python
def get_wind_level_str(wind_speed_float):
    """
    :param wind_speed_float:  风速 m/s
    :return: 风级
    """
    if wind_speed_float < 0.2:
        return 0
    elif wind_speed_float < 1.5:
        return 1
    elif wind_speed_float < 3.3:
        return 2
    elif wind_speed_float < 5.4:
        return 3
    elif wind_speed_float < 7.9:
        return 4
    elif wind_speed_float < 10.7:
        return 5
    elif wind_speed_float < 13.8:
        return 6
    elif wind_speed_float < 17.1:
        return 7
    elif wind_speed_float < 20.7:
        return 8
    elif wind_speed_float < 24.4:
        return 8
    elif wind_speed_float < 28.4:
        return 10
    elif wind_speed_float < 32.6:
        return 11
    elif wind_speed_float < 36.9:
        return 12
    elif wind_speed_float < 41.4:
        return 13
    else:
        return 14