Southwest Monsoon advances into most parts of Northeast

Guwahati: Southwest monsoon has set in over Kerala and advanced into most parts of northeast India including the entire Nagaland, Manipur, Mizoram, Arunachal Pradesh and most parts of Tripura, Meghalaya and Assam on Thursday.

The Southwest monsoon has advanced into remaining parts of southwest Arabian Sea, some parts of west-central Arabian Sea, most parts southeast Arabian Sea and Lakshadweep area, most parts of Kerala, Mahe, some parts of south Tamil Nadu, remaining parts of Maldives and Comorin area; some more parts northeast Bay of Bengal, most parts of northeast India including entire Nagaland, Manipur, Mizoram, Arunachal Pradesh and most parts of Tripura, Meghalaya and Assam.

Thus, Southwest monsoon has set in over Kerala, on May 30.

The Northern Limit of Monsoon passes through 13°N/60°E, 12°N/65°E, 11°N/70°E, Amini, Kannur, Coimbatore, Kanyakumari, 8.5°N/80°E, 13°N/84°E, 16°N/87°E, 20°N/91°E, Agartala, Dhubri, 27°N/89.5°E.

Conditions are favourable for further advance of the Southwest monsoon into some more parts of central Arabian Sea, remaining parts of south Arabian Sea, Lakshadweep area and Kerala, some parts of Karnataka, some more parts of Tamil Nadu, Southwest and Central Bay of Bengal, remaining parts of Northeast Bay of Bengal and Assam and Meghalaya and some parts of Sub-Himalayan West Bengal and Sikkim during next the two-three days.

A cyclonic circulation lies over northeast Assam and neighbourhood in lower tropospheric levels.

Strong southwesterly/southerly winds are prevailing from the Bay of Bengal to northeastern States in lower tropospheric levels.

Under its influence:

• Fairly widespread to widespread light to moderate rainfall accompanied by thunderstorms, lightning & gusty winds (30-40 kmph) likely over Arunachal Pradesh, Assam & Meghalaya, Nagaland, Manipur, Mizoram & Tripura and Sub-Himalayan West Bengal & Sikkim during next 7 days.
• Isolated heavy/very heavy rainfall is very likely over Arunachal Pradesh, Assam and Meghalaya, Sub Himalayan West Bengal and Sikkim during the next five days and isolated heavy rainfall over Nagaland, Manipur, Mizoram and Tripura on May 30 and 31. 
• Moreover, isolated extremely heavy rainfall is also likely over Meghalaya on Thursday.