Iterate over a copy of locals.
Iterate over a copy of locals.

This way we don't iterate over a dictionary that we are actively
changing.

Unidata/MetPy,jrleeman/MetPy,dopplershift/MetPy,Unidata/MetPy,ahaberlie/MetPy,ahaberlie/MetPy,ShawnMurd/MetPy,ahill818/MetPy,deeplycloudy/MetPy,dopplershift/MetPy,jrleeman/MetPy