The decision timeline
A workable weather plan answers three questions in advance: what we shoot instead, who needs to be ready, and when we decide. A typical rhythm on an exterior-heavy week:
- During prep, the 1st AD names a cover set for each exterior day and makes sure its cast are on hold.
- The afternoon before, the AD and UPM check the hourly forecast and talk with the DP about what light is acceptable.
- Before the call sheet goes out (often early evening), they choose: main plan, cover, or a split that shoots cover in the morning and exteriors after a front passes.
- On the day, the AD watches conditions and has a hard deadline, such as "if it's still raining at 9:00A we move to cover."
Worked example
Day 11 of a fictional feature is EXT. VINEYARD - DAY, scenes 70 to 72, 4 6/8 pages, with cast 1, 2, and 4. The forecast gives a strong chance of afternoon storms. Cover is INT. FARMHOUSE KITCHEN, scenes 75 and 76, 2 4/8 pages, cast 1 and 2.
The AD writes the call sheet with the vineyard as main work "WEATHER PERMITTING" and lists the kitchen as cover. Cast 4 is called for the vineyard. If the call goes to cover at 9:00A, cast 4 has worked (and is paid) but won't shoot, and the vineyard's 4 6/8 pages need a new home. The AD checks the day out of days: the next day cast 4 is free is day 14, which is also a vineyard day with only 2 pages. Moving 70 to 72 there makes day 14 carry 6 6/8 pages, which the director and AD agree is too much, so scene 72 gets pushed to day 16 instead.
Mistakes
The worst case is cover that exists only on paper, where the house isn't dressed, cast weren't held, or the location agreement ends that week. Another problem is calling cover too late: once the company has loaded in at the exterior, a switch means a company move as well.
Weather cover also has to account for light as well as rain. A DP may reject a flat overcast sky for a scene that matches sunny coverage already shot. Check sunrise, sunset, and golden hour with the sunrise sunset planner. Some scenes can move to day for night or to a stage, and those are options to raise in prep. The blog covers more at cover sets and weather cover.
