The chest freezer outage no one warned us about
Three days without power, half a quarter of beef on the line. The temperature math, the dry-ice run, and what we keep in the freezer now.
We bought half a steer in October. Two hundred pounds of beef in a chest freezer in the garage. In February the ice storm took out our power for 76 hours. The freezer was full. Nobody had told us what to do with a full freezer in a long outage.
Here's the math nobody mentioned. A full chest freezer holds temperature for about 48 hours if you don't open it. Half-full, it's more like 24. Why? Mass. Frozen mass is its own cold reservoir. The fuller the freezer, the longer it stays cold.
Hour 36, we had a decision: open it and check, or trust the math. We trusted the math. Hour 48, we drove 22 miles to the only supplier with dry ice still in stock. $40 for 30 lbs. We layered it on top in cardboard, taped the lid, and gave ourselves another 24 hours.
Hour 72, the power came back. We opened the freezer at hour 76. Everything was hard. We checked five packages — internal temp 28°F, well below the 40°F threshold for spoilage. We lost nothing. We learned a lot.
What we keep in the freezer now: a thermometer with a probe and a digital readout. $15 at any hardware store. The probe stays in the freezer; the readout sits on top. You can check temp at a glance without opening the door. If you have meat in a chest freezer, this is the cheapest insurance you'll ever buy.