- Send a flash message to Admiral Fletcher. This is not, repeat, not main body. Expect enemy carrier forces strike tomorrow from behind storm front...
- Via northwest, as previously anticipated. Signed, Nimitz.

14 seconds sound clip from the Midway (1976) movie soundboard.

You can hear this line at 01:01:24.731 in the Blu-ray version of the movie.

Quote context

[...]

- 11 ships, course 090, speed 19 knots. But what kind of ships? First transmission said main body, but there was no mention of any carriers.

- That PBY, Strawberry 9, was at the end of his 700-mile leg when he sent that message main body. It could be Nagumo's carriers are following the large ships he reported.

- Well, they may be just beyond his horizon, Admiral.

- If they are, Fletcher's in the wrong place. He's too far north.

- He'd have to move right now at flank speed to get within striking distance before sunset.

- But if Nagumo's carriers are where we figured coming in behind this storm front...

- Fletcher'd be caught between two forces.

- Yes, if we let him head for that main body sighting.

- Send a flash message to Admiral Fletcher. This is not, repeat, not main body. Expect enemy carrier forces strike tomorrow from behind storm front...

- Via northwest, as previously anticipated. Signed, Nimitz.

- Well, that settles that. CINCPAC must think the PBY sighted only Kondo's invasion force.

- But if it's Nagumo's attack force with his carriers, and his scouts find us before we find them...

- Captain Buckmaster, sound general quarters.

- Weather is clearing, sir. We could not have timed it better.

[...]