A high pressure ridge runs from Gujarat thru Rajasthan/Sindh into Northern regions.
The fresh WD , N-2, approaching Northern Sub-Continent is to be affected by the current ridge across the region.
The WD, currently as a trough along the 50E line, is seen precipitating in the Persian Gulf area. Moving into Dubai tomorrow.
Will approach the Pakistan Northern regions by Wednesday 21st. and into North India by Thursday, 22nd. In all probability the encounter with the ridge will make it track Ne into the Northern states of Pakistan and India.
It can bring cold days in the region due to cloudy conditions. Rain/snow in Kashmir/HP and Utterakhand hills on 23rd/24th. Middle ranges of Gulmarg/Pahalgam and Sonmarg can get snow.
Partly cloudy weather for Delhi NCR on Wednesday/Thursday.
An Easterly wave aloft at 850 hpa, in the Southern Bay, moving in westwards would be energised by the ensuing pulse in the Eastern Bay.
Would form a trough along the 10N line by Tuesday.
The remnants of BB-11, by then at 1008 mb,( or maybe as an UAC), can merge into the trough, thus sort of energising it (the trough).
Rainfall from the merger will bring relief to TN coast from Wednesday/Thursday. CAPE is seen increasing off the TN coast by Thursday.
Chennai will get some showers on Wednesday night or Thursday.
Mumbai City will see a minimum of 21c and Scruz a minimum of 16/17c on Tuesday morning. However the day temperature in the city/suburbs will rise to 33c with East winds.
Kolkata dry with NE winds turning North by Wednesday. Drop in temperatures from Thursday morning. Misty on Friday morning.
Pakistan: Karachi which saw a high of 31c, still remains at around 19c in the night.
Karachi, Hyderabad (Sindh) and Sukkur will see the nights cooling down as N-2 passes by Thursday. Expect 15/16c in Karachi and 12/13c in Hyderabad.