You've got a pretty big security hole here.
You aren't doing any sanity checking on the
city/state input -- and Geo::WeatherNOAA isn't
doing it for you. Given a bogus city/state combo,
make_noaa_table is perfectly happy to output a large
chunk of HTML which indicates that there was a Network
problem retrieving a URL constructed using the users bogus
state/city.
If a malicious user hit this CGI repeatedly using
giberish as the city/state, they could easily fill
up your disk in no time.
PS: even if you aren't worried about that, you should be scrubbing your input at least a little to make sure i don't enter something like "../../../../../../../../../" as my city..
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