Thursday, August 31, 2023

Monsoon this August...2023

Mumbai:

Mumbai had a dry August After a nearly record rainfall in July. By end of  July, Mumbai Santacruz had received 92% of the seasonal rainfall.

In August, Santacruz measured 177 mms of rain , 31% (normal 562), and Colaba 112 mms 24% ( normal 472 mms).

So, though SantaCruz normally gets 24% of the seasonal rain in the month of August,  this year received 13% of the seasonal total in August. .

Lakes:

The Mumbai lakes and dams level reported at 6 am on 30th August 2023 is 1308021 ML (90 %).

Last year on 30th August 2022 was 1404404 ML (97 %).

In the year 2021 on 30th August 2021 was 1276377 ML (88 %).

40 days of Monsoon still remain. 

Pune: Pune received only 42 mms in August,  25% of the normal August rainfall. 

Pune region dams and reservoirs are today at 69.72%.

All Maharashtra dams and reservoirs are at 64.37%

Maharashtra August Rainfall: Yellow = Deficit, Red = Large Deficit

Bangaluru: The driest August on records since observations began. 12.4 mms in 2023, lowest record 20.6mms in 1885 !

It will be listed as one of the 'driest' months since 1901. There will be a deficiency of about 36% of rainfall in August 2023.


August 1899 has been the driest August,  at -40.4%, since reliable records began in 1871

Compilation of recorded by Vag.Vineet👇

After 1900.. During the period 1901-2023: Top 10 driest August for India

1. 2023: 162.7 mm ( -36%)
2. 1913: 189.8 mm
3. 2005: 190.1 mm
4. 1920: 190.8 mm
5. 2009: 192.5 mm
6. 2021: 196.2 mm
7. 1993: 198.8 mm
8. 1979: 199.3 mIm
9. 1902, 1905: 202.6 mm
10. 2015: 204.2 mm

During the period 1901-2023: Top 10 wettest August for India
1. 1926: 348 mm
2. 1958: 328.7 mm
3. 1933, 1963: 328.2 mm
4. 2020: 327 mm
5. 1988: 325.1 mm
6. 1976: 319.5 mm
7. 1970: 319.3 mm
8. 1931: 318.9 mm
9. 1916: 318.8 mm
10. 1955: 317.2 mm

For the period 1901-2022, August rainfall in the country is decreasing at the rate of 0.7mm/decade.

This year, throughout the month, break monsoon conditions prevailed for nearly 24 days. 

It is the month of September that holds the key to making or breaking the year. Although this month has a modest average of 167.9mm rainfall, it is considered the most volatile to change fortunes.

September assumes  importance. If the month receives its normal rainfall or even a modest shortfall of about 10%, the season can avert the drought scare.

Any deficiency, in excess of 15% rainfall will push it closer to yet another El Nino-driven ‘drought’.


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