How to Prepare for a Winter Storm
A winter storm with high winds and heavy snow can down power lines for days, block roads, and make emergency response slow or impossible. Two hours of preparation 24–48 hours before a storm hits means the difference between a long snow day and a genuine crisis. Track forecasts, verify supplies, locate shutoffs, and plan for a 72-hour outage.
Quick Summary
Time Required
2 hours pre-storm
Difficulty
Easy — checklist driven
Cost
$100–300 for full kit setup
Forecast Tracking and Emergency Kit Review
Reliable weather information gives you 48–72 hours to prepare. Use that window to verify supplies before every household in town hits the grocery store.
Monitor NOAA and multiple sources
Use weather.gov, the NOAA Weather Radio app, or a reliable regional service. Track watches (conditions favorable), warnings (imminent threat), and advisories (less severe but impactful). Note expected snowfall totals, wind speeds, and temperature lows.
Inventory water, food, and batteries
One gallon of water per person per day for three days. Non-perishable food that needs no cooking. Flashlights with fresh batteries. A hand-crank or battery NOAA radio. First aid kit. Prescription medications filled. Pet food, cash, and phone power banks.
Fill vehicle gas tanks
Keep every vehicle at least half full through the winter and top off before a storm. A full tank lets a car run its heater intermittently in an emergency and ensures you can evacuate if needed. Gas pumps do not work in power outages.
Shutoff Valve Locations
When a storm damages your home, you may need to shut off water, gas, or electricity in a hurry. Knowing where each control is—and making sure it is accessible—is not optional.
- Main water shutoff: Usually in the basement near where the main line enters the house, or at the meter outside (requires a meter key). Label it clearly. Practice turning it off and on during preparation—some old valves seize and need replacement.
- Gas shutoff: At the meter outside, typically requires a quarter-turn wrench. Keep a dedicated gas shutoff wrench tied to the meter with a zip-tie so you can always find it.
- Electrical panel: Know where the main breaker is located and can be shut off. In basement flooding, you may need to cut power before water contacts electrical equipment.
- Individual fixture valves: Know where the shutoff is for each toilet, under each sink, and behind the washing machine. A single burst supply line flooded one room is better than a whole-house catastrophe.
- Clear access to all shutoffs: Move stored items, cleaning supplies, or furniture blocking any shutoff before the storm. You will not have time to dig when you need one.
Power Outage Planning and Generator Safety
The biggest winter storm risk is a multi-day power outage. Plan for 72 hours without electricity and make sure any backup power runs safely.
Pre-storm actions
Charge all phones, laptops, and power banks. Fill bathtubs and large pots with water for toilet flushing. Set refrigerator and freezer to coldest settings—they hold longer when pre-cooled. Identify warm gathering rooms for the household. Pull out sleeping bags rated to 0°F.
Portable generator placement
Run portable generators outdoors only, at least 20 feet from any door, window, or vent, exhaust pointed away from the house. Never run in a garage, shed, or basement even with doors open—CO concentration in enclosed spaces reaches lethal levels in minutes.
Alternate heat sources
Wood stoves, pellet stoves, and propane heaters rated for indoor use can keep a room warm during an outage. Kerosene heaters require ventilation and CO detectors. Never use a kitchen stove or oven for heat—it is a CO poisoning and fire risk. Close off rooms you are not heating to concentrate warmth.
Pro Tips
- •Know your neighbors: Exchange phone numbers with immediate neighbors before the storm. Check on elderly or isolated neighbors during and after the event—a working phone plus nearby human contact saves lives.
- •Pre-position snow supplies: Shovels, ice melt, and the snow blower should be at the front of the garage before the storm, not buried behind summer gear. Fuel the snow blower the day before.
- •Document with photos before and after: Quick exterior photos before the storm provide a baseline if wind damage, ice dams, or fallen branches require insurance claims. Phone photos are time-stamped automatically.
- •Test CO detectors right before the storm: Verify all smoke and CO detectors work before you fire up a generator, wood stove, or kerosene heater. This is the weekend when they matter most.
Frequently Asked Questions
How much water should I store for a winter storm?
Store at least one gallon per person per day for three days, plus additional for pets. A family of four needs 12 gallons minimum. Use food-grade containers and rotate stock annually. For winter specifically, also fill bathtubs and large pots before the storm if freezing pipes are a risk — you can use stored water for flushing toilets and washing even if the main supply fails. Do not rely on hot water tank contents unless the power stays on.
Where should I run a generator during a power outage?
Portable generators must run outdoors, at least 20 feet from any door, window, or vent, with the exhaust pointed away from the house. Never run a generator in a garage, shed, basement, or under a deck — even with doors open. CO kills dozens of people each winter from improperly placed generators. Install CO detectors on every level of the home if you use a generator. For permanent backup power, a standby generator with automatic transfer switch is safer and worth the investment in outage-prone areas.
Should I drain pipes if the power goes out?
If an outage lasts more than a few hours and temperatures are below freezing, take preventive action. First, open cabinet doors under sinks on exterior walls. Let faucets drip slowly. If the outage stretches into a second day with no heat, shut off the main water valve and open all faucets to drain pipes, including flushing each toilet. Draining is the only guaranteed protection once interior temperatures fall into the 40s. Restart the system slowly when heat returns, checking every fixture for leaks.
Related Guides
Winter Maintenance Checklist
Complete 20-step guide to winter home care
Prevent Frozen Pipes
Protect plumbing when the power is out during a storm
Prepare Winter Emergency Kit (Fall)
Build a complete 72-hour kit before the season begins
Test Smoke and CO Detectors
Critical if running a generator or alternate heat during an outage