These three weather factors have the strongest influence on today’s forecast compared with an average day in the season.
Bolzano−Verona pressure gradient (overnight)
1.5 hPa
Works against Peler
The overnight Bolzano−Verona pressure difference is the strongest pressure driver in the Peler model: it indicates whether air is being pushed south along the lake.
Overnight humidity
77.3 %
Works against Peler
Overnight humidity describes the air mass and indicates whether cloud or fog may form and alter Peler’s development.
Wind at 100 m (overnight)
1.8 km/h
Supports Peler
Overnight wind at 100 metres shows whether the broad flow supports Peler, overrides it or mixes the lower atmosphere.
Show all other factors (6)
Overnight cloud cover
24.4 %
Supports Peler
Cloud slows overnight cooling. A clear night supports the temperature and pressure differences from which Peler develops.
Innsbruck−Verona pressure gradient (overnight)
2.4 hPa
Supports Peler
The overnight Innsbruck−Verona gradient describes the broad pressure drive across the Alps while Peler is developing.
Po Valley–Alps heating contrast
6.4 °C
Works against Peler
The temperature contrast between Verona and Innsbruck represents the different rates of heating in the Po Valley and Alpine region, and therefore the thermal drive.
Innsbruck−Verona pressure difference (morning)
2.5 hPa
Works against Peler
The Innsbruck−Verona gradient describes the broad pressure distribution between the Alps and Po Valley. A very strong northerly gradient can suppress Ora; a favourable distribution lets it develop more freely.
Previous-afternoon solar radiation
766.0 W/m²
Works against Peler
Previous-afternoon sunshine affects how strongly the land and mountain slopes heated up and the conditions in which the overnight circulation begins.
Evening and overnight rain
0.1 mm
Supports Peler
Evening or overnight rain affects cooling, changes the air mass and often disrupts Peler’s development.
Whether a factor raises or lowers the probability comes from the statistical model. This shows a statistical relationship, not proof of a single physical cause. All listed factors feed into the forecast; the three strongest are highlighted.