Category: Extremes affecting United States

Cold spell occuring from September 14 2011 to September 17 2011 at 36.5°N 266.0°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: September 14 2011 to September 17 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -7.6 °C
  • Mean temperature: 10.9 °C
  • Minimum temperature anomaly: -12.2 °C
  • Minimum temperature: 3.6 °C

Event center: 36.5°N 266.0°E

Area affected: 1362510 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-Sep-14_to_2011-Sep-17_266.0_36.5

Heat wave occuring from September 13 2011 to September 16 2011 at 66.0°N 224.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 4 days

Time span: September 13 2011 to September 16 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 5.7 °C
  • Mean temperature: 10.1 °C
  • Maximum temperature anomaly: 9.3 °C
  • Maximum temperature: 15.0 °C

Event center: 66.0°N 224.0°E

Area affected: 367128 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-Sep-13_to_2011-Sep-16_224.0_66.0

Heat wave occuring from September 09 2011 to September 18 2011 at 25.0°N 260.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 10 days

Time span: September 09 2011 to September 18 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 3.5 °C
  • Mean temperature: 27.0 °C
  • Maximum temperature anomaly: 7.4 °C
  • Maximum temperature: 32.8 °C

Event center: 25.0°N 260.5°E

Area affected: 798205 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-Sep-09_to_2011-Sep-18_260.5_25.0

Cold spell occuring from September 08 2011 to September 11 2011 at 58.5°N 215.5°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: September 08 2011 to September 11 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -1.8 °C
  • Mean temperature: 10.3 °C
  • Minimum temperature anomaly: -2.9 °C
  • Minimum temperature: 7.7 °C

Event center: 58.5°N 215.5°E

Area affected: 205995 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-Sep-08_to_2011-Sep-11_215.5_58.5

Heat wave occuring from September 05 2011 to September 14 2011 at 49.5°N 240.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 10 days

Time span: September 05 2011 to September 14 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 6.9 °C
  • Mean temperature: 19.0 °C
  • Maximum temperature anomaly: 12.1 °C
  • Maximum temperature: 28.4 °C

Event center: 49.5°N 240.5°E

Area affected: 3530661 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-Sep-05_to_2011-Sep-14_240.5_49.5

Cold spell occuring from September 05 2011 to September 12 2011 at 36.0°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: 8 days

Time span: September 05 2011 to September 12 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -2.8 °C
  • Mean temperature: 13.2 °C
  • Minimum temperature anomaly: -6.1 °C
  • Minimum temperature: 4.4 °C

Event center: 36.0°N 192.5°E

Area affected: 4081603 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-Sep-05_to_2011-Sep-12_192.5_36.0

Cold spell occuring from September 03 2011 to September 20 2011 at 29.5°N 270.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 18 days

Time span: September 03 2011 to September 20 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 21.5 °C
  • Minimum temperature anomaly: -10.9 °C
  • Minimum temperature: 12.0 °C

Event center: 29.5°N 270.0°E

Area affected: 2599087 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-Sep-03_to_2011-Sep-20_270.0_29.5

Cold spell occuring from August 30 2011 to September 05 2011 at 33.0°N 240.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 7 days

Time span: August 30 2011 to September 05 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -2.2 °C
  • Mean temperature: 16.3 °C
  • Minimum temperature anomaly: -3.9 °C
  • Minimum temperature: 12.8 °C

Event center: 33.0°N 240.0°E

Area affected: 133166 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-Aug-30_to_2011-Sep-05_240.0_33.0

Cold spell occuring from August 29 2011 to September 03 2011 at 36.5°N 285.0°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: August 29 2011 to September 03 2011

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 21.9 °C
  • Minimum temperature anomaly: -4.0 °C
  • Minimum temperature: 19.8 °C

Event center: 36.5°N 285.0°E

Area affected: 123263 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-Aug-29_to_2011-Sep-03_285.0_36.5

Heat wave occuring from August 26 2011 to September 08 2011 at 72.5°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: 14 days

Time span: August 26 2011 to September 08 2011

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 3.1 °C
  • Maximum temperature anomaly: 5.6 °C
  • Maximum temperature: 10.0 °C

Event center: 72.5°N 198.5°E

Area affected: 573043 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-Aug-26_to_2011-Sep-08_198.5_72.5