Checklist L3 · 3 months Event · Winter storm & extended outage

Winter storm 3-month system

A 3-month winter-readiness system — deep pantry, redundant heat, water security, and the routines that make a long cold season uneventful.

Three months of winter-storm readiness is no longer a checklist. It is a system. The household has redundant heat, a deep pantry, water security, and a maintenance routine that runs from September through April. This is the posture that treats a 10-day outage as inconvenience, not crisis. The work below is the system, the routine, and the inventory it runs against.

The load-bearing domains

What this combination actually depends on

Every event–duration combination weights the nine domains differently. Here are the two or three that decide the outcome for this one.

Shelter & Warmth

Roof, heat, dry.

Three months of winter is a thermal-envelope question. Insulation, air sealing, and zone heating decide the fuel bill and the failure mode.

The shelter & warmth domain →

Power & Light

When the grid goes.

Redundant heat sources, redundant fuel storage, and redundant electricity. Three sources, never one.

The power & light domain →

Food

Eat well, store smart.

A 3-month deep pantry is a real inventory system with rotation, not a stack of buckets in the basement.

The food domain →

The 3 months list

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Common questions

Questions that come up

How much food is a 3-month deep pantry for a family of four?

Roughly 740,000 calories — about 90 days × 4 people × 2,050 calories. In practical terms: 200–300 pounds of rice and grains, 100–200 pounds of beans and legumes, 50–100 cans of various proteins, freeze-dried produce and dairy, cooking fats and salt. A real deep pantry is organized by category, dated, and rotated quarterly through normal household meals.

What's the most efficient way to heat one room during a long winter outage?

A modern propane heater rated for indoor use, ducting a single room of 200–300 sq ft, with the doors closed and the household sleeping in the room. Roughly one 20-lb propane tank every 2–3 days at moderate run. Pair it with battery-powered CO detectors and you can run the household out of one room for weeks.

Do I need a transfer switch with my generator?

For a household running essentials beyond extension cords, yes. A transfer switch — manual or automatic — connects the generator to the house panel and lets you power circuits (furnace fan, well pump, fridge, lights) without running cords through windows. A licensed electrician installs one in a day; it is the difference between a backup that works and a backup that frustrates.

Run the numbers

How much water and food, exactly, for this duration

The list above tells you what to stock. The calculators below tell you how much — sized to your household and this duration.