Yellow, Orange, Red: What Iceland's Weather Warnings Mean

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You open your weather app the night before a long drive, and there it is: a yellow box, or worse, an orange one, sitting right on top of the part of Iceland you're heading to. What does it actually mean? Can you still drive? Should you cancel, wait, or just leave earlier?

I'll be honest with you. I grew up here, and I still check the warnings like a nervous parent checks a sleeping baby. They're one of the most useful tools you have as a driver, but only if you know how to read them.

So let me walk you through it: how the color coded system works, what each color means for your driving day, how far ahead warnings show up, and what to do about your route and your rental car when one pops up.

If you want to know how to check the roads themselves, our guide to reading Iceland's road conditions map covers that step by step. This post is all about the warnings that come before the road reports.

Iceland's Impact Based Warning System in a Nutshell

Our weather has moods. Luckily, someone writes them down.

On 1 November 2017, the Icelandic Meteorological Office (IMO, Veðurstofa Íslands) launched a new, color coded warning system. The big change? Warnings became impact based.

The old system fired off a warning when the weather crossed fixed climate thresholds, like a certain wind speed. The new one asks a much more practical question: what will this weather actually do to people, roads and services?

That means forecasters look at more than numbers. They weigh the time of year, where the weather will hit, and what's going on in society. Each color combines two things:

• How likely the forecast weather is
• How big an impact it's expected to have

Warnings are issued by the IMO together with Civil Protection and other relevant partners, much like the color coded warnings you'll find in other European countries.

For you as a driver, this is great news. A warning isn't just "it'll be windy." It's the experts telling you the weather is likely to cause problems, and roughly how serious those problems could be. Trust me, that's worth more than any weather app's cute little cloud icon.

Yellow, Orange, Red: What Each Color Means When You're Driving

Think of it as a traffic light, except the weather is the one driving.

The IMO's official impact matrix describes each level. Here's what they say, and what I think it means in practice when you've got a car and a route.

Yellow warning: take it seriously, plan carefully

According to the IMO, a yellow warning means a medium or high likelihood of medium impact weather that can have localized effects. Here's the bit drivers should underline: this weather could affect travel between different areas of Iceland. It's potentially hazardous if precautions aren't taken, and it can cause damage or accidents.

Yellow warnings are fairly common, and they shouldn't cause systematic disruption to transport, public services or infrastructure.

What that means for your driving day:

• Don't shrug it off just because it's common. "Travel between areas" is exactly what a road trip is. A mountain pass or an exposed stretch of coast can be far worse than the cozy town you start in.
• Check the timing. A yellow warning might only cover a few hours. Leaving earlier, or later, can make a huge difference.
• Check the wind and the roads before you go. Strong gusts are a real risk for tall vehicles and campers.
• Have a plan B. Know where you could stop and wait if things turn out worse than you expected.

One more thing. The IMO says a yellow warning can also flag the possibility of very severe, high impact weather 3–5 days ahead. So a yellow box several days out might be an early hint of something bigger. Keep an eye on it.

Orange warning: expect disruption, change your plans

The IMO's matrix calls this level "amber" in English, but on the map and in most news coverage you'll see it as orange. Don't let that confuse you; it's the same thing.

It means a medium or high likelihood of medium or high impact weather that will likely have a short term impact on transport, public services and infrastructure. It may cause damage or accidents and can be a threat to life if precautions aren't taken.

These warnings happen every year, and the IMO's advice is to show caution and make the necessary arrangements.

What that means for your driving day:

• Treat it as a reason to change plans, not just to drive carefully. If the warning covers your route during your driving window, the smartest move is usually to wait it out or rearrange your day.
• Expect road closures. A short term transport impact often means closed passes, canceled flights and ferries, and tough driving even where roads stay open.
• Stay somewhere sensible. If you're already on the road, aim to be at your accommodation, or in a town with services, before the warning period starts.
• Check again, and again. Warnings change as the forecast firms up, and orange warnings can be updated, extended or upgraded as the weather gets closer.

Red warning: don't drive

A red warning means a high likelihood of extreme weather causing high societal impact. The IMO describes it as extreme weather with very hazardous conditions that can threaten life and property, with a high likelihood of nationwide disruption to transport, public services and infrastructure.

The IMO's advice is to pay close attention to all available information and updates from the IMO and Civil Protection.

What that means for your driving day:

• Don't plan to drive in the warning area during the warning period. Full stop. I mean it.
• Stay put. Stay at your accommodation, follow local instructions, and let the storm do its thing without you.
• Follow official updates. Red warnings are rare and serious, and the authorities will share advice as things develop.

Quick reference

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Warnings Up to 5 Days Ahead: How to Use the Early Notice

One of my favorite things about this system is that warnings can be issued up to 5 days in advance. The IMO splits them into two horizons:

• 3–5 days ahead: warnings are issued for the whole country.
• 1–2 days ahead: warnings are issued for smaller forecasting areas.

So the picture gets sharper as the weather gets closer. A nationwide warning a few days out says "something's coming, keep an eye on it." A regional warning for tomorrow tells you where, and roughly when.

Here's how I'd use that on a road trip:

3–5 days out: Note it, don't panic. Look at which days look worst and think about how your itinerary could flex. Could you swap a long driving day for a rest day in one place? Could you tackle the most exposed stretch earlier?

1–2 days out: Now it gets specific. Check which forecasting areas are covered and compare them with your route. Look at the start and end times. This is when you decide whether to move a driving day, change your overnight stop, or take a different route.

On the day: Check again in the morning. Warnings can be upgraded, downgraded or shifted in time. Then check the roads themselves before you set off.

This early notice is exactly why I keep telling people a flexible itinerary is gold in Iceland, especially between fall and spring. Build in a spare day or two, and a warning becomes an inconvenience rather than a ruined trip. Ask me how I learned that one. (Actually, please don't.)

What to Do About Your Rental Booking and Route

A warning on your travel days raises some very practical questions. Here's how I'd think them through.

If you haven't picked up the car yet

• Don't rush out of Keflavík into a warning. If an orange or red warning covers your first driving day, consider staying near the airport or in Reykjavík for the first night and starting your road trip once it's passed.
• Contact your rental supplier early if your plans change. If you need to move your pickup time or date, get in touch as soon as you know, and check your booking terms for what applies.
• Know what's covered. Read what your insurance does and doesn't cover before a stormy drive, so there are no surprises if the wind picks up.

If you're already on the road

• Rearrange your days, not your safety. Driving through an orange warning just to make a hotel booking is rarely worth it. If you need to change a night, call your accommodation as early as you can.
• Pick a sheltered base. If a warning is coming, try to wait it out in a town with fuel, food and a place to stay, not at a remote guesthouse at the end of a mountain road. Charming, sure. Fun during a storm? Not so much.
• Rethink the route. Sometimes a different road, or simply a different time, avoids the worst of it. Check the roads before deciding.
• Returning the car on time. If a warning threatens your drive back to the airport, think about moving closer the day before so you're not stuck on the far side of a closed road. If a road closure means you can't make your return time, contact your rental supplier as soon as possible.

Choosing the right car in the first place

If you're traveling between fall and spring, the car you choose matters. Our guide to renting a car in Iceland in winter explains what to look for. And for the basics of handling snow and ice once you're driving, see our general winter driving tips.

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Where to Watch for Warnings: vedur.is Alerts and Safetravel

You don't need a dozen apps. Two official sources cover almost everything.

vedur.is alerts

The IMO publishes all its warnings on its website. The English weather alerts page on vedur.is shows current warnings on a map of Iceland's forecasting areas. Open it and check:

• The color for the areas on your route
• The time window: when the warning starts and ends
• The description: what kind of weather is expected (wind, snow, rain, and so on)
• The coming days, not just today

Make it a habit to check the alerts page every evening and every morning of your trip. I do it with my morning coffee. Some people read the news; I read the wind.

Safetravel

Safetravel, run by the Icelandic Association for Search and Rescue, posts current travel alerts at the top of its site and has practical winter driving advice. Its guidance echoes the IMO's: check the forecast at least once a day, remember that strong wind, snow, rain and drifting snow can make driving difficult or dangerous even when the roads look clear, and if conditions get worse than you're comfortable with, wait in a safe place for the weather to calm down.

Safetravel also recommends keeping your plans flexible and being ready to change or cancel them if conditions become unsafe. Honestly, that's the whole mindset that makes warnings easy to live with.

And then check the roads

A warning tells you what the weather is likely to do. The road conditions map tells you what's actually happening on the road right now. Use both. Our road conditions map guide walks you through reading it.

In an emergency, call 112.

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The Bottom Line

Iceland's color coded warnings are designed to tell you not just what the weather will be, but what it will do. In short:

• Yellow: common, but can affect travel between regions. Plan carefully and stay flexible.
• Orange: happens every year and is likely to disrupt transport. Change your plans.
• Red: extreme weather and nationwide disruption. Don't drive.

Check the vedur.is alerts every evening and morning, use the up to 5 day notice to keep your itinerary flexible, and always check the roads before you set off. Do that, and a warning becomes just another part of planning your Iceland road trip. Góða ferð!

Sources

• Icelandic Meteorological Office: IMO: Impact based color-coded warnings on web (1 Nov 2017)
• Icelandic Meteorological Office: Impact Matrix of the Icelandic Meteorological Office (PDF)
• Icelandic Meteorological Office: Weather alerts
• Safetravel: Winter driving