so ive been noticing 17m and 15m have been doing some really strange things the past couple weeks. some days i wake up and the solar flux is sitting around 180 and i think ok today should be great, fire up the radio and i cant raise anything in europe to save my life. then other days flux is like 155 and im working japan and australia back to back on 100 watts. i dont totally get what im missing here.

i know solar flux isnt the whole picture, the A and K index stuff matters too right? but even when those look decent it seems hit or miss. had a buddy tell me to pay more attention to what time of day i was trying and honestly that helped a little but still feels random. is there some resource you guys actually use that helps you predict when the good openings will happen or do you just kind of check the cluster and hope for the best

yeah the flux number alone will drive you crazy if thats all you watch. the K index is huge — anything above 3 or 4 and the higher bands basically fall apart even if flux looks great. geomagnetic storms mess with propagation way more than people realize when theyre first getting into DX chasing.

what i actually use day to day is a combo of pskreporter to see whos hearing what in real time, and dxmaps for the cluster spots filtered by band. that tells me way more than any forecast. if im seeing spots from JA to the east coast on 15m i just get on. you can also check the solar terrestrial dispatch site for a more detailed breakdown but honestly after a few months of watching the patterns you start to get a feel for it. the late afternoon greyline is almost always worth sitting on 17m for even on mediocre days.

im pretty new too so take this for what its worth but i stumbled onto the WWV broadcasts on 5, 10, and 15 MHz that give propagation updates and that was kind of a lightbulb moment for me. they read out the solar flux and geomagnetic field conditions a few times a day. its old school but its kinda cool to actually hear it on the radio instead of just looking stuff up online haha

also somebody in my club mentioned that 15m tends to follow the sun path so if youre trying to work europe from the US east coast the window is usually morning hours, not afternoon. i have no idea if thats totally accurate but it did seem to match up with what i was seeing