what do the horizontal lines mean in the cloud cover row in the forecast? Is this fog?

[meltemicaz]

Re: Symbols explained

I am looking for a current explanation of all of the symbols in the fiorecast strip at the bottom of the map. )
Specifically, what do the horizontal lines mean in the 5am column. I spent too much time hunting around for the answer. Frustrating.

[Gkikas LGPZ]

@meltemicaz
Fog/low clouds.