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Maximum temperatures have tended to look down over larger parts of the country due to persistent but not uniformly productive cloudiness.
An India Meteorological Department (IMD) update on Sunday evening said that the 24 hours ending in the morning saw maximum temperatures fall by 2-6 deg Celsius over Bihar and West Bengal.
The margin of fall was 2-3 deg Celsius over parts of east Madhya Pradesh, Jharkhand, Orissa and coastal Gujarat.
BELOW NORMAL
The maxima were below normal by 2 to 5 deg Celsius over parts of Bihar, Chhattisgarh, West Bengal and north Orissa, the usual ‘hot spots.'
They had been set back by 2-3 deg Celsius also over parts of east Madhya Pradesh, interior Maharashtra, north Andhra Pradesh and north Karnataka.
The rest of the country witnessed near-normal temperatures, with the highest maximum of 41.3 deg Celsius being recorded at Surendranagar in Gujarat.
The IMD expected a further fall in maximum temperatures by 2-3 deg Celsius over northwest and central India.
In this manner, the arrival of summer has been delayed, with global model forecasts suggesting that the outgoing long-wave radiation (OLR) values would stay in the negative region for the time being.
SUMMER DELAYED
Suppressed terrestrial radiation is taken to mean the presence of cloudiness, some of it productive across northeast, east, southeast and southwest India during this week.
The US National Centres for Environmental Prediction sees thunderstorms cropping downstream the seasonally occurring upper air troughs extending into the south.
On Sunday, the IMD said that a western disturbance operating from over north Pakistan would affect western Himalayan region and the adjoining plains until Wednesday.
An upper air trough originating in from central Rajasthan looked down south and headed into coastal Karnataka across West Madhya Pradesh and Marathawada.
An embedded cyclonic circulation was located to over central parts of Rajasthan. The south-bound trough is expected to set up weather occasionally downstream.
CONVECTIVE CLOUDS
Satellite imagery on Sunday afternoon showed the presence of convective (rain-bearing) clouds over parts of Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Haryana, Assam, Meghalaya, Arunachal Pradesh, Sikkim, west Uttar Pradesh and south Bay of Bengal.
Low medium clouds wee seen over parts of the rest of northwest, west, east, northeast and south peninsular India.
A weather warning issued by the IMD said that isolated heavy snowfall would unfold over Jammu and Kashmir and Himachal Pradesh during until Wednesday.
Isolated thunder squalls would occur over east Uttar Pradesh, Bihar, Jharkhand, Chhattisgarh, Madhya Pradesh and Vidarbha.
DUST STORMS
Isolated dust storms or thunderstorms accompanied with squalls may force their way across Punjab, Rajasthan, Haryana, Delhi and west Uttar Pradesh.
A short-term outlook said that widespread rain or snowfall would occur over Jammu and Kashmir and Himachal Pradesh. It is expected to scale up over Uttarakhand later.
Scattered rain or thundershowers has been forecast over interior Maharashtra and central India on Monday and isolated over east India.
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