Revision as of 10:22, 1 August 2023

This page is under construction. Data will continue to be added over the next several years.

A waterlogged street in Mumbai’s Khar on 9 July 2018
-Heavy weekend rains in the Maximum City continued into Monday 9 July. The deluge delayed train services, wrought traffic havoc, and caused city-wide waterlogging. But despite the downpour, Mumbai kept to its feet with water receding faster than usual and its lifeline — the local train — running on all four routes, albeit with delays.
Photo: SL Shanth Kumar, The Times of India

See picture, 'A waterlogged street in Mumbai’s Khar on 9 July 2018'

13 July 2018 at Delhi’s Minto Bridge
Water accumulating under 13 July 2018 at Delhi’s Minto Bridge has been an almost- annual feature for several decades now.
Photo: Piyal Bhattacharjee
From [ The Times of India ]

See graphic, '13 July 2018 at Delhi’s Minto Bridge '

Coolest July days

Delhi

Maximum

24.9 degrees Celsius, 2014/ July 30

26.5 degrees Celsius: 2021/19 July , eight degrees below normal, with Over 100mm rainfall in 24 hrs

Hottest July days

Delhi

43.5°C on July 2, 2012

43.1°C on July 12021; six degrees above normal at the base observatory (Safdarjung) . (Mungeshpur Delhi 45.2°C; Pitampura t 44.3°C; Najafgarh (44°C). This was the third consecutive day of an unusual late June/ early July heatwave in the city. The city recorded a heatwave in July for the first time after 2014.

Rainfall

Definitions

Rainfall in one day

between 115.6mm and 204.4mm is considered very heavy;

between 64.5mm and 115.5mm heavy; and

between 15.6mm and 64.4mm moderate.

Delhi

Long-period average

Rainfall: the long-period average for July is 209.7mm

The wettest Julys

2000-23

At Safdarjang, Delhi

632.2mm in 2003, the highest in recorded history

507. 1mm in 2021

384.6mm in 2023

340.5mm in 2013

...

286.3 mm in 2022

...

187.3 mm: the norm for July

2015-19

Rainfall in Delhi in July, 2015-19
And till 6 July 2020.
From: Jasjeev Gandhiok, July 7, 2020: The Times of India

See graphic:

Rainfall in Delhi in July, 2015-19
And till 6 July 2020.

Heavy rain days

Delhi

Kushagra.Dikshit / Wettest July day in 20 years floods city roads, stalls traffic/ roi/ 9 July 2023

133. 4mm July 10, 2003 in a span of 24 hours

126. 1mm July 8, 2023 in a span of 9 hours

Wettest days, 1958 – 2023 / 100mm rainfall on two consecutive days

Priyangi.Agarwal/ CAPITAL FLOATS!/ The Times of India/ July 10, 2023

Highest 24 hour rainfall in July in Delhi, 1958 – 2023
this graphic was created on the 9th July 2023

2023: In a rare occurrence, Delhi recorded over 100mm of rainfall on two consecutive days. Safdarjung, the city’s base station, logged 153mm in 24 hours till 8. 30am on [7-8 Jul]. However, it again received 105. 8mm between 8. 30 am and 5. 30 Prophet Muhammad [on 9 July]. The two days of heavy rain helped Delhi surpass the normal mark for the entire July.

The torrential rain impacted movement of 34 trains, with 18 of them being cancelled.

According to the India Meteorological Department, this was

Delhi’s wettest July day in 41 years.

It was also the third highest single-day rainfall in July since 1958. ‘

Between 1958 and 2023 in July,

266. 2mm of rainfall was recorded in 1958 and

169. 9mm in 1982.

Met department’s data showed that the city did not record two consecutive ‘heavy’ rain spells in July in at least 10 years.

However, September 2021 saw two days in a row when over 100mm of rainfall was recorded [on each day]. On September 1 and 2 in 2021, Safdarjung received 112. 1 and 117. 7mm, respectively.

In July 2022, the city had logged 286. 3mm in the entire month.

However, July 2021 received 507. 1mm.

Jaipur

Highest single-day rainfall

326 mm, 1981, July 19

…

160mm rainfall 2023, July 29

Maharashtra

Mahabaleshwar (Satara district)

594.4mm rainfall in 24 hours 2021 July 23

490.7mm on 2008, August 11

Hugh rainfall but not records:

482mm on 2021 July 21

461mm on 2021 July 22

Mumbai

Annual rainfall average

2,318 mm

The wettest Julys

1,512. 7 mm, July 2023

1,502. 6 mm July 2020.

1,454. 4 mm July 2005 (944 mm of rainfall in a single day: the 26/7 deluge)

July (general)

Bengaluru

Low rainfall, high temperatures, June- July 2017

Bengaluru June July rainfall 2017

Bengaluru sees warm days in wet season

BENGALURU,JULY 25, 2017 00:00 IST

The city is witnessing unusually hot days for the monsoon season, with the maximum temperature going two degrees above normal on Sunday and Monday.

Officials of the India Meteorological Department (IMD), Karnataka, said the normal maximum temperature in Bengaluru for this time of the year is 28C. “But, the temperature crossed 30C on -24, 25 July],” said S.M. Metri, Director, IMD Karnataka.

The highest maximum temperature the city has experienced in July is 33.3C in 1914 and 1926. Bengaluru has consistently recorded some of the highest maximum temperatures in the last three years; 30.7C in 2016, 31.6C in 2015, and 31.3C in 2014.

Deficient rainfall

The high temperatures come even as the city faces a -56% deficiency in rainfall from June to date. While the normal rainfall for Bengaluru urban is around 141 mm, the city has received only 61 mm rainfall so far.

Gujarat rainfall

2013, 2017: very high rainfall

Gujarat floods: The rainiest monsoon of the decade| TNN | Jul 26, 2017 | The Times of India

July 2017 saw the most rainfall for any July in the last decade.

Gujarat has received 408mm in July (till July 25) the most rainfall received in July in the last decade.

Eight districts have received more than 70% rains of their average annual rainfall.

Monsoon 2017 had the highest amount of rainfall seen till July 25 in the last decade. The state has received around 534.40mm, about 17mm more than in 2013, which had seen the most rainfall till July 25, in the last decade.

This July saw the most rainfall for any July in the last decade. The state has received 408mm in July (till July 25) the most rainfall received in July in the last decade. The average rainfall for Ahmedabad in July is 299mm. In the 25 days of July 2017 so far, Ahmedabad has received 397mm of rain.

The data further reveals that the apart from 2013 — when the state received 517.69 mm of rain till this point—the state did not more than 400mm of rain till July 25 in the last decade. Officials said that with August and September months still to come, four districts — Banaskantha, Morbi, Surendranagar and Patan — have received more than 100% of their annual rainfall figures. Eight districts have received more than 70% rains of their average annual rainfall.

There are 33 districts in the state.

Officials said that of state's 250 talukas, 35 have received more than 100% of their average seasonal rainfall. Dantiwada has had the highest rainfall in percentage terms. Dantiwada taluka in Banaskantha has received 1,359mm of rain, against its seasonal average rainfall of 578mm.

Officials said of the 250 talukas, 18 taluka have received more than 1,000mm of rain and 98 have received between 501 and 1,000 mm.

1st July

2nd July

Delhi, 21.8mm rain, followed by dry week; 2018

Enjoy the wet spell till today, then brace for a dry week ahead

Strong showers lashed the capital in the evening, bringing the mercury down by several notches. Till 8.30pm, Safdarjung received 21.8mm rainfall, while Palam recorded 35.4mm, said Met officials. The rain affected operations at IGI Airport as 24 inbound flights were diverted between 8.45pm and 9.45pm.

Delhi’s maximum temperature was recorded at 37.8 degrees Celsius on Monday, one degree above normal. In the evening, the rain, along with strong wind, brought the temperature down to around 30 degrees Celsius. Delhi’s humidity levels oscillated between 50% and 70%.

3rd July

4th July

5th July

6th July

7th July

8th July

Delhi, 40.1°C/ Humidity 60%; 2018

2018: The temperature went soaring around the capital. with the maximum being recorded at 40.1° C at Safdarjung — three degrees above normal for this time of the season. Ayanagar was the hottest location in Delhi on Sunday, recording a maximum of 41.2° Celsius, while Palam had a high of 41.1° Celsius — both four notches above normal. Humidity levels were also on the higher side, hovering around 60%,

9th July

Mumbai, Heavy rains, 2018

A waterlogged street in Mumbai’s Khar on 9 July 2018
-Heavy weekend rains in the Maximum City continued into Monday 9 July. The deluge delayed train services, wrought traffic havoc, and caused city-wide waterlogging. But despite the downpour, Mumbai kept to its feet with water receding faster than usual and its lifeline — the local train — running on all four routes, albeit with delays.
Photo: SL Shanth Kumar, The Times of India

See picture, 'A waterlogged street in Mumbai’s Khar on 9 July 2018'

Delhi, 40.1 °C/ only 4mm rainfall; 2018

2018 Rain likely to bring relief from heat

The capital witnessed light rain in some parts, even as humidity levels continued to remain high throughout the day.. Delhi’s maximum temperature was recorded at 40.1 degrees Celsius on Monday — four notches above normal for this time of the season.

Monday’s rainfall activity primarily affected west and parts of south Delhi, while places like Safdarjung, Palam and Ayanagar recorded no rainfall. The Palam weather station recorded 4mm of rainfall till 5.30pm in the evening, officials said.

10th July

11th July

Delhi, 36.7°C mx, Humidity 60> 80 %, no rainfall; 2018

2018 Overcast day but rain plays truant again

Drizzle activity was recorded in western and southern parts of the city. The capital saw overcast skies throughout the day, resulting in the mercury falling to a maximum of 36.7° C as compared to a high of 39.1° C on Tuesday..The hottest location was Palam, which recorded a maximum of 38° C. Humidity levels, meanwhile, oscillated between 60 to 80 percent during the day. No rainfall was recorded at Palam, Ayanagar and Ridge, while Safdarjung only recorded “traces” of rainfall.

Jammu, 31.2 Srinagar 33.6: 2021

The day temperature in Jammu was recorded as 31.2 degrees Celsius

In Srinagar it was 33.6 degrees C.

12th July

13th July

119mm of rainfall, Delhi/ 2018

13 July 2018 at Delhi’s Minto Bridge
Water accumulating under 13 July 2018 at Delhi’s Minto Bridge has been an almost- annual feature for several decades now.
Photo: Piyal Bhattacharjee
From [ The Times of India ]

See graphic, '13 July 2018 at Delhi’s Minto Bridge '

2018: Silver lining: Mercury dips, more relief in days to come

Delhi received its heaviest spell of rain of 2018 on July 13 when Safdarjung recorded 53.6mm. Ridge recorded almost 119mm of rainfall in 24 hours.

Around 3pm the dark clouds opened up and torrential rain lashed the capital, flooding the streets and bringing the temperature down by 10 degrees to 25 degrees Celsius. By 5.30pm, the Safdarjung observatory, whose records are taken as the base for Delhi’s weather, had recorded 53.6mm of rainfall. The Ridge logged the highest rainfall during the period with 118.4mm.

Before the downpour on Friday, Delhi had received a total of 64.3mm of rainfall since the beginning of July. The average for the month is 210.6mm.

The maximum temperature recorded in Delhi on Friday was 34.2 degrees Celsius, two notches below the normal for this time of the year.

The other weather stations in Delhi recorded moderate to heavy rain, with Ayanagar receiving 71.4mm of rainfall, while Lodhi Road and Palam logging 44.2mm and 14.2mm, respectively, till 5.30 pm. The precipitation was at its most intense between 3pm and 4pm, and while the rainfall lessened after that.

14th July

Delhi, 33.9°C mx, little rain; 2018

2018: Cool weather to stay, but only light rain today

The capital witnessed a relatively calm on 14 July with only drizzle and light rain activity being recorded in isolated parts around the city.

The showers on 13 July, however, saw mercury dip by several notches with the maximum on Saturday recorded at 33.9° Celsius — one degree below normal for the season.

The Ridge station, which had recorded the maximum rainfall – 118.5mm on 13 July, received the most rain (13.4mm) on 14 July as well. Other stations like Palam and Ayanagar recorded 7.4 and 2.6mm of rainfall till 5.30pm, while Lodhi Road and Safdarjung recorded no rainfall on 14 July.

15th July

16th July

Delhi, 34.1°Cmx; 32mm rain, 2018

2018: Expect more rain, temperatures likely to drop further

After a dry 15 July, Delhi witnessed a return of monsoon showers on 16 July with light to moderate rain recorded in most parts of the capital. The showers lead to waterlogging and traffic snarls — especially during the afternoon. The capital received 32mm of rain at Safdarjung till 5.30pm Overcast skies were a feature throughout the day as maximum temperatures were recorded at 34.1 degrees Celsius — one notch below normal for the season.“Mainly northwest Delhi was affected on Monday.” said Kuldeep Srivastava, scientist at the regional met office. According to met office, areas under Palam, Lodhi Road, Ridge and Ayanagar recorded 25.2 mm, 30.8 mm, 38.6 mm, 1.7mm rains respectively during the same period.

17th July

18th July

19th July

20th July

Delhi, 32.4°C; 24.2mm rain, 2018

2018: Rain back, but no monsoon wading at Minto Bridge

Thundershowers returned to the capital on 20th July morning. The city recorded 24.2mm rainfall till 5.30pm. Delhi’s maximum temperature was recorded at 32.4 degrees Celsius – two notches below normal for this time of the season. Humidity levels, however, were on the higher side, oscillating between 85 and 95%.

21st July

123mm rain in Delhi/ 2013

2013: The heaviest spell of rainfall received between 2008-2018 in Delhi — 123mm in 24 hours.

22nd July

23rd July

24th July

25th July

Mount Abu, 770 mm rain, 2017

Mount Abu scales new peak

Mohammed Iqbal JAIPUR, JULY 25, 2017

It poured:Life was thrown out of gear as it had rained incessantly for the past two days. Receives 770 mm in 24 hours, flood-like scene in Rajasthan

The desert state of Rajasthan may want to permanently ban the cliché, ‘like the deserts miss the rain,’ as heavy downpour for the third consecutive day led to flood-like situations in Sirohi, Jalore and Pali districts.

The State’s lone hill station, Mount Abu in Sirohi district, received an unprecedented 770 mm of rain in 24 hours. Statistics show that until 2010, the 100-year record for a single-day of rain in Mt Abu was 653 mm in 1992. The only comparable deluge after was a 453 mm downpour in 2015. According to A.K. Srivastava of the Indian Meteorological Department (IMD), Pune, this was “possibly” the maximum rain ever received in the region.

In comparison, the torrential rain that brought Mumbai to a standstill in 2005 was 944 mm and 644 mm on July 26 and 27, whereas Chennai was brought to its knees in 2015 with a cumulative November tally of 1,049 mm.

A rise in extreme rainfall events, according to experts, is the consequence of a spike in temperatures across India in recent decades, and its effect on the monsoon. “Mt. Abu being hilly may not see a situation like Mumbai. But it is now well established that these rain records are a fall-out of global warming,” Mr. Srivastava said. Mount Abu is at an elevation of 4,000 ft above sea level.

Vellore 40 °C, 2017

Vellore records 40 degrees Celsius

VENKATACHALAPATHY C_VENKATACHALAPATHY, VELLORE, JULY 25, 2017

Hot days return:With the temperature soaring, it is a challenge for the staff at Amirthi Zoo in Vellore to provide enough water for the animals.C.

Attributable to weak southwest monsoon activity, say officials

After several days of pleasant weather, the temperature has started to soar in the Fort City in the last few days. The temperature touched the 40-degrees Celsius mark on July 23 for the first time in several days.

According to the Meteorological Office, Vellore, Monday recorded a maximum temperature of 39.9 degree Celsius. The mercury level has been rising in the last four days.

The return of hot weather has surprised many residents of the city.

After recording a temperature of 36.6 degree Celsius on July 20, the mercury level started to soar, touching 38.5 degree Celsius on July 21, 39.5 degree Celsius on July 22 and 40.1 degree Celsius on July 23.

This, according to officials, was due to weak southwest monsoon activity. Due to insufficient rainfall this monsoon, the temperature has been increasing. In fact, the temperature level has been abnormal in July and it could worsen if there is no rain.

26th July

Mumbai, 944mm rainfall/ 2005

July 26, 2005. In 2005, Mumbai had recorded up to 944mm rainfall in 24 hours.

Sandeep Sahany, V. Venugopal, Ravi S. Nanjundiah | The 26 July 2005 heavy rainfall event over Mumbai: numerical modeling aspects | Meteorology and Atmospheric Physics | December 2010, Volume 109, Issue 3–4, pp 115–128

The rainfall event over Santacruz (Mumbai, India) on 26–27 July, 2005, was of unprecedented intensity and accumulation in a very short duration. Prior to the occurrence of this event, the monsoon was in its break phase from 19 to 22 July. A low-pressure area formed over the northern Bay of Bengal (off the Gangetic West Bengal and Orissa coast) on 23 July and persisted for a period of 2 days. It became well marked on 25 July, and then started moving inland in the westward direction. During the 24-h period of 26–27 July, 2005, Santacruz received a record high rainfall of 94.4 cm. The event was highly localized, which can be gauged from the fact that Colaba in south Mumbai, around 24 km from Santacruz, received an accumulated rainfall of only 7.3 cm, during the same 24-h period.

Most of the operational numerical models failed to predict this extreme event. In one of the previous studies, Vaidya and Kulkarni (2007) reported that their model failed to simulate the 38.1 cm of rainfall that occurred during 0900–1200 UTC, 26 July 2005, due to the coarse grid spacing (40 km). In another modeling study, Deb et al. (2008) investigated the impact of the Tropical Rainfall Measurement Mission (TRMM) Microwave Imager (TMI) sea surface temperature (SST) on the simulation of the heavy rainfall episode over Mumbai, using two different mesoscale models. They found that the intensity of maximum rainfall around Mumbai was significantly improved with TMI SST as the surface boundary condition in both the models. Using the Weather Research and Forecasting (WRF) model, Kumar et al. (2008) reported that an interplay of various factors like the low-pressure area over the Bay, strong moisture convergence, and meridional temperature gradient might have contributed to an event of such magnitude.

A major feature of this event was that around 65 cm of rainfall was accumulated in a span of 6 h, which amounts to 70% of the total rainfall being accumulated in just 25% of the time, hinting at the strong intensities of rainfall that might have occurred during the period.

During the Indian monsoon season (June through September), especially in the months of July and August, many locations along the west coast of India (towards the windward side of the Western Ghats) receive heavy rainfall. The strong moisture-laden westerlies from the Arabian Sea interact with the topography, causing heavy precipitation over this region. The other important factors leading to such intense rainfall events are the mid-tropospheric cyclones, and organized convection in the tropical convergence zone (e.g., Krishnamurti and Hawkins 1970; Benson and Rao 1987; Ogura and Yoshizaki 1988). In the past, heavy rainfall of the order of 50 cm/day has been reported at various locations along the Indian west coast (Dhar and Nandargi 1998; Kulkarni et al. 1998).

In a previous study, Doswell et al. 1996 emphasized the importance of ingredients-based methodology for flash flood forecasting. They suggested that all flash flood events have some basic ingredients in common, whose presence can be used as potential indicators of heavy precipitation. They reported that heavy precipitation rates involve high values of vertical moisture flux, associated with high vertical velocity and substantial amount of water vapor contained in the ascending air. The other important factor responsible for heavy rainfall rates is the precipitation efficiency, which in turn is a function of the relative humidity of the environment, and several other factors like wind shear.

Delhi, Rainfall/ 2018

Rainfall in Delhi on 26 July, 2018, and the affected areas

For some reason the accompanying graphic did not get uploaded. Therefore, here is a detailed reported from India Today

Heavy rains lash Delhi-NCR, road caves in, water-logging disrupts traffic: / India Today Web Desk/ UPDATED: Jul 26, 2018 17:11 IST

Delhi and the National Capital Region were greeted by heavy monsoon showers on Thursday morning. Several parts of Ghaziabad and Greater Noida were submerged in knee-deep water. People going to offices were the worst hit as traffic at many places like AIIMS, Hauz Khas, Wazirpur, Shalimar Bagh, Rohini and other low-lying areas in Dwarka were badly hit. Rains ensured that the traffic leading to the Film City in Noida Sector 16 (A) crawled. Several housing societies in Greater Noida, Vasundhara and Vaisahali reported heavy waterlogging. Stay with our LIVE BLOG as we bring you all the latest news, photos, and videos of Delhi-NCR rains.

Ghaziabad road caves in

Ghaziabad: Railway station waterlogged

Underpass near Greater Noida's Knowledge Park waterlogged Greater Noida's Knowledge Park underpass was heavily water-logged. The situation is better now compared to morning.

Subway near Badarpur metro station flooded

Delhi Traffic Police receives 29 waterlogging calls

Water water everywhere: Situation in Greater Noida West Sector 4 A Twitter user shared images from Greater Noida West Sector 4. Rains seem to have created pools there.

Visuals from Noida: Waterlogging leads to jammed roads

Image from Botanical Garden area in Noida shows cars driving through water-logged roads.

Badarpur metro station filled with water

Badarpur Border metro station fully waterlogged.

Vasundhara road cave in: Residents of Vartalok society asked to vacate

India Today's ground report: Roads look flooded after heavy rains in Delhi-NCR

Heavy rains wreak havoc in Delhi-NCR.

Visuals of the weather from Faridabad. The traffic looks better than other places.

Visuals from Ghaziabad show water-logging in several parts.

27th July

Delhi, 28.3°C; 45.8mm rain, 2018

2018 Agony and ecstasy: Misery on roads, but relief from heat

Rain Causes Waterlogging At 15 Choke Points

The city received strong overnight showers for the second straight day with rainfall being recorded at 45.8mm till 8.30am on 27 July. Large parts of the NCR reported waterlogging with intermittent rain continuing throughout the day. The maximum temperature was 28.3 degrees Celsius, six notches below normal.

The capital received 4.58mm rainfall between 8.30am on 26 July and 8.30am on 27 July, while another 2.5mm was recorded in the next nine hours. Weather stations like Palam, Lodhi Road and Ridge received 37.4mm, 51.8mm and 46.2mm of rainfall, respectively, till 8.30am on 27 July. Humidity level was also on the higher side oscillating between 87% and 100%.

“Most rainfall activity took place in the morning, while we only recorded a drizzle between 8.30am and 5.30pm,” a met official said.

Meanwhile, snarls were reported from 15 stretches prone to waterlogging after the morning showers. Traffic police said waterlogging was reported on NH-24 from Ghazipur to Mayur Vihar Phase-II, under Modi Mill flyover, Aali Gaon, MB Road and Mehrauli-Mahipalpur Road.

Areas like Aurobindo Marg, ITO, RTR Flyover, Munirka, Patparganj, Laxmi Nagar, Saket, Malviya Nagar, Greater Kailash-I, Sangam Vihar, Ashok Vihar and Minto Road were submerged in at least ankle deep water.

Yamuna breaches warning level: 2018

2018: Yamuna breaches warning level | AlokKNMishra@timesgroup.com

The water level of Yamuna crossed the warning mark on 27 June evening, a day earlier than anticipated. While the warning level is 204m, the river was flowing at 204.1m.

A survey conducted in 2013 showed that around 12,000 vegetable farmers live on the floodplain in east Delhi alone.

28th July

Gurgaon/ 52 mm rainfall/ 2016

On July 28, 2016, the city received 52 mm of rainfall that ended up causing a 24-hour-long jam.

29th July

30th July

31st July

See also

January weather in India <> February weather in India <> March weather in India <> April weather in India <> May weather in India <> June weather in India <> July weather in India <> August weather in India <> September weather in India <> October weather in India <> November weather in India <> December weather in India