As a user, I would like to know how dangerous the cold is

[mgwalker]

Description

NWS has this really great table showing onset times for frostbite at different wind chills:
https://www.weather.gov/bou/windchill

It would be super cool if the weather.gov site could show the time to frostbite when the wind chill is below -18ºF (that appears to be the 30-minute cutoff from the chart), and maybe some kind of styling to indicate the dangerous situation.

Questions and Considerations

Acceptance Criteria

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