WMO Projects La Niña Resurgence in 2025 | 09 Sep 2025
Source: WTO
The World Meteorological Organization (WMO) has projected that the La Niña weather phenomenon may return between September and November 2025.
- La Niña: La Niña is a natural climate phenomenon that occurs when the surface waters of the central and eastern Pacific Ocean become unusually cold due to stronger-than-normal trade winds pushing warm water towards the Western Pacific (near Asia and Australia).
- It is opposite to El Niño, which is characterized by unusually warm sea surface temperatures in the same region.
- Effects of La Niña on India’s Monsoon: La Niña boosts southwest monsoon rainfall, benefiting Kharif crops and replenishing rivers, lakes, and groundwater.
- However, excessive or uneven rain can cause flooding and waterlogging in low-lying regions like Assam and Bihar.
- It also often brings colder-than-normal winters to northern states such as Jammu & Kashmir and Himachal Pradesh.
La Niña and El Niño
|
Feature |
El Niño |
La Niña |
|
Oceanic Condition |
Sea surface temperatures rise in central & eastern tropical Pacific |
Sea surface temperatures drop in central & eastern tropical Pacific |
|
Trade Winds |
Weaken or reverse, allowing warm water to move eastward |
Strengthen, pushing warm water westward toward Asia |
|
Global Weather Effects |
Floods in western South America & southern North America. |
Floods in India, Southeast Asia & Australia. |
World Meteorological Organization (WMO): WMO is a UN specialized agency for weather, climate, hydrology, and related geophysical sciences.
- It originated from the International Meteorological Organization (IMO), which was founded in 1873 to standardize global weather observations.
- IMO became WMO in 1950, and in 1951, it was designated a UN specialized agency.
|
Read More: El Nino and La Nina |