As Thunderstorms Hammer Mumbai, Delhi And Other Cities, IMD Explains How It Detects Thunder Clouds
Severe thunderstorms and heavy rain have disrupted life in Delhi, Mumbai and other cities, as the IMD explains how it monitors and detects these intense weather events.

Over the past few days, violent thunderstorms and heavy rainfall have swept across Delhi and Mumbai, causing widespread disruption and sparking concern among residents and authorities alike. From waterlogged roads and traffic snarls to power cuts and damaged vehicles, the turbulent weather has made its presence felt in no uncertain terms.
In Delhi, torrential downpours on May 21 led to flight delays, metro service interruptions and gridlocked streets. Many parts of the city reported fallen trees and long power outages, leaving citizens grappling with the after-effects of the storm well into the next day.
According to the India Meteorological Department (IMD), while the thunderstorm activity has eased, the capital is likely to experience a warm night with partly cloudy skies and the possibility of "thundery development towards evening or night."
Mumbai, too, has been dealing with heavy rain and thunderstorms since May 20 night. The weather bureau has issued a yellow alert for the city, forecasting thunderstorms accompanied by lightning, heavy showers and strong winds reaching speeds of 50 to 60 kmph at isolated locations. Several districts in Maharashtra are likely to continue experiencing intense rainfall and strong winds until at least May 24.
Amid the chaos caused by these sudden weather changes, the IMD released an informative video to help the public understand how thunderstorms are detected and what makes them so intense.
IMD explained in the video that thunderstorms can be detected visually and with the help of weather radars, satellites and lightning sensors. The video then went on to describe the anatomy of a thundercloud, stating that while the base of the cloud is usually around one km or lower from the ground, the top can extend upwards of 10 to 15 km or even higher. This vertical build-up is what allows thunderstorms to pack such a punch, often bringing with them severe lightning, downpours and strong winds.
Watch the video here:
FAQ:
— India Meteorological Department (@Indiametdept) May 22, 2025
What is the height of a Thunder Cloud and How can we detect it ?#FAQ #imd #mausam #thunderstorm #thundercloud @moesgoi @ndmaindia @DDNational @airnewsalerts @WMO pic.twitter.com/qXrjFKWX2N
Dramatic Visuals Flood Social Media
As storms rolled across urban skylines, social media platforms lit up with dramatic footage and photos.
In Mumbai, residents captured intense lightning flashes illuminating the city’s skyline at night and heavy rain pounding already drenched streets.
Here are a few visuals from Mumbai shared by netizens:
Landed Mumbai and welcomed by #MumbaiRains pic.twitter.com/GPgbEBMe7T
— Dr. Rahul Baxi (@baxirahul) May 21, 2025
When god surprises you!#MumbaiRains pic.twitter.com/XYvQMiak6F
— Ross ð± (@kuchbhishubhh) May 20, 2025
#MumbaiRains pic.twitter.com/1x6ezcSpid
— Mumbai Heritage (@mumbaiheritage) May 20, 2025
बारिश à¤à¥ हर बà¥à¤à¤¦ à¤à¤¹à¤¤à¥ हà¥,
— Varsha Ojha ð®ð³ (@V_arsha_) May 21, 2025
à¤à¤², à¤à¥à¤ à¤à¤¼à¤® धॠदà¥à¤¤à¥ हà¥à¤à¥¤
à¤à¤ फिर दिल à¤à¥ तà¥à¤°à¥ à¤à¤¼à¤°à¥à¤°à¤¤ हà¥,
à¤à¤², à¤à¥à¤ दà¥à¤° à¤à¤¾à¤®à¥à¤¶ रॠलà¥à¤¤à¥ हà¥à¤â¦#MumbaiRains pic.twitter.com/ifgPelXBWF
Mumbaikarsâ be safe ~ Mumbai a little while ago, Heavy rains. #MumbaiRains#Mumbai#MumbaiRain pic.twitter.com/GAN03CsF6W
— KRoshan (@Kroshan4k) May 20, 2025
Delhi and the surrounding NCR region were no different, with striking visuals shared by residents showing the intensity of the storm. From lightning streaking through the night sky to residents holding hailstones, the images captured the storm’s intensity and disruption.
#Delhi's ever changing mood - unbearable heat and humidity through the day & rain and hail storm by the night. ð¤£âï¸
— _puja_seth_ð¸ðð (@PujaSet50968724) May 21, 2025
Ufff... ð¸ðð#rain #DelhiRains #DelhiWeather #RainAlert #Weather #WeatherAlert #clouds #stome pic.twitter.com/WPdfamET8U
It rained in #Delhi as if hadnât rained for years. With such force. #DelhiRains pic.twitter.com/N6suUAJUld
— Nilanjan Datta (@BollDadaaBoll) May 21, 2025
Visuals from greater noida #DelhiRains pic.twitter.com/Xd95dINMf5
— NOVA (@vnova240) May 21, 2025
#DelhiWeather #DelhiRains pic.twitter.com/lrcI74WOkn
— CA RAJEEV GUPTA (@RajeevGuptaCA) May 21, 2025
It all started with Dust Storm - intense and dust laden duststorm! (Video 1) Later Hailstorm, Thunder, Lightning and Harsh Rains. Delhi witnesses A sudden weather shift with dust storms, thunder, rain after days of heat. #DelhiRains #DelhiHailstorm #Hailstorm #Duststorm #Delhi⦠pic.twitter.com/vlUYdOeKCJ
— Urvashi.Khona (@urvashikhona) May 21, 2025
IMD Update On Southwest Monsoon
The IMD, in its 8.45 a.m. bulletin on May 22, has said that conditions are becoming increasingly favourable for the onset of the southwest monsoon over Kerala within the next two to three days.
The monsoon is likely to advance further into more parts of the south Arabian Sea, as well as parts of the Lakshadweep Islands, Kerala, Tamil Nadu, the north, south and central Bay of Bengal and parts of the Northeastern states over the same period.