Add a winter module to your car kit

Put warmth where passengers can get it

Pack dry gloves, hats, spare socks, and blankets in a zippered bag that a passenger can reach without unloading the trunk. Use the largest coat and boot sizes your household needs as a quick check on storage space. For a family of four, four warm layers beat one oversized blanket if people need to get out at different times.

Include snacks you can eat without preparation and water you bring inside when conditions could freeze it. Pack a charging cable that fits the phone you use now. Review the storage instructions for portable batteries and medications, especially if the car sits outside overnight.

Keep snow tools separate

An ice scraper, snow brush, small shovel, and sealed container of traction material belong together. Put them where you can reach them when the cargo area is full. Keep wet snow tools away from your spare clothing, and let them dry before putting the kit away.

Before a storm, check the tires, wipers, washer fluid, and fuel or battery charge. NHTSA advises checking forecasts and road conditions and postponing nonessential travel when roads are poor. If you have to go, tell someone your route and when you expect to arrive.

Make a winter swap routine

• At the first cold forecast, add the winter bag and check whether each regular passenger has enough warm gear.
• After a trip, dry wet layers and replace any snacks, water, or batteries you used.
• Before a long drive, open the kit with the trunk loaded. Move anything you cannot reach quickly.
• If stranded in winter weather, use NHTSA’s emergency guidance. Keep the exhaust clear of snow and avoid running the vehicle in an enclosed space.