What happened
AI-written · may contain mistakes. Written from the advisory text and weather only.
Cause: Clouds sat very low over San Francisco airport, about 100 to 200 feet up, with mist reducing visibility, so air traffic control held departures to keep flights spaced safely.
The ground stop began at 18:28 UTC on November 9, 2026, with departures held from several air traffic control centers. At 18:56 UTC it widened to two more centers and was extended until 12:00 pm Pacific time. It ended at 19:52 UTC, after 1 hour 24 minutes.
Impact by airline
Aircraft seen on the ground at SFO and holding nearby, by airline.
| Airline | On ground | Holding |
|---|---|---|
| United Airlines UA | 12 | — |
| American Airlines AA | 3 | — |
| JetBlue B6 | 3 | — |
| Delta Air Lines DL | 2 | — |
| SkyWest Airlines OO | 2 | — |
| Air Canada AC | 1 | — |
| All Nippon Airways NH | 1 | — |
| Alaska Airlines AS | 1 | — |
| Cathay Pacific CX | 1 | — |
| Korean Air KE | 1 | — |
| Singapore Airlines SQ | 1 | — |
| Southwest Airlines WN | 1 | — |
Impact by region
Air traffic control centers whose departures to the airport were held.
| Center | Status |
|---|---|
| Albuquerque Center (ZAB) | Held |
| Denver Center (ZDV) | Held |
| Los Angeles Center (ZLA) | Held |
| Salt Lake City Center (ZLC) | Held |
| Oakland Center (ZOA) | Held |
| Seattle Center (ZSE) | Held |
Aircraft at the airport
Peak 25 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 SFO for low ceilings, until 11:30 am PST. Departures held from ZLA, ZLC, ZOA, ZSE.
Scope widened: departures now also held from ZDV, ZAB.
New advisory issued.
Read the advisory ↗Extended until 12:00 pm PST.
Ground stop ended after 1 hr 24 min.
Advisories
The air traffic control advisories issued for this ground stop, as published.
ATCSCC ADVZY 066 SFO/ZOA 11/09/2026 CDM GROUND STOP
CTL ELEMENT: SFO ELEMENT TYPE: APT ADL TIME: 1852Z GROUND STOP PERIOD: 09/1812Z - 09/2000Z CUMULATIVE PROGRAM PERIOD: 09/1500Z - 09/2159Z DEP FACILITIES INCLUDED: (6West) ZLA ZLC ZDV ZOA ZSE ZAB PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 4956 / 271 / 127 NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 5919 / 301 / 152 PROBABILITY OF EXTENSION: MEDIUM IMPACTING CONDITION: WEATHER / LOW CEILINGS COMMENTS: STOP EXPANDED AND EXTENDED DUE TO LOW CEILINGS AND CURRENT AIRBORNE VOLUME. EXPECT GDP REVISION TO EXIT.Original advisory ↗
ATCSCC ADVZY 063 SFO/ZOA 11/09/2026 CDM GROUND STOP
CTL ELEMENT: SFO ELEMENT TYPE: APT ADL TIME: 1822Z GROUND STOP PERIOD: 09/1812Z - 09/1930Z CUMULATIVE PROGRAM PERIOD: 09/1500Z - 09/2159Z DEP FACILITIES INCLUDED: (1stTier) ZLA ZLC ZOA ZSE PREVIOUS TOTAL, MAXIMUM, AVERAGE DELAYS: 2209 / 193 / 100 NEW TOTAL, MAXIMUM, AVERAGE DELAYS: 3225 / 271 / 147 PROBABILITY OF EXTENSION: MEDIUM IMPACTING CONDITION: WEATHER / LOW CEILINGS COMMENTS:Original advisory ↗