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Cyclones in the Arabian sea form mostly from May till June and then from September till October, monsoon season plays a vital role for the formation of cyclone in this basin. [ 3 ] Each year before the onset of monsoon that is 15 April to 15 July and also after its withdrawal that is 15 September to 15 December , there is always a distinct ...
Normally, the southwest monsoon can be expected to "burst" onto the western coast of India (near Thiruvananthapuram) at the beginning of June and to cover the entire country by mid-July. [11] [23] [24] Its withdrawal from India typically starts at the beginning of September and finishes by the beginning of October. [25] [26]
A delay of a few days in the arrival of the monsoon can badly affect the economy, as evidenced in the numerous droughts in India in the 1990s. The monsoon is widely welcomed and appreciated by city-dwellers as well, for it provides relief from the climax of summer heat in June. [54] However, the roads take a battering every year.
Of the major monsoon systems, only the North American monsoon is expected to have substantial decreases in total precipitation, with the most likely outcome being a 1%-6% reduction in summer rainfall.
Each year before the onset of monsoon that is 15 April to 15 July and also after its withdrawal that is 15 September to 15 December, there is always a distinct possibility of the cyclonic storm to develop in the north Arabian Sea. Cyclones form in the Arabian sea often results in strong winds and heavy rainfall in Pakistan's coastal areas.
During June–July, the Great Whirl grows at 4-10°N, and a cold wedge shape water mass develops to the offshore at latitude 10-12°N. The size and strength of the Great Whirl during the summer monsoon is measured as 10 cm/s velocity at about 1000 m depth, while some visible gyre structure is observed at further depth.
By the time he was ready to launch his assault on Madras it was December before the first French troops reached Madras, delayed partly by the onset of the monsoon season. This gave the British extra time to prepare their defences and withdraw their outposts, increasing the garrison to nearly 4,000 troops. [4]
Much of the total rainfall each day occurs in the first minutes of the downpour, [7] before the storms mature into their stratiform stage. [11] Most places have only one wet season, but areas of the tropics can have two wet seasons, because the monsoon trough, or Intertropical Convergence Zone, can pass over locations in the tropics twice per ...