Category: Extremes affecting United States

Cold spell occuring from April 27 2015 to May 04 2015 at 23.5°N 255.0°E

Download data: JSON

Event type: Cold spell

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

  • Belize
  • Guatemala
  • Honduras
  • Mexico
  • United States

Duration: 8 days

Time span: April 27 2015 to May 04 2015

Statistics over entire affected area:

  • Mean temperature anomaly: -4.4 °C
  • Mean temperature: 18.2 °C
  • Minimum temperature anomaly: -10.1 °C
  • Minimum temperature: 8.0 °C

Event center: 23.5°N 255.0°E

Area affected: 886249 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_2015-Apr-27_to_2015-May-04_255.0_23.5

Heat wave occuring from April 23 2015 to April 29 2015 at 19.5°N 204.0°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: April 23 2015 to April 29 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 24.6 °C

Event center: 19.5°N 204.0°E

Area affected: 86540 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_2015-Apr-23_to_2015-Apr-29_204.0_19.5

Cold spell occuring from April 21 2015 to May 01 2015 at 42.0°N 278.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 11 days

Time span: April 21 2015 to May 01 2015

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: -0.0 °C
  • Minimum temperature anomaly: -10.4 °C
  • Minimum temperature: -9.6 °C

Event center: 42.0°N 278.5°E

Area affected: 1308477 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_2015-Apr-21_to_2015-May-01_278.5_42.0

Cold spell occuring from April 21 2015 to April 23 2015 at 44.5°N 269.0°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: April 21 2015 to April 23 2015

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: 2.9 °C
  • Minimum temperature anomaly: -9.0 °C
  • Minimum temperature: -2.9 °C

Event center: 44.5°N 269.0°E

Area affected: 55240 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_2015-Apr-21_to_2015-Apr-23_269.0_44.5

Heat wave occuring from April 20 2015 to April 24 2015 at 69.5°N 207.0°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: April 20 2015 to April 24 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 7.4 °C
  • Mean temperature: -3.5 °C
  • Maximum temperature anomaly: 11.7 °C
  • Maximum temperature: -0.0 °C

Event center: 69.5°N 207.0°E

Area affected: 63834 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_2015-Apr-20_to_2015-Apr-24_207.0_69.5

Heat wave occuring from April 20 2015 to April 24 2015 at 69.0°N 222.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 5 days

Time span: April 20 2015 to April 24 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 9.0 °C
  • Mean temperature: 0.4 °C
  • Maximum temperature anomaly: 12.2 °C
  • Maximum temperature: 3.5 °C

Event center: 69.0°N 222.0°E

Area affected: 128023 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_2015-Apr-20_to_2015-Apr-24_222.0_69.0

Heat wave occuring from April 19 2015 to April 26 2015 at 70.0°N 214.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 8 days

Time span: April 19 2015 to April 26 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 7.0 °C
  • Mean temperature: -3.5 °C
  • Maximum temperature anomaly: 13.2 °C
  • Maximum temperature: 2.1 °C

Event center: 70.0°N 214.5°E

Area affected: 59546 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_2015-Apr-19_to_2015-Apr-26_214.5_70.0

Cold spell occuring from April 17 2015 to April 20 2015 at 59.5°N 192.5°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: April 17 2015 to April 20 2015

Statistics over entire affected area:

  • Mean temperature anomaly: -6.5 °C
  • Mean temperature: -10.1 °C
  • Minimum temperature anomaly: -7.8 °C
  • Minimum temperature: -12.4 °C

Event center: 59.5°N 192.5°E

Area affected: 124980 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_2015-Apr-17_to_2015-Apr-20_192.5_59.5

Heat wave occuring from April 16 2015 to April 21 2015 at 50.0°N 236.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 6 days

Time span: April 16 2015 to April 21 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 5.4 °C
  • Mean temperature: 11.7 °C
  • Maximum temperature anomaly: 8.8 °C
  • Maximum temperature: 20.3 °C

Event center: 50.0°N 236.5°E

Area affected: 324817 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_2015-Apr-16_to_2015-Apr-21_236.5_50.0

Heat wave occuring from April 11 2015 to April 19 2015 at 48.0°N 271.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 9 days

Time span: April 11 2015 to April 19 2015

Statistics over entire affected area:

  • Mean temperature anomaly: 5.4 °C
  • Mean temperature: 6.7 °C
  • Maximum temperature anomaly: 9.8 °C
  • Maximum temperature: 17.1 °C

Event center: 48.0°N 271.5°E

Area affected: 87416 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_2015-Apr-11_to_2015-Apr-19_271.5_48.0