Ground stop at Boston Logan (BOS), Nov 12, 2026

EndedThunderstorms halt Boston Logan departures for 58 minutes

Started: Thu, Nov 12, 3:26 PM EST20:26 UTC
Ended: Thu, Nov 12, 4:24 PM EST21:24 UTC
Duration: 58 min
Cause: thunderstorms

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What happened

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

Cause: Thunderstorms around Boston Logan led air traffic control to hold departures heading there until conditions improved.

The ground stop began at 20:26 UTC on November 12, 2026, and was scheduled to run until 4:30 pm Eastern. It ended at 21:24 UTC, after 58 minutes, and departures from four air traffic control centers were released.

Impact by airline

Aircraft seen on the ground at BOS and holding nearby, by airline.

Airline	On ground	Holding
Republic Airways YX	7	—
American Airlines AA	2	—
Copa Airlines CM	1	—
Delta Air Lines DL	1	—
Aer Lingus EI	1	—
SAS SK	1	—
Swiss LX	1	—
Emirates EK	1	—

Impact by region

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

Center	Status
Boston Center (ZBW)	Held
Washington Center (ZDC)	Held
New York Center (ZNY)	Held
Cleveland Center (ZOB)	Held

Timeline

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

Nov 12, 3:26 PM EST
Ground stop issued at BOS for thunderstorms, until 4:30 pm EST. Departures held from ZDC, ZNY, ZOB, ZBW.
Nov 12, 3:28 PM EST
Reason changed to thunderstorms.
Nov 12, 4:24 PM EST
Ground stop ended after 58 min.

Advisories

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

ATCSCC ADVZY 100 BOS/ZBW 11/12/2026 CDM GROUND STOP

CTL ELEMENT: BOS
ELEMENT TYPE: APT
ADL TIME: 2019Z
GROUND STOP PERIOD: 12/2009Z - 12/2130Z
CUMULATIVE PROGRAM PERIOD: 12/1800Z - 13/0459Z
DEP FACILITIES INCLUDED: (Manual) ZDC ZNY ZOB ZBW  CYHZ CYOW CYUL
 CYYZ CYTZ CYQB
PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 1231 / 181 / 49
NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 2809 / 298 / 112
PROBABILITY OF EXTENSION: MEDIUM
IMPACTING CONDITION: WEATHER / THUNDERSTORMS
COMMENTS: SURFACE CONSTRAINTS FOR DIVERTS. THUNDERSTORM IMPACTS.

Original advisory ↗

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 BOS 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 BOS, every 30 minutes while active and once more after the end. Delayed means 15 or more minutes late at BOS; 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 BOS 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 BOS, 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.