The extremely cold conditions during the 2014 "polar vortex" were due to the
the extremely cold conditions during the 2014 "polar vortex" were due to the
hadley cells.
monsoons.
ferrel cells.
rossby waves.
the jet stream.

northern hill zone (nhz)

western himalayan regions of j& k (except jammu and kathua distt.); h.p. (except una and paonta valley); uttaranchal (except tarai area); sikkim and hills of west bengal and n.e. states

north western plains zone (nwpz)

punjab, haryana, delhi, rajasthan (except kota and udaipur divisions) and western up (except jhansi division), parts of j& k (jammu and kathua distt.) and parts of hp (una dist. and paonta valley) and uttaranchal (tarai region)