Flash floods are among the world’s deadliest natural disasters with more than 5 000 lives lost annually. Their social, economic and environmental impacts are significant. Accounting for approximately 85% of flooding cases, flash floods also have the highest mortality rate among different classes of flooding, including riverine and coastal. Flash floods differ from river floods in their short time scales and occurrence on small spatial scales, which makes flash flood forecasting a different challenge from large-river flood forecasting.
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Normal to above normal rainfall is most likely during the 2022 southwest monsoon season (June – September) over most parts of the South Asia, according to an authoritative seasonal forecast from the South Asian Climate Outlook Forum.
The ASEAN Climate Outlook Forum (ASEANCOF) has issued its seasonal forecast for June-July-August 2021 for Southeast Asia, taking into account the end of the La Niña event and the Indian Ocean Dipole (IOD), which is currently neutral though may become negative.
Normal to above normal rainfall is most likely during the 2021 southwest monsoon season (June – September) over most parts of South Asia, according to an authoritative seasonal forecast from the South Asian Climate Outlook Forum (SASCOF) released on 27 April.
A 12-day online workshop on Severe Weather and Impact-Based Warning Services was conducted to strengthen capacity and resilience in South and South East Asia.
Below-normal rainfall is likely during the 2020 October – December (OND) season over the southern parts of South Asia including some parts of extreme southeastern India and most parts of Sri Lanka and Maldives, which climatologically receive good amount of rainfall during the season, according to the South Asian Climate Outlook Forum.