Contents area
Current natural hazards situation in Switzerland
Teaser
Explanation of the danger level 1:
- Avalanches: no danger
- Earthquakes: may be perceptible
- Floods: transport disruption and damage are not normally to be expected.
- Forest fires: small fires cannot be entirely ruled out
- Meteorological phenomena: no (particular) danger, no warnings in place
Explanation of the danger level 2:
- Avalanches: very little danger
- Earthquakes: felt across a wide area, no likelihood of damage to buildings
- Floods: rivers are unlikely to burst their banks and floods are unlikely but not impossible
- Forest fires: local fires can start spontaneously
- Meteorological phenomena that are normal for the respective season
Explanation of the danger level 3:
- Avalanches: exposed objects (mostly sections of transportation routes) can be endangered
- Earthquakes: felt across a wide area, likelihood of minor damage to buildings
- Floods: rivers may burst their banks locally in exposed places and flooding may occur.
- Forest fires: surface fires are likely
- Meteorological phenomena of an intensity slightly superior to the normal
Explanation of the danger level 4:
- Avalanches: exposed objects (mostly sections of transportation routes, but in isolated cases also buildings) can be endangered
- Earthquakes: felt strongly, likelihood of damage to buildings
- Floods: rivers may increasingly burst their banks and flooding may occur
- Forest fires: surface fires are very likely
- Meteorological phenomena of unusual intensity
Explanation of the danger level 5:
- Avalanches: transportation routes and settlements can be seriously endangered
- Earthquakes: felt strongly, high likelihood of widespread and severe damage to buildings
- Floods: rivers may burst their banks and flooding may occur in many places
- Forest fires: fires can start at any time
- Meteorological phenomena of very high intensity
Obey in any event the orders issued by your local authorities and be prepared for exceptional measures.
No evaluation
-
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00Wind slabs, old snow
In all aspects above approximately 1800m.0:Avalanches:3:SLF:1121,1111,1234,1233,1247,1246,1228,1245,1227,1244,1226,1243,1242,1221,1232,1231: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00Wind slabs
In all aspects above approximately 1800m.1:Avalanches:3:SLF:3224,2124,2134,2133,2132,2121,2111,3223,2123,3222,2122,3112,2212,3113,3111,2221,2222,3114,1241,2211,1213,3311: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00Wind slabs, old snow
In all aspects above approximately 2000m.2:Avalanches:3:SLF:4211,4242,5211,4241,5121,5112,4213,4231,5122,5113,5123,5124,5111,4232,4244,4243,4215,4214,4225,7231,7126,7125,7124,7123,7122,2223,7121,2224: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00Old snow, wind slabs
In all aspects above approximately 2000m.3:Avalanches:3:SLF:4224,4116,4223,4115,4222,4221,4212,4125,4124,4123,4122: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00New snow, old snow
In all aspects above approximately 2000m.4:Avalanches:3:SLF:5212,5214,1113,7113,1112,1114,4112,5216,4111,5215,7114,4114,7115,4113,1311,1312,5222,5223,5221,4121,1225,1224,1223,1222,5234,5231,5232: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00New snow and wind slabs
In all aspects above approximately 1800m.5:Avalanches:3:SLF:6131,6113,6132,6114,6211,6115,6122,6212,6111,6121,6112: -
Avalanches:Considerable danger, level 3
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00New snow, old snow
In all aspects above approximately 2200m.6:Avalanches:3:SLF:7222,7221,7211,7112,5233,7111: -
Avalanches:Moderate danger, level 2
Validity: 23.01.2021, 08:00 - 23.01.2021, 18:00Wind slabs
In all aspects above approximately 1400m.7:Avalanches:2:SLF:1122,8114,8113,8112,8111,3211,8215,8214,2131,8222,8213,2112,3221,8221,8212,8224,8211,1211,1212:
Naturgefahrenbulletin des Bundes
Ausgabedatum: Freitag, 22. Januar 2021 10:56 Uhr
Nächste Information: letzte Information
Ende Starker Föhnsturm in den Alpen
Wetter (Stand: 22.01.2021, 10:56 Uhr)
Aktuelle Situation
Die Schweiz liegt seit Mittwoch auf der Vorderseite einer umfangreichen Tiefdruckzone mit Zentrum über Grossbritannien in einer kräftigen südwestlichen Höhenströmung. Durch den grossräumigen Druckfall über Mitteleuropa hat sich damit über den Alpen eine stürmische Föhnlage eingestellt. In den bewarnten Föhntälern wurden seit Mittwochnachmittag verbreitet Windspitzen zwischen 80 und 120 km/h gemessen. In der stärksten Phase des Föhnsturms (Mittwochabend bis Donnerstagmorgen) wurde in Altdorf im Urner Reusstal sogar eine Böenspitze von 133 km/h gemessen. In der Nacht auf heute Freitag führte ein Teiltief von Westen her eine schwache Störung zur Alpennordseite, womit sich der Föhn vorübergehend abgeschwächt hat. Heute Vormittag gewann der Föhnsturm durch die Annäherung eines weiteren Teiltiefs über Südfrankreich nochmals an Stärke.
Prognose
Das erwähnte Teiltief verlagert heute Freitagnachmittag seinen Kern unter Abspaltung in Richtung Ligurisches Meer. Damit erfasst auch eine aktive Kaltfront die Alpennordseite, womit die Föhnphase zu Ende geht. In der Folge kommt es bei mässig bis starkem Südwestwind verbreitet zu Niederschlägen, die Schneefallgrenze sinkt dabei auf der Alpennordseite von etwa 1200 auf rund 500 Meter.