World Meteorological Organization

🌡️ El Niño is firmly established and will intensify into a very strong event in the coming months. WMO forecasts show ~100% likelihood that it will persist through February 2027. A very strong El Niño ≠ same impacts everywhere. 🆕 WMO El Nino Update: bit.ly/4zUk77Y

In 2025, global CO₂ concentration rose to a record 426.8 parts per million. That's 153% of pre-industrial levels. Every additional ppm traps more heat and supercharges the ocean and the atmosphere. 🔗 Read the WMO Greenhouse Gas Bulletin: https://bit.ly/4iIqwMR

Greenhouse gas levels hit new record highs, locking in more long-term temperature increase. The intensifying El Niño may lead to a further surge. New WMO Greenhouse Gas Bulletin provides authoritative scientific information on the state of our climate. 👉 https://bit.ly/4iIqwMR

Incredible display of lights above the Gap of Dunloe in County Kerry, Ireland, captured during a solar storm around this time of the year in 2024! Photographer Goran Loncar said that clear skies and the absence of moonlight made this rare spectacle possible.

📢 We're hiring! WMO is looking for professionals from diverse backgrounds and areas of expertise interested in a career in meteorology, hydrology, geophysical sciences, and international development. 👉Check out all the available opportunities and apply today: https://bit.ly/4xc7MJA

No nation can tackle weather, water, and climate challenges alone. WMO joins the United Nations family in celebrating more than 8 decades of international cooperation to foster peace, unity and hope for people all around the world. Happy #UNDay!

AI is transforming how we forecast the weather and understand the climate. But how can we make it work for everyone? Explore how the Philippines & Singapore are integrating AI into their operations & building foundations for its long-term use. Register👉 https://bit.ly/WMO-AIwebinars

We're headed for an El Niño that is — quite literally — off the charts. WMO's Global Seasonal Climate Update shows that El Niño is forecast to exceed the scale of global monitoring charts. Its impacts will be felt well into 2027. Read the full update: https://bit.ly/4z2MhwQ

WMO Secretary-General Celeste Saulo & UNOCHA Humanitarian Chief Tom Fletcher call for urgent humanitarian action as El Niño is set to hit fragile communities hard. New WMO update indicates that the current El Niño event could be unprecedented in strength. SG Saulo's statement: https://bit.ly/4BnMaO0

The Antarctic ozone hole in 2025 was one of the smallest in decades. 🌎 Yet UV exposure remains a concern: since the mid-1990s, it has increased by up to 20% in parts of Europe. ☀️ Effective UV protection remains essential. Learn more: https://bit.ly/WMOOzoneUVBulletin2026pr

Grenada 🇬🇩 becomes the latest Member of the World Meteorological Organization, having deposited its instrument of accession to the WMO Convention. WMO now has 194 Members: 188 Member States and 6 Member Territories. Congratulations, and welcome to the WMO family! Learn more: https://bit.ly/4s9jiVe

The total amount of water stored in groundwater, lakes and rivers, soil moisture, vegetation and ice and snow – has been in decline since mid-2010s. Read the WMO #StateOfWater Report 2025 to learn about what this means for the water we depend on. https://bit.ly/WMOStateofWater2025Report

As El Niño strengthens, above-normal temperatures are forecast across much of the world, threatening food systems. Extreme heat can reduce fish catches and crop yields, stress livestock and endanger farmers' health. Learn more: https://bit.ly/49pZUuZ #WorldFoodDay

Did you know that El Niño was first observed by Peruvian fishermen, who noticed that unusually warm coastal waters sometimes appeared and reduced their catches? From South America to Africa & South Asia, discover how El Niño impacts food systems globally. 👉 https://bit.ly/4ymTbM4 #WorldFoodDay

The intensifying El Niño is likely to bring above-average temperatures to much of the globe and shift rainfall patterns, increasing the risk of drought and floods in different regions. Read the latest WMO Global Seasonal Climate Update: https://bit.ly/4hFr1XD

📢 We’re hiring! WMO is looking for consultants with expertise in speechwriting, national framework development and linguistic technology to support various areas of our work. Explore the available opportunities and apply today: https://bit.ly/4xc7MJA

Today more than 120 countries have multi-hazard early warning systems, a big leap from ~50 countries a decade ago. But many are still unprotected. #EarlyWarningsForAll is not a luxury. It saves lives, reduces economic losses, & provides tenfold return on investment. #DRRday

From record-breaking rain in Tokyo to the spectacular flowering of Chile's Atacama Desert, El Niño is influencing weather patterns far beyond the tropical Pacific. El Niño will continue to intensify ahead of its forecast peak in December. WMO Global Seasonal Climate Update: https://bit.ly/4hFr1XD

Sea-surface temperature anomalies across central-eastern equatorial Pacific, where El Niño develops, is forecast to reach 3.7°C above normal for the Oct-Dec 2026 season. Set to be the highest on record and stronger than the previous record in late 2015. https://bit.ly/4hFr1XD

Isaias has become the 1st hurricane of an exceptionally quiet Atlantic season. @noaa.gov @nws.noaa.gov says Isaias is strengthening & expected to approach northern US Gulf Coast as a “dangerous hurricane” on Friday. Storm surge & hurricane warnings in effect. https://www.nhc.noaa.gov/#Isaias

El Niño will continue to intensify ahead of its forecast peak in December. Sea-surface temperatures in central and eastern tropical Pacific are set to increase to record levels. Above-average temperatures globally and shift in rainfall patterns are likely. ↪️ https://bit.ly/4i863AS

Asia and Africa were the most affected by water-related extreme events in 2025, according to the WMO #StateOfWater Report. Several African countries experienced widespread flooding while South & SE Asia experienced compounded effects of cyclones & monsoons. ↪️ https://bit.ly/WMOStateofWater2025Report

The first #GlobalHeatForum kicks off in Bangkok, Thailand, to unlock finance and accelerate solutions to extreme heat, amid record-breaking temperatures and an intensifying El Niño. Learn more: bit.ly/4zaps9Y 📹 Follow the discussions youtube.com/@heathealth_...

📢 Call for Abstracts Share your latest research, innovations or operational advances under the theme ‘Advancing Weather Science for Resilient Societies’ and contribute to the upcoming World Weather Research Programme Conference 2027. Deadline: 31 Dec https://bit.ly/4wdVJen

Earth observation satellites orbit the planet day and night, all year round. They provide critical insights into Earth’s weather, water and climate — monitoring changes and helping us prepare for what’s ahead. View the world from above this #WorldSpaceWeek 🛰️

The winners of the WMO 2027 Calendar Competition have been revealed. But more stunning photographs deserve to be celebrated. Here are nine Honourable Mentions that stood out for bringing the theme, 𝐘𝐨𝐮𝐫 𝐖𝐞𝐚𝐭𝐡𝐞𝐫, 𝐘𝐨𝐮𝐫 𝐖𝐨𝐫𝐥𝐝, to life! https://bit.ly/4jxEeTE

El Niño is set to affect temperature, rainfall and tropical cyclone patterns throughout the South-West Indian Ocean region. Find out the most likely conditions for the different countries in the region throughout March 2027: https://bit.ly/4yhDyFX

Hundreds of photographers from across the globe shared how weather, water & climate have shaped their world. 13 remarkable photographs stood out for the way they brought 𝐘𝐨𝐮𝐫 𝐖𝐞𝐚𝐭𝐡𝐞𝐫, 𝐘𝐨𝐮𝐫 𝐖𝐨𝐫𝐥𝐝 to life. Discover the WMO 2027 Calendar Photo Competition winners! 👉 https://bit.ly/4jxUVyb

From 6-9 October 2026, experts, scientists, policymakers and investors will meet at the #GlobalHeatForum in Bangkok to tackle the growing risks of extreme heat to health, livelihoods, environment and economies. Join WMO, @heathealth.info and partners 🔗 https://www.heathealth.info/globalheatforum

WMO & @ITU call to safeguard access to radio frequency spectrum essential for weather forecasts, #EarlyWarnings, climate monitoring and water management, alongside a 🆕 Handbook on Use of Radio Spectrum for Meteorology: bit.ly/3VT0hdA

The Antarctic ozone hole in 2025 was one of the smallest in decades. 🌎 Yet UV exposure remains a concern: since the mid-1990s, it has increased by up to 20% in parts of Europe. ☀️ Effective UV protection remains essential. Learn more: https://bit.ly/WMOOzoneUVBulletin2026pr

🌊 WMO welcomes the new United Nations General Assembly Declaration on Sea Level Rise. WMO stands ready to work with countries and partners to strengthen observations, early warning systems and climate information and services, helping communities better prepare. https://bit.ly/3Vgv7wy

2025 was the 4th consecutive year of widespread glacier loss across all regions. Each bar shows the global glacier mass change in one hydrological year, from 1976 onwards. 🔵 = ice gain; 🔴 = ice loss. 📖 Read more: https://bit.ly/WMOStateofWater2025Report #StateofWater

Today is #WorldMaritimeDay 🚢 Learn more about how the WMO community works to keep ships and coastal communities safe through accurate marine forecasts and early warnings. 🔗 https://bit.ly/WMOMarinesServices

Which season are you saying hello to? 🌍 Today at 2:04 CEST, the Sun crossed the equator, and Earth reached its September equinox. While the Northern Hemisphere said hello to autumn, the Southern Hemisphere said hello to spring. 📹 @esa.int/@eumetsat.int

It's been an unusually quiet Atlantic hurricane season - partly due to El Niño. But not in the Pacific. 🌀 Hurricane Polo intensified rapidly in the Eastern Pacific and is currently at category 4 strength, with maximum sustained winds near 240 km/h. 🔗 Hurricanes.gov

WMO SG Celeste Saulo joins @ec.europa.eu President @vonderleyen.ec.europa.eu & Canadian Prime Minister @mark-carney.bsky.social at #UNGA for the high-level pledging event of the OceanEye International Alliance for the Global Ocean Observing System. 23 Sept | 1000 EDT 🔴 LIVE: https://bit.ly/4hkMovU

Today, WMO Secretary-General, Celeste Saulo joined world leaders at the 81st United Nations General Assembly. 🎥 Watch as SG Saulo shares WMO role in building trust through reliable scientific data sharing across the world.

At #UNGA81, WMO SG Celeste Saulo joined UN Partnerships #GoalsLounge to discuss preparing cities for extreme heat. Agree in advance: 1) what threshold triggers action, 2) who acts, 3) who's reached first. 📹 https://bit.ly/3V6jM25 #EarlyWarningsforAll

Today at #UNGA, join WMO Secretary-General Celeste Saulo and speakers to explore what it takes to prepare cities against the risks of extreme heat. 🗓️ 21 September | 1400 EDT 🔴 Live from @UN_Partnerships #GoalsLounge: webtv.un.org/en/asset/k19/k19ezxee3b

Forecasts for the weeks ahead inform disaster preparedness, agriculture, water management, energy supply, public health & humanitarian operations. Join WMO & @ECMWF to explore how AI advances open new possibilities for sub-seasonal forecasting. Register: https://bit.ly/4cXLSTf

“The powerful 2023/2024 El Niño contributed to 2024 being the warmest year on record. We shouldn't be surprised if this record is broken,” said WMO SG Celeste Saulo. But, we have the forecasts and foresight to save lives and livelihoods. https://bit.ly/4x1LoCD

2025 was one of the driest years for rivers globally in 35 years. Over 36% of global basin areas experienced below-normal flows. Our declining freshwater storage poses serious risks. Explore the findings of the WMO global #StateOfWater report 2025: https://bit.ly/WMOStateOfWater2025pr

Rivers across the globe in 2025 had one of the driest years in more than 3 decades. The WMO Global #StateOfWater Report 2025 shows a continuation of the long-term decline in Earth’s freshwater storage and in glacier retreat. 🔴 OUT NOW: https://bit.ly/WMOStateOfWater2025pr

The ozone layer continues to heal 🌍 The WMO Ozone & UV Bulletin released on #OzoneDay shows that the Antarctic ozone hole in 2025 was one of the smallest in decades. However, measurements also show a significant increase in days with high UV exposure. ↪️ https://bit.ly/WMOOzoneUVBulletin2026pr

Open-source innovations developed in Africa are strengthening #EarlyWarnings in the region and across the world! 💻 🚨 On the International Day of Science, Technology & Innovation for the South, here are 3️⃣ tools transforming climate information services. ↪️ https://climtech.africa/

We're hiring! WMO is looking for professionals from diverse backgrounds and areas of expertise interested in a career in meteorology, hydrology, geophysical sciences, and international cooperation. Check out all vacancies here 👉 https://bit.ly/4elYNiX

Earth just had the hottest August on record, accdg to @copernicusecmwf.bsky.social C3S & @noaa.gov reports. El Niño was one of the drivers of the climate in August. It also influenced global tropical cyclone activity, as well as heavy rainfall & floods in some countries. https://bit.ly/4imPAJJ

Read the WMO Air Quality & Climate Bulletin and explore new findings on: 🔍 Global particulate matter concentrations 2025 ☁️ Aerosol–cloud interactions 🔥 Wildfire emissions & global health 🔬 Microplastics 🌡️ Heatwaves & ground-level ozone pollution https://bit.ly/3UBN1cV

August 2026 was the warmest August on record. It was also the warmest summer on record for North America and Western Europe. From record-high temperatures to heavy storms, This map from @noaa.gov shows the recent weather & climate events around the world. https://bit.ly/46hNGmw

August 2026 was the world’s warmest month on record, tied with July 2023. According to Copernicus Climate Change Service, it was also the warmest summer ever recorded in Western Europe. Read more: https://bit.ly/46fKLL4