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 stop flights from leaving LaGuardia, to keep traffic safe.
The ground stop began at 23:15 UTC on October 16 and first covered departures from one air traffic control center. At 23:24 UTC it widened to four centers, and at 00:01 UTC on October 17 it was extended until 9:00 pm EDT. It ended at 00:59 UTC, lasting 1 hour 44 minutes.
Impact by airline
Flights to and from LGA scheduled during the ground stop and the hour after it. Delayed means 15+ minutes late.
- Flights
- 169
- Delayed
- 121
- Cancelled
- 8
- Arrivals / departures
- 86 / 83
| Airline | Flights | Delayed / cancelled | Avg delay | On ground | Holding |
|---|---|---|---|---|---|
| Republic Airways YX | 56 | 43 / 0 | 80 min | 8 | — |
| Endeavor Air 9E | 36 | 30 / 0 | 70 min | 11 | — |
| Delta Air Lines DL | 19 | 13 / 0 | 69 min | 8 | — |
| American Airlines AA | 19 | 9 / 1 | 58 min | 7 | — |
| Southwest Airlines WN | 10 | 5 / 4 | 40 min | 2 | — |
| United Airlines UA | 10 | 8 / 0 | 84 min | 3 | — |
| JetBlue B6 | 6 | 6 / 0 | 63 min | 1 | — |
| Air Canada AC | 3 | 1 / 2 | 88 min | 1 | — |
| Frontier Airlines F9 | 3 | 3 / 0 | 94 min | 1 | — |
| Jazz QK | 3 | 2 / 1 | 113 min | — | — |
| Mesa Airlines YV | 1 | 1 / 0 | 201 min | — | — |
| Porter Airlines PD | 2 | 0 / 0 | — | — | — |
| LXJ LXJ | 1 | 0 / 0 | — | — | — |
Delayed 15+ min CancelledOn ground / holding: most seen at once.
Held at origin
Flights to LGA still on the ground at their origin 15+ minutes past their scheduled departure while the stop is in effect; now as of Oct 16, 8:42 PM EDT. Held time is minutes past the scheduled departure.
- Held now
- 25
- Held during the stop
- 36
- Average held
- 1 hr 25 min
- Longest
- 3 hr 39 min
11 from airports in the stop's scope; 25 from outside it, late for other reasons. Of the held flights, 11 since departed.
By origin
| Origin | Scope | Now | Held | Avg | Longest |
|---|---|---|---|---|---|
| BOS Boston | In scope | 3 | 3 | 1 hr 10 min | 1 hr 42 min |
| RIC Richmond | In scope | 2 | 2 | 1 hr 28 min | 2 hr 2 min |
| BUF Buffalo | In scope | 1 | 1 | 3 hr 2 min | 3 hr 2 min |
| CLE Cleveland | In scope | 1 | 1 | 1 hr 28 min | 1 hr 28 min |
| DCA Arlington | In scope | 1 | 1 | 1 hr 22 min | 1 hr 22 min |
| ORF Norfolk | In scope | 1 | 1 | 3 hr 10 min | 3 hr 10 min |
| PIT Pittsburgh | In scope | 1 | 1 | 1 hr 36 min | 1 hr 36 min |
| RDU Morrisville | In scope | 1 | 1 | 50 min | 50 min |
| CHS Charleston | Outside | 2 | 2 | 2 hr 33 min | 3 hr 19 min |
| YUL | Outside | 2 | 2 | 47 min | 52 min |
| ATL Atlanta | Outside | 1 | 2 | 52 min | 1 hr 3 min |
| ORD Chicago | Outside | 1 | 2 | 1 hr 59 min | 3 hr 39 min |
| BHM Birmingham | Outside | 1 | 1 | 2 hr 7 min | 2 hr 7 min |
| CLT Charlotte | Outside | 1 | 1 | 47 min | 47 min |
| DFW DFW Airport | Outside | 1 | 1 | 40 min | 40 min |
By airline
| Airline | Now | Held | Avg | Longest |
|---|---|---|---|---|
| Republic Airways YX | 12 | 12 | 1 hr 46 min | 3 hr 19 min |
| Endeavor Air 9E | 7 | 10 | 1 hr 33 min | 3 hr 22 min |
| Delta Air Lines DL | 4 | 8 | 42 min | 1 hr |
| American Airlines AA | 1 | 1 | 1 hr 2 min | 1 hr 2 min |
| Jazz QK | 1 | 1 | 42 min | 42 min |
| Southwest Airlines WN | — | 2 | 1 hr 31 min | 1 hr 42 min |
| JetBlue B6 | — | 1 | 41 min | 41 min |
| United Airlines UA | — | 1 | 3 hr 39 min | 3 hr 39 min |
Inbound in the air and diversions
Flights to LGA that had departed and not yet landed, at each arrivals board sample while the stop is in effect, and inbound flights that landed somewhere else instead.
- In the air now
- 84
- Peak in the air
- 84
- Diverted
- 0
In the air to LGA
In the air now (Oct 16, 8:39 PM EDT), by airline
- Delta Air Lines DL20
- Republic Airways YX18
- American Airlines AA12
- Endeavor Air 9E10
- United Airlines UA8
- JetBlue B66
- Southwest Airlines WN6
- Frontier Airlines F92
Diversions
No inbound flight has been seen diverting so far.
Impact by region
Arrivals by the air traffic control center they departed from. Held: departures from that center were stopped.
| Center | Status | Arrivals | Delayed | Cancelled |
|---|---|---|---|---|
| Cleveland Center (ZOB) | Held | 8 | 6 | 0 |
| Boston Center (ZBW) | Held | 5 | 5 | 0 |
| Washington Center (ZDC) | Held | 5 | 3 | 0 |
| New York Center (ZNY) | Held | 1 | 1 | 0 |
| Outside the US centers | Not held | 14 | 11 | 2 |
| Atlanta Center (ZTL) | Not held | 9 | 8 | 0 |
| Miami Center (ZMA) | Not held | 8 | 7 | 0 |
| Chicago Center (ZAU) | Not held | 8 | 5 | 0 |
| Jacksonville Center (ZJX) | Not held | 5 | 5 | 0 |
| Indianapolis Center (ZID) | Not held | 5 | 4 | 0 |
| Fort Worth Center (ZFW) | Not held | 7 | 2 | 1 |
| Houston Center (ZHU) | Not held | 3 | 2 | 1 |
| Kansas City Center (ZKC) | Not held | 3 | 3 | 0 |
| Denver Center (ZDV) | Not held | 2 | 2 | 0 |
| Memphis Center (ZME) | Not held | 2 | 1 | 0 |
| Minneapolis Center (ZMP) | Not held | 1 | 0 | 0 |
Aircraft at the airport
Peak 43 on the ground, 0 holding nearby.
On the ground Holding nearby
Timeline
Every change published while the ground stop was in effect, as seen each minute.
Ground stop issued at LGA for thunderstorms, until 8:15 pm EDT. Departures held from ZDC.
Reason changed to thunderstorms.
Scope widened: departures now also held from ZNY, ZOB, ZBW.
New advisory issued.
Read the advisory ↗Reason changed to thunderstorms.
Reason changed to thunderstorms.
Extended until 9:00 pm EDT.
New advisory issued.
Read the advisory ↗Reason changed to thunderstorms.
Ground stop ended after 1 hr 44 min.
Advisories
The air traffic control advisories issued for this ground stop, as published.
ATCSCC ADVZY 185 LGA/ZNY 10/16/2026 CDM GROUND STOP
CTL ELEMENT: LGA ELEMENT TYPE: APT ADL TIME: 2357Z GROUND STOP PERIOD: 16/2347Z - 17/0100Z CUMULATIVE PROGRAM PERIOD: 16/1700Z - 17/0359Z DEP FACILITIES INCLUDED: (Manual) ZDC ZNY ZOB ZBW CYHZ CYOW CYUL CYYZ CYTZ CYQB PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 1632 / 165 / 74 NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 2591 / 238 / 118 PROBABILITY OF EXTENSION: MEDIUM IMPACTING CONDITION: WEATHER / THUNDERSTORMS COMMENTS:Original advisory ↗
ATCSCC ADVZY 178 LGA/ZNY 10/16/2026 CDM GROUND STOP
CTL ELEMENT: LGA ELEMENT TYPE: APT ADL TIME: 2318Z GROUND STOP PERIOD: 16/2308Z - 17/0015Z CUMULATIVE PROGRAM PERIOD: 16/1700Z - 17/0359Z DEP FACILITIES INCLUDED: (Manual) ZDC ZNY ZOB ZBW CYHZ CYOW CYUL CYYZ CYTZ CYQB PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 488 / 159 / 49 NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 825 / 167 / 82 PROBABILITY OF EXTENSION: MEDIUM IMPACTING CONDITION: WEATHER / THUNDERSTORMS COMMENTS: SURFACE CONGESTION.Original advisory ↗
ATCSCC ADVZY 173 LGA/ZNY 10/16/2026 CDM GROUND STOP
CTL ELEMENT: LGA ELEMENT TYPE: APT ADL TIME: 2312Z GROUND STOP PERIOD: 16/2220Z - 17/0015Z CUMULATIVE PROGRAM PERIOD: 16/1700Z - 17/0359Z DEP FACILITIES INCLUDED: (Manual) ZDC PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 640 / 114 / 80 NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 995 / 165 / 124 PROBABILITY OF EXTENSION: MEDIUM IMPACTING CONDITION: WEATHER / THUNDERSTORMS COMMENTS: NO ROUTES.Original advisory ↗