def __init__(self):
# ============================================#
# initiate a new instance of thermocalcs class#
# ============================================#
self.tC = ThermoCalcs()
# ===========================================#
# initiate a new instance of shearcalcs class#
# ===========================================#
self.sC = ShearCalcs()
# Global height arrays for wind shear
self.u_3km = []
self.v_3km = []
self.u_6km = []
self.v_6km = []
self.u_9km = []
self.v_9km = []
self.u_12km = []
self.v_12km = []
