New Delhi, Friday, June 29 Monsoon continues to disappoint as prospect of a revival is unlikely during the next two to three days anywhere in the country. The monsoon has failed to gain any momentum despite some weather formations in the week gone by that had promise.
The country has experienced deficiency in rainfall that stands at 25 percent less than the historical averages till date.
Coastal Maharashtra and Goa are poised for a decrease in rain activity during the next forty eight hours as the recent surge has weakened while monsoon showers lashed these parts with good rains during the last twenty four hours.
Gangetic West Bengal may receive rainfall and bring relief as temperatures would drop a bit under the aegis of a cyclonic circulation.
This cyclonic circulation spells more good news as it is expected to develop into a low pressure area over head Bay of Bengal as it reduces in height. The cyclonic circulation is currently in the upper air.
The low pressure would interact with a trough extending along the Indo-Gangetic plains and funnel moisture and hopefully the progress of monsoon into east India. Delhi may also experience first showers of this monsoon by June 5, if the low pressure sustains the momentum as depicted by numeric weather prediction guidance.
Latest cloud images show a build-up cloud mass over north Bay of Bengal that would trigger rainfall activities here.
A trough extends from sub-Himalayan West Bengal to north Bay of Bengal and would sustain rainfall over northeast, sub-Himalayan West Bengal and Sikkim. But rainfall would decrease in intensity over northeast due to a gradual weakening of the trough.
Troughs are places where winds from opposing directions meet (or winds turn) and atmospheric pressure is low while the turbulence caused by such interaction (or turning) leads to rain, thundershowers and storms. Southwesterly winds are turning into northwesterly along this trough.
The weather system developing over Bay of Bengal would suck away a lot of energy and moisture from this trough.
Mixing of northwesterly winds from the north and southwesterly winds from Arabian Sea and Bay of Bengal along north and coastal Andhra Pradesh would usher in light rain spells over the region and adjoining parts of interior Karnataka, Maharashtra, Chhattisgarh and Orissa.
Stray moisture may also cause isolated rains and thunderstorms at a few places over rest of India except Rajasthan, Gujarat and west Madhya Pradesh.
Northwest India including Uttar Pradesh, Bihar, Jharkhand and adjoining West Bengal would continue to reel under intense hot weather conditions for the next twenty four hours as dry and hot northwesterly winds from the Thar are dominating these areas.
Parts of Central India would also share the fate of these parts as the region is being fed by similar winds. The west coast may also witness marginal rise in temperatures.
