Description This layer describes the direction of wind in different seasons. These are characterised by seasonal reversals between summer and winter in Bangladesh. During the winter season, a centre of high pressure lies over the northwestern part of India. A stream of cold air flows eastward from this high pressure and enters the country through its northeast corner by changing its course clockwise, almost right-angle. This wind is the part of the winter monsoon circulation of the South Asian subcontinent. During this season, wind inside the country generally have a northerly component (flowing from north or northwest). On the other hand, during the summer season, a centre of low pressure develops over the west-central part of India because of intense surface heat. As a result, a stream of warm and moist air from the Bay of Bengal flows toward the above-mentioned low pressure through Bangladesh (similar flow prevails from the Arabian Sea toward India). This wind is the part of the summer monsoon circulation of the sub-continent. So, the prevailing wind direction in Bangladesh during the summer season has generally a southerly component (flowing from the south, southwest or southeast). However, wind directions during the transition seasons (in spring and autumn) are variable. Generally, winds are stronger in summer (8-16 km/hr) than in winter (3-6 km/hr). The mean pressure is 1,020 millibars in January and 1,005 millibars during March through September. Source Bangladesh Meteorological Department (BMD). Banglapedia. Limitation of Use The GIS data and any other information presented on this web site is strictly limited to non commercial use. Disclaimer Geospatial Bangladesh makes no representation or warranty as to the accuracy, completeness, reliability or suitability of the GIS data and any other information provided in this website for any specific purpose and disclaims any responsibility or liability for any expenses, losses, damages and costs which may be suffered or incurred as a result of or in connection with using or relying on the data or the information provided in this website. Content Type Printable Map EPSG:4326