Entering zip code often gets wrong country

[bklang]

I have noticed this in staging: when I enter a zip code for 19013, I get a city in Italy, and when I enter zip code 10001 it comes back as Vilnius, Latvia. Consider:

• The user has already told us their country via profile in many cases, so use that when available
• This behavior may change when we fix #535
• When in doubt, is there a default we should use? United States?

[lmerriam]

This is a very annoying issue that a lot of users run into!

I believe (far from sure) that we separately query Google maps to turn the user-entered string into a proper location before feeding it to the weather API. That easily could have changed since initial implementation however.

When in doubt, is there a default we should use? United States?

I would recommend warning the user and resetting to the original location (or absence of location) rather than defaulting. Non-local weather reports won't be useful to them, and we'd want them to know that the location didn't take so they can try to remedy it.