Follow Us:
Friday, May 29, 2020

From June this year, revised monsoon calendar for India

The monsoon onset and withdrawal dates have been updated for 11 states.

Written by Anjali Marar | Pune | Updated: April 15, 2020 9:23:29 pm
monsoon, new monsoon calender india, monsoon dates, indian express, weather news The existing dates were based on rainfall data from only 149 weather stations, and were formulated many decades ago. (File)

India Meteorological Department (IMD) Wednesday announced a revision in the onset and withdrawal dates of the southwest monsoon over 11 states covering 63 cities.

The desert state of Rajasthan has been found to experience more rainy days in recent years. Therefore, the monsoon arrival date stands preponed by nearly eight days, whereas withdrawal has been pushed 10–17 days beyond the normal date.

The new date for monsoon onset over New Delhi is now June 27, replacing the earlier date of June 23.

IMD considers the monsoon onset over Kerala on June 1 and commencement of withdrawal from parts of Rajasthan on September 1 as crucial. This year, while the Kerala onset date will remain unchanged, the date for monsoon withdrawal from Bikaner and Jaisalmer will not be before September 17.

The most number of cities getting new dates for onset and withdrawal — seven — are in Maharashtra, which will follow a new monsoon calendar from this year. The monsoon advancement over Mumbai, Pune, Nagpur, Kolhapur, Satara, Ahmednagar and Jalgaon will be as per the revised dates. The new normal date for monsoon arrival will be June 10 and the retreat has been pushed behind by nine days to October 11.

Over the last many years, it was noted that the onset of the Southwest monsoon was not as per the normal dates by the time it advanced and exited from the northwest, central and some eastern regions.

This, in turn, was directly affecting agriculture and water resource management in the country. With the revision coming into effect, these sectors can now plan to reschedule sowing, harvesting, reservoir stock management and dam water release efforts accordingly.

A team of experts from IMD, Pune, studied the crucial dates between 1961 – 2019. Based on this report, dates for Maharashtra, Gujarat, Madhya Pradesh, Chattisgarh, Telangana, Andhra Pradesh, Odhisha, Jharkhand, Chattisgarh, Bihar and some parts of Uttar Pradesh have been updated.

The existing dates were based on rainfall data from only 149 weather stations, and were formulated many decades ago.

“Over extreme northwest India, the monsoon advancement is earlier than the normal dates. It is now revised to July 8 instead of July 15,” said M Rajeevan, secretary, Ministry of Earth Science (MoES).

As like with monsoon advancement, variations in the commencement of monsoon retreat, especially over the extreme northwestern parts, was observed. This included parts of Punjab and Jammu regions, where the rain continued till mid-September.

“The withdrawal here is occurring 7 to 14 days later than the existing dates, which is a very appreciable change,” he added.

But the overall date of monsoon season’s complete withdrawal stands unchanged at October 15 from Kerala, said Rajeevan.

Revised State-wise Southwest monsoon

1) Onset date 2) Withdrawal date

# Kerala –

1) Thiruvananthapuram – June 1

# Tamil Nadu –

1) Chennai – June 4

# Karnataka –

1) Udupi – June 4

2) Gangawati – June 6

# Goa –

1) Panjim – June 7 (no change) // Oct 14

# Telangana –

1)Hyderabad – June 8 // Oct 14

# Andhra Pradesh –

1) Ongole – June 8

2) Machilipatnam – June 13

3) Vishakapattnam – June 11 // Oct 14

# Maharashtra –

1) Mumbai – June 11 // Oct 8

2) Pune – June 10 // Oct 11

3) Kolhapur – June 9 (no change) // Oct 11

4) Satara – June 10 // Oct 9

5) Ahmednagar – June 12 // Oct 8

6) Jalgaon – June 18 // Oct 6

7) Nagpur – June 15 // Oct 6 (no change)

# Chattisgarh –

1) Raipur – June 16 (delay by 3 days) // Oct 9

2) Jagdalpur – June 13 (delay by 4 days) // Oct 13

3) Bilaspur – June 16 (delay by 2 days) // Oct 7

# Jharkhand –

1) Jamshedpur – June 14 // Oct 10

# Odhisha

1) Cuttack – June 12 // Oct 13

2) Puri -June 13 // Oct 12

# Gujarat –

1) Ahmedabad – June 21 // Sept 30

2) Surat – June 19 // Oct 2

3) Bhuj – June 30 // Sept 26

4) Sunendranagar – June 26 // Sept 27

# Madhya Pradesh –

1) Bhopal – June 22 // Sept 30

2) Khandwa – June 20 // Oct 3

# Uttar Pradesh

1) Varanasi – June 20 // Oct 5

2) Lucknow – June 23 // Oct 3

3) Azamgarh – June 20 // Oct 3

4) Agra – June 30 // Sept 14

# West Bengal

1) Kolkata – June 11 // Oct 12

2) Siliguri – June 8 // Oct 12

3) Jalpaiguri – June 7 // Oct 12

# Bihar

1) Gaya – June 16 // Oct 8

2) Chhapra – June 20 // Oct 6

# Assam

1) Guwahati – June 4 // Oct 14

2) Tezpur – June 5 // Oct 14 (no change)

3) Diburgarh – June 4 // Oct 14 (no change)

# Mizoram

1) Aizwal – June 5 // Oct 14

# Tripura

1) Agartala – June 4 // Oct 14

# Meghalaya

1) Shillong – June 5 // Oct 14

# Manipur

1) Imphal – June 5 // Oct 15 (no change)

# Nagaland

1) Dimapur – June 4 // Oct 14

# Sikkim

1) Gangtok – June 10 (no change) // Oct 9

# Arunachal Pradesh

1) Itanagar – June 5 // Oct 14 (no change)

# Rajasthan

1) Ajmer – July 1 // Sept 21

2) Jaisalmer – July 8 // Sept 17

3) Dholpur – June 28 // Sept 29

4) Jaipur – July 1 // Sept 22

5) Bikaner – July 5 // Sept 17

6) Churu – July 4 // Sept 19

# Haryana –

1) Sonepat – June 30 (no change) // Sept 23

2) Bhiwani – July 3 // Sept 21

# New Delhi – June 27 // Sept 25

# Chandigarh – June 26 // Sept 22 (no change)

# Uttarakhand –

1) Pithorgarh – June 20 // Sept 28

# Himachal Pradesh –

1) Shimla – June 24 // Sept 24

# Punjab –

1) Jalandhar – June 28 // Sept 21

# Jammu and Kashmir –

1) Jammu – June 28 // Sept 20

2) Srinagar – June 22 (no change) // Sept 24

3) Ladakh – June 23 // Sept 23

📣 The Indian Express is now on Telegram. Click here to join our channel (@indianexpress) and stay updated with the latest headlines

For all the latest India News, download Indian Express App.

0 Comment(s) *
* The moderation of comments is automated and not cleared manually by indianexpress.com.
Advertisement
Advertisement
Advertisement
Advertisement