How Mumbai Flooding began
A low pressure area developed over southern coastal Odisha and adjoining northwestern Bay of Bengal on August 27, 2017. It moved over to the central parts of Odisha and neighbouring areas on August 28.
It was seen as a well marked low pressure area over south western Madhya Pradesh and neighboring areas on August 29 and over central parts of Gujarat and neighbouring areas in the morning of August 30, 2017.
INSAT Picture of August 29, 2017
The system brought heavy to very heavy rainfall with extremely heavy rainfall occurring in the North Konkan and Gujarat Region.
Mumbai, which saw rains bringing the city down to its knees in 2005, is set to receive heavy showers in the next 48 hours. The disaster management team and Brihanmumbai Municipal Corporation (BMC) are on alert and water logging has been reported in several parts of the city.
Mumbai Police has also issued an alert stating that heavy water-logging is expected in the next few hours due to heavy showers and high tide. The police have advised the city dwellers to check their route before venturing out. Due to heavy rains, trains on the western line have been suspended.
Strong winds and heavy rain hit operations at the Chhatrapati Shivaji International Airport (CSIA), which reported average delays of around 35 minutes. Airport officials said a few flights have been diverted due to Mumbai flooding to other locations and others asked to ‘go-around’ or delay landing.
Dr. Ajit Tyagi, Air Vice Marshal (Retd) and fmr DG, IMD, in a conversation with a G’nY correspondent said,“No doubt there was enough indication of heavy rainfall over the region, but the moot point is that could we have given specific warning the previous evening to administrators and the general public in Mumbai not to venture out on Tuesday or a warning in the morning to rush back to home well in time?”.
He further added, “Definitely we need more than just forecast of heavy rainfall which happens on many days during monsoon season. Can meteorologists/forecasters and disaster managers develop a warning/alert system for heavy rainfall similar to cyclone warning? With the improvement in the skill of short range forecasts, it should to be doable with lead time of 24 to 36 hours. Of course it has to take into consideration location specific short range rainfall forecast, vulnerabilities and associated risks. I am sure it can be attempted.”
INSAT and RADAR picture of August 30, 2017
Source: Hindustan Times
More that 331.4 mm rainfall occurred during the past 24 hours ending at 0830 hours IST of August 30, 2017.
The highest 24 hours rainfall record at Mumbai (Santacruz) 346.2 mm (23 August,1997).
The present rainfall at Mumbai as per the IMD records ( Colaba):111.0mm. The other stations received heavy to very heavy rainfall are: Palghar-280.0, Thane-247.0, Pen-200.4, Mathern-185.4, Vasai-143.0, Bhira-140.0, Sudhagad-130.0, Ulhasnagar-127.0, Khalapur-115.7
Forecast for Next 24 Hours:
Rainfall is predicted to decrease gradually during the next 24 hours and a reign in Mumbai flooding.
NCMRWF Model forecast issued on 25th August 2017 for 29th & 30th August 2017