The guidance in this publication consists of generic definitions and methodologies for the characterization of extreme weather and climate events. This publication contribute to ensuring consistent exchange of information that underpins the WMO State of the Climate Reports, Climate Watches, climate ...change studies and other emerging applications. The purpose of the present guidelines is not to change the practice at the national level. Instead, it provides guidance for generic definitions, which are useful in contributing to WMO State of the Climate reports, climate watches, climate change studies and other emerging applications, including the recently adopted methodology for cataloguing hazardous events (WMO-CHE). These applications require regional and/or international exchange of information on extreme events. more

Asia remained the world’s most disaster-hit region from weather, climate and water-related hazards in 2023. Floods and storms caused the highest number of reported casualties and economic losses, whilst the impact of heatwaves became more severe, according to a new report from the World Meteorolog...ical Organization (WMO). The State of the Climate in Asia 2023 report highlighted the accelerating rate of key climate change indicators such as surface temperature, glacier retreat and sea level rise, which will have major repercussions for societies, economies and ecosystems in the region. In 2023, sea-surface temperatures in the north-west Pacific Ocean were the highest on record. Even the Arctic Ocean suffered a marine heatwave. Asia is warming faster than the global average. The warming trend has nearly doubled since the 1961–1990 period. more