to determine R and Wjjj from P^ which were required to construct the 

 wind fields. The graphical relationship between the radius of 

 maximum wind and the central pressure was analyzed using simple 

 linear regression to establish a functional relationship. The radius 

 of maximum wind was then determined. The maximum wind speed for a 

 stationary storm Wjj^g, is given as 



Wj„s = 0.9(l/pe)2(Pj^-Pj,)2 - (Rf/2) (76) 



Since there were no surface charts to analyze for the parameter k, a 

 constant value of 1 was assumed. As discussed earlier, the asymmetry 

 of the wind field was achieved by augmenting the maximum wind speed 

 by 



"m = "ms * 1.5(Vf°-63)(^0.37)j,os^^ ^77) 



where o was the angle between track direction and the surface wind 

 vector and To = 0.514791 for wind speed in m/s. The track of 



o 



hurricane Allen was approximately 285 (cf . Fig. 7, p. 41) relative 

 to true north. Assuming that the maximum wind occurred at right 

 angles to the right of the track, then a was zero at 25 relative to 

 true north. Eq. (78) was used to compute the maximum wind speed for 

 each grid point (I, J) and thus the surface wind speed at all 

 computational points can then be evaluated. 



49 



