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​Early Monsoon Signs Emerge Amid Ongoing
ENSO-Neutral Conditions in Southeast Asia

Click Here to See Forecasts (times in UTC; Local Time = UTC + 7 for Indochina)

HPC Status: UP AND RUNNING (Thailand ONLY).

Website Status: the Indochina weather, gas and particle pollutant animations are NOW updated.

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ENSO Neutral Conditions Prevailed in April with Neutral  Conditions Most Likely in May to October 2025

May 22, 2025 - Model outlooks from Copernicus C3S based on the Nino3.4 SST index, show that ENSO Neutral conditions prevailed in April and is predicted to continue to be ENSO neutral from May to October 2025.

Early Monsoon Signals Detected in Southeast Asia for 2025, Surpassing Previous Years

May 22, 2025 - Satellite-based Outgoing Longwave Radiation (OLR) data show an unusually early onset of convective activity across Southeast Asia this year, with significant cloud cover and storm potential emerging as early as March—earlier than both 2023 and 2024.
 

While 2023 saw an intense and prolonged monsoon season and 2024 followed with strong but more typical timing, 2025 is already registering below-average OLR levels well ahead of the usual schedule. This suggests enhanced rainfall and thunderstorm activity may arrive weeks earlier than normal, raising concerns for agriculture, infrastructure, and flood preparedness in the region.

Source: http://www.bom.gov.au/climate/mjo/#tabs=Regional-cloudiness

ASIA-AQ Aircraft Campaign: A Success!

April 11, 2024 - The ASIA-AQ aircraft campaign has concluded and was successful to take measurements of air pollution over the Philippines from February 1-14, over South Korea from February 15 - March 12, and over Thailand from March 13-26, as well over Taiwan (during transits). 

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Thailand summary at (in Thai and English): https://youtu.be/RabP4vJwve0?feature=shared

 

More details can be found on: https://espo.nasa.gov/asia-aq/content/ASIA-AQ
 

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