A national radar outage would do it. This would be a bigger story. Everyone needs it to forecast. However it doesn&#x27;t seem to actually be offline. So I don&#x27;t think it was a very long outage if it did go down.

I can still access NOAA radars just fine.

Radar outage:<a href="https:&#x2F;&#x2F;www.weather.gov&#x2F;afc&#x2F;radaroutage" rel="nofollow">https:&#x2F;&#x2F;www.weather.gov&#x2F;afc&#x2F;radaroutage</a>

Homeland Security saying &quot;telecommunications&quot; outage. But nothing more at this point...

&quot;upgrade to cds. make no mistakes&quot;

No, my guess is cyber attack from a state we&#x27;ve been making false accusations against.

I think I remember seeing an article here about air traffic controller systems moving off of 3.5&quot; diskettes. Related ?

Does anyone have any insight on this? Currently at LGA and they’re continuing boarding procedures, but they’re not giving us any updates otherwise.

No.&quot;January 11, 2023. All U.S. departing flights were halted for several hours after a computer outage crashed the FAA&#x27;s Notice to Air Missions (NOTAM) pilot notification system&quot;9&#x2F;11, 2023 and today are the only three times.

9&#x2F;11 was different, that also required all planes to land, more or less, as quickly as possible and not continue to their destinations (unless that was timely, I suppose). This one is a departure ground stop, no more planes going up. Planes in the air haven&#x27;t been ordered to land yet.

no, there was one in 2023 when a pilot notification system went down

Is this the first such case since 9&#x2F;11?

Could this be related to what caused Outlook to go down?

First, the Microsoft outage. Now this.Extraordinary.

Some more discussion on source: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641</a>

Something with frequency of ATC signals?

Related:<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641</a>

earlier discussion: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=50489641</a>

FAA issues nationwide ground stop due to "extraordinary circumstances"