Weather
Weather modifies generation by source and can damage generators. It runs on the simulation clock and is included in offline catch-up.
Daily weather
- Each game day is assigned a weather state before it starts.
- Weather follows American Midwest patterns and probabilities, built with tunable weights for regional/difficulty variants.
- Routine weather applies globally; generators are affected by type (clouds/rain reduce solar; high winds boost wind).
- Real-world output modifiers are used where applicable.
- Wind hourly fluctuation: on top of the day’s routine condition, wind output is further scaled each in-game hour by a deterministic gust factor. Solar, hydro, ocean, and geothermal are unaffected.
- Forecast: 5-day outlook shown to the player, including severe storm warnings when detected.
Severe storms
After daily weather assignment, the simulation rolls for a severe storm event; at most one severe storm per day.
- Output: affected sources multiply output by the storm’s multiplier for that day (stacks with routine weather).
- Degradation: each affected generator takes the storm’s effectiveness hit immediately (respects the degradation floor).
- Forecast: storms appear in the 5-day forecast when scheduled; icon and tooltip identify storm type and affected sources.
The “While You Were Away” popup reports severe storms endured during catch-up.