Weather of 2023

A cold snap began in Afghanistan on January 10, 2023. Temperatures reached as low as −33 °C (−27 °F) and snowfall was as high as 30 centimetres (12 in) in more mountainous regions. The cold snap has so far killed 162 people, making it the deadliest weather event of 2023 so far. Additionally, nearly 80,000 livestock were killed.

In December 2022, a series of floods began to severely affect the provinces of Misamis Occidental and Misamis Oriental, and some parts of the Visayan islands in the Philippines. The floods were caused by intense rain, which poured down on the central and southern parts of the country.

Tropical Cyclone Cheneso was a strong tropical cyclone that affected Madagascar in January 2023. The fourth tropical storm and fifth tropical cyclone of the 2022–23 South-West Indian Ocean cyclone season, Cheneso developed out of a zone of disturbed weather status which was first monitored at RSMC La Réunion on 17 January. Despite convection wrapping into the curved band pattern, the system formed into a tropical depression on 18 January. The depression strengthened into Severe Tropical Storm Cheneso on the following day. Cheneso made landfall over northern Madagascar and weakened into an inland depression, before emerging into the Mozambique Channel. Cheneso later strengthened into a tropical cyclone on 25 January. The system continued moving southeast, before transitioning into a post-tropical depression on 29 January.

Floods caused by multiple atmospheric rivers in California beginning on December 31, 2022 resulted in periods of heavy rainfall that affected parts of Southern California, the California Central Coast, Northern California and Nevada. The flooding resulted in property damage and at least 22 fatalities, making it the deadliest U.S. meteorological event of 2023 to date.

An early-season tornado outbreak impacted the Southeastern United States on January 12, 2023, the result of a mid-level trough moving through, with moisture and the presence of a strong low-level jet aiding in the development of multiple severe thunderstorms. A strong EF2 tornado caused considerable damage in Winston County, Alabama, while another EF2 tornado struck Greensboro. A destructive high-end EF2 tornado struck Selma, causing widespread damage. The same storm produced a long-lived EF3 tornado that moved through Old Kingston, Titus, Equality, and Lake Martin, resulting in seven fatalities and several injuries in Autauga County alone. Another EF2 tornado from the storm struck Five Points, Stroud, and Standing Rock before crossing into Georgia. After the dissipation of that tornado, seven more tornadoes, four of which were strong, caused heavy damage across west-central Georgia, especially in LaGrange, Griffin, and Experiment, the latter two of which were struck by an EF3 tornado. Another EF2 tornado from the storm caused major damage and another fatality in the Jackson Lake area as well; an indirect death from the tornado also occurred the following day. Elsewhere, other tornadoes caused damage in Sumter and Mobile counties in Alabama, as well as parts of Mississippi, Tennessee, Kentucky, Illinois, and the Carolinas. In all, 39 tornadoes were confirmed.

Beginning on Friday, 27 January 2023, regions across the upper North Island of New Zealand have been experiencing widespread catastrophic floods caused by heavy rainfall, with Auckland being the most significantly affected.

An ice storm is currently impacting the Southern United States, bringing heavy snow and ice across the region. At least 8 deaths have been attributed to the winter storm, which has been named Winter Storm Mara by the Weather Channel.

The 2022–23 North American winter is the ongoing winter in North America, as it will occur across the continent from late 2022 to early 2023. The winter season in North America began at the winter solstice, which occurred on December 21, 2022, and it will end at the March equinox, which will occur on March 20, 2023. The first day of meteorological winter began on December 1 and will unofficially end on February 28; winter storms may still occur outside of these limits.

Mohe is a county-level city in Daxing'anling Prefecture, Heilongjiang province. It is the northernmost city in China.

China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. With an area of approximately 9.6 million square kilometres (3,700,000 sq mi), it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two special administrative regions. The national capital is Beijing, and the most populous city and financial center is Shanghai.

Algeria, officially the People's Democratic Republic of Algeria, is a country in North Africa. Algeria is bordered to the northeast by Tunisia; to the east by Libya; to the southeast by Niger; to the southwest by Mali, Mauritania, and Western Sahara; to the west by Morocco; and to the north by the Mediterranean Sea. It is considered part of the Maghreb region of North Africa. It has a semi-arid geography, with most of the population living in the fertile north and the Sahara dominating the geography of the south. Algeria covers an area of 2,381,741 square kilometres (919,595 sq mi), making it the world's tenth largest nation by area, and the largest nation in Africa, being more than 200 times as large as the smallest country in the continent, The Gambia. With a population of 44 million, Algeria is the ninth-most populous country in Africa, and the 32nd-most populous country in the world. The capital and largest city is Algiers, located in the far north on the Mediterranean coast.

This page documents notable tornadoes and tornado outbreaks worldwide in 2023. Strong and destructive tornadoes form most frequently in the United States, Argentina, Brazil, Bangladesh, and Eastern India, but can occur almost anywhere under the right conditions. Tornadoes also develop occasionally in southern Canada during the Northern Hemisphere's summer and somewhat regularly at other times of the year across Europe, Asia, Argentina, Australia and New Zealand. Tornadic events are often accompanied by other forms of severe weather, including strong thunderstorms, strong winds, and hail.

Madagascar, officially the Republic of Madagascar is an island country in the Indian Ocean, approximately 400 kilometres off the coast of East Africa across the Mozambique Channel. At 592,800 square kilometres (228,900 sq mi), it is the world's second-largest island country, after Indonesia.

The 2022–23 European windstorm season is the eighth season of the European windstorm naming in Europe. The new season's storm names were announced on 1 September 2022. Storms that occur up until 31 August 2023 will be included in this season. This was the fourth season where the Netherlands participated, alongside the United Kingdom's Met Office and Ireland's Met Éireann in the western group. The Portuguese, Spanish, French and Belgian meteorological agencies collaborated for the sixth time, joined by Luxembourg's agency. This is the second season where Greece, Israel and Cyprus, and Italy, Slovenia, Croatia, Montenegro, North Macedonia and Malta named storms which affected their areas.

A cold snap began in Afghanistan on January 10, 2023. Temperatures reached as low as −33 °C (−27 °F) and snowfall was as high as 30 centimetres (12 in) in more mountainous regions. The cold snap has so far killed 162 people, making it the deadliest weather event of 2023 so far. Additionally, nearly 80,000 livestock were killed.

Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordered by Pakistan to the east and south, Iran to the west, Turkmenistan to the northwest, Uzbekistan to the north, Tajikistan to the northeast, and China to the northeast and east. Occupying 652,864 square kilometers (252,072 sq mi) of land, the country is predominantly mountainous with plains in the north and the southwest, which are separated by the Hindu Kush mountain range. As of 2021, its population is 40.2 million, composed mostly of ethnic Pashtuns, Tajiks, Hazaras, and Uzbeks. Kabul is the country's largest city and serves as its capital.

Floods caused by multiple atmospheric rivers in California beginning on December 31, 2022 resulted in periods of heavy rainfall that affected parts of Southern California, the California Central Coast, Northern California and Nevada. The flooding resulted in property damage and at least 22 fatalities, making it the deadliest U.S. meteorological event of 2023 to date.

An atmospheric river (AR) is a narrow corridor or filament of concentrated moisture (hydrosphere) in the atmosphere. Other names for this phenomenon are tropical plume, tropical connection, moisture plume, water vapor surge, and cloud band.

California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2 million residents across a total area of approximately 163,696 square miles (423,970 km2), it is the most populous U.S. state and the third-largest by area. It is also the most populated subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles and San Francisco Bay areas are the nation's second and fifth most populous urban regions respectively, with the former having more than 18.7 million residents and the latter having over 9.6 million. Sacramento is the state's capital, while Los Angeles is the most populous city in the state and the second most populous city in the country. San Francisco is the second most densely populated major city in the country. Los Angeles County is the country's most populous, while San Bernardino County is the largest county by area in the country. California borders Oregon to the north, Nevada and Arizona to the east, the Mexican state of Baja California to the south; and has a coastline along the Pacific Ocean to the west.

Denmark is a Nordic country in Northern Europe. It is the most populous and politically central constituent of the Kingdom of Denmark, a constitutionally unitary state that includes the autonomous territories of the Faroe Islands and Greenland in the North Atlantic Ocean. Metropolitan Denmark is the southernmost of the Scandinavian countries, lying south-west of Sweden, south of Norway, and north of Germany.

Angola, officially the Republic of Angola, is a country located on the west coast of Southern Africa. It is the second-largest Lusophone (Portuguese-speaking) country in both total area and population, and is the seventh-largest country in Africa. It is bordered by Namibia to the south, the Democratic Republic of the Congo to the north, Zambia to the east, and the Atlantic Ocean to the west. Angola has an exclave province, the province of Cabinda, that borders the Republic of the Congo and the Democratic Republic of the Congo. The capital and most populous city is Luanda.

Bukavu is a city in eastern Democratic Republic of the Congo (DRC), lying at the extreme south-western edge of Lake Kivu, west of Cyangugu in Rwanda, and separated from it by the outlet of the Ruzizi River. It is the capital of the South Kivu province and as of 2012 it had an estimated population of 806,940.

The Democratic Republic of the Congo (DRC) is a country in Central Africa bordered to the west by the South Atlantic Ocean. By area, the DRC is the second-largest country in Africa and the 11th-largest in the world. With a population of around 108 million, the Democratic Republic of the Congo is the most populous officially Francophone country in the world. The national capital and largest city is Kinshasa, which is also the nation's economic center. The country is bordered by the Republic of the Congo, Central African Republic, South Sudan, Uganda, Rwanda, Burundi, Tanzania, Zambia, Angola, and the Cabinda exclave of Angola.

An avalanche is a rapid flow of snow down a slope, such as a hill or mountain.

France, officially the French Republic, is a country primarily located in Western Europe. It also includes overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans, giving it one of the largest discontiguous exclusive economic zones in the world. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea; overseas territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean. Its eighteen integral regions span a combined area of 643,801 km2 (248,573 sq mi) and contain over 68 million people.

Brazil, officially the Federative Republic of Brazil, is the largest country in South America and in Latin America. At 8.5 million square kilometers (3,300,000 sq mi) and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 states and the Federal District. It is the only country in the Americas to have Portuguese as an official language. It is one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world, and the most populous Roman Catholic-majority country.

Space weather is a branch of space physics and aeronomy, or heliophysics, concerned with the time varying conditions within the Solar System, including the solar wind, emphasizing the space surrounding the Earth, including conditions in the magnetosphere, ionosphere, thermosphere, and exosphere. Space weather is distinct from, but conceptually related to, the terrestrial weather of the atmosphere of Earth. The term "space weather" was first used in the 1950s and came into common usage in the 1990s. Later, it was generalized to a "space climate" research discipline, which focuses on general behaviors of longer and larger-scale variabilities and effects.

A solar flare is an intense localized eruption of electromagnetic radiation in the Sun's atmosphere. Flares occur in active regions and are often, but not always, accompanied by coronal mass ejections, solar particle events, and other solar phenomena. The occurrence of solar flares varies with the 11-year solar cycle.

South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southern subregion of a single continent called America.

Central America is a subregion of the Americas. Its boundaries are defined as bordering Mexico to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. Central America consists of seven countries: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama. Within Central America is the Mesoamerican biodiversity hotspot, which extends from northern Guatemala to central Panama. Due to the presence of several active geologic faults and the Central America Volcanic Arc, there is a high amount of seismic activity in the region, such as volcanic eruptions and earthquakes which has resulted in death, injury, and property damage.