Weather for fearful flyers... the first thing that you have to remember about the weather is that contrary to what you'd think ... the weather has less influence on a plane, than on road traffic. Paradoxically, it's because we can fly in bad weather that we suffer delays. It's easy to get a plane on and off the ground ... the problem is getting the pasengers to and from the plane and airport.

Bad weather at the airport

Bad weather at the airport

So on a day when you’d have to leave the car in the garage and stay at home … the airlines continue operating, albeit in a limited way. That’s not to say that there aren’t some long delays … of course there are but it takes time to clear a runway of snow, and when it’s foggy planes can’t land as frequently … but they are  still flying. Things slow down, but they don’t grind to a halt like they do on the roads.

Top Tips about weather:
  • A plane cannot land or take off if the visibility or wind is outside legal limits.
  • A plane cannot make an approach to land if the weather (see our Premium Course for information)
  • A plane cannot fly within (see our Premium Course for information) miles of a thunderstorm.
Weather is caused by the changing states of air. The air in the atmosphere has these changeable properties:
  • Pressure
  • Moisture content
  • Temperature
Here is what these properties cause:
  • Pressure differences cause wind.
  • Moisture content determines the type and amount of cloud.
  • Temperature determines how much moisture  is stored by the air. And of course how hot or cold it is.
When these conditions change, so does the weather. Remember:
  • Weather doesn’t affect the way an aircraft flies.
  • Turbulence may be uncomfortable but is not dangerous.
  • Aircraft do not drop or plummet thousands of feet because of turbulence .
Anxious flyers are generally interested in four main aspects of the weather, first fog, secondly the wind affecting the take-off and landing, thirdly thunderstorms and of course, turbulence, but that is dealt with elsewhere on this site.

Fog is caused when the air contains a lot of moisture and the temperature drops, and the moisture instead of remaining invisible … which it usually is … condenses into water vapour. Fog will clear when the temperature rises to re-absorb the moisture.
Sometimes however, early morning sun will help to mix the air and actually make the fog thicker for a while. See more on Premium about the effects of fog and how aircraft systems allow landings in zero zero conditions.

When landing in fog, the pilot confirms that the autopilot is going through the correct sequence until the aircraft touches down (see a plane landing in bumpy weather). All that has to be done then is for the reverse thrust to be applied, until (see our Premium Course for information)
The wind is caused by the difference in pressure between air masses. The air will always move from high to low pressure and that movement we feel as wind. The greater the difference in pressure, the stronger the wind will be.
Many fearful flyers believe that the wind has more influence on an aircraft than it really does.
On the ground, in a crosswind, the natural tendency for the aircraft is to (see our Premium Course for information) and as a passenger you may feel the aircraft moving to the left and right slightly as the controls are adjusted to keep to the centre of the runway.
When the aircraft is airborne, the wind has no effect other than to influence the direction the plane is travelling in. It does not have any effect on controlling the aircraft or the way it flies. Crosswinds are not (see our Premium Course for information).





Aircraft are not allowed, by law, to fly into thunderstorms and when passing them must avoid them by at least 20 miles.  You may get the impression that you are in one because of the turbulence and, at night you will see lightning and sometimes you will be in cloud as well.
But the weather radar will show the pilots very clearly where any storms are and allow the pilot time to steer around them.

Snow and ice does not (see our Premium Course for information)for aircraft. All major airports have de-icing facilities available in the form of de-icing trucks or gantries through which the aircraft taxis to have all the ice and snow removed. The runways are cleared and then an accurate report is given to pilots as to the exact deprth of snow/ice/water  that remains on them.
The pilots use special performance criteria which limit the aircraft if the contamination exceeds a certain amount. What this means in practice is that planes will take off at a reduced weight.

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