Helpful Ham Maps
When the screen goes blank white, click the refresh key or F5
The map linked to the right represents current VHF (2m maybe 6m) tropo propagation. https://vhf.dxview.org
Below is the current MUF map for HF. MUF is "Maximum Usable Frequency". This should not be confused with "Critical Frequency". For an easy explanation on both watch the Youtube video below the MUF map.