Climaviso

What it does

Climaviso collects every weather warning AEMET has published since 2018: heat, cold, rain, storms, wind, snow, fog and dust. Each municipality inherits the warnings from its alert zone.

You can open any town and see how many days had yellow, orange, or red warnings. See if heat clusters in August, if rain hits hard in autumn, how this year compares to previous ones.

What it's for

• Compare places - Up to 5 municipalities side by side. Useful if you're looking at where to move or buy.
• Follow your places - Save up to 5 locations and get a morning email only when there's an orange or red warning.
• See the rankings - Which towns have the most or fewest warning days by phenomenon type.
• Understand local climate - Not just average temperature, but which days the weather was extreme enough for an official warning.

What it doesn't do

Climaviso doesn't forecast the weather. It doesn't say whether a place is "safe" or "dangerous". A warning doesn't mean damage occurred - it means AEMET considered conditions worth alerting about.

Two towns in the same alert zone share the same data. Actual weather varies within a zone.

Where the data comes from

Warnings come from AEMET's public archive, Spain's national weather agency. AEMET divides Spain into alert zones and publishes warnings under the Meteoalerta Plan.

Municipal boundaries come from INE. The map uses OpenStreetMap.

How it's calculated

What a warning day is. A day counts if AEMET had any warning active in the zone that day. Several warnings on one day still count once, at the highest level: a day with yellow warnings plus one red is a red day.

Warnings are counted once. AEMET repeats, updates, and sometimes cancels its warnings. We keep the final version of each warning and drop the ones an update or cancellation replaces. One long warning is never counted several times.

What you'll see on each town page:

• Warning days - how many days had a warning, by level (yellow, orange, red).
• Typical year - the median days per year: what a normal year looks like, without one extreme year skewing it.
• Streak - the longest run of consecutive warning days.
• Phenomena - rain, storms, wind, heat, cold, snow, fog and Saharan dust, counted separately.
• Similar zones - three zones with a similar mix of phenomena, so you can compare against more than the Spanish average.

Warnings are not damage. A warning means AEMET judged conditions deserved an alert, not that anything bad happened. We don't measure damage, risk, what a home is worth, or whether a place is good to live in. Two towns in the same warning zone share the same data.

Warnings are forecasts, not measurements. AEMET warns when it expects a threshold to be crossed. A red day can end without damage, and a storm can hit on a day with no warning. AEMET's criteria also change over the years: some year-to-year differences are methodology, not climate.

Since when. The full history starts on 18 June 2018, as far back as the public archive goes. Today's and tomorrow's warnings refresh four times a day.

Contact

climaviso@gmail.com