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A common gotcha is the fact that braking actions usually come from a snowtam decode which is part of the notam system.
Although a braking action may be appended onto a METAR the time of the report will be found in the NOTAMs and will most likely not be the time of the METAR issued.
The reference to good in the braking will relate to the time it was issued in the notam. If it is actively precipitating the chances are the braking action has deteriorated.
It is possible to see a braking action that was reported 10-12 hours earlier still valid because it hasnt been updated.