the grid point (I, J) and true north, e, was determined. The pair of 

 azimuthal angles that embraced 6* was sorted. The values of k and Wjj, 

 associated with the two angles so determined were used in the linear 

 interpolation to obtain their values at grid point (I, J). 



o 



A constant inflow angle of 20 was assumed in all simulations 

 except Carla for the decomposition of the wind speed before computing 

 the wind stress components. The computed water level at Galveston 

 during the early stage of Carla simulation using constant inflow 

 angle was lower than the observed. Careful examination of the 

 surface wind charts at 1200 GMT 9 September revealed that there was a 

 region along the Texas shelf where the cross shelf wind reversed 

 direction indicating a negative inflow angle. An example of an 

 analyzed wind map given by Miyasaki (1963), also shows negative 

 inflow angles along the Texas shelf. Therefore, the inflow angle was 

 allowed to vary as a function of the radial distance using the 

 empirically determined formula 



©jL for r < Rj^, 



(78) 



e2-(r-R-^)*0.5*A/T for r > R^^, 



o 



where A is a maximum inflow angle, 20 , R-j_ is the radial distance at 

 which the inflow angle was zero, and 



e^ = [(Ri/r)A2exp(l-{Ri/r))+(Jrf)2] - Jrf, 



©2 = [(Ri/r)K A2exp(l-(Ri/r)K)+(Jrf)2] - Jrf, 



59 



