Cyclone Arnab to Change Bihar Weather From October 28; Heavy Rain Alert in Several Districts
Patna: Bihar is likely to witness a significant change in weather conditions from October 28 as Cyclone Arnab over the Bay of Bengal moves towards the Andhra Pradesh coast. The weather system is expected to bring rain, thunderstorms, lightning and gusty winds to several parts of the state, with the possibility of heavy to very heavy rainfall in some districts.
According to weather reports citing the India Meteorological Department (IMD), rainfall activity is likely to intensify on October 29 and 30. The effects of the weather system may continue through October 31, with the possibility of further rainfall around November 1.
Cyclone Arnab: How Will Bihar Weather Change?
Cyclone Arnab is forecast to cross the Andhra Pradesh coast between Bapatla and Visakhapatnam around the morning of October 28 as a very severe cyclonic storm. The system is expected to influence weather conditions across eastern India, including Bihar.
Although the cyclone is expected to make landfall far from Bihar, changes in atmospheric conditions and increased moisture could trigger widespread rainfall, thunderstorms and strong winds across the state.
Wind speeds in Bihar could reach around 40–50 kmph in some areas, according to published weather reports. The much higher wind speeds forecast near the cyclone’s coastal landfall should not be confused with the expected conditions in Bihar.
District-Wise Rainfall Forecast for Bihar
The intensity and timing of rainfall are expected to vary across districts.
- October 28: Thunderstorms, lightning and gusty winds are possible in parts of southwestern, south-central and southeastern Bihar. Kaimur (Bhabua) and Rohtas are among the districts forecast to receive heavy rainfall.
- October 29: Heavy rainfall is possible at isolated locations across Bihar, accompanied by thunderstorms and gusty winds.
- October 30: Heavy to very heavy rainfall is forecast at isolated locations. East Champaran, West Champaran and Gopalganj may experience particularly intense rainfall, according to published forecasts.
- October 31 to November 1: Weather activity may continue in parts of the state, although the precise distribution and intensity of rainfall will depend on subsequent IMD updates.
Residents should check the latest district-wise warnings before travelling or planning outdoor activities.
Temperature May Drop After Rainfall
The expected rainfall could bring relief from relatively warm daytime conditions. Weather reports indicate that maximum temperatures may fall by around 2–4 degrees Celsius over the days following the onset of rain.
Cloud cover, rain and cooler conditions may make the weather feel more pleasant in some areas, although thunderstorms and strong winds could cause temporary disruption.
Impact on Daily Life, Transport and Agriculture
Heavy rainfall may lead to waterlogging in low-lying areas and disrupt road traffic. Thunderstorms and lightning could also pose risks to people outdoors, while strong winds may damage temporary structures, loose roofing materials and vulnerable trees.
Farmers may need to take additional precautions during the ongoing harvesting season. Rain could affect standing crops and harvested paddy left exposed in fields or open storage areas. Farmers should monitor local forecasts and protect harvested produce wherever possible.
Commuters and residents in areas under weather alerts should remain cautious, particularly during thunderstorms and periods of intense rainfall.
Safety Advisory: What Should Residents Do?
As the weather system approaches, residents are advised to:
- Follow official IMD and district administration weather alerts.
- Avoid open fields, isolated trees and exposed locations during thunderstorms.
- Stay away from electric poles, damaged power lines and waterlogged areas.
- Secure loose outdoor objects and temporary structures before strong winds arrive.
- Protect harvested crops and keep essential items safe from rain.
- Avoid relying on unverified social media posts for district-wise warnings.
The exact timing and severity of rainfall may change as Cyclone Arnab develops. Residents should follow the latest official forecasts for their district.
Disclaimer: This report summarises published weather forecasts available as of October 27, 2026. For current warnings and confirmed district-wise alerts, consult the India Meteorological Department and local authorities.