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Jeudi, 25 Mai 2017
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Evaluations des Vents

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Voici de quelle façon les vents sont évalués lorsqu'ils ne peuvent être mesurés.

Echelle Fujita, Vitesse (km/h) et description des dommages
  F0 F1 F2  
Damage Indicator 60-110 km/h 120-170 km/h 180-240 km/h Notes
Maison Some roofing/siding materials removed, awnings damaged, antennae bent Large areas of roofing/siding material, partial structural failure of roof Well-attached roof removed, a frame house may have other structural damage Frame houses includes those with brick veneer
Batiment Industriel Structure Acier Some roofing/siding materials removed, awnings damaged, antennae bent Large areas of roofing material stripped away, partial structural failure of roof Roof removed, partial structural failure of walls  
Maison Mobile
Some roofing/siding materials removed, awnings damaged, antennae bent Partial structural failure Obliterated, renderd unrecognizable Damage worse if mobile home not anchored
Grange de Ferme
Partial removal of roof Roof completely removed Destroyed to foundation F1 maximum if in poor condition or if cleanly lifted off foundation
Arbres Bien enracinés
Long branches down Intermitted trees uprooted and snapped at trunk Large areas of trees uprooted and snapped at trunk Damage worse if shallow rooted
Vehicule ou  equipment de Ferme
Vehicle not moved or tipped but a moving vehicle may be forced into another lane High-profiles vehicle may be moved or tipped over, moving low-profile vehicles may be forced off the road, farm wagons or equipment may be carried short distances  Low-profile vehicles may be dragged or carried a short distance but fewer than 10% are tipped over Low profile: cars, vans, pick-ups, farm tractors, etc. 
High profile: semi trucks, motor homes, buses, combines, etc.
Missiles A few light object missiles generated-e.g.  cans , garbage can lids, lawn chairs Some impact damge from light object missiles e.g. stones, branches, canoes, etc. Heavy objects such as vehicles and machinery may be dragged or carried short distances  

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