Sam Weston on Nostr: Can someone who knows radio things please explain to me why once every couple of ...

Can someone who knows radio things please explain to me why once every couple of weeks I go from being able to pick up no #Meshtastic nodes to loads as far away as 36 miles?

Does 868MHz have the ability to bounce off clouds or something? It seems to happen for a few hours and then nothing (although always a weak signal).