Area affected: 10959071 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-Mar-16_to_2023-Apr-01_252.5_48.5

Cold spell occuring from March 15 2023 to March 19 2023 at 47.0°N 196.0°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: March 15 2023 to March 19 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.2 °C
  • Mean temperature: 0.9 °C
  • Minimum temperature anomaly: -4.9 °C
  • Minimum temperature: -3.7 °C

Event center: 47.0°N 196.0°E

Area affected: 1520655 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-Mar-15_to_2023-Mar-19_196.0_47.0

Heat wave occuring from March 11 2023 to March 14 2023 at 23.5°N 281.5°E

Download data: JSON

Event type: Heat wave

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

  • Cuba
  • United States

Duration: 4 days

Time span: March 11 2023 to March 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.3 °C
  • Mean temperature: 25.1 °C
  • Maximum temperature anomaly: 4.4 °C
  • Maximum temperature: 25.9 °C

Event center: 23.5°N 281.5°E

Area affected: 64900 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-Mar-11_to_2023-Mar-14_281.5_23.5

Cold spell occuring from March 11 2023 to March 14 2023 at 57.0°N 223.5°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: March 11 2023 to March 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.7 °C
  • Mean temperature: 0.1 °C
  • Minimum temperature anomaly: -5.9 °C
  • Minimum temperature: -3.1 °C

Event center: 57.0°N 223.5°E

Area affected: 77420 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-Mar-11_to_2023-Mar-14_223.5_57.0

Cold spell occuring from March 06 2023 to March 10 2023 at 55.0°N 225.0°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: March 06 2023 to March 10 2023

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 0.0 °C
  • Minimum temperature anomaly: -8.4 °C
  • Minimum temperature: -8.2 °C

Event center: 55.0°N 225.0°E

Area affected: 109861 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-Mar-06_to_2023-Mar-10_225.0_55.0