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WeatherFlow Tempest Weather System

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  • Manufacturer: WeatherFlow
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Product Information

WeatherFlow TEMPEST

Tempest Weather System

The meticulously designed Tempest Weather System leverages powerful machine learning and state-of-the-art modeling capabilities to provide the most precise, local forecast available - guaranteed. No moving parts, completely wireless, simple installation, with instant online access to weather data via free iOS and Android apps.

While general weather apps abound, the Tempest app is different. It feeds real-time observed weather data from your backyard into a machine learning system to dramatically improve forecast accuracy where it matters most – your home. No other weather app or forecast can compare because they don’t start with the weather conditions at your specific location.

Save time and money with smart home integrations, and protect your family and property with instant alerts to warn of rain, lightning, wind, and much more.



  • Outdoor temp, humidity, dew point, feels like temp.
  • Station pressure and sea-level pressure
  • Wind speed, wind direction, average and gusts
  • Lightning activity (strikes and distance up to 25 miles)
  • Rain onset, intensity, duration and accumulation
  • DeltaT, wind chill, wet bulb temp, air density
  • UV index, brightness, solar radiation
  • iOS and Android apps & free personal weather page
  • Free personal weather page: LIVE EXAMPLE
  • Auto-calibration with Continuous Learning system
  • Works with Alexa, Google Home, IFTTT and more

Tempest Weather System Includes:

  • Tempest sensor device
  • Flat base & pole mount attachments
  • WiFi Hub (base station)
  • Hub power supply
  • Wood screw for temporary mounting



Weight2 lbs)
Dimensions12” x 5” x 5”
MeasurementRangeSampling IntervalAccuracyResolution
Air Temperature-40°C to 60°C (-40°F to 140°F)1 minute± 0.2º C0.1º C
Relative Humidity0 to 100%1 minute± 2%0.01
Barometric Pressure300 to 1100 mbar1 minute± 1 mbar0.1 mbar
Lightning Activity0 to 40 km (25 miles)Event Based± 2 km1 km
Wind Speed0 to 45 m/s (100 mph)3 Secondsgreater of ± 0.5 mph or ± 2%0.04 m/s (0.1 mph)
Wind Direction0 to 359º3 Seconds± 5º
Ambient Light1 to 128,000 Lux1 minute± 100 Lux1 Lux
UV Index0 to 14 UVI1 minute± 0.5 UVI0.1 UVI
Solar Radiation0 to 1900 W/m21 minute± 5%1 W/m2
Rain Rate0 to 400 mm/hour (0-15.7"/hour)1 minute± 10%0.1 mm / hr
Rain AccumulationUnlimited1 minute± 10%0.1 mm
Rain DurationUnlimited1 minute± 2 minutes1 minute
Rain IntensityVery Light to Extreme1 minute  
Rain StartLow to High SensitivityEvent Based  


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