Copenhagen's forecast yesterday said "rain at 14:23 in Nørrebro postal code 2200, light drizzle for Østerbro 2100, sunny on Islands Brygge until 15:47." It was right. Down to the minute.

Seventeen thousand citizen-run weather stations now cover the city—balconies, rooftops, windowsills, bike racks. Open protocol, local mesh network, zero cloud dependency. Just neighbors measuring what's happening outside and sharing it.

Meteorologists complained it would be chaos. Then quietly started citing our data. Turns out amateurs with good sensors and local knowledge beat satellites when you're predicting a ten-minute bike commute.

Lars has four stations. Checks them obsessively. His corner of Frederiksberg now has its own microclimate profile. He's unbearable about it. Also never gets caught in the rain.

The national weather service tried to "harmonize data standards." We said no. They shrugged and embedded our API.

Weather is just something we all measure now. Like time, but wetter.

— Igor

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