On Wednesday, Oct. 28, Cyclone Arnab slammed the Andhra Pradesh‑Yanam coast, dumping more than 200 mm of rain in a single day and knocking out power to 3 million households. The IMD now warns that the same moisture will spill over to East Uttar Pradesh, Haryana, Chandigarh, and Delhi on Thursday and Friday, with 70‑km‑h gusts expected over the capital and its suburbs.
The bulletin cites a western disturbance that is sucking the cyclone’s moisture northwards, turning the monsoon trough into a breeding ground for thunder‑showers. Forecast models predict isolated hail and localized heavy downpours, especially over the industrial belt of Delhi‑NCR where rooftop drainage already struggles.
In Delhi, the daily forecast lists a 26‑28 °C maximum and a 16‑18 °C minimum, a clear dip from the 30‑32 °C average. Residents in the Shivaji Park area have reported sporadic power cuts as the storm surges over the weakly designed utility grid.
The warning extends beyond the capital: East Uttar Pradesh and West Bengal will see similar rainfall from Oct. 28‑30, while Odisha and Jharkhand are slated for heavy showers until Nov. 3. The IMD recommends that local emergency services keep shelters ready.
Meteorologists will issue a new bulletin every 12 hours until Nov. 3, as the western disturbance weakens. The Department has called for the Central Pollution Control Board to monitor air quality, as heavy rains often lead to flash flooding and waterborne illnesses.
The next step is clear: authorities in Delhi and Haryana are expected to activate the state disaster management plan by Friday night, ensuring that ambulances and flood‑control crews are on standby should the thundersqualls intensify.