Friday was warmest January day in Delhi in eight years
“The previous highest in January was in 2010 when the maximum temperature was recorded at 28 degrees Celsius on January 30delhi Updated: Jan 18, 2018 20:43 IST
Delhi on Thursday recorded a maximum temperature of 27.7 degree Celsius, eight points above normal, making it the warmest January day in eight years.
“The previous highest in January was in 2010 when the maximum temperature was recorded at 28 degrees Celsius on January 30. The all-time high ever recorded this month was on January 28, 2004 at 32.5 degrees Celsius,” a MeT official said, adding that the minimum temperature on Thursday touched 7 degree Celsius, normal for this time of the year.
According to officials, earlier it was the southeasterly and easterly winds and on Thursday, it was the westerly and northwesterly winds that helped shoot up the moisture levels in the Capital.
“This along with clear sky and calm winds, at one point of time during the day, resulted in the maximum temperature going up. However, keeping the above conditions in mind, this (maximum temperature) is not abnormal,” Kuldeep Srivastava, a senior scientist of the Regional Weather Forecasting Centre (RWFC), said.
The wind speed on Thursday remained between 10-15km per hour overall but it dropped to 0 during the day.
It was also a foggy morning in the city with both Safdarjung and Palam recording a visibility of 150m between 5.30am and 7.30am. This gradually improved during the day. Railway officials said 54 trains were running late, 36 rescheduled and 15 cancelled due to low visibility in Delhi and other places in North India on Thursday.
There were no disruptions in flight movements in the early hours due to fog, said Delhi International Airport Limited officials.
“On Friday, clear sky is expected with moderate or dense fog in the morning hours. The maximum and minimum temperatures are expected to be around 27 and 8 degree Celsius,” an official said.
In terms of pollution, the air quality worsened in Delhi on Thursday. The air quality index, which was 347 on Wednesday in “very poor” category, reached 397, few notches below “severe”. AQI is calculated on a scale of 0-500. An AQI between 0-50 is considered good, 51-100 satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor and 401-500 severe.
According to the CPCB real-time monitoring, at 6am on Thursday, the concentrations of PM2.5 and PM10 were 231.9ug/m3 and 370.5ug/m3 respectively. The particulate matters kept increasing throughout the day and on Thursday at 6pm the concentrations of PM2.5 and PM10 were 262.3ug/m3 and 428.9ug/m3.
Both PM10 and PM2.5 are ultrafine particles, the dominant pollutants in Delhi. The acceptable levels of PM10, the larger particulate matter, and PM 2.5, which measures the finer and more dangerous particulate matter, are 100μg/m3 and 60μg/m3, respectively.
“With low wind speed and high relative humidity, the air quality of Delhi has already started deteriorating. While the moisture is helping to trap the pollutants the low-velocity wind is failing to disperse them,” said Dipankar Saha, head of the air quality laboratory at Central Pollution Control Board.
First Published: Jan 18, 2018 20:42 IST