The pre monsoon showers in Mumbai were convective, and due to off shore trough. I mentioned , Nothing to do with AS-1.
As far as the system AS-1 goes, many models show it deepening, and moving west or NW or even North. Some models show otherwise.
I maintain my thinking that AS-1 will now move NW, from present location, and weaken off BEFORE hitting any landmass. In short, no major effect on land.
SWM will move up, due to the off shore trough prevailing, which will stretch from Konkan to Kerala.
Mumbai will continue to get "moderate" rains till Sun/Mon.
Vagaries shall advance SWM into Goa by Sat/Sun, (will wait for perfect OLR), and then into Mumbai.
SWM would move upto 20N, and then stagger for a few days due to the "mess" created by M4.
Pressure in the North today is 1004 ! Where is the gradient ??
These are my views, and things could happen either way..as many international models voice different opinions.