[Collins] NNNN

[Robert Lawson]

Fellows,

Where does the text "NNNN" originate (radio history) in text messages 
below the "signature" line? I see NNNN used sometimes, depending on the 
particular NWS forecaster, with the National Weather Service text 
messages about active tropical storms/hurricanes (which I might add, 
seem to be frequenting my area lately HI).  Also there is sometimes the 
"$$" being used along with the "NNNN"

Just wondering.

Regards,

Robert WPE4FGR W4RL Pensacola Florida