Ground stop at Philadelphia (PHL), Nov 12, 2026

EndedThunderstorms halt American Airlines departures at Philadelphia for 56 minutes

Started: Thu, Nov 12, 4:18 PM EST21:18 UTC
Ended: Thu, Nov 12, 5:14 PM EST22:14 UTC
Duration: 56 min
Cause: thunderstorms

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What happened

AI-written · may contain mistakes. Written from the advisory text and weather only.

Cause: Thunderstorms in the area led air traffic control to hold American Airlines departures from Philadelphia, with flash flood warnings also issued.

The ground stop began at 21:18 UTC on November 12, 2026, and ended at 22:14 UTC, after 56 minutes. Departures were held from 20 air traffic control centers, including ones in Los Angeles, Atlanta and Canada. The stop ended just before its scheduled 22:15 UTC finish.

Impact by airline

No airline data was collected for this ground stop.

Airline numbers appear after the first sample, within about 20 minutes of the start.

Impact by region

Air traffic control centers whose departures to the airport were held.

Center	Status
ZLA	Held
ZAU	Held
ZLC	Held
ZTL	Held
ZDC	Held
ZNY	Held
ZHU	Held
ZJX	Held
ZFW	Held
ZOB	Held
ZDV	Held
ZOA	Held
ZSE	Held
ZBW	Held
ZMA	Held
ZKC	Held
ZME	Held
ZID	Held
ZAB	Held
ZMP	Held

Timeline

Every change published while the ground stop was in effect, as seen each minute.

Nov 12, 4:18 PM EST
Ground stop issued at PHL for thunderstorms, until 5:15 pm EST. Departures held from ZLA, ZAU, ZLC, ZTL and 16 more.
Nov 12, 5:14 PM EST
Ground stop ended after 56 min.

Advisories

The air traffic control advisories issued for this ground stop, as published.

ATCSCC ADVZY 119 PHL/ZNY 11/12/2026 CDM GROUND STOP

CTL ELEMENT: PHL
ELEMENT TYPE: APT
ADL TIME: 2115Z
GROUND STOP PERIOD: 12/2105Z - 12/2215Z
FLT INCL: CARRIER AAL ONLY
DEP FACILITIES INCLUDED: (ALL+CZY_AP) ZLA ZAU ZLC ZTL ZDC ZNY ZHU ZJX
 ZFW ZOB ZDV ZOA ZSE ZBW ZMA ZKC ZME ZID ZAB ZMP  CYHZ CYOW CYUL CYYZ
 CYTZ CYQB
PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 0 / 0 / 0
NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 2207 / 252 / 55
PROBABILITY OF EXTENSION: MEDIUM
IMPACTING CONDITION: WEATHER / THUNDERSTORMS
COMMENTS: AAL AND SUBS ONLY CARRIER REQUEST

Original advisory ↗

Where flights were held

Departures to PHL were held from 20 centers (ALL+CZY_AP).

Chance of extension: MEDIUM

Weather at the time

METAR, weather alerts and SIGMETs at the airport during the stop.

When it started

VFR

METAR KPHL 122054Z 32003KT 10SM FEW015 SCT038 BKN085 BKN200 16/12 A2937 RMK AO2 WSHFT 1941 RAE13GRE02 TSE40 SLP944 P0015 60051 T01560117 55006 $ · observed Nov 12, 3:54 PM EST

Tornado Watch · Tornado Watch issued November 12 at 3:27PM EST until November 12 at 7:00PM EST by NWS Mount Holly NJ
Flash Flood Warning · Flash Flood Warning issued November 12 at 4:16PM EST until November 12 at 6:45PM EST by NWS Mount Holly NJ
Flash Flood Warning · Flash Flood Warning issued November 12 at 3:27PM EST until November 12 at 7:30PM EST by NWS Mount Holly NJ
Flash Flood Warning · Flash Flood Warning issued November 12 at 3:01PM EST until November 12 at 7:00PM EST by NWS Mount Holly NJ

Over the airport: Convective SIGMET 70E.

Latest during the stop

VFR

METAR KPHL 122154Z 30007KT 10SM FEW015 SCT038 BKN100 BKN200 16/12 A2938 RMK AO2 SLP949 T01560117 $ · observed Nov 12, 4:54 PM EST

Flash Flood Warning · Flash Flood Warning issued November 12 at 4:22PM EST until November 12 at 7:30PM EST by NWS Mount Holly NJ
Flash Flood Warning · Flash Flood Warning issued November 12 at 4:20PM EST until November 12 at 7:00PM EST by NWS Mount Holly NJ
Flash Flood Warning · Flash Flood Warning issued November 12 at 4:16PM EST until November 12 at 6:45PM EST by NWS Mount Holly NJ

Philadelphia (PHL) live status →Every ground stop at PHL →Replay Nov 12, 2026 on the map →Read the full advisory ↗What is a ground stop? →

How it is measured

Status, timeline, cause and held centers: the national airspace status feed, checked every minute, and the air traffic control advisories it links to.
Delays by airline and region: departures and arrivals at PHL 30 or more minutes late, by their estimated delay against the schedule, sampled every 10 minutes while the stop is active and once more after it ends.
Totals and cancellations: arrival and departure boards for PHL, every 30 minutes while active and once more after the end. Delayed means 15 or more minutes late at PHL; cancelled is the airline's cancelled status; codeshares count once. Flights scheduled from the start until an hour after the end are counted.
Held at origin: the same arrivals boards, which carry each flight's scheduled and actual departure from its origin. A flight is held when it is still scheduled, not departed, 15 or more minutes past its scheduled departure at a sample taken during the stop. In scope: its origin is in a held center or listed facility; flights from elsewhere are late for other reasons.
Inbound in the air: the same arrivals boards. At each board taken during the stop, a flight to PHL is in the air when it has departed (en route, or with an actual departure time) and not landed, cancelled or diverted; one still shown in the air over an hour past its arrival estimate, or departed more than 18 hours earlier, is treated as stale and left out.
Diversions: an inbound flight marked diverted during the stop or the wrap-up after it (not one marked before it could have departed), or one still shown in the air 30+ minutes past its arrival estimate that ADS-B (by its ICAO call sign) then found on the ground at another airport, not its origin. The diversion airport is the airport ADS-B found it at, else the updated destination. Cancellations never count. Regional flights flown under another call sign can't be found on ADS-B, so their diversion airport may be unknown.
Aircraft on the ground and holding: ADS-B positions around PHL, every 5 minutes; the airline is read from the call sign. Holding counts airline flights only (passenger, regional and cargo), not private, military or medical flights.
Weather: METARs, SIGMETs and weather alerts.
News: headline links filtered to this airport and these days; we show titles and links only.

Data sources are listed on the credits page.