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Former Cyclonic Storm Daye to bring new flood threat to eastern, northern India into the weekend

By Eric Leister, AccuWeather senior meteorologist
September 21, 2018, 8:41:12 AM EDT

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Former Cyclonic Storm Daye will bring another surge of rainfall to parts of eastern and northern India through Friday night.

Daye become the first named storm in the Bay of Bengal so far this year. The cyclone has since weakened to a deep depression after moving inland across northeast India.

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The depression will continue to bring heavy rainfall as it tracks slowly northwestward across the northern half of the country.

As the storm continues to move toward the northwest, heavy rainfall will spread into Chhattisgarh, eastern Madhya Pradesh and southeast Uttar Pradesh on Friday.

Daily rainfall amounts up to 200 mm (8 inches) will be possible in the hardest hit areas, which could result in life-threatening flooding and an increased risk for mudslides in areas of rugged terrain.

In the city of Digha in Odisha, over 250 mm (9 inches) of rain reportedly fell from Thursday evening through Friday. Rainfall reports ranged from 60-130 mm (2-5 inches) along coastal areas of eastern India.

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These downpours will continue to shift west and northwest into this weekend, targeting areas from western Madhya Pradesh into eastern Rajasthan, western Uttar Pradesh, Uttarakhand and Haryana.

This will put the entire National Capital Region and New Delhi at risk for flooding downpours.

Rainfall amounts of 25-50 mm (1-2 inches) will be common with local amounts over 100 mm (4 inches)

This surge of rainfall will prolong the official monsoon season several weeks more than normal in parts of northwest India.

The official withdrawal of the monsoon is expected to begin next week, roughly two to three weeks later than normal across the region.

A separate area of concern will be along the west coast of India from near Mumbai southward to Goa and the northern coastline of Karnataka.

Downpours will slowly shift southward along the coast from late Wednesday into Saturday bringing localized flooding and travel disruptions.

The heaviest rainfall is expected to remain north of Kerala where the worst flooding in decades killed more than 400 people in August.

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