Three-digit rainfall is usually observed along the Western Ghats, Northeast India or the foothills of North India. Heavy rainfall in the Western Ghats is observed due to the activation of the off-shore trough, while the foothills of North India and Northeast India witness heavy showers due to the shifting of the Monsoon trough closer to the foothills.
Other than this very heavy rain is observed only when there are Monsoon systems like a depression or cyclonic circulation, which are short lived.
For the last three days heavy rain is being observed in Northeast India, particularly in Arunachal Pradesh, Meghalaya and Sikkim. According to the rainfall data available with Skymet, Cherrapunji in Meghalaya has received a whopping 471.7 mm of rain in a span of 24 hours from 8:30 am on Tuesday. The state capital Shillong and Nongstoin have also recorded 168mm and 204 mm of rain, respectively. Another place in the state, Williamnagar has also received 142 mm of rain.
Mangan in Sikkim and Minicoy in Lakshadweep have also received 154 mm and 110 mm of rain, respectively during the same period.
According to weathermen at Skymet, good amounts of rain will be observed in the region for next 24 to 48 hours.