Imagine a vast, fertile land shrouded in mystery – a winter wonderland of fog, where the familiar is obscured and daily life is thrown into disarray. This was the reality across the Indo-Gangetic Plain in early January 2026. Dense fog, coupled with freezing temperatures, blanketed the region stretching from Pakistan and northern India to Bangladesh. But what caused this atmospheric phenomenon? Let's dive in!
On January 6, 2026, NASA's Terra satellite, equipped with the MODIS (Moderate Resolution Imaging Spectroradiometer), captured a stunning image of the Ganges Delta. The image reveals low-lying clouds clinging to the landscape. This type of fog, particularly radiation fog, is a common occurrence during this time of year. It forms when the ground cools down, winds are calm, and moisture is plentiful near the surface.
The meteorological departments of both Bangladesh and India issued warnings for moderate to very dense fog that day, coinciding with an ongoing cold wave.
But that's not all. The image also showcases fascinating cloud formations extending from the land and over the Bay of Bengal. These long, parallel bands of clouds, known as cloud streets, are a result of cold air moving over warmer water, picking up heat and moisture. This creates rising air currents that are then shaped into rotating cylinders by a temperature inversion. The result? Clouds where the air rises, and clear skies where it sinks. It's a beautiful sight from above, but what about the impact on those below?
And this is the part most people miss... While the scene from space might be picturesque, the reality on the ground was far from ideal. Dense fog caused significant disruptions. Local news reports highlighted major delays and diversions at Dhaka's international airport. Similar issues, including travel setbacks on roads and railways, were reported in northern, central, and eastern India.
This brings up an interesting question: How can we better prepare for and mitigate the effects of these weather events? What innovative solutions could help minimize disruptions caused by dense fog? Share your thoughts in the comments below!
