indicates the first maximum of only a few centimeters. The estimated 

 period of tjq and 6q are 27 h and 12 h, respectively. In spite of its 

 small amplitude, tjq still dominates the response in the hydrographs 

 from Pensacola counterclockwise to Progreso. The striking result 

 however, is the generation of a 12 h period oscillation after the 

 peak surge. This mode is also observed in the Apalachicola and St. 

 Petersburg hydrographs. 



The very small initial rise of water levels along the Florida 

 shelf prior to the peak surge, together with the generation of the 12 

 h period oscillation motivated three additional storm runs for PATH4. 

 All have large Rjnax' ^"^ ^^'^^ three different forward speeds. 



The medium speed and large radius storm (HUR22) produced a 8.53 

 m maximum surge to the north of Cedar Key. The simulated hydrograph 

 at Cedar Key, Fig. 82, shows a peak surge of more than 5 m followed 

 by a strong 12 h period oscillation. The presence of the initial 

 rise of water level is hardly seen. Figure 83 reveals that a first 

 maiximum of less than 0.1 m occurs at approximately 1800 h on day 4, 

 At this time the water level at Cedar Key is decreasing and reaches a 

 minimum at 1200 h on day 4. The stipulated path and a large radius 

 of maximum wind resulted in larger draw down of water level in the 

 early stages due to stronger offshore directed wind preceding the 

 storm as compared to the simulation of HUR19. The hydrograph of tjq 

 shows a maximum peak of 0.24 m at 2300 h on day 4. An estimated 

 period of 29 h is determined from Fig. 83. Once again, the 

 hydrographs from stations on the left side of the track from 

 Pensacola to Progreso seem to depart from tjq signal, the situation 



140 



