Weather phenomena

Recent weather conditions are frequently evaluated based on meteorological observations. In the last evaluation, weather conditions observed by the following stations have been examined between 01-01-2012 and 24-06-2017:

Both stations are located in the Campus of the National Technical University of Athens, Weather phenomena are defined as follows:

wind_chill

Low felt air temperature

The felt air temperature on exposed skin due to wind (wind chill), defined only for temperatures lower than 10°C and wind speed above 5km/h. It is expressed in temperature-like units in order to be directly comparable with the air temperature.

Main sensor: -2.0 or below on average for at least 20 minutes (see timeseries) and
Control sensor: 0.0 or below on average for at least 20 minutes (see timeseries)
frost

Frost

Main sensor: 0.0°C or below for all values within 8 hours (see timeseries) and
Control sensor: 2.5°C or below for all values within 8 hours (see timeseries)
heat

Heat

Main sensor: 32.0°C or above on average for at least 24 hours (see timeseries) and
Control sensor: 31.0°C or above on average for at least 24 hours (see timeseries)
windy

Windy

Main sensor: 7.5m/s or above on average for at least 20 minutes (see timeseries) and
Control sensor: 6.5m/s or above on average for at least 20 minutes (see timeseries)
heat_index

High felt air temperature

Human-perceived equivalent temperature (heat index) calculated from air temperature and relative humidity. The formula used is considered valid only for temperatures higher than 27°C and relative humidities higher than 40%. It is expressed in temperature-like units in order to be directly comparable with the air temperature.

Main sensor: 36.0 or above on average for at least 20 minutes (see timeseries) and
Control sensor: 32.0 or above on average for at least 20 minutes (see timeseries)
storm

Storm

Main sensor: 7.0mm or above in total within 10 minutes (see timeseries) and
Control sensor: 5.0mm or above in total within 10 minutes (see timeseries)
heavy_rainfall

Heavy rainfall

Main sensor: 40.0mm or above in total within 12 hours (see timeseries) and
Control sensor: 35.0mm or above in total within 12 hours (see timeseries)

Compiled: 2017-06-24 18:59:14