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from ._nomogram import calculate_swi as _calculate_swi
def calculate_swi(temperature_difference, convective_cloud_depth):
"""
Calculates the Szilagyi Waterspout Index for *temperature_difference* and *convective_cloud_depth*.
May raise :exc:`ValueError` if the values are not in range of the original nomogram.
"""
if temperature_difference < 0 or temperature_difference > 40:
raise ValueError("temperature_difference must be within <0, 40> range")
if convective_cloud_depth < 0 or convective_cloud_depth > 50000:
raise ValueError("convective_cloud_depth must be within <0, 50000> range")
return _calculate_swi(temperature_difference, convective_cloud_depth)
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