Storms and severe weather in Project Zomboid

Build 42 uses a simulated climate, so storms build from fronts rather than appearing at random. The Automated Emergency Broadcast System (AEBS) on the radio reads a forecast every hour covering about two days ahead, including wind level and warnings for thunderstorms, tropical storms and blizzards when your sandbox settings allow them. Storms can also garble radio reception while they pass.

Tropical storms do exist in the game's warning list, but we could not find a reliable description of how they differ in play from a strong thunderstorm. Treat one as a long, very wet, very windy storm until you see it yourself. For how to tune in, see radio; for normal rain, temperature and the climate system, see weather.

Opinion Check the AEBS once each morning. A two day warning is enough to finish a loot run, top up fuel and get animals under a roof.

A code read of Build 42.19 on pzfans.com gives the clearest numbers (one source). Zombies start with a base vision radius of 20. Fog takes away up to 7 (fog intensity times 7), rain takes away up to 2.5, and darkness stacks on top, but the result never drops below 10. So the worst weather roughly halves how far a zombie can see. It never hides you outright.

Hearing is where sources disagree. The same code read says rain cuts zombie hearing by up to about a third and fog by up to 10 percent, so full rain plus full fog leaves hearing at about 0.57 of normal. The projectzomboid.wiki stealth guide says rain and fog affect vision only and that hearing still works. Both agree that sprinting, smashing windows and gunfire stay loud. Thunder is described as slightly masking zombie footsteps for you, which works against you as much as for you.

Pair this with stealth and the zombie senses page: crouch, walk, and use the storm to get closer than you could on a clear day.

Rain collection and boiling are covered on the water page.

Rain wets your clothes steadily, and duration matters more than intensity: a long drizzle soaks you as surely as a short downpour. Wet clothes lose insulation, and wind lowers the effective temperature, so a mild 5 C day with wind can feel close to freezing. A soaked character in wind picks up cold moodles fast and risks a cold, as described on the health page.

Blizzards stack all of this: below freezing, rain turns to snow, outdoor collectors stop filling, walking in snow burns more calories and outdoor crops stop growing. The winter guide covers insulation, heating and food stores in detail.

• Raincoats and waterproof outer layers slow soaking; cotton and denim soak fastest. See clothing.
• Change into dry clothes indoors and let wet ones dry before you go out again.
• Long gray, wet days also wear on mood; keep books or other distractions ready, as covered under mood.

Fog and heavy rain shorten your own view, so you spot hordes later. Headlights help you see the road but do not cut fog, and they make you visible. Snow hides crashed cars and corpses on the road, and night plus snow under the Build 42 lighting makes it easy to drive or walk into trouble. We found no published figures for traction loss in rain or snow, so drive as if it exists.

Opinion In fog or a storm, keep speed low enough to stop for a wreck you see late, avoid unfamiliar back roads, and plan routes on the driving page in clear weather first. On foot, stay near buildings so you can get dry and break line of sight.

Opinion Bad weather is a tool once you are dressed for it.

• Close-range looting. With zombie sight cut toward 10, a crouched approach in rain or fog lets you reach doors and windows unnoticed. Keep runs short so you do not get soaked through.
• Slipping past groups. Walk around a crowd at a wider distance than their reduced sight; do not sprint, since noise still carries.
• Water. Every storm is free water. Have collectors built before the season turns; see seasons for when rain and snow come.
• Base days. Blizzards and long storms are the time for indoor crafting, cooking and reading, not travel.
• Know the limits. Weather never fully hides you, and the hordes you cannot see are still there.