Looks like a norther.

1 seconds sound clip from the The Treasure of the Sierra Madre movie soundboard.

You can hear this line at 02:00:26.536 in the Blu-ray version of the movie.

Quote context

[...]

- What? What?

- ¿Acuerdate de lo que dijeron los sacos? Acuerdate.

- Dijeron que tenian unos costalitos con arena. Que eran para que pesaran mas las pieles cuando las vendieran.

- He said he heard the bandits talking while they were waiting to be shot. He said that they thought it was bags of sand hidden among the hide to make it weigh more when Dobbs went to sell them in Durango.

- Where are they?

- Si, ¿donde estan los sacos?

- En el convento por el paredon viejo. Alli es donde dijeron los bandidos que abririan la carga.

- They're in the ruins outside town. Come on.

- Looks like a norther.

- Busca a los costalitos.

- Encontre uno! Encontre uno!

- Aqui hay otra bolsa.

- Oh, laugh, Curtin, old boy. It's a great joke played on us by the Lord, or fate, or nature, whatever you prefer. But whoever or whatever played it certainly had a sense of humor. Ha!

[...]