I think I have almost figured out how to change the intervals and time of the blizzards, using coding from the MP_Blizzard scar file. So far, I was able to get it to successfully use my times, but after 1 cycle of blizzards it crashed the map to desktop. I'll post some coding after work.
EDIT: After a few tries, I was unsuccessful at getting it to work. The coding I was trying was doubling the blizzard rotation, in effect having two simultaneous blizzards, one at the times I set, and one at the default times.
I haven't been able to define these variables in the scar file. These were pulled from blizzardmultiplayer.scar
-- timing variables
blizzard_interval_min = t_blizzardData.blizzard_interval_min or 400 -- min seconds between blizzards
blizzard_interval_max = t_blizzardData.blizzard_interval_max or 800 -- max seconds between blizzards
blizzard_exit_min = t_blizzardData.blizzard_exit_min or 160 -- min duration of a blizzard
blizzard_exit_max = t_blizzardData.blizzard_exit_max or 240 -- max duration of a blizzard
blizzard_transition_time = t_blizzardData.blizzard_transition_time or 60 -- how long it takes to transition in or out of a blizzard
blizzard_transition_time_out = t_blizzardData.blizzard_transition_time_out or 30 -- how long it takes to transition out of a blizzard
blizzard_transition_ticks_per_second = t_blizzardData.blizzard_transition_ticks_per_second or 2 -- defines how smooth the gameplay transitions are