METAR data (airport weather observations) stopped flowing via the NWS at 6 AM this morning. From what I can tell, the outage appears to be at the FAA, which feeds the NWS the data. Will update the news item once the data flow is restored.

Updated 9 AM: Data is flowing again, but observations valid at 7 AM are still missing. Have not seen any official word yet on what may be happening.

Updated 11:30 AM: Outage was resolved, but the 7 AM observations were lost.