Thinking operationally, if freezing rain is observed with just case A, and then another cloud deck moves over it with ice involved, a precipitation type change to snow may occur.
(a precipitation type change to snow; may occur; ) Context(a precipitation type change to snow may occur,List([132, 177))):(another cloud deck; moves; over it; T:then) (freezing rain; is observed; ) (ice; involved; )
a precipitation type change to snow may occur,List([132, 177))
a precipitation type change to snow another cloud deck freezing rain ice
may occur moves is observed involved
over it T:then