Posted 3rd November afternoon :

Low from the Bay has crossed over to the Arabian Sea (now AS 3):

Diwali weather Outlook for Mumbai & Pune: 

Mumbai: Rain may not play a spoilsport on Diwali day for Mumbai MMR... however some light rain in parts is likely in Mumbai MMR region over the weekend (6th & 7th November). 

Hence this Diwali, if we get some rain, humidity may dampen a few "Diyas' and the November " So called Mumbai coolness " may not be felt. 

Pune: This time, the cool and dry wintry feel will be missing during Diwali. Instead, there is a chance of light to moderate rain/Thundershowers from 4th till 7th November in and around Pune. Western Ghats region may get some moderate-heavy Thundershowers during this period. 

Satara, Sangli, Kolhapur, Sindhudurg, Ratnagiri and parts of Raigad district to also see rain/Thundershowers from today 3rd till 7th November.