Category: Extremes affecting United States

Cold spell occuring from April 30 2011 to May 02 2011 at 47.5°N 257.0°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: April 30 2011 to May 02 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -8.3 °C
  • Mean temperature: -0.3 °C
  • Minimum temperature anomaly: -11.4 °C
  • Minimum temperature: -5.5 °C

Event center: 47.5°N 257.0°E

Area affected: 61228 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_2011-Apr-30_to_2011-May-02_257.0_47.5

Cold spell occuring from April 29 2011 to May 04 2011 at 36.0°N 254.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 6 days

Time span: April 29 2011 to May 04 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -7.8 °C
  • Mean temperature: 0.0 °C
  • Minimum temperature anomaly: -13.5 °C
  • Minimum temperature: -10.0 °C

Event center: 36.0°N 254.0°E

Area affected: 375454 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_2011-Apr-29_to_2011-May-04_254.0_36.0

Cold spell occuring from April 29 2011 to May 01 2011 at 42.0°N 244.5°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 29 2011 to May 01 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -7.6 °C
  • Mean temperature: 2.1 °C
  • Minimum temperature anomaly: -10.7 °C
  • Minimum temperature: -4.3 °C

Event center: 42.0°N 244.5°E

Area affected: 163227 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_2011-Apr-29_to_2011-May-01_244.5_42.0

Cold spell occuring from April 25 2011 to May 03 2011 at 48.5°N 237.0°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: April 25 2011 to May 03 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 8.7 °C
  • Minimum temperature anomaly: -5.3 °C
  • Minimum temperature: 0.6 °C

Event center: 48.5°N 237.0°E

Area affected: 1524274 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_2011-Apr-25_to_2011-May-03_237.0_48.5

Cold spell occuring from April 22 2011 to April 24 2011 at 44.0°N 249.0°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 22 2011 to April 24 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: -3.4 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: -10.8 °C

Event center: 44.0°N 249.0°E

Area affected: 123222 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_2011-Apr-22_to_2011-Apr-24_249.0_44.0

Heat wave occuring from April 18 2011 to May 01 2011 at 29.5°N 260.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Mexico
  • United States

Duration: 14 days

Time span: April 18 2011 to May 01 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 23.1 °C
  • Maximum temperature anomaly: 11.0 °C
  • Maximum temperature: 34.9 °C

Event center: 29.5°N 260.0°E

Area affected: 4491455 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_2011-Apr-18_to_2011-May-01_260.0_29.5

Cold spell occuring from April 17 2011 to April 22 2011 at 48.5°N 272.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 6 days

Time span: April 17 2011 to April 22 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: 0.9 °C
  • Minimum temperature anomaly: -10.0 °C
  • Minimum temperature: -7.3 °C

Event center: 48.5°N 272.0°E

Area affected: 458443 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_2011-Apr-17_to_2011-Apr-22_272.0_48.5

Heat wave occuring from April 16 2011 to April 23 2011 at 33.5°N 254.5°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 16 2011 to April 23 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 5.2 °C
  • Mean temperature: 19.7 °C
  • Maximum temperature anomaly: 8.3 °C
  • Maximum temperature: 28.1 °C

Event center: 33.5°N 254.5°E

Area affected: 170379 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_2011-Apr-16_to_2011-Apr-23_254.5_33.5

Cold spell occuring from April 16 2011 to April 22 2011 at 48.0°N 260.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 7 days

Time span: April 16 2011 to April 22 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -8.1 °C
  • Mean temperature: -1.6 °C
  • Minimum temperature anomaly: -10.8 °C
  • Minimum temperature: -5.1 °C

Event center: 48.0°N 260.0°E

Area affected: 161398 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_2011-Apr-16_to_2011-Apr-22_260.0_48.0

Cold spell occuring from April 10 2011 to April 24 2011 at 51.0°N 231.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Russian Federation
  • United States

Duration: 15 days

Time span: April 10 2011 to April 24 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: -0.1 °C
  • Minimum temperature anomaly: -14.7 °C
  • Minimum temperature: -29.4 °C

Event center: 51.0°N 231.5°E

Area affected: 7250411 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_2011-Apr-10_to_2011-Apr-24_231.5_51.0