Western Disturbances and Indian Weather

This survey attem pts to present on ly some of the salient features of th is interac tion, I\!i {'ould be 1!l\t hcrf'cl from the ~ynoptil: ('~l)e­ ri(,llc e of th e Inllilln ll1e tt'Orologist~ who h[wc heon en~[',ged in t.he fieltl of synopt ic tne t-l'tIWlo~')of Intlia 1\1111 its neighhourhooll. ,rc .hall a lso tOlleh upon some of the feMIt«'s whit'h llrc Pot prf'~ont ind~fi nitc 3ntl which (w..t! furthl'r stutly an,l in\"('stiJ!,lt ioll wit h. The virtual ~ Io!).\ l character of weather phenomena hM been O IW of the recent renlisct ions of th e synoptic meteo rologist. So far h: ha~ been l'.ccu:itometl to treat the went her at, anyone phv-e f\~ l\ rOJl'iequ f'llcc of ptrenom ""nr. occurring in Umt area and the antecedent phenomena t ha t han >occurred in it s inunediat e neighbourhood. In other words, we... t her systems were SU PIH 1Seti to 1ll0\' C from one place to another with rcr...sonab le spocds und their mmlificat iun s were taken ro be determined hy synop t ic situnt ions in the immecHate neighbourh ood. Consequent ly th e synoptic meteorologist user] to treat th e tropica l weather t'."1 somet hing different, from tho weather of th e vxtretropics, nnd the northern hemi spheric weat her f\.'\ independent of t he weather situat ion in t·lle sout hern hemisphoro. J [l·t eorolog-ist s are now grK(iually realising, till t t ho t ropi('p,1 weather nnd ext ra-tropica l wect her ere m~l tually dependent . The illfh l('llec of ··,restern Disturbances", which are only de velopments of t'l\stwl\nl moving t roughs in the extrr.tropical zonal weste rlies. on ludian weather is an aspec t of t his intenv-tion betwe..-n the t ropics and the extrat-opics, with which \,-f' in [Olli:-.. :-..re vitally (·tmC'{'rllt't1. t . Introduc:Uon (U<,cri,',.,1 1f} Ocloo", 1M,; )