Delhi Weather LATEST Update: Rain Forecast, IMD Revises August Rainfall Data

Delhi Weather LATEST Update: Delhi and parts of NCR may see cloudy skies and rain today, while IMD has revised August rainfall data, leaving the Capital 29.6 mm short of its monthly normal

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Delhi Weather Today: Rain Likely Across the Capital

Delhi is expected to remain generally cloudy on Wednesday, August 12, with light to moderate rain likely during the afternoon, evening and night. Some areas may also experience moderate spells of rainfall.

The minimum temperature is likely to settle around 29°C, while the maximum may touch 36°C. Daytime temperatures are expected to remain close to 29°C for parts of the day.

The wind speed is forecast to be around 1.67, with winds moving at 355 degrees and gusts reaching up to 5.28.

The sun is expected to rise at 5:48 AM and set at 7:03 PM.

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Noida, Ghaziabad, Faridabad and Gurgaon May Also Get Rain

Several parts of the National Capital Region are also likely to experience cloudy weather and rain.

Noida is expected to record a minimum temperature of 28°C and a maximum of 32°C. The temperature may remain around 31°C during the day. The city could witness one or two spells of rain or thundershowers, along with partly cloudy conditions.

Noida is likely to see winds at around 3.61, with a direction of 106 degrees and gusts reaching 7.5. Sunrise is expected at 5:47 AM.

Ghaziabad, Faridabad and Gurgaon may also experience varying degrees of rainfall and cloudy skies during the day.

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IMD Corrects Rainfall Data: Delhi Still 29.6 mm Short of August Normal

The India Meteorological Department has revised Delhi's August rainfall figures after identifying an entry error in the data recorded for August 6.

The rainfall recorded for that day was initially listed as 56 mm but was later corrected to 18.7 mm. Following the revision, the cumulative rainfall at Safdarjung, Delhi's base weather station, stands at 197.2 mm for August so far.

Earlier, the IMD website had shown cumulative rainfall of 230.5 mm, which suggested that Delhi had already exceeded its August rainfall normal within the first eight days of the month.

According to the IMD's 1991-2020 long-period average, Safdarjung normally receives 226.8 mm of rainfall in August. With the revised figure of 197.2 mm, Delhi is currently 29.6 mm below its monthly normal, having received around 87% of the expected rainfall.

IMD Director Dr Mrutyunjay Mohapatra said the discrepancy appeared to have resulted from a human error in data logging, and the exact reason was being examined.

D R Pattanaik, Scientist G at IMD, explained that 56 mm had been entered instead of the correct 18.7 mm figure for August 6. He said the error affected the cumulative figure displayed on the website, while the daily Delhi weather bulletin had continued to carry the correct rainfall figure.

IMD senior scientist Krishna Mishra said Safdarjung is a manual observatory where meteorological observations are recorded and logged by observers. An incorrect value entered into the system was subsequently included in the cumulative calculation.

How Does IMD Record Weather Data?

Safdarjung is a manual meteorological observatory, although its instruments automatically transmit observations to a receiving centre.

Several weather parameters, including rainfall, temperature, humidity, sunshine duration, wind and cloud cover, are recorded manually by observers. The observations are then sent to the designated Meteorological Centre or Regional Meteorological Centre, where they are scrutinised and entered into standard digital formats.

The information is subsequently fed into the IMD database. Manual and automatic observations follow separate routes before eventually reaching the central database, where quality control, consistency checks and data processing are carried out.

Errors can occur at different stages, including observation, measurement, transmission and data entry. Readings considered suspicious are flagged for further verification instead of being automatically removed.