Archive · 20 Sep 2026
Kolkata Faces Yellow, Orange Alerts as Bay System Intensifies
A weather system is growing stronger over the Bay of Bengal.
It may become a depression on Monday.
This could bring heavy rain, thunderstorms and strong winds to West Bengal from September 21 to 26.
Kolkata has a yellow alert first, followed by an orange alert.
Some districts in South Bengal may get heavy rain beginning September 22.
Rain will also increase in north Bengal, especially around Jalpaiguri and Darjeeling.
The sea may become dangerous because of strong, gusty winds.
Fishermen have been told to stay away from the deep sea and return to shore if they are already there.
The India Meteorological Department expects the Bay of Bengal low-pressure area to intensify into a depression on Monday.
West Bengal is forecast to receive heavy rain and squally weather from September 21 to 26.
Kolkata is under yellow alert on September 21-22 and orange alert from September 22-26.
Several South Bengal districts may receive heavy rain, while north Bengal rainfall is expected to increase from September 22.
Fishermen have been advised to avoid the deep sea from September 21 and West Bengal’s coast from September 22-25.
- Who
- The India Meteorological Department issued the forecast; residents and fishermen in West Bengal are affected.
- What
- A low-pressure system may intensify into a depression, bringing heavy rain, thunderstorms and squally winds.
- When
- The weather system is expected to affect the region from September 21 to 26, with intensification likely on Monday.
- Where
- The system is over the east-central Bay of Bengal and adjoining north Andaman Sea, affecting Kolkata, West Bengal and nearby coastal waters.
- Why
- The low-pressure system is strengthening over the Bay of Bengal, creating conditions for heavier rain and stronger winds.
- Kolkata alerts
- Yellow alert on September 21-22; orange alert from September 22-26.
- Expected rainfall period
- Heavy rain and squally weather are forecast across West Bengal from September 21 to 26.
- South Bengal rainfall
- Isolated areas may receive 7-11 cm of rain from September 22.
- North Bengal rainfall
- Jalpaiguri could receive 7-20 cm of heavy to very heavy rain on September 25.
- Strongest forecast winds
- Winds may reach 55-65 kmph, gusting to 75 kmph, over parts of the Bay of Bengal on September 23-24.
- Fishermen’s advisory
- Avoid the deep sea from September 21 and the West Bengal coast from September 22-25; those already at sea should return by the night of September 21.