Bihar Rain Alert: Extremely Heavy Rainfall Warning as Deep Depression Intensifies

Current Weather Conditions: Bihar weather today shows active monsoon conditions with light to moderate rainfall across most districts on Friday, October 3, 2025. Weather in Bihar today features temperatures ranging from 25°C minimum to 30°C maximum with high humidity at 88-95% and overcast skies dominating the state.

Bihar temperature today remains 2-3°C below normal due to persistent cloud cover and rainfall activity. Current conditions show atmospheric pressure at varying levels with moderate winds from the southeast direction at 15-20 kmph, indicating active weather patterns across the region.

IMD Weather Alerts and Warnings

IMD rain alert in Bihar has issued comprehensive warnings with red alerts for multiple districts, expecting extremely heavy rainfall through the weekend. Bihar rain alert shows the most severe warnings for:

Red Alert Districts (October 3-4):

• West Champaran, Gaya, Kaimur - Extremely heavy rainfall (>20cm in 24 hours)

• East Champaran, Gopalganj, Siwan - Very heavy to extremely heavy downpours

Orange Alert Districts:

• Rohtas, Aurangabad, Nawada - Heavy to very heavy rainfall expected

• Sitamarhi, Sheohar, Saran, Buxar, Bhojpur - Heavy rainfall with thunderstorms

Yellow Alert: Covers all 38 districts with light to moderate rain and thunderstorm activity predicted.

Heavy Rainfall Forecast and Intensity

Heavy rainfall in Bihar is attributed to a deep depression over the west-central Bay of Bengal, located approximately 160 km off the Gopalpur coast in Odisha. IMD weather forecast for Bihar indicates this system is moving northward and will significantly impact the state through October 7.

Extended rainfall predictions:

• October 3: Extremely heavy rain in 3 districts, very heavy rain in 6 districts, widespread moderate to heavy showers elsewhere

• October 4: Red alert continues for West Champaran, East Champaran, Gopalganj, Sitamarhi, and Sheohar with very heavy rainfall in 11 districts

• October 5: Heavy to very heavy rain in Bhagalpur, Banka, Jamui, and 8 other districts

• October 6-7: Heavy rainfall continuing in northern and western districts, with gradual improvement expected

Weather System Analysis

Bihar weather update shows multiple meteorological factors contributing to the intense rainfall:

• Primary System: A deep depression over the Bay of Bengal is the main driver, bringing moist southerly winds toward Bihar

• Secondary Factor: An upper air cyclonic circulation at 1.5-3.1 km height over central Uttar Pradesh is enhancing rainfall activity

• Combined Impact: These systems together are causing widespread heavy to extremely heavy rainfall with thunderstorms, lightning, and gusty winds of 30-40 kmph across most districts

Impact and Disruptions

Bihar rains have already caused significant disruptions across the state:

Urban Flooding: Patna, Darbhanga, and Vaishali reported severe waterlogging on Thursday, affecting daily life and transport

Festival Disruptions: Heavy rainfall affected Durga Puja pandals and Ravana Dahan events on October 2, with some structures damaged in Patna

Agricultural Concerns: Continuous heavy rain poses risks to late-season crops and may cause waterlogging in agricultural fields

Transportation: Roads and highways face potential disruption, with authorities advising caution during travel

Weekly Weather Outlook

Bihar weekly weather forecast shows sustained wet conditions through early October:

• October 3: 86°F/77°F (30°C/25°C) with heavy showers and thunderstorms throughout the day

• October 4: Cloudy with heavy rain and humid conditions continuing

• October 5: Morning rain followed by occasional showers with temperatures 29-31°C

• October 6-7: Mostly cloudy with intermittent rain and gradual improvement in weather conditions

• October 8-9: Humid conditions with occasional rain and thunderstorms as weather patterns stabilize.

Safety Advisory

Bihar weather forecast includes critical safety warnings for residents:

• Lightning Safety: High risk of thunderstorms with lightning and gusty winds 30-40 kmph across the state

• Flood Precautions: Residents in low-lying areas and flood-prone zones are advised to remain alert for potential waterlogging

• Travel Advisory: Avoid unnecessary travel during intense rainfall periods, especially in rural and remote areas

• Agricultural Advisory: Farmers are advised to postpone field operations and secure livestock during the severe weather period

The current weather pattern represents one of the most significant post-monsoon rainfall events for Bihar, with the state experiencing almost continuous rainfall activity from September 30 through the projected period ending October 7.