Down here in Madison we have a pretty active LoRa MeshCore network, with some repeaters mounted at a good altitude. 

All summer we have been experiencing tropo band openings and last night we were having two way conversations with Lincoln NE.

We also have regular communication with a few repeaters in the Twin Cities area.

The reason why I bring this up, one of our members developed a tropo map with conditions as recent as 15 minutes.  Some of you may find this data useful. Play around with it and join the RFLab Discord if you feel inclined. 

https://echo.rflab.io/tropo

Cheers

Nicholas Lager, KB9SKW