11. The National Hurricane Center's SLOSH model was used because the 
basin grid containing Galveston Bay had already been developed by the Center, 
and the meteorological data from Alicia necessary to execute the runs were in 
residence and available. The model runs were verified by comparing the com- 
puted surge with the recorded surge at Pleasure Pier, Pier 21, and the EXXON 
Baytown Refinery gages. 
12. Plates 1-10 are hydrographs at the specified locations. The 
Pleasure Pier and Pier 21 hydrographs show the peak of the surge coincides 
with the predicted high tide. Assuming the tide and surge effects are linearly 
superimposed, the surge relative to the predicted tide is about 7.4 ft at the 
Pleasure Pier on the ocean side and 4.9 ft at Pier 21 on the bay side of 
Galveston Island. At Freeport, Texas, there were three peaks, two on 17 August 
1 day prior to landfall and one approximately coinciding with landfall. 
The three peaks are about 2.9, 3.1, and 2.5 ft relative to the predicted tide. 
The highest surge value did not occur at landfall because of Freeport being 
on the "backside" of the storm; i.e., the winds at Freeport were primarily 
offshore at the time. 
13. As shown in Figure 2, the Pier 21 and Fort Point gages are located 
quite close to one another and the hydrographs reflect this. The Hannah 
Reef gage, located on the side of the bay opposite Pier 21 and Fort Point 
gages, shows a lower peak followed by a relatively long tail. The 
broader peak was probably caused by waters being moved out of Fort Bay into 
the northwest reaches of Galveston Bay by the predominantly southeast winds 
during the storm and then flowing back after the storm had passed. 
14. The Anahuac gage recorded until it was submerged; attempts were 
made to determine a high-water elevation nearby but the adjacent land was 
flat and featureless and overgrown with scrub vegetation. 
15. The hydrograph obtained at the EXXON Corporation's Baytown Refinery 
is a combination of readings from a strip-chart recorder and digital readout. 
The strip-chart recorder had a maximum excursion corresponding to about an 
8-ft elevation. The water level sensor continued to function normally, driving 
a remote readout from which surge heights were logged manually. The maximum 
surge recorded at the Baytown Refinery agrees very closely with nearby high 
water marks. 
16. The CERC field team deployed two surge packages in Matagorda Bay, 
one at Port Lavaca and the other one at Palacios, Texas. Data from these gages 
11 
