what does this jargon mean

[radioenthusiast2011]

while listening to airband i hear them often say what sounds like "QRN-H"

what does this mean?

[2E1IIP]

They refer to weather conditions such as barometric pressure (QNH) and magnetic bearing from a station (QDR)

[thedeerhunter270]

http://en.wikipedia.org/wiki/QNH

[radioenthusiast2011]

thanks chaps