Category: Extremes affecting United States

(ongoing) Cold spell occuring from May 01 2026 to May 03 2026 at 32.0°N 271.5°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: May 01 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 15.7 °C
  • Minimum temperature anomaly: -6.3 °C
  • Minimum temperature: 14.0 °C

Event center: 32.0°N 271.5°E

Area affected: 71015 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2026-May-01_to_2026-May-03_271.5_32.0

(ongoing) Cold spell occuring from May 01 2026 to May 03 2026 at 28.5°N 261.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 3 days

Time span: May 01 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: 18.6 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: 14.6 °C

Event center: 28.5°N 261.0°E

Area affected: 73185 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2026-May-01_to_2026-May-03_261.0_28.5

(ongoing) Cold spell occuring from May 01 2026 to May 03 2026 at 40.5°N 279.5°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: May 01 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -6.9 °C
  • Mean temperature: 6.5 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: 2.2 °C

Event center: 40.5°N 279.5°E

Area affected: 244531 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2026-May-01_to_2026-May-03_279.5_40.5

(ongoing) Heat wave occuring from April 30 2026 to May 03 2026 at 25.0°N 282.0°E

Download data: JSON

Event type: Heat wave

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

  • Bahamas
  • United States

Duration: 4 days

Time span: April 30 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 25.2 °C
  • Maximum temperature anomaly: 4.2 °C
  • Maximum temperature: 29.0 °C

Event center: 25.0°N 282.0°E

Area affected: 401786 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Apr-30_to_2026-May-03_282.0_25.0

(ongoing) Heat wave occuring from April 25 2026 to May 03 2026 at 48.5°N 291.0°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 25 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 5.4 °C
  • Mean temperature: 5.2 °C
  • Maximum temperature anomaly: 10.0 °C
  • Maximum temperature: 15.9 °C

Event center: 48.5°N 291.0°E

Area affected: 1017992 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Apr-25_to_2026-May-03_291.0_48.5

(ongoing) Heat wave occuring from April 19 2026 to May 03 2026 at 49.5°N 234.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 15 days

Time span: April 19 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 7.1 °C
  • Mean temperature: 14.4 °C
  • Maximum temperature anomaly: 14.6 °C
  • Maximum temperature: 24.5 °C

Event center: 49.5°N 234.0°E

Area affected: 1910635 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Apr-19_to_2026-May-03_234.0_49.5

(ongoing) Cold spell occuring from April 11 2026 to May 03 2026 at 76.0°N 279.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Greenland
  • United States

Duration: 23 days

Time span: April 11 2026 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.8 °C
  • Mean temperature: -20.5 °C
  • Minimum temperature anomaly: -16.5 °C
  • Minimum temperature: -37.6 °C

Event center: 76.0°N 279.0°E

Area affected: 5447322 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2026-Apr-11_to_2026-May-03_279.0_76.0

(ongoing) Heat wave occuring from October 16 2022 to May 03 2026 at 10.5°N 294.0°E

Download data: JSON

Event type: Heat wave

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

  • Afghanistan
  • Albania
  • Algeria
  • Andorra
  • Angola
  • Antarctica
  • Argentina
  • Armenia
  • Aruba
  • Australia
  • Austria
  • Azerbaijan
  • Azores
  • Bahamas
  • Bahrain
  • Bangladesh
  • Belarus
  • Belgium
  • Belize
  • Benin
  • Bhutan
  • Bolivia
  • Bosnia and Herzegovina
  • Botswana
  • Brazil
  • Brunei Darussalam
  • Bulgaria
  • Burkina Faso
  • Burundi
  • Cabo Verde
  • Cambodia
  • Cameroon
  • Canada
  • Canarias
  • Central African Republic
  • Chad
  • Chile
  • China
  • Colombia
  • Congo
  • Congo DRC
  • Costa Rica
  • Croatia
  • Cuba
  • Cyprus
  • Czech Republic
  • Côte d’Ivoire
  • Denmark
  • Djibouti
  • Dominican Republic
  • Ecuador
  • Egypt
  • El Salvador
  • Equatorial Guinea
  • Eritrea
  • Estonia
  • Eswatini
  • Ethiopia
  • Falkland Islands
  • Faroe Islands
  • Fiji
  • Finland
  • France
  • French Guiana
  • French Southern Territories
  • Gabon
  • Gambia
  • Georgia
  • Germany
  • Ghana
  • Greece
  • Greenland
  • Guatemala
  • Guinea
  • Guinea-Bissau
  • Guyana
  • Haiti
  • Honduras
  • Hungary
  • Iceland
  • India
  • Indonesia
  • Iran
  • Iraq
  • Ireland
  • Israel
  • Italy
  • Jamaica
  • Japan
  • Jordan
  • Kazakhstan
  • Kenya
  • Kuwait
  • Kyrgyzstan
  • Laos
  • Latvia
  • Lebanon
  • Lesotho
  • Liberia
  • Libya
  • Lithuania
  • Luxembourg
  • Madagascar
  • Madeira
  • Malawi
  • Malaysia
  • Mali
  • Martinique
  • Mauritania
  • Mauritius
  • Mexico
  • Moldova
  • Mongolia
  • Montenegro
  • Morocco
  • Mozambique
  • Myanmar
  • Namibia
  • Nepal
  • Netherlands
  • New Caledonia
  • New Zealand
  • Nicaragua
  • Niger
  • Nigeria
  • North Korea
  • North Macedonia
  • Norway
  • Oman
  • Pakistan
  • Palau
  • Palestinian Territory
  • Panama
  • Papua New Guinea
  • Paraguay
  • Peru
  • Philippines
  • Poland
  • Portugal
  • Puerto Rico
  • Qatar
  • Romania
  • Russian Federation
  • Rwanda
  • Réunion
  • Saint Eustatius
  • Saint Lucia
  • Samoa
  • Saudi Arabia
  • Senegal
  • Serbia
  • Sierra Leone
  • Slovakia
  • Slovenia
  • Solomon Islands
  • Somalia
  • South Africa
  • South Georgia and the South Sandwich Islands
  • South Korea
  • South Sudan
  • Spain
  • Sri Lanka
  • Sudan
  • Suriname
  • Sweden
  • Switzerland
  • Syria
  • Tajikistan
  • Tanzania
  • Thailand
  • Timor-Leste
  • Togo
  • Tunisia
  • Turkiye
  • Turkmenistan
  • Turks and Caicos Islands
  • Uganda
  • Ukraine
  • United Arab Emirates
  • United Kingdom
  • United States
  • Uruguay
  • Uzbekistan
  • Vanuatu
  • Venezuela
  • Vietnam
  • Yemen
  • Zambia
  • Zimbabwe

Duration: 1296 days

Time span: October 16 2022 to May 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 3.4 °C
  • Mean temperature: 18.1 °C
  • Maximum temperature anomaly: 33.2 °C
  • Maximum temperature: 46.7 °C

Event center: 10.5°N 294.0°E

Area affected: 509588681 km$^2$


Fig. 1: unavailable since event is ongoing.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2022-Oct-16_to_2026-May-03_294.0_10.5

Heat wave occuring from April 25 2026 to April 28 2026 at 67.0°N 196.5°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: April 25 2026 to April 28 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: 1.1 °C
  • Maximum temperature anomaly: 7.6 °C
  • Maximum temperature: 4.9 °C

Event center: 67.0°N 196.5°E

Area affected: 61284 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_2026-Apr-25_to_2026-Apr-28_196.5_67.0

Heat wave occuring from April 24 2026 to April 28 2026 at 65.5°N 192.5°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 24 2026 to April 28 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 0.3 °C
  • Maximum temperature anomaly: 7.4 °C
  • Maximum temperature: 3.2 °C

Event center: 65.5°N 192.5°E

Area affected: 62396 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_2026-Apr-24_to_2026-Apr-28_192.5_65.5