Adjust handling of full_day_record so that we don't end up with two times plotted on the same station plot.
Adjust handling of full_day_record so that we don't end up with two times plotted on the same station plot.

git-svn-id: acf0ef94bfce630b1a882387fc03ab8593ec6522@321 150532fb-1d5b-0410-a8ab-efec50f980d4

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