IMD forecasts moderate rain over Tamil Nadu Western Ghats for next 48 hours
Synopsis
A low-pressure trough stretching from southern Gujarat to central Kerala is pushing moderate rain and thunderstorm risk into Tamil Nadu's Western Ghats over the next 48 hours — while Chennai stays warm, humid, and largely dry. With temperatures running 2-3°C above normal across the state, the IMD is urging hilly-district residents to stay alert for landslides and lightning.
Key Takeaways
The IMD has forecast moderate rainfall over Tamil Nadu's Western Ghats districts for the next 48 hours from 8 July .
Thundershowers with lightning and gusty winds are likely at isolated locations in the hilly districts.
A low-pressure trough from southern Gujarat to central Kerala is the driving weather system.
Chennai is expected to remain cloudy but largely dry, with only isolated light showers possible.
Maximum temperatures in Tamil Nadu, Puducherry , and Karaikal may run 2-3°C above normal .
Residents in landslide-prone hilly areas have been advised to avoid unnecessary travel during heavy showers.
The India Meteorological Department (IMD) has forecast moderate rainfall over the Western Ghats districts of Tamil Nadu on Wednesday, 8 July, with one or two places likely to experience thundershowers accompanied by lightning and gusty winds over the next 48 hours. The weather system is being driven by a low-pressure trough extending from southern Gujarat to central Kerala, according to the IMD's latest bulletin.
Key Developments
The IMD has indicated that unstable atmospheric conditions are expected to prevail over the hilly districts of Tamil Nadu's Western Ghats zone during this period. Authorities and residents have been urged to remain on alert, particularly in areas vulnerable to landslides and localised flooding.
For the rest of Tamil Nadu and the Union Territory of Puducherry, only light rainfall at isolated locations is anticipated. Brief spells of showers remain possible in several districts due to localised weather conditions, though widespread heavy rain is not expected beyond the Ghats.
Chennai and Coastal Areas
In Chennai and its suburban areas, skies are likely to remain generally cloudy over the next two days. However, no significant rainfall is expected in the city, with only isolated light showers possible in some localities. Daytime conditions are forecast to remain warm and humid despite the cloud cover.
The IMD has also warned that maximum temperatures across several parts of Tamil Nadu, Puducherry, and the Karaikal region are likely to remain above normal by 2 to 3 degrees Celsius. The combination of elevated temperatures and high humidity is expected to result in uncomfortable conditions, particularly in coastal and interior plains.
What Is Driving the Weather
Meteorologists attribute the current pattern to the low-pressure trough stretching from southern Gujarat to central Kerala, which is channelling moisture transport over southern India. This system is creating favourable conditions for rainfall over the Western Ghats while limiting precipitation in other parts of the state — a pattern consistent with early southwest monsoon behaviour over peninsular India.
Safety Advisories
Residents in hilly districts have been advised to exercise caution during thunderstorm activity and avoid unnecessary travel through landslide-prone areas if heavy showers develop. The IMD has specifically urged people to take precautions against lightning and strong winds. The department said it will continue to monitor the evolving weather pattern and issue updated forecasts or warnings if conditions change significantly in the coming days.
Point of View
But the underlying risk in Tamil Nadu's Western Ghats is not trivial — these districts have seen recurring landslide incidents during monsoon seasons when moderate rain combines with already-saturated slopes. The low-pressure trough driving this spell is the same system influencing moisture patterns across peninsular India, which means forecast uncertainty is higher than usual. The above-normal temperature signal alongside rain is also worth watching: heat-humidity combinations in coastal Tamil Nadu can stress vulnerable populations even when rainfall headlines dominate. Local administrations in Nilgiris, Coimbatore, and Tirunelveli districts would be wise to pre-position response teams rather than wait for red alerts.
NationPress
8 Jul 2026
Frequently Asked Questions
Which districts in Tamil Nadu are expected to receive moderate rain?
The IMD has forecast moderate rainfall over the Western Ghats districts of Tamil Nadu, which include hilly areas such as the Nilgiris, Coimbatore, and Tirunelveli regions. One or two places in these districts may also experience thundershowers with lightning and gusty winds over the next 48 hours.
What is causing the rain over Tamil Nadu's Western Ghats?
A low-pressure trough extending from southern Gujarat to central Kerala is channelling moisture over southern India, creating favourable conditions for rainfall over the Western Ghats. This system is limiting significant precipitation in the plains and coastal areas of Tamil Nadu.
Will Chennai receive heavy rain in the next two days?
No significant rainfall is expected in Chennai over the next 48 hours. The city's skies are likely to remain cloudy, with only isolated light showers possible in some localities, while daytime conditions stay warm and humid.
Are temperatures expected to be above normal in Tamil Nadu?
Yes, the IMD has forecast that maximum temperatures across several parts of Tamil Nadu, Puducherry, and the Karaikal region are likely to remain 2 to 3 degrees Celsius above normal, adding to heat-humidity discomfort especially in coastal and interior plains.
What precautions has the IMD advised for residents?
The IMD has advised residents in hilly districts to avoid unnecessary travel through landslide-prone areas if heavy showers develop, and to take precautions against lightning and strong winds during thunderstorm activity. The department has said it will issue updated warnings if conditions change significantly.
