One part shipping forecast/oracle/number station in format, another part enigmatic image and sound composition by the artist Jared Pappas-Kelley.

https://www.invertextant.com/portents

Sequence 4:

step 1: 17; colour: 6

step 2: 73; colour: 2

step 3: 41; colour: 5

step 4: 47; colour: 3

step 5: 4; colour: 3

17 73 41 47 4