1979 жылғы "Боб" атты Атлант мұзайнығы

Category 1 Atlantic hurricane in 1979

Hurricane Bob was the first Atlantic tropical cyclone to be officially designated using a masculine name after the discontinuation of Joint Army/Navy Phonetic Alphabet names. and at 1200 UTC on July 9, the disturbance was analyzed to have organized into a tropical depression – the third of such in the Atlantic that year. The depression strengthened rather quickly, and on the morning of July 10 a United States Air Force reconnaissance flight indicated that the tropical cyclone had strengthened to tropical storm intensity while situated 740 mile (1191 km) south of Louisiana. At the time the flight measured a minimum barometric pressure of 998 mbar (hPa; 29.47 inHg). Upon reaching tropical storm intensity, Bob began to curve further northward as opposed to its prior, northeasterly track, due to the presence of a strengthening, upper level trough to the storm's west. The trough greatly enhanced atmospheric conditions around Bob, allowing for the tropical cyclone to intensify rapidly. Though the hurricane's maximum sustained winds would hold steady at for approximately the ensuing twelve hours, the storm's barometric pressure would fluctuate before reaching a minimum of 981 mbar (hPa; 28.98 inHg) at 1200 UTC that day; this would be Bob's lowest documented barometric pressure. At around the same time, the hurricane made landfall west of Grand Isle, Louisiana. In preparation for the storm, 8,000 offshore oil workers were evacuated. On land, 2,500 residents and tourists on Grand Isle were also evacuated.

Effects in the United States as a result of Bob were typical of a minimal hurricane, and were not of considerable nature. At the coast, Bob caused moderate storm surge, resulting in coastal waters rising to as high as 5 feet (2 m) above normal. The rough seas sunk several boats and caused significant damage to piers. In addition, widespread power outages impacted 53,000 electricity customers in the city's area. Similar incidents took place in Houma, Louisiana. Rainfall associated with the hurricane peaked at in Louisiana, where the storm made landfall. Statewide rainfall totals peaked at in Pascagoula, Mississippi and Robertsdale, Alabama, respectively. Further inland, the remnants of Bob dropped heavy rainfall in the Midwestern United States, peaking at at a station in Indiana University Bloomington. In addition to the strong winds and heavy rain, Bob produced eight tornadoes across the southern United States. One of these tornadoes caused $27,500 in damage after striking areas of Biloxi, Mississippi. Overall, Hurricane Bob caused approximately $20 million in damage. However, $15 million in damage resulted from flooding in Indiana, with the rest of the storm's monetary impacts arising from coastal regions.