Officials Investigate FAA National Ground Stop Cause After Historic Flight Disruption

Last updated: November 14, 2026

BACK-TO-BACK SYSTEM FAILURES: FAA Grounds All U.S. Flights Amid National Weather Service Radar Outage, One Day After Massive Microsoft Crash FAA National Ground Stop Cause

PENSACOLA, Fla. — A cascading series of major digital and telecommunications failures over the past 36 hours has disrupted corporate workplaces, weather monitoring, and nationwide air travel—including flights in and out of Pensacola International Airport (PNS).

The sequence began Thursday afternoon with a sweeping Microsoft 365 outage, followed Friday afternoon by a National Weather Service (NWS) radar portal blackout and a rare nationwide Federal Aviation Administration (FAA) ground stop halting every departing commercial flight in the United States.

Because three high-profile systems went offline within two days, speculation has exploded across social media asking whether the United States is under a coordinated cyberattack—with many users pointing fingers at foreign adversaries such as Iran.

Here is a verified breakdown of what happened, what federal officials have confirmed so far, and whether these events are connected.

1. What Is Happening? The 36-Hour Timeline

• Thursday, Nov. 12 (Microsoft 365 & Exchange Crash): Shortly before 1:00 PM EST (12:00 PM CST) on Thursday, Microsoft suffered a widespread server availability failure impacting Exchange Online, Outlook, Microsoft Teams, SharePoint, and Copilot. Over 130,000 incident reports flooded outage trackers at the peak of the disruption, stalling businesses, hospitals, and municipal offices across Northwest Florida into Friday morning.
• Friday, Nov. 13 (National Weather Service Radar Outage): Early Friday afternoon, the National Weather Service posted an emergency banner across regional portals—including the NWS Mobile/Pensacola office—confirming a “National Radar Outage on radar.weather.gov.” While local forecast offices and NOAA Weather Radio remained operational, the public web radar mosaic went dark.
• Friday, Nov. 13 (Nationwide FAA Ground Stop): Around 4:00 PM EST (3:00 PM CST), the FAA issued an unprecedented nationwide ground stop ordering all departing flights at U.S. airports—including Pensacola International Airport—to remain on the ground until further notice, citing “extraordinary circumstances and for reasons of safety.” Transportation Secretary Sean Duffy confirmed that a telecommunications outage knocked out primary communications across all 22 regional Air Route Traffic Control Centers responsible for guiding airborne traffic.

2. Is This a Cyberattack? Is Iran Behind It?

Whenever critical aviation, weather, and cloud infrastructure fail back-to-back, rumors of foreign cyberwarfare spread rapidly online. However, federal officials and tech investigators report zero evidence of a cyberattack or foreign involvement at this time:

• Microsoft Blames an Internal Network Update: Microsoft engineers officially attributed Thursday’s global outage to an internal technical failure stemming from an earlier network capacity upgrade and a subsequent configuration change—explicitly stating they found no indication of malicious cyber activity.
• Homeland Security Addresses Attack Rumors: Speaking outside the White House late Friday afternoon, Department of Homeland Security (DHS) Secretary Markwayne Mullin addressed questions regarding whether a cyberattack or AI was behind the aviation shutdown. Mullin reassured travelers that the incident is currently classified strictly as a telecommunications outage, stating, “There is no evidence yet that this was a nefarious attack; it is just a telecommunication outage, as of right now.”
• No Attribution to Iran or Foreign Actors: Neither DHS, the FBI, the Cybersecurity and Infrastructure Security Agency (CISA), nor the Pentagon has linked today’s FAA or NWS outages to Iran or any foreign nation-state. While federal agencies routinely investigate all possibilities during major infrastructure failures—with Mullin noting officials are “not ruling out anything at this point” until root-cause diagnostics finish—preliminary technical assessments point to telecommunications network failure rather than hacking.

3. Coincidence or Shared Telecommunications Backbone?

While investigators have not confirmed a link to a cyberattack, aviation and IT analysts note that the FAA ground stop and the National Weather Service radar outage may share a common physical or telecom bottleneck.

Both the FAA’s Air Route Traffic Control Centers and NOAA/NWS data distribution hubs rely heavily on specialized federal telecommunications contracts and high-capacity fiber backbones. A major failure at a core telecom switching hub can simultaneously sever FAA air-ground communication relays and disrupt the data feeds feeding radar.weather.gov—creating the appearance of a coordinated attack when the root cause is a single-point telecom infrastructure failure.

What Pensacola Travelers & Residents Should Do Right Now

• Check Flight Status Before Heading to PNS: All departing flights out of Pensacola International Airport are paused under the federal ground stop, causing ripple-effect delays and cancellations nationwide. Passengers should check directly with their airline mobile apps before driving to Airport Boulevard.
• Alternative Weather Radar: While radar.weather.gov is undergoing restoration, local NWS Mobile/Pensacola forecasts remain active, and direct Level II/III Doppler radar feeds remain accessible through third-party weather platforms and NOAA Weather Radio.

This is a developing story. For real-time updates on Pensacola International Airport flight resumptions and federal investigation findings, keep your browser locked to pensacola.newswk.com.

Related: Nationwide FAA Ground Stop Halts Flights as National Radar Portal Outage Hits Weather Service

Related: FAA National Ground Stop Halts Departing Flights Across Pensacola and U.S. Airports

Related: Travel Gridlock Across U.S. as Nationwide FAA Ground Stop and Tech Failures Strand Passengers

Related: FAA Lifts Nationwide Ground Stop After Critical Systems Outage