I'd imagine that the 'bad' weather would last no more than 2 months unlike other countrieS who have it worse. been a while since I laid a car up...and now living in Somerset (where some 25yr olds have never seen snow) it'S unlikely...here's my checklist
Wash underbody to remove all dirt grime
Claybar exterior then use a cleaner wax and meguires 3 step
Nanoprotectant over the top
indoor fleece-lined cover if storing in a dry garage
Use up almost all of your fuel (remember it degrades after 3 months)
empty your washer fluid
vacuum car and treat Leather so it can really soak in
(if less than 3 months change oil prior to storage)
Over inflate your tyres (40 psi) and coat with litium grease
If longer than 2 months put car on axle stands still over inflate tyres but only by 4psi and coat with lithium grease
Ensure all drain holes work
Remove any carpet mats or any plastic or paper items from the car
Leave windows slightly open (only if completely secure)
Use a dehumidifier in your garage if possible
Use an airflow (as stated earlier)
Oh, WRITE EVERYTHING YOU'VE DONE DOWN COPY IT & KEEP IT IN TWO DIFFERENT PLACES
I'm sure here's other stuff but i've forgotten most of it
Regards
Mark