ALDI Sempre GT-WS-10s Operating Instructions Manual page 43

thunderstorm
heavy snowfall
Please note: Even if the temperature alarm is not displayed, there is always a risk
of frost/black ice with temperatures around freezing point. The outside sensor
can only measure the local temperature at the installation site.
light snowfall
Frost warning - When the radio sensor measures a
temperature of between + 1 °C and -1 °C, a risk of
frost exists and a snowflake symbol flashes.
If the temperature falls below -1 °C for a constant
period of time, the snowflake symbol is displayed
steadily.
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