Some Characteristics of Heavy Rainfall Events Over Northeastern States of India

High‐intensity rainfall over northeast India: Spatial pattern, short‐term fluctuations and associated multiscale oscillations

“…It confirms the earlier findings that the heavy rainfall events are mesoscale in nature and temporally short lived, even in the orographically dominated regions like NEI (Goswami et al, 2010). The lack of persistence of HIR events in NEI may be attributed to the fact that these events mainly occur in association with low‐pressure systems/cyclonic circulations, which are shortlived over the region, or the monsoon trough shifting towards the foothills of the Himalayas (Das et al, 2009b; Mohapatra et al, 2008; Ramamurthy, 1969).…”

“…Goswami et al (2010) examined the extreme rainfall over NEI and demonstrated that rather than being the result of lone thunderstorms, these extreme events occurred in association with monsoon synoptic events. Das et al (2009b) concluded that the location of the monsoon trough and synoptic systems in and around NEI have an impact on the distribution of heavy rainfall over the region during SWM.…”

“…Most parts of NEI experience a normal monsoon rainfall of more than 150 cm with an annual rainfall of more than 200 cm (Attri & Tyagi, 2010). The region receives heavy rainfall during the SWM season (Das et al, 2009b; Dikshit & Dikshit, 2014; Mohapatra, 2008; Mohapatra et al, 2008) and these events are primarily caused by the monsoon trough, tropical disturbances and the extratropical systems in westerlies (Das et al, 2009b; Mohapatra, 2008; Mohapatra et al, 2008; Srinivasan et al, 1972). Previous findings revealed that the orography of the region has a significant role in the heavy rainfall activities in the region (Goswami et al, 2010; Mahanta et al, 2013; Mohapatra, 2008; Sinha Ray et al, 1982).…”