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What do DMI weather warnings mean?

Three levels, one rule: follow the advice

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Short answer

DMI issues weather warnings for Denmark in three categories. Category 1 (rough weather) means the weather may affect your surroundings and outdoor plans, category 2 (dangerous weather) means it may disrupt traffic and supplies, and category 3 (very dangerous weather) means a high risk that it affects you and society, so you should follow the authorities' advice. Warnings can be issued up to 36 hours before the weather arrives, and early notices appear on dmi.dk and in the DMI app up to five days ahead. Warnings cover strong wind, cloudbursts, heavy rain, snow, ice, dense fog, heat and high water.

Weather and seasons

Why

  1. Warnings help ferries and trains plan cancellations in time.
  2. Early notices give you up to five days to change plans.
  3. The level tells you how seriously to take the weather.

Details

A storm warning requires a mean wind above 24.5 m/s, and a hurricane warning a mean wind above 32.6 m/s.

Tip

When a level 2 or 3 warning is out, check ferry, train and flight times before you leave.

What may differ

A warning area is at least one municipality, so the weather where you stand can be milder or worse.

Common misconception

A weather warning only matters if you are at sea.

What actually happens

Warnings cover land and coastal areas, and they can affect roads, trains, ferries, power and outdoor plans.

People also ask

  • What is a cloudburst in Denmark?
  • When does DMI warn of a heat wave?
  • Is there a DMI app in English?

Sources

This answer is for reference only. Weather varies a lot from year to year, so check the DMI forecast before you travel.

Weather and seasons
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