18-19 August 1991 —" Hurricane Bob" (Figure 35 
73. Bob reached tropical storm intensity on 16 August while located 
close to Bermuda and was upgraded to a hurricane on 17 August. The storm 
continued to intensify as it rapidly moved up the east coast, developing into 
a Category 3 hurricane (winds of 50 — 58 m/s (111 to 130 mph) on the 
Saffir/Simpson hurricane scale) as the eye passed 25 — 30 miles (40 — 48 km) 
east of Cape Hatteras, NC early on 19 August. Continuing up the coast, the 
storm finally made landfall on the Rhode Island coast late on 19 August. The 
maximum H,,. (at Gage 630) of 4.83 m (T, = 15.06 sec) was recorded at 2342 
EST on 18 August. Maximum onshore winds (from the northeast) approached 15 
m/s occurring several hours earlier at 1934 EST. Peak winds (from the 
northwest) exceeded 23 m/s near midnight on 18 August. This coincided with 
the minimum atmospheric pressure of 994.0 mb. Total precipitation was 43 mn. 
toao, Atmospheric Pressure, mb Gage 616 
990+ lalalatalatalaleaeal 
254 Wind Speed, m/sec 
360, Wind Direction, Deg True N 
Wave Height, H,,,, m Gage 630 
‘ 
34 
24 
Zz 
ra 
ee 
Sara RUT Tao ay, To Tae Tea Taal 
~y Wave Period, T,, sec Gage 630 
154 
104 
(Gana emer See Oe 
5 
Oh SU + T Colarton rans Tt 
2, Water Level from NGVD, m Gage 1 
4 
ele ABN ENG AYE 
° 
SS 
+ SAL A SLL Sa 
7 18 19 20 21 
AUGUST, 1991 
Figure 35. Data for Hurricane Bob, 18-19 August 1991 
68 
