Matthew Poole and continuators on Job 28:26

26. When he made a decree for the rain , and a way for the lightning of the thunder.

Which was either from eternity, or at the first Creation, when he settled that course and order which should afterwards be continued. Or, when he maketh: But our Translation seems best to suit with the then in the next Verse, where the sense is compleated.

An appointment, and as it were a Statute Law, that it should fall upon the Earth, and that in such times, and places, and proportions, and manner, as he should think fit, either for correction, or for mercy, as Elihu speaks, Iob 37. 13.

Or path, how it should get out of the thick Cloud in which it was shut up, and as it were imprisoned: or, a course, which should for the future be observed, as to the time, and measure, and ends, and other circumstances belonging to it.