During the month of February, normally 5 Western Disturbance (WD) affect northwest India and adjoining areas. The frequency of WD in February 2013 till date is near normal as 3 WD affected the country. However, the WD in this month are active than normal as the induced systems associated with WD are seen either in the form of a depression or low pressure area instead of usual upper air cyclonic circulations. The quantity and spatial distribution of rainfall in the foothills as well as plains has so far been much higher than normal.
Some of the stations in northwest India have received cumulative rainfall from 1-18 February, 2013, which is much higher than the normal rainfall for the entire month. For example Lucknow has recorded 135.7 mm (1-18 February 2013), which is all time record for the month of February. At Dehradun, the precipitation is highest after 1961 and at Barmer also, the rainfall is highest after 1939. >> More