The number of US flights cancelled on Friday 13 November has risen to 1,913, with a further 10,494 delayed, according to FlightAware figures reported by ABC7 San Francisco as of 6.04pm ET (11.04pm UK).
That is a steep increase on the at least 400 cancellations and 8,000 delays CBS News reported from FlightAware at 5.01pm ET. On those figures, cancellations have more than quadrupled in about an hour.
The new count has not been independently checked. ABC7 does not say whether it covers the whole of Friday or only flights affected by the nationwide ground stop. The earlier FlightAware figures were whole-day totals, which include disruption recorded before the FAA's order.
ABC7 also reports that every flight at Raleigh-Durham (RDU) was delayed or cancelled on Friday evening, and says it expects the national numbers to rise overnight.