What have you added for moderate to cold temps? For snow?

For my car:

Cat litter for traction.
Deicer, scraper, broom, etc.
Take a bottle of water with me -- can't leave it in the car because it will freeze

I confess my car isn't equipped with a solution to melt a block of frozen water. On the other hand, I have no plans to go beyond city driving and the like in the foreseeable future.

The big one for me is appropriate outerwear, whether I plan to travel by air, car, or otherwise.

Additional winter car suppliers:

2 microfiber fleece blankets
2 1 gallon ziplock bags, (doubled so they don't spill), filled with kitty litter
4 sets of 2 hand and 2 toe warmers

Collapsible aluminum shovel
Collapsible scraper/brush combo tool
Warm hat and gloves

Spray lock de-icer in the glove box. Normally ice only forms on one side so 1 lock should open. I also keep an additional spray in my laptop bag.

Rain x and anti fog windows before any storm. It's much easier to remove snow and ice with the rain x on the windows. The windows won't fog with the rain x anti fog.

Agree, being in SOCAL my outerwear generally consists of fleece jackets and sweaters, layered when it's cold, but for traveling outside SOCAL in the winter that's just not enough. My latest find (50% off on sale) was a -40ºF parka -- waterproof nylon shell with down insulation. It has good reviews for whatever they're worth.

I've resisted down until now because of that water falling from the sky thing, but that seems to have been fixed. Once it's in hand I'll determine what kit the pockets should carry. Film at 11.

I'm acclimated to SOCAL now and my ability to shrug off the cold rain and wet snow I grew up with in PNW is long gone. A -40ºF parka should work for me down to about +20ºF

Car carry:

For winter add-
Chains
Waterproof ground sheet for applying said chains.
Blaze orange stocking cap and rubber coated gloves

Always have-
shovel, axe and bucket to meet Forest Service laws.
wool blanket and poncho
flashlight and first aid kit
tire patch kit
misc tools and fasteners
knife and fire starters
cell charger
tow webbing
etc.

Have to give away -
Cheap flashlight
Harbor Freight packing blanket (improvised stretcher or insulation)
wool socks (buy a six pack online for cheap for the homeless or accident victims).
Easy open can of food.

My water usually does not freeze, no doubt due to relatively mild NC winters. They last several days of below-freezing weather behind the seat of my truck.

I tested a Nalgene 1000 ml water bottle in my freezer and found that you can freeze it solid without ill effects if you fill it no more than 900 ml.

I use Nalgene bottles, plus one stainless. I've learned from experience that typical bottled-water bottles are bad for long-term vehicle storage. The vibration of driving can wear a hole through the thin material.

Regarding the larger thread topic, I generally try to wear or have ready access to whatever I would need to spend the next 24 hours outside. That usually translates into wearing a slightly heavier coat than the daytime weather requires, with a knit cap in one pocket. I also try to be prepared to walk home from work.

Regards,
Steve

When I lived in Texas I actually needed to keep a pair of gloves in my coat pocket.

Jeanette Isabelle

Winter around here means cold, and usually with wind, no mater whether rain or snow falls. When I pack specially for winter emergencies, I think layers of warmth. Gloves, hats, socks, long underwear, sweater, outerwear, chemical warmers, lighting, fire, hot drinks, food and traction, all take on higher priority during the winter for me.

That reminde me of the truism about cold / wet / wind: any combination is more dangerous than one by itself.

Steve