WeatherFlow documentation (#23478)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>
Co-authored-by: J. Nick Koston <nick@koston.org>

source/_integrations/weatherflow.markdown

@@ -0,0 +1,58 @@
+---
+title: "WeatherFlow"
+description: "Instructions on how to integrate your WeatherFlow tempest into Home Assistant."
+ha_release: "2023.10"
+ha_category: 
+  - Sensor
+  - Environment
+ha_platforms:
+  - sensor
+ha_iot_class: "Local Push"
+ha_config_flow: true
+ha_codeowners:
+  - '@natekspencer'
+  - '@jeeftor'
+ha_domain: weatherflow
+---
+
+This integration is a local-only WeatherFlow integration that reads weather data from all [WeatherFlow Tempest](https://weatherflow.com/tempest-weather-system/) compatible weather station on the local network.
+
+<div class='note'>
+You may see slight deviations between the values reported in Home Assistant and the values in the WeatherFlow App. This is because the WeatherFlow app considers both forecasts and neighboring weather stations in addition to the local data used in this integration.
+</div>
+
+{% include integrations/config_flow.md %}
+
+## Sensors
+
+This integration will expose the following sensors:
+
+- Air density
+- Air pressure
+- Dew point
+- Feels like
+- Humidity
+- Illuminance
+- Irradiance
+- Lightning average distance
+- Lightning count
+- Precipitation
+- Precipitation amount
+- Precipitation type
+- Temperature
+- UV index
+- Vapor pressure
+- Wet bulb temperature
+- Wind direction
+- Wind direction average
+- Wind gust
+- Wind lull
+- Wind speed
+
+## Diagnostic sensors
+
+Additionally the following diagnostic sensors are available:
+
+- Battery voltage
+- Signal strength
+- Uptime