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Cover blown, Celsius shoots

The Celsius climbed more than four notches overnight, taking Calcutta back to a May-like 35.5 degrees Celsius on Tuesday after a March-like 31 degrees on Monday.

But the weather office held out hope for another Nor’wester, possibly on Wednesday or Thursday.

The primary reason for a hot Tuesday was the absence of clouds over the city. The shifting of a cyclonic circulation over central Bengal towards Bangladesh deprived the city of a cloud cover that could have kept the temperature down.

As the sun beat down mercilessly on Tuesday, the maximum temperature shot up from four degrees below normal on Monday to normal the day after.

According to Accuweather.com, the “real feel temperature” was a gruelling 50 degrees Celsius at 1pm.

The real feel temperature tries to provide a measure of how a person would feel outdoors by taking into account many factors, including humidity, cloud cover, winds, intensity of solar radiation and angle of the sun. Humidity is a large contributor in determining the real feel. The time of the day is an important factor too because of the sun’s angle.

“Given the cooling shower over the weekend, I was carrying my umbrella in anticipation of another spell of rain. Instead, I ended up using it to shield me from the intense heat,” said Shibani Roy, 24, a resident of Deshapriya Park.

Meteorologists said Nor’westers were on the way, though the one brewing over the Jharkhand–Bengal border on Tuesday fizzled out before it could reach the city.

Adequate moisture incursion and heating of the Chhotanagpur Plateau could fetch more Nor’westers to the city in the next few days, a weather scientist said.

“There is a high-pressure belt over the Bay of Bengal which is causing moisture incursion into the sate. At the same time places in Jharkhand and western regions of Bengal are witnessing high temperatures. Hence, one can expect more Nor’westers over the next 48 hours as a result of these factors,” said Gokul Chandra Debnath, director of the India Meteorological Department in Calcutta.

Experts said the Nor’wester scheduled for Monday didn’t turn up because wind at different levels of the atmosphere acted up.