Mumbai regardless of the India Meteorological Division’s (IMD) ‘orange’ alert, indicating a powerful probability of ‘heavy to very heavy rain’ at remoted locations on Monday, the S-band doppler climate radar (DWR) in Colaba has remained inoperative for the final 4 days.
This isn’t the primary time the DWR, which was put in within the metropolis in 2010 for surveillance climate of as much as 400km from the shoreline, has remained defunct. Final yr too, the radar was inoperative on June 9, when the southwest monsoon made an early entry into Mumbai.
On December 4, 2017, when Cyclone Ockhi brushed previous the Mumbai coast, the radar was not practical. The DWR, which is instrumental in forecasting climate circumstances, additionally did not work on a number of days throughout excessive rainfall occasions in June and July 2019, and likewise on June 1, 2020, about 48 hours earlier than cyclone Nisarga made landfall in Maharashtra.
A spokesperson with the IMD’s regional forecasting middle in Mumbai stated that the doppler radar at Colaba is down for routine upkeep.
In the meantime, the newly-commissioned C-band radar in Veravalli close to Jogeshwari has been producing pictures at an interval of about an hour, which consultants stated is inadequate from a catastrophe administration viewpoint.
“Actual-time monitoring of clouds and rainfall over Mumbai-MMR through the monsoon season is an especially necessary a part of catastrophe administration. A doppler climate radar offers excellent details about clouds, their motion, and rainfall on a real-time foundation. The dense community of rain gauges and public CCTVs in Mumbai dietary supplements this surveillance course of. It can’t be a substitute for a fully-working radar, which produces pictures at an interval of 10-Quarter-hour throughout lively monsoon,” stated Akshay Deoras, impartial meteorologist and PhD candidate on the College of Studying, UK.
MS Reddy, former vice-chairperson of the Nationwide Catastrophe Administration Authority (NDMA), stated there was a urgent must have no less than two correctly working DWRs within the metropolis. “Mumbai as a metropolis is turning into more and more vulnerable to city flooding, particularly due to recurring high-intensity short-duration rainfall occasions. DWRs give us a lead time of three to 6 hours and inform us the temporal and spatial variation of rainfall for various areas. These are essential particulars, particularly for warning commuters or shifting individuals from low-lying areas,” stated Reddy.
In the meantime, though the official date for the onset of southwest monsoon was June 11, town has seen patches of rainfall over the previous couple of days. The primary low-visibility downpours occurred in remoted areas early Sunday. To date this month, Mumbai has seen 115.3 mm of rain, indicating a deficit of 167.3 mm for the month to date.
Nevertheless, heavy downpours are anticipated within the metropolis on Monday. “Residents are suggested to take precautions whereas stepping out on Monday. The town might get round 130 mm of rainfall over the subsequent two or three days, which isn’t alarming by Mumbai requirements, but it surely may trigger waterlogging,” stated the IMD spokesperson.