A low-pressure area over the Bay of Bengal triggered widespread rain in the city on Thursday. The southwest monsoon is expected to reach Kolkata riding the same system over the next 24 hours.“ It is expected to reach Gangetic Bengal, including Kolkata, over the next 24 hours.” The weather department studies various factors such as amount and distribution of rainfall, wind flow and moisture content in the air to decide whether to declare the onset of the monsoon in a particular area.
Apart from widespread rain, the monsoon is marked by wind blowing from southwest, the direction of the Bay of Bengal, instead of from north India.The minimum relative humidity, a measure of moisture in the air during the daytime, has also been on the higher side. On Wednesday, it was 70 per cent.The city woke up to a cloudy sky on Thursday. Rain, which came in phases, started in the morning. According to the pumping stations of the civic body, between 6pm on Wednesday and 6pm on Thursday.
Apart from widespread rain, the monsoon is marked by wind blowing from southwest, the direction of the Bay of Bengal, instead of from north India.The minimum relative humidity, a measure of moisture in the air during the daytime, has also been on the higher side. On Wednesday, it was 70 per cent.The city woke up to a cloudy sky on Thursday. Rain, which came in phases, started in the morning. According to the pumping stations of the civic body, between 6pm on Wednesday and 6pm on Thursday.
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