IMD warns of severe fog, cold wave and thunderstorms across multiple regions in India

India, as per the latest All India Weather Forecast Bulletin, is set to experience a diverse mix of intense weather conditions over the next several days, with the latest national forecast indicating thunderstorms in the Andaman & Nicobar region, persistent dense fog across the Northeast, and a continuing spell of cold wave conditions in central and east-central states.

The day-wise warnings issued for December 8 to 13 also highlight concerns for coastal regions, where squally winds over the Bay of Bengal and the Comorin area could disrupt marine activity.

Thunderstorms to persist over Andaman & Nicobar Islands

The Andaman & Nicobar Islands remain under thunderstorm watch for at least the first three days of the forecast period. From December 8 to 10, isolated places across the islands are likely to experience thunderstorms accompanied by lightning and gusty winds of 30–40 kmph.

The recurrence of storms suggests heightened atmospheric instability over the region, driven largely by moisture inflow from the surrounding seas and ongoing wind interactions.While the thunderstorms are expected to remain localised, the combination of lightning and gusty winds may temporarily disrupt ferry movement, outdoor activities, and flight operations to and from the islands. Residents and tourists have been advised to stay updated with local alerts, especially during afternoon and evening hours when convective activity tends to peak.

Cold wave tightens grip on central India

Cold wave conditions have returned to the core of the country, affecting states such as Chhattisgarh, Madhya Pradesh, Odisha and Vidarbha. These regions are expected to experience a noticeable dip in temperatures on December 8 and 9, with isolated pockets meeting the criteria for cold wave conditions.In western Madhya Pradesh, the situation is more pronounced, with cold day conditions likely to continue from earlier warnings.

A cold day is when the maximum temperature drops significantly below normal, often compounded by cloudy skies, fog or persistent northerly winds.According to the temperature outlook, west India will see a gradual fall of 2–3 degrees Celsius in minimum temperatures between December 8 and 10. This cooling trend is typical for the season, often linked to cold northwesterly winds descending into the plains following western disturbances.

After December 10, no significant temperature change is expected across the country. Other regions will likely maintain their current temperature profiles, with minimal variation in night-time and early morning readings.

Dense fog across the northeast and Himalayan foothills

Dense fog is set to become one of the most persistent weather hazards over the next few days, particularly in the Northeastern states of Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura.

The forecast indicates dense fog at isolated pockets from December 8 all the way through December 12, marking a near-continuous episode for the region.Foggy conditions are also expected in Himachal Pradesh, mainly on December 8 and 9, and parts of Odisha, especially on December 8.For travellers, especially those using early morning flights, train services or buses, the next several days may see delays, schedule disruptions or temporary suspensions.

Major airports such as Guwahati, Imphal and Agartala frequently experience operational challenges during dense fog events, and the ongoing spell is likely to add similar pressure.

Strong winds and marine hazards over Bay of Bengal and Comorin area

A significant marine warning has been issued for the southwest and adjoining southeast Bay of Bengal, where squally winds reaching 35–45 kmph gusting to 55 kmph are expected on December 8.On December 9 and 10, the squally weather is likely to intensify along and off the Tamil Nadu and Sri Lanka coasts, extending into the Gulf of Mannar and the Comorin area.

This presents a risk to small fishing boats, coastal operations and offshore activities. By December 11, the winds are likely to shift slightly, influencing the Comorin area and adjoining Maldives region.Fishermen have been advised to avoid venturing into affected seas, secure nets and equipment, and follow advisories issued by fisheries departments and coastal authorities.December 8

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As India moves deeper into December, the interplay of cooling temperatures, moisture-laden winds and shifting pressure patterns is set to create multiple weather challenges. From thunderstorms in island territories to persistent fog in the Northeast and cold wave conditions in central India, the week ahead calls for continued vigilance and adherence to official warnings. Authorities urge citizens to stay updated with real-time bulletins to remain prepared for rapid changes in weather conditions.