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Brace for another squall showdown today

The Nor’wester missed its chance of a hat-trick in Ranchi and Jamshedpur on Sunday, but may return to take Jharkhand by storm within another 24 hours.

The Patna Meteorological Centre issued a lightning and thundersquall warning for Monday. An alert has also been sounded in isolated pockets for a hailstorm reaching a wind speed of 60kmph quite like Saturday’s stunner.

A.K. Sen, the director of Patna weather office, said a cyclonic circulation hovering over Bihar was also impacting Jharkhand’s weather. “The circulation is helping in formation of clouds and moisture incursion, a condition conducive to Nor’wester activity,” he explained.

Capital Ranchi and steel hub Jamshedpur experienced twin Nor’westers on Friday and Saturday, which made maximum temperatures plummet. On Sunday too, cumulonimbus or convective clouds formed over the cities and adjoining districts. There was thunder and lightning, but no Nor’wester owing to low wind speed. The Met office in Ranchi recorded breeze at 15kmph, while the same in Jamshedpur was around 20kmph.

“There was a forecast of another Nor’wester in Ranchi and other places. But, it did not happen. Rainfall was reported in traces in the capital and its adjoining areas,” said B.K. Mandal, the director of Ranchi Meteorological Centre. He did not discard the possibility of a fourth Nor’wester on Monday.

South-westerly and easterly winds are dominating most parts of the state and helping in moisture incursion. Many places, including Jamshedpur, reported humidity as high as 84 per cent or above.

Two Nor’westers in quick succession have kept the Celsius on leash in most parts of the state. Ranchi and Jamshedpur recorded below normal maximum temperatures of 35°C and 39.4°C, respectively. Districts like Dhanbad and Bokaro too recorded below 40°C. Heat-cursed Daltonganj alone scored 41.6°C on Sunday.

The steel city also witnessed a rare celestial occurrence — the sun halo — for over an hour from 11.45am. Ringed dark, with shining rainbow colours, the sun halo covered a radius of 50km, said Met officials. The halo takes place when transparent cirrus clouds reach “supercool conditions (minus 38°C)” at an altitude of 6,000 metres.

Such a phenomenon was witnessed for the second time in Jharkhand in a fortnight. On April 20, a similar sun halo was seen from Hazaribagh and Ranchi.