I'm seeing a lot of QRM on 40 now in the snowstorm. Static bursts.
Just to pick a nit:
That would be QRN
("N" for noise).
QRM is interference ("M" for man-made).
Mel - KS2G
I always remembered it by "N for Natural noise, M for Man-made noise". In reality, the M and N don't mean anything. But if a little mnemonic helps, great.