Field reports and storm case studies

Case studies are built from the record Calchis kept while an event happened, not written afterwards from memory. Each one grows as the record does and says what it cannot see.

Storm case studies

Every Atlantic storm that puts US states under a tropical watch or warning gets a case study of its own, from the day its first watch goes up. It lists every National Hurricane Center advisory, every Weather Service watch and warning by state and then by FEMA region, and how far ahead of landfall each state was warned. Where Calchis made a forecast, the case study sets it beside what followed, and where the platform froze a damage estimate at landfall, it shows the estimate as published, never recomputed.

Tornado field reports

One page per month: every tornado the Weather Service surveyed, and for each, whether it touched down inside a tornado warning that was already in effect, and how long that warning had been out. When none was, the report says whether a severe thunderstorm warning covered the spot, whether it said a tornado was possible, and how long after touchdown a tornado warning came.

The time is from the earliest warning in effect at touchdown, not the nearest one, and only the touchdown point is tested. It is not the Weather Service's own verification, which scores warnings with rules of its own. The report is rebuilt every hour, because surveys keep arriving for days after an outbreak.

Using them

They are written to be lifted into a briefing or an after-action review: every figure carries its source, and every table has a plain-text equivalent. Times are UTC.