{"type": "Feature", "geometry": null, "properties": {"lang": "fr", "regions": [{"name": "Aravis", "regionID": "FR-02"}], "weather": {"wind": [], "comment": "s/falaises et au fil de l'ensoleillement.\n\u00e9parts plus probables dans les faces expos\u00e9es au soleil, dans les pentes raides et lisses (pentes", "isotherm0": [1800, 1800, 1700, 1600]}, "tendency": [{"comment": "

Le ciel se couvre en fin de journ\u00e9e. Le vent de Sud-

0 m 1 700 m 1 600 m

km/h 20 km/h 30 km/h

km/h 30 km/h 40 km/h

Tendance du mardi 10 f\u00e9vrier

Indice de risque limit\u00e9

", "dangerRating": "moderate", "tendencyType": "steady"}], "validTime": {"endTime": "2026-02-09T23:59:59+00:00", "startTime": "2026-02-08T15:00:00Z"}, "bulletinID": "FR-02-2026-02-09-20260208151350", "customData": {"MF": {"date": "2026-02-09", "massif": "ARAVIS", "redigeAt": "2026-02-08T16:00:00", "triggered": "

* Au-dessus de 2000 m en versants E/N/W

Pr\u00e9sence d'une couche fragile persistante enfouie. Difficilement d\u00e9clenchable par un\u00b7 skieur\u00b7euse. Risque d'avalanches en cascade

(par exemple, d\u00e9clenchement par la rupture d'une plaque \u00e0 vent). Cassure \u00e9paisse (50-80 cm) et large. Taille 2 (moyenne), rarement 3 (grande).

Observables : peu d'observables directs, r\u00e9alisation de tests CT et ECT.

(moyenne).

Observables : irr\u00e9gularit\u00e9s d'\u00e9paisseur du manteau neigeux, zones d'accumulation, fissures devant les skis ...

", "historical": {"wind": {"2000m": [25, 30, 40, 45, 50, 40, 25, 15, 15, 20, 15, 15, 20, 25, 25, 25, 25, 30, 30, 20, 10, 5, 5, 5, 10, 5, 5, 5], "2500m": [40, 55, 60, 65, 70, 60, 55, 45, 35, 35, 25, 25, 30, 35, 50, 45, 50, 50, 40, 30, 20, 10, 10, 10, 20, 15, 10, 5]}, "snowLine": {"north": [800, null, null, 800, null, 800, null], "south": [null, 900, null, 900, null, 1000, null]}, "freshSnow": [5, 7, 1, 15, 7, 0, 0]}, "source_file": "BRA.ARAVIS.2026-02-08.pdf", "spontaneous": "

herbeuses, dalles rocheuses). Taille 1 (petite) \u00e0 2 (moyenne).

Autre :

Risque de cassure de corniches.

", "typicalAvalancheSituations": ["neige vent\u00e9e", "couche fragile persistante", "couche fragile"]}}, "highlights": "N Indice de risque limit\u00e9.", "dangerRatings": [{"valid": true, "elevation": {"lowerBound": null, "upperBound": null}, "mainValue": "moderate"}], "publicationTime": "2026-02-08T15:13:50Z", "avalancheActivity": {"comment": "

herbeuses, dalles rocheuses). Taille 1 (petite) \u00e0 2 (moyenne).

Autre :

Risque de cassure de corniches.

(par exemple, d\u00e9clenchement par la rupture d'une plaque \u00e0 vent). Cassure \u00e9paisse (50-80 cm) et large. Taille 2 (moyenne), rarement 3 (grande).

Observables : peu d'observables directs, r\u00e9alisation de tests CT et ECT.

(moyenne).

Observables : irr\u00e9gularit\u00e9s d'\u00e9paisseur du manteau neigeux, zones d'accumulation, fissures devant les skis ...

", "highlights": "N Indice de risque limit\u00e9."}, "avalancheProblems": [{"order": 1, "aspects": ["N", "E", "S", "W"], "satLabel": "neige vent\u00e9e", "elevation": {"lowerBound": 2000}, "frequency": "few", "problemType": "wind_slab", "avalancheSize": "1"}, {"order": 2, "aspects": ["N", "E", "S", "W"], "satLabel": "couche fragile persistante", "elevation": {"lowerBound": 2000}, "frequency": "few", "problemType": "persistent_weak_layers", "avalancheSize": "1"}, {"order": 3, "aspects": ["N", "E", "S", "W"], "satLabel": "couche fragile", "elevation": {"lowerBound": 2000}, "frequency": "few", "problemType": "no_distinct_avalanche_problem", "avalancheSize": "1"}], "snowpackStructure": {"comment": "

Situation avalancheuse typique

couche fragile persistante neige vent\u00e9e

D\u00e9clenchements provoqu\u00e9s :

(par exemple, d\u00e9clenchement par la rupture d'une plaque \u00e0 vent). Cassure \u00e9paisse (50-80 cm) et large. Taille 2 (moyenne), rarement 3 (grande).

Observables : peu d'observables directs, r\u00e9alisation de tests CT et ECT.

(moyenne).

Observables : irr\u00e9gularit\u00e9s d'\u00e9paisseur du manteau neigeux, zones d'accumulation, fissures devant les skis ...

D\u00e9parts spontan\u00e9s :

herbeuses, dalles rocheuses). Taille 1 (petite) \u00e0 2 (moyenne).

Autre :

Risque de cassure de corniches.

"}}}