#
ESS124
Prof.
Jin-Yi Yu
The Mature Cyclone
In a mature
cyclone, warm sever
weather (thunderstorms and
tornadoes) occurs ahead of either
the upper-level front or the
cold front.
Cold sever
weather (blizzards and ice
storms) occurs just northwest
of the low-pressure center
(under the comma head).
Occlusion processes also begin with either an
upper-level front catches the
warm front or the cold front catches the warm front.