The heat from these land masses causes the air atop the land mass to heat up and rise through the atmosphere. Summer monsoons happen when large land masses heat up. However, they blow a lot of dry air from the interior of a continent that can bring about drought, water shortages and crop failures. Winter monsoons are less well-known because they generally do not bring major weather conditions. Summer monsoons are the weather phenomenon that is most commonly associated with the term “monsoon,” with heavy long-lasting rains. Monsoon seasons are generally classified as either summer or winter monsoons depending on whether the prevailing winds blow from the coast (summer) or from the interior (winter) of a continent. The North American monsoon season in the southwest United States and northwest Mexico runs from June 15 to September 30. While those weather events measure their lifespans in days or weeks, monsoons measure their lifespans over the course of entire seasons. Like hurricanes, typhoons and cyclones, monsoons are a product of tropical latitudes – especially where a large land mass is close to warm waters. It can bring either extremely wet or extremely dry weather to an area. Light to moderate rainfall at many places, with isolated heavy falls are likely over Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura on October 24, the IMD said.While often thought of as long-term heavy rain over a specific area, a monsoon is actually the name for a seasonal change in the direction of the prevailing winds. The rains may also lead to damage to horticulture and standing crops in some areas due to inundation and squally winds and riverine flooding in some river catchments. It added that there is a possibility of landslides in hilly areas of northeastern states, occasional reduction in visibility due to heavy rainfall and disruption of traffic in cities. Issuing an impact-based forecast for the northeastern states, the IMD said localised flooding of roads, water logging in low-lying areas and closure of underpasses mainly in urban areas is expected. This is the third low pressure area that developed in the Bay of Bengal in October and second to intensify into a depression. Low pressure area is the first stage of any cyclone and a well-marked low pressure area is the second stage. The depression is expected to abate and become a well-marked low pressure area by October 24. “Due to this, light to moderate rainfall at most places, with heavy to very heavy falls (115.6-204.4 mm/day) are likely at a few places, and extremely heavy falls at isolated places are very likely over Tripura, heavy to very heavy falls at a few places Nagaland, Manipur, Mizoram, south Assam and Meghalaya are likely,” the IMD said. The IMD said the depression is very likely to cross West Bengal and adjoining Bangladesh coasts between Sagar Islands (West Bengal) and Khepupara (Bangladesh) over the Sundarbans on Friday. NEW DELHI: Depression over the Bay of Bengal will bring heavy rain to the northeastern states of Tripura, Nagaland, Manipur, Mizoram, Assam and Meghalaya, the Cyclone Warning Division of the India Meteorological Department said on Friday.
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