Pre monsoon showers have begun..

Pre-monsoon showers have begun throughout the country including South Interior Karnataka.

Current satellite image showing thunderstorms over south and east India. coming weeks will see an increase in rainfall activity across the country - IMD / South Indian weatherman.

Outlook for the rest of the month looks very promising, heavy thundershowers expected along west coast and interior Tamil nadu and Karnataka reaching up to Telangana, Madhya Maharashtra and Madhya pradesh, to the east, West Bengal and the rest of NE states will receive heavy rainfall with possibility of squalls in the region.

The only region which will miss out is the east coast of the country from southern Tamil nadu through to Orissa.

Tamil nadu will also see the start of peak summer or 'Khattri' and temperatures are expected to reach into the mid 40's by mid May.

Heat wave regions of the last month should see temperatures fall by 2-3 degrees over the next week or so.



Next report (Monsoon onset report) in 3rd week of May.

Much needed April showers to begin shortly

The Much needed, eagerly awaited and long overdue April showers for 2016 over Bangalore and the rest of South Interior Karnataka will begin shortly.



With maximum temperatures hovering between 37 - 38 degrees over the city and minimums around 25 degrees there has been no respite from the sweltering heat even in the nights. 


These Vagaries when compared to last year when the city received over 200mm rainfall for the month of April alone make the heat feel much much worse.


However, some hope is around the corner, with a slight change in wind direction and the formation of a trough near the comorin area the coming days from the 19th onwards will see increase in clouds towards evening  / night. Wind speeds will also increase slightly during the evenings.


Isolated to scattered light thundershowers can be expected around South interior Karnataka from 19th April evening onwards.


An increase in thunderstorm activity is expected around the 21st - 23rd after which the thunderstorm activity will decrease again for a week or so to pick up again at the end of the month and beginning of May.


Total rainfall expected for April is around 80mm, slight reduction in minimum temperatures from 20th onwards.



Next update in first week of May

Start of Thunderstorm season & outlook for South west monsoon 2014

Thundershowers have begun over south and east India, Many places have received heavy rainfall over the last three days, thundershowers will continue for the next week or so before a break for about a week and then one more spell of thundershowers over most of peninsula India.

April and May rainfall is expected to be good over interior south of the country.


The only bad news coming in so far  from many international models is an impending el nino phase which will coincide with the onset of the south west monsoon. Rains so far are forecast to be between 70 - 80% of the LPA (long period average). Droughts are forecast for many parts of madhya maharashtra, madhya pradesh and North Andhra pradesh althought the North eastern states which missed out last year are forecast to get 100 - 110% of its LPA this year.


These numbers are based on preliminary forecasts from the meteorological departments in Australia, Europe and the US and could change as the monsoon draws near. 

the time has come. the south west monsoon will set in over kerala tomorrow the 31st of May.  IMD will take 24 hours more and declare the onset on 1 St of  June. rain is forecast for most of southern peninsula. Bangalore will get heavy showers on 1st and 2nd. Chennai on the 3rd. onset over Bangalore is the third.

Arrival of the South West Monsoon

The South West Monsoon has arrived over the Andaman and Nicobar islands. IMD will declare its onset within the next 24 hours. 

Two low pressures are forecast to come up on either side of the  peninsula within the next 72 - 96 hours and drag monsoon winds onto the mainland. However, the Arabian sea low is forecast to end up in Oman and could cause a delay of about 2 days in the onset over Kerala. The North-West of the country is heating up considerably and the annual Low pressure area will form over parts of Rajasthan and Madhya Pradesh, further strengthening Monsoon flows on the mainland. 

Expected date of Monsoon onset over Kerala is between 29th and 31st of May.

Cyclone Mahasen and the Onset of the Monsoon

As forecasted a cyclone formed in the bay which was named Mahasen. Mahasen is expected to make landfall between bakkhali in West bengal and chittagong in Bangladesh. Expected time of landfall is estimated between the morning - evening of the 16th of May. Mahasen is expected to strengthen for another 24 hours possibly reaching a maximum strength of T4.0 by Dvorak technique or category 2 on the saffir - simpson scale before it starts to recurve towards the North-East and weaken before making landfall as a deep depression.

 Rain/Drizzles From Mahasen is Expected along the east cost of India from Nagapattiam to Machilipattinam from the Night of 12th May 2013 to the Evening of 14th May 2013. Rain will be generated from localised Thundershowers as Mahasen pulls moisture and from bands of convection breaking off from the main system and hitting the coast. rainfall will move northwards along the coast as Mahasen makes its way north.

Pre-monsoon showers will continue over interior southern peninsula after the exit of Mahasen on the 17th.

SOUTH WEST MONSOON will reach Andaman islands by the 19th/20th of May 2013 aided by a possible low pressure near the east coast of Sri lanka. Some models also predict a Low pressure in the Arabian sea dragging monsoon winds over the mainland.