walk - a question

[CarolinePar]

so about 12:40 Seattle time I went for a walk...

that's what I told my family I did.

Got back in at 2:30pm.

No calls...

no "where you' been", etc

so I got to wondering - if the police don't officially get involved until someone has been missing for 24 hours, at what point do YOU worry if someone is gone longer than a *resonable* length of time?
Not wanting to scare anyone on this end but was just wondering...tar:

[FreddysFingers]

12 hours and that's if they do pick up calls, answer emails or when other have had the same bad luck.