Aviation weather in Northern Europe

Long winters dominate the operation: contaminated runways, holdover-time arithmetic, freezing drizzle in the approach and daylight measured in hours rather than a whole working day.

At a glance

Main hazards Snow and contamination, Airframe icing, Crosswind, Low visibility, Mountain wave
Most demanding season November – April
Thunderstorm season June – August
Representative airports ESSA · EFHK · ENGM · EKCH · BIKF
Official sources SMHI aviation weather (Sweden) · Finnish Meteorological Institute

The services linked above are the authoritative source for this region. This page explains what their reports contain; it is not a substitute for an official briefing.

What these hazards mean

Snow and contamination Snow, slush and ice on the runway cut braking action and change the accelerate–stop distance; de-icing adds holdover-time arithmetic.
Airframe icing Supercooled water freezing on the wing, changing its shape and adding weight — worst between 0 °C and −20 °C in visible moisture.
Crosswind Wind across the runway. Every aircraft has a demonstrated limit, and a wet or contaminated surface lowers what is usable well below it.
Low visibility Fog, mist, haze, dust or heavy precipitation cutting visibility below the minimum for the approach in use.
Mountain wave Wind over a ridge sets up standing waves and rotor beneath them — severe turbulence and sustained up- or downdraughts far from the terrain.

METAR decoder

Paste a raw observation and read it in plain language. It runs in your browser — the report never leaves your device, and nothing is stored.

Works with ICAO reports and with the North American SM / inHg variant.

Related guides

De-icing fluid arcing over a wing in the dark before an early winter departure

Winter Operations: De-icing, Holdover Times and Contaminated Runways

Why winter departures collapse into queues, what a holdover time really is, and how a runway condition code changes the numbers a crew has to meet.

Regional aviation weather 9 min read

Rime ice building along the leading edge of a wing in cold cloud

Aircraft Icing Explained: Where It Forms, and Why It Is So Serious

Ice changes the shape of a wing, and a wing is only a shape. Here are the three types, the temperature band that produces them, and what the reports tell you in advance.

Weather hazards in flight 9 min read

A crosswind approach: the aircraft tracking the centreline while pointing somewhere else

Crosswind and Runway Condition: Turning Wind Into a Number

How to convert a reported wind into a crosswind component, what a demonstrated limit actually is, and why a wet runway lowers the usable figure.

Weather and flight planning 8 min read

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Last updated 2026-08-09 by aviationwheater.siten.co · About us

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