Fœhn

Foehn indicators for Valais and the Alps, 4-day forecast.

2 graph(s) pinned to the home page.

Understanding the foehn How it forms, why it reaches the ground, and what eleven years of measurements show.

Pressure Lugano − Zürich

Lugano−Zürich

+0.5hPa
Neutral
Foehn possible Northerly flow Altdorf (km/h) - - - forecast

Lugano−Zurich pressure, simple version

Lugano−Zurich · simple

+0.5hPa
Neutral
Friday 04.09Saturday 05.09Sunday 06.09+8+40-4-8South foehnNorth foehn

Pressure Domodossola − Sion

Domodossola−Sion

+0.1hPa
Neutral
Foehn possible Northerly flow - - - forecast

Pressure Visp − Evionnaz

Visp−Evionnaz

-0.5hPa
Neutral
Down-valley Up-valley Visp (km/h) - - - forecast

700 hPa wind over the southern crest

700 hPa · ~3000 m

+1.8km/h
Neutral
Southerly flow Northerly flow - - - forecast

North−south temperature at 2500 m

ΔT nord−sud · 2500 m

+0.6°C
Neutral
South colder South warmer - - - forecast

MeteoSwiss foehn index

MétéoSuisse · 12 stations

Visp no foehn 3/5

as of 21:10

  • Direction at Gütsch (90-240°) 149°
  • Direction on site 253°
  • Wind or gust 14 km/h
  • Humidity below the limit 42.1 %
  • Potential temperature -5 K
Sion no foehn 3/5

as of 21:10

  • Direction at Gütsch (90-240°) 149°
  • Direction on site 274°
  • Wind or gust 10.4 km/h
  • Humidity below the limit 37.5 %
  • Potential temperature -5 K
Aigle no foehn 2/5

as of 21:10

  • Direction at Gütsch (90-240°) 149°
  • Direction on site 139°
  • Wind or gust 2.9 km/h
  • Humidity below the limit 82 %
  • Potential temperature -13.7 K

The wind in the Rhone valley

Viège → Evionnaz

Viège 639 m W 14/21
Varen 747 m W 13/21
Chalais 520 m S 5/9
Sion 482 m W 10/19
Evionnaz 482 m N 7/13
down-valley windlight drainagevalley breeze

No established down-valley wind on the valley floor right now.

Wind aloft at Gütsch/Andermatt

Gütsch ob Andermatt 2287 m

+9.0km/h
Neutral
Southerly flow Northerly flow

Rhone valley stability

Sion 482 m / Gd St-Bernard 2472 m

0.57°C/100 m
Neutral
- - - Valley mixed - - - Cold air on the floor

Rain in Ticino

Locarno / Sion

0.0mm
Neutral
Locarno (south) Sion (north)

Foehn signature at Sion

Sion

gust Temperature Humidity - - - forecast
Understanding the foehn How it forms, why it reaches the ground, and what eleven years of measurements show.

Forecasts: Open-Meteo. On Lugano − Zürich and Visp − Evionnaz the solid part comes from MeteoSwiss measurements. On the other graphs it comes from the model: no source covers Domodossola, and a 700 hPa wind cannot be measured from the ground.