Private Jet and Weather: Fog, Ice, Storms, Wind

Weather and private flights at a glance

Fog: a question of minimum visibility

To take off as to land, the crew needs a minimum visibility, measured by the runway visual range (RVR). What follows depends on a three-part equation: the aircraft, the crew and the airport. At an airport equipped with Category III instrument approaches, with a certified aircraft and a qualified crew, landing is possible with an RVR in the order of 75 metres. Conversely, an airport limited to visual flight rules requires in the order of 5 kilometres of visibility and a ceiling of about 1,500 feet.

This difference explains why the same fog closes a small coastal airfield while major platforms keep operating. When forecast visibility drops below the minima, the crew shifts the departure, or flies to the alternate airport filed in the flight plan. Our teams monitor these situations in real time and reorganise ground transfers where needed, to limit the impact on your schedule.

Ice and snow: de-icing and queues

As soon as frost, ice or snow adheres to the aircraft's surfaces, regulation requires de-icing before take-off, supplemented where necessary by an anti-icing treatment. The operation generally takes 10 to 20 minutes, but its protection has a limited duration: if the wait exceeds this holdover time, the aircraft must be sprayed again or re-inspected. On snowy mornings, queuing at de-icing pads can add 30 to 60 minutes to a departure, according to industry estimates.

Anticipation changes everything: an aircraft kept in a heated hangar overnight does not ice over, and a departure shifted until the morning frost has cleared avoids the operation altogether. This is the kind of trade-off our teams prepare with the operator when winter weather is forecast.

Thunderstorms: re-routing, ground stops and lightning

Storm cells are detected and avoided: the flight plan is amended before departure or in the air to keep a safe distance from cumulonimbus, and airports sometimes suspend ground movements during nearby lightning, to protect ramp personnel. A postponement of one to two hours while the cell passes is the most common scenario.

On lightning itself, the facts are reassuring and worth knowing: according to the FAA, an airliner is struck on average once a year, roughly every 3,000 flight hours, with no consequence in the vast majority of cases, the airframe acting as a Faraday cage. No commercial transport accident has been attributed to lightning since 1963. A strike does, however, require a technical inspection before the next flight, which can delay the aircraft's rotation: it is this inspection, rather than the lightning, that creates delay.

Wind: flight time, crosswind and short runways

Wind first affects flight time: a tailwind shortens the journey, a headwind lengthens it. At altitude, the jet stream can create a difference in the order of one hour between the outbound and return legs of a transatlantic flight, especially in winter. For take-off and landing, it is the crosswind that matters: each aircraft type has a certified limit that the crew will not exceed.

Airfields with short runways or particular approaches, in mountains or on the coast, are more sensitive to it: an unfavourable wind direction can make a runway unavailable for a given aircraft, and require a different airport or a different jet category. For turbulence, often associated with wind at altitude, our article on atmospheric turbulence details what you need to know.

The alternate airport: every flight's plan B

Little known to passengers: every instrument flight is prepared with an alternate airport when the weather at arrival is uncertain, and the fuel needed to reach it is loaded before departure. If conditions deteriorate in flight, the crew does not improvise: it applies a scenario that has already been calculated.

The choice of this alternate is not neutral in business aviation. It reflects the airport's minima, but also the presence of a business aviation terminal, opening hours and the real distance to your final destination. This is precisely the kind of detail a broker checks in advance, so that a possible diversion remains a simple change of plan rather than a problem.

The broker's role: monitoring weather before, during and after the flight

As an independent broker, IBC Aviation compares the aircraft available and organises your flight: weather monitoring is part of that organisation. Our teams check forecast conditions at departure and arrival, confirm hangar or schedule options with the operator, prepare relevant fallback airports and, on the day, reorganise transfers and appointments if the schedule moves. You can discover our approach on the private jet charter page, consult our airport pages or our frequently asked questions about chartering.

Private jet charter with IBC Aviation:

Our teams advise you on the private jet best suited to your itinerary and requirements, and organise your trip to or from your destination. Available 24/7:

• France: +33 1 41 69 88 88
• Switzerland: +41 22 880 28 88
• Dubai: +971 55 303 5161
• Bangkok: +66 81 808 2866
• Email: contact@ibc-aviation.com

Frequently asked questions

Can a private jet take off in bad weather?

Yes, in most cases: rain, moderate snow or a low ceiling do not prevent an instrument flight. The limit is reached when visibility, crosswind or surface contamination minima are no longer met; the crew then shifts the departure, and the decision always rests with the captain.

Why does fog delay some flights and not others?

Because minima depend on the aircraft, the crew and the airport. An airport equipped with Category III approaches allows a landing with about 75 metres of runway visibility, while an airport limited to visual flight requires in the order of 5 kilometres. The same fog can therefore close a small airport and not another.

Is lightning dangerous for a private jet?

No, in the vast majority of cases. According to the FAA, an aircraft is struck on average once a year with no serious consequence, its structure conducting the current along the fuselage. A strike does, however, require a technical inspection before the next flight, which can create a delay.

What is an alternate airport?

It is the fallback airport filed in the flight plan when the weather at destination is uncertain. The fuel to reach it is loaded at departure. If conditions prevent the planned landing, the crew flies to this alternate following a scenario that has already been calculated.

Can weather cause a private jet flight to be cancelled?

Outright cancellation is rare: the usual scenario is a delay, a schedule shift or a diversion to a nearby airport. Only a combination of factors, extreme weather at both departure and arrival, and no alternative compatible with the aircraft, can lead to the flight being postponed.