The final 72 hours: what changes now
This is when planning turns into operations. Stop optimizing theoretical climatology and start comparing actual forecast windows, access and safe mobility.
72 hours out
Compare multiple model runs rather than reacting to one cloud map. Confirm that Plan A, B and C remain reachable and legal. Re-check accommodation and vehicle constraints.
48 hours out
Narrow the chase radius. Buy water, food and fuel before local demand peaks. Download offline maps and save the coordinates of every realistic fallback.
24 hours out
Prioritize persistent cloud patterns and route reliability. A forecast that improves by a few percentage points may not justify a long overnight drive.
Eclipse morning
Make one calm decision, leave early and preserve safety margin. Once in a good clear area inside totality, avoid unnecessary last-minute movement caused by tiny model changes.