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Cyclones (winter storms)
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Tropical storms (hurricanes, typhoons)
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Place, emergence
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Alongside the polar front around the 45th grade of latitude.
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In the (sub-)tropes over warm water (>26°C).
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Season, frequency
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Approx. 180 low-pressure areas per year over the North Atlantic, 2 to 3 of them big winter storms.
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On average approx. 9 hurricanes per year on the Atlantic and in the Caribbean, 6 of them quite intense.
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Mainspring
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North-South-temperature contrast, intensity can also increase over land.
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Condensation processes: intensity declines rapidly over land.
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Circumference, composition
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1000 to 2000 km, complex constitution, cold front and warm front
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500 to 1000 km, symmetric
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Durability
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2 to 5 days
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up to 10 days
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Local storm durability
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3 to 24 hours
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2 to 6 hours
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Maximum wind speed
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70 to 180 km/h (20 to 50 m/s)
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120 to 300 km/h (33 to 90 m/s)
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Velocity
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up to 120 km/h (33 m/s)
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60 km/h (17 m/s)
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Rainfall
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moderate
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heavy
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Connoted dangers
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storm tide
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storm tide, tornados
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Damages
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Irregular strong winds causing damage over a huge area up to 1000 km away from the centre. Many small to medium damages.
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Winds within a typical radius of no more than 200 km from the centre („eye“). Small and big damages up to total loss. </span>
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