"mystery" static in my area.... S-9 worth of noise!

What do you (not) know about this noise?

Not sure where its coming from. It ususally starts late morning and
lasts up to midnight, its very much on time every day.

With the timeframe you mention, seems like a business establishment -
restaurant/bar?
Any new electric signs in the neighborhood? Can you isolate the noise to
any degree???
I'll assume you have already eliminated your own residence by shutting off
all the power?

I recall one day certain cable TV channels were being obliterated. Then at
night I turned on the AM radio and intermittent noise was 20 over. From the
noise pattern and time of use I had speculated that the noise was caused by
an electric blanket thermostat. This went on for days before I couldn't
take it anymore. I used a small portable receiver and isolated the noise to
my neighbors home. They had recently had a newborn baby. Turns out they had
started using a baby wipes warmer (cheap, made in China, junk, fire
hazard.). As soon at it was plugged in for the evening diaper routines all
hell broke loose.