Weather and roads

On a day when the weather changes how a student gets to class or work, the Advocate says so before they leave: what is coming, how much earlier to leave for the first class or shift, and what to bring. On ordinary days it says nothing.

flowchart LR
  zip[Student's ZIP] --> town[Rounded to the town, about a kilometer]
  town --> egress{Egress block: api.weather.gov only}
  egress --> points[Points lookup] --> link{Forecast link on api.weather.gov?}
  link -- no --> quiet[Say nothing]
  link -- yes --> fc[Today's forecast]
  fc --> impact{What does it mean for the trip?}
  impact -- ordinary --> quiet
  impact -- rain, storms, very cold or hot --> note[Note: leave a little earlier, bring this]
  impact -- snow or ice --> heads[Heads-up: leave 25 to 30 minutes earlier]
  first[First class or shift today] --> note & heads
Weather Severity Leave earlier
Ice, freezing rain, sleet plan around it 30 minutes
Snow, likely plan around it 25 minutes
Storms or heavy rain worth a note 10 to 15 minutes
10 degrees or colder worth a note 10 minutes
95 degrees or hotter worth a note bring water
Anything else nothing said

Nothing about the student leaves: only the town's coordinates. If the weather service is down, slow or points anywhere unexpected, the Advocate says nothing rather than guess.

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