The core is the ground.
Temperature, humidity, pressure and wind at two metres, from stations that cost less than a bicycle. We draw them white because they are the baseline every model leans on.
- Cadence10 min
- Calibrated94.6 %
- Countries71
SOTAVENTO // CITIZEN WEATHER COMMONS
The sky,
measured from
4,112 back gardens.
Every point in the sphere is a station someone bolted to a fence, a roof or a harbour mast. Every point in the ring is a balloon that climbed past the clouds this week. Together they report every ten minutes, and the forecast is free.
- Ground stations
- 4,112
- Soundings / week
- 1,300
- Median latency
- 38 s
Rotation 0.12 rad/s · tilt −24°
01 — Two populations
One object, two altitudes.
The ring is the air above it.
Volunteer launch sites release a latex balloon at dawn. It reports every second until it bursts, somewhere near thirty kilometres, and that profile is what turns readings into a forecast.
- Launch sites186
- Median burst29.4 km
- Recovered61 %
02 — From the field, 12:00 UTC
Six of the 4,112.
- STV-0412Ullapool, Wester RossRooftop9.4°C1003.1hPaWSW 31km/hPressure falling 2.6 hPa in three hours.
- STV-1187Ponta Delgada, AzoresHarbour mast19.8°C1021.7hPaNE 12km/hThe high that will reach Lisbon on Sunday.
- STV-2290Ouarzazate, DrâaSchool yard27.2°C1012.4hPaS 8km/hDust in the 4 µm channel since noon.
- STV-3051Abisko, LaplandSki hut−3.1°C998.6hPaW 22km/hFirst snow of the season, 6 cm overnight.
- STV-3778Valdivia, Los RíosFarm gate12.6°C1016.0hPaN 17km/hFront arriving; dew point 0.4° below air.
- STV-4006Hilo, Hawai‘iGarden pole24.1°C1014.9hPaENE 19km/h41 mm of rain since dawn, trade-wind showers.
03 — Join
Put one more point on the globe.
A station kit is a sensor mast, a solar cell and a radio the size of a matchbox. We post it, you choose the spot, and your garden is in the next model run.
- Kit€ 89, or free for schools
- InstallAbout 40 minutes
- PowerSolar, 9 days in the dark
- Your dataOpen, CC BY 4.0